diff --git a/instrumentation-api-incubator/src/main/java/io/opentelemetry/instrumentation/api/incubator/builder/internal/DefaultHttpClientInstrumenterBuilder.java b/instrumentation-api-incubator/src/main/java/io/opentelemetry/instrumentation/api/incubator/builder/internal/DefaultHttpClientInstrumenterBuilder.java
index 1903bed26987..4f40eac327b7 100644
--- a/instrumentation-api-incubator/src/main/java/io/opentelemetry/instrumentation/api/incubator/builder/internal/DefaultHttpClientInstrumenterBuilder.java
+++ b/instrumentation-api-incubator/src/main/java/io/opentelemetry/instrumentation/api/incubator/builder/internal/DefaultHttpClientInstrumenterBuilder.java
@@ -38,6 +38,7 @@
 import java.util.function.Consumer;
 import java.util.function.Function;
 import java.util.function.Supplier;
+import java.util.function.UnaryOperator;
 import javax.annotation.Nullable;
 
 /**
@@ -54,16 +55,16 @@ public final class DefaultHttpClientInstrumenterBuilder<REQUEST, RESPONSE> {
 
   private final List<AttributesExtractor<? super REQUEST, ? super RESPONSE>> additionalExtractors =
       new ArrayList<>();
-  private Function<SpanStatusExtractor<REQUEST, RESPONSE>, SpanStatusExtractor<REQUEST, RESPONSE>>
-      statusExtractorTransformer = Function.identity();
+  private UnaryOperator<SpanStatusExtractor<REQUEST, RESPONSE>> statusExtractorTransformer =
+      UnaryOperator.identity();
   private final HttpClientAttributesExtractorBuilder<REQUEST, RESPONSE>
       httpAttributesExtractorBuilder;
   private final HttpClientAttributesGetter<REQUEST, RESPONSE> attributesGetter;
   private final HttpSpanNameExtractorBuilder<REQUEST> httpSpanNameExtractorBuilder;
 
   @Nullable private final TextMapSetter<REQUEST> headerSetter;
-  private Function<SpanNameExtractor<REQUEST>, ? extends SpanNameExtractor<REQUEST>>
-      spanNameExtractorTransformer = Function.identity();
+  private UnaryOperator<SpanNameExtractor<REQUEST>> spanNameExtractorTransformer =
+      UnaryOperator.identity();
   private boolean emitExperimentalHttpClientTelemetry = false;
   private Consumer<InstrumenterBuilder<REQUEST, RESPONSE>> builderCustomizer = b -> {};
 
@@ -113,8 +114,7 @@ public DefaultHttpClientInstrumenterBuilder<REQUEST, RESPONSE> addAttributesExtr
 
   @CanIgnoreReturnValue
   public DefaultHttpClientInstrumenterBuilder<REQUEST, RESPONSE> setStatusExtractor(
-      Function<SpanStatusExtractor<REQUEST, RESPONSE>, SpanStatusExtractor<REQUEST, RESPONSE>>
-          statusExtractor) {
+      UnaryOperator<SpanStatusExtractor<REQUEST, RESPONSE>> statusExtractor) {
     this.statusExtractorTransformer = statusExtractor;
     return this;
   }
@@ -192,9 +192,8 @@ public DefaultHttpClientInstrumenterBuilder<REQUEST, RESPONSE> setRedactQueryPar
   /** Sets custom {@link SpanNameExtractor} via transform function. */
   @CanIgnoreReturnValue
   public DefaultHttpClientInstrumenterBuilder<REQUEST, RESPONSE> setSpanNameExtractor(
-      Function<SpanNameExtractor<REQUEST>, SpanNameExtractor<REQUEST>>
-          spanNameExtractorTransformer) {
-    this.spanNameExtractorTransformer = spanNameExtractorTransformer;
+      UnaryOperator<SpanNameExtractor<REQUEST>> spanNameExtractor) {
+    this.spanNameExtractorTransformer = spanNameExtractor;
     return this;
   }
 
diff --git a/instrumentation-api-incubator/src/main/java/io/opentelemetry/instrumentation/api/incubator/builder/internal/DefaultHttpServerInstrumenterBuilder.java b/instrumentation-api-incubator/src/main/java/io/opentelemetry/instrumentation/api/incubator/builder/internal/DefaultHttpServerInstrumenterBuilder.java
index bfee127f7cf1..89ae196c54d7 100644
--- a/instrumentation-api-incubator/src/main/java/io/opentelemetry/instrumentation/api/incubator/builder/internal/DefaultHttpServerInstrumenterBuilder.java
+++ b/instrumentation-api-incubator/src/main/java/io/opentelemetry/instrumentation/api/incubator/builder/internal/DefaultHttpServerInstrumenterBuilder.java
@@ -31,8 +31,8 @@
 import java.util.List;
 import java.util.Objects;
 import java.util.function.Consumer;
-import java.util.function.Function;
 import java.util.function.Supplier;
+import java.util.function.UnaryOperator;
 import javax.annotation.Nullable;
 
 /**
@@ -46,15 +46,15 @@ public final class DefaultHttpServerInstrumenterBuilder<REQUEST, RESPONSE> {
 
   private final List<AttributesExtractor<? super REQUEST, ? super RESPONSE>> additionalExtractors =
       new ArrayList<>();
-  private Function<SpanStatusExtractor<REQUEST, RESPONSE>, SpanStatusExtractor<REQUEST, RESPONSE>>
-      statusExtractorTransformer = Function.identity();
+  private UnaryOperator<SpanStatusExtractor<REQUEST, RESPONSE>> statusExtractorTransformer =
+      UnaryOperator.identity();
   private final HttpServerAttributesExtractorBuilder<REQUEST, RESPONSE>
       httpAttributesExtractorBuilder;
   private final HttpSpanNameExtractorBuilder<REQUEST> httpSpanNameExtractorBuilder;
 
   @Nullable private final TextMapGetter<REQUEST> headerGetter;
-  private Function<SpanNameExtractor<REQUEST>, SpanNameExtractor<REQUEST>>
-      spanNameExtractorTransformer = Function.identity();
+  private UnaryOperator<SpanNameExtractor<REQUEST>> spanNameExtractorTransformer =
+      UnaryOperator.identity();
   private final HttpServerRouteBuilder<REQUEST> httpServerRouteBuilder;
   private final HttpServerAttributesGetter<REQUEST, RESPONSE> attributesGetter;
   private boolean emitExperimentalHttpServerTelemetry = false;
@@ -107,8 +107,7 @@ public DefaultHttpServerInstrumenterBuilder<REQUEST, RESPONSE> addAttributesExtr
 
   @CanIgnoreReturnValue
   public DefaultHttpServerInstrumenterBuilder<REQUEST, RESPONSE> setStatusExtractor(
-      Function<SpanStatusExtractor<REQUEST, RESPONSE>, SpanStatusExtractor<REQUEST, RESPONSE>>
-          statusExtractor) {
+      UnaryOperator<SpanStatusExtractor<REQUEST, RESPONSE>> statusExtractor) {
     this.statusExtractorTransformer = statusExtractor;
     return this;
   }
@@ -175,9 +174,8 @@ public DefaultHttpServerInstrumenterBuilder<REQUEST, RESPONSE> setKnownMethods(
   /** Sets custom {@link SpanNameExtractor} via transform function. */
   @CanIgnoreReturnValue
   public DefaultHttpServerInstrumenterBuilder<REQUEST, RESPONSE> setSpanNameExtractor(
-      Function<SpanNameExtractor<REQUEST>, SpanNameExtractor<REQUEST>>
-          spanNameExtractorTransformer) {
-    this.spanNameExtractorTransformer = spanNameExtractorTransformer;
+      UnaryOperator<SpanNameExtractor<REQUEST>> spanNameExtractor) {
+    this.spanNameExtractorTransformer = spanNameExtractor;
     return this;
   }
 
diff --git a/instrumentation-api-incubator/src/main/java/io/opentelemetry/instrumentation/api/incubator/instrumenter/InstrumenterCustomizer.java b/instrumentation-api-incubator/src/main/java/io/opentelemetry/instrumentation/api/incubator/instrumenter/InstrumenterCustomizer.java
index 6a7d914399d6..8edef423ccfb 100644
--- a/instrumentation-api-incubator/src/main/java/io/opentelemetry/instrumentation/api/incubator/instrumenter/InstrumenterCustomizer.java
+++ b/instrumentation-api-incubator/src/main/java/io/opentelemetry/instrumentation/api/incubator/instrumenter/InstrumenterCustomizer.java
@@ -12,6 +12,7 @@
 import io.opentelemetry.instrumentation.api.instrumenter.OperationMetrics;
 import io.opentelemetry.instrumentation.api.instrumenter.SpanNameExtractor;
 import java.util.function.Function;
+import java.util.function.UnaryOperator;
 
 /**
  * Provides customizations for instrumentation, including operation metrics, attributes extraction,
@@ -75,7 +76,22 @@ InstrumenterCustomizer addAttributesExtractors(
    *
    * @param spanNameExtractorTransformer function that transforms the original span name extractor
    * @return this InstrumenterCustomizer for method chaining
+   * @deprecated Use {@link #setSpanNameExtractor(UnaryOperator)} instead.
+   */
+  @Deprecated
+  @SuppressWarnings("FunctionalInterfaceClash")
+  default InstrumenterCustomizer setSpanNameExtractor(
+      Function<SpanNameExtractor<?>, SpanNameExtractor<?>> spanNameExtractorTransformer) {
+    return setSpanNameExtractor(spanNameExtractorTransformer::apply);
+  }
+
+  /**
+   * Sets a transformer function that will modify the {@link SpanNameExtractor}. This allows
+   * customizing how span names are generated for the instrumented operations.
+   *
+   * @param spanNameExtractor function that transforms the original span name extractor
+   * @return this InstrumenterCustomizer for method chaining
    */
   InstrumenterCustomizer setSpanNameExtractor(
-      Function<SpanNameExtractor<?>, SpanNameExtractor<?>> spanNameExtractorTransformer);
+      UnaryOperator<SpanNameExtractor<?>> spanNameExtractor);
 }
diff --git a/instrumentation-api-incubator/src/main/java/io/opentelemetry/instrumentation/api/incubator/instrumenter/internal/InstrumenterCustomizerImpl.java b/instrumentation-api-incubator/src/main/java/io/opentelemetry/instrumentation/api/incubator/instrumenter/internal/InstrumenterCustomizerImpl.java
index b277789bc255..faa866fde176 100644
--- a/instrumentation-api-incubator/src/main/java/io/opentelemetry/instrumentation/api/incubator/instrumenter/internal/InstrumenterCustomizerImpl.java
+++ b/instrumentation-api-incubator/src/main/java/io/opentelemetry/instrumentation/api/incubator/instrumenter/internal/InstrumenterCustomizerImpl.java
@@ -11,7 +11,7 @@
 import io.opentelemetry.instrumentation.api.instrumenter.OperationMetrics;
 import io.opentelemetry.instrumentation.api.instrumenter.SpanNameExtractor;
 import io.opentelemetry.instrumentation.api.internal.InternalInstrumenterCustomizer;
-import java.util.function.Function;
+import java.util.function.UnaryOperator;
 
 /**
  * This class is internal and is hence not for public use. Its APIs are unstable and can change at
@@ -56,9 +56,10 @@ public InstrumenterCustomizer addContextCustomizer(ContextCustomizer<?> customiz
   }
 
   @Override
+  @SuppressWarnings("FunctionalInterfaceClash") // interface has deprecated overload
   public InstrumenterCustomizer setSpanNameExtractor(
-      Function<SpanNameExtractor<?>, SpanNameExtractor<?>> spanNameExtractorTransformer) {
-    customizer.setSpanNameExtractor(spanNameExtractorTransformer);
+      UnaryOperator<SpanNameExtractor<?>> spanNameExtractor) {
+    customizer.setSpanNameExtractor(spanNameExtractor);
     return this;
   }
 }
diff --git a/instrumentation-api/src/main/java/io/opentelemetry/instrumentation/api/instrumenter/InstrumenterBuilder.java b/instrumentation-api/src/main/java/io/opentelemetry/instrumentation/api/instrumenter/InstrumenterBuilder.java
index 0b724d725eb6..d65c9619bdc8 100644
--- a/instrumentation-api/src/main/java/io/opentelemetry/instrumentation/api/instrumenter/InstrumenterBuilder.java
+++ b/instrumentation-api/src/main/java/io/opentelemetry/instrumentation/api/instrumenter/InstrumenterBuilder.java
@@ -33,7 +33,7 @@
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Set;
-import java.util.function.Function;
+import java.util.function.UnaryOperator;
 import java.util.logging.Logger;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
@@ -427,8 +427,7 @@ public void addContextCustomizer(ContextCustomizer<REQUEST> customizer) {
 
             @Override
             public void setSpanNameExtractor(
-                Function<SpanNameExtractor<? super REQUEST>, SpanNameExtractor<? super REQUEST>>
-                    spanNameExtractorTransformer) {
+                UnaryOperator<SpanNameExtractor<? super REQUEST>> spanNameExtractorTransformer) {
               builder.spanNameExtractor =
                   spanNameExtractorTransformer.apply(builder.spanNameExtractor);
             }
diff --git a/instrumentation-api/src/main/java/io/opentelemetry/instrumentation/api/internal/InternalInstrumenterCustomizer.java b/instrumentation-api/src/main/java/io/opentelemetry/instrumentation/api/internal/InternalInstrumenterCustomizer.java
index d1a0efd7b330..5bf5cc54c715 100644
--- a/instrumentation-api/src/main/java/io/opentelemetry/instrumentation/api/internal/InternalInstrumenterCustomizer.java
+++ b/instrumentation-api/src/main/java/io/opentelemetry/instrumentation/api/internal/InternalInstrumenterCustomizer.java
@@ -9,7 +9,7 @@
 import io.opentelemetry.instrumentation.api.instrumenter.ContextCustomizer;
 import io.opentelemetry.instrumentation.api.instrumenter.OperationMetrics;
 import io.opentelemetry.instrumentation.api.instrumenter.SpanNameExtractor;
-import java.util.function.Function;
+import java.util.function.UnaryOperator;
 
 /**
  * This class is internal and is hence not for public use. Its APIs are unstable and can change at
@@ -29,6 +29,5 @@ void addAttributesExtractors(
   void addContextCustomizer(ContextCustomizer<REQUEST> customizer);
 
   void setSpanNameExtractor(
-      Function<SpanNameExtractor<? super REQUEST>, SpanNameExtractor<? super REQUEST>>
-          spanNameExtractorTransformer);
+      UnaryOperator<SpanNameExtractor<? super REQUEST>> spanNameExtractorTransformer);
 }
diff --git a/instrumentation/apache-dubbo-2.7/library-autoconfigure/src/main/java/io/opentelemetry/instrumentation/apachedubbo/v2_7/DubboTelemetryBuilder.java b/instrumentation/apache-dubbo-2.7/library-autoconfigure/src/main/java/io/opentelemetry/instrumentation/apachedubbo/v2_7/DubboTelemetryBuilder.java
index 6b7eba14ae9a..c33fcf6a71de 100644
--- a/instrumentation/apache-dubbo-2.7/library-autoconfigure/src/main/java/io/opentelemetry/instrumentation/apachedubbo/v2_7/DubboTelemetryBuilder.java
+++ b/instrumentation/apache-dubbo-2.7/library-autoconfigure/src/main/java/io/opentelemetry/instrumentation/apachedubbo/v2_7/DubboTelemetryBuilder.java
@@ -23,6 +23,7 @@
 import java.util.ArrayList;
 import java.util.List;
 import java.util.function.Function;
+import java.util.function.UnaryOperator;
 import javax.annotation.Nullable;
 import org.apache.dubbo.rpc.Result;
 
@@ -38,12 +39,10 @@ public final class DubboTelemetryBuilder {
   @Nullable private String peerService;
   private final List<AttributesExtractor<DubboRequest, Result>> attributesExtractors =
       new ArrayList<>();
-  private Function<
-          SpanNameExtractor<DubboRequest>, ? extends SpanNameExtractor<? super DubboRequest>>
-      clientSpanNameExtractorTransformer = Function.identity();
-  private Function<
-          SpanNameExtractor<DubboRequest>, ? extends SpanNameExtractor<? super DubboRequest>>
-      serverSpanNameExtractorTransformer = Function.identity();
+  private UnaryOperator<SpanNameExtractor<DubboRequest>> clientSpanNameExtractorTransformer =
+      UnaryOperator.identity();
+  private UnaryOperator<SpanNameExtractor<DubboRequest>> serverSpanNameExtractorTransformer =
+      UnaryOperator.identity();
 
   DubboTelemetryBuilder(OpenTelemetry openTelemetry) {
     this.openTelemetry = openTelemetry;
@@ -65,20 +64,50 @@ public DubboTelemetryBuilder addAttributesExtractor(
     return this;
   }
 
-  /** Sets custom client {@link SpanNameExtractor} via transform function. */
+  /**
+   * Sets custom client {@link SpanNameExtractor} via transform function.
+   *
+   * @deprecated Use {@link #setClientSpanNameExtractor(UnaryOperator)} instead.
+   */
+  @Deprecated
   @CanIgnoreReturnValue
+  @SuppressWarnings("unchecked") // cast result to SpanNameExtractor<DubboRequest>
   public DubboTelemetryBuilder setClientSpanNameExtractor(
       Function<SpanNameExtractor<DubboRequest>, ? extends SpanNameExtractor<? super DubboRequest>>
           clientSpanNameExtractor) {
+    return setClientSpanNameExtractor(
+        (UnaryOperator<SpanNameExtractor<DubboRequest>>)
+            input -> (SpanNameExtractor<DubboRequest>) clientSpanNameExtractor.apply(input));
+  }
+
+  /** Sets custom client {@link SpanNameExtractor} via transform function. */
+  @CanIgnoreReturnValue
+  public DubboTelemetryBuilder setClientSpanNameExtractor(
+      UnaryOperator<SpanNameExtractor<DubboRequest>> clientSpanNameExtractor) {
     this.clientSpanNameExtractorTransformer = clientSpanNameExtractor;
     return this;
   }
 
-  /** Sets custom server {@link SpanNameExtractor} via transform function. */
+  /**
+   * Sets custom server {@link SpanNameExtractor} via transform function.
+   *
+   * @deprecated Use {@link #setServerSpanNameExtractor(UnaryOperator)} instead.
+   */
+  @Deprecated
   @CanIgnoreReturnValue
+  @SuppressWarnings("unchecked") // cast result to SpanNameExtractor<DubboRequest>
   public DubboTelemetryBuilder setServerSpanNameExtractor(
       Function<SpanNameExtractor<DubboRequest>, ? extends SpanNameExtractor<? super DubboRequest>>
           serverSpanNameExtractor) {
+    return setServerSpanNameExtractor(
+        (UnaryOperator<SpanNameExtractor<DubboRequest>>)
+            input -> (SpanNameExtractor<DubboRequest>) serverSpanNameExtractor.apply(input));
+  }
+
+  /** Sets custom server {@link SpanNameExtractor} via transform function. */
+  @CanIgnoreReturnValue
+  public DubboTelemetryBuilder setServerSpanNameExtractor(
+      UnaryOperator<SpanNameExtractor<DubboRequest>> serverSpanNameExtractor) {
     this.serverSpanNameExtractorTransformer = serverSpanNameExtractor;
     return this;
   }
@@ -90,9 +119,9 @@ public DubboTelemetry build() {
     DubboRpcAttributesGetter rpcAttributesGetter = DubboRpcAttributesGetter.INSTANCE;
     SpanNameExtractor<DubboRequest> spanNameExtractor =
         RpcSpanNameExtractor.create(rpcAttributesGetter);
-    SpanNameExtractor<? super DubboRequest> clientSpanNameExtractor =
+    SpanNameExtractor<DubboRequest> clientSpanNameExtractor =
         clientSpanNameExtractorTransformer.apply(spanNameExtractor);
-    SpanNameExtractor<? super DubboRequest> serverSpanNameExtractor =
+    SpanNameExtractor<DubboRequest> serverSpanNameExtractor =
         serverSpanNameExtractorTransformer.apply(spanNameExtractor);
     DubboClientNetworkAttributesGetter netClientAttributesGetter =
         new DubboClientNetworkAttributesGetter();
diff --git a/instrumentation/apache-httpclient/apache-httpclient-4.3/library/src/main/java/io/opentelemetry/instrumentation/apachehttpclient/v4_3/ApacheHttpClientTelemetryBuilder.java b/instrumentation/apache-httpclient/apache-httpclient-4.3/library/src/main/java/io/opentelemetry/instrumentation/apachehttpclient/v4_3/ApacheHttpClientTelemetryBuilder.java
index 850f082eb4e8..43b4f5dbaca7 100644
--- a/instrumentation/apache-httpclient/apache-httpclient-4.3/library/src/main/java/io/opentelemetry/instrumentation/apachehttpclient/v4_3/ApacheHttpClientTelemetryBuilder.java
+++ b/instrumentation/apache-httpclient/apache-httpclient-4.3/library/src/main/java/io/opentelemetry/instrumentation/apachehttpclient/v4_3/ApacheHttpClientTelemetryBuilder.java
@@ -14,6 +14,7 @@
 import io.opentelemetry.instrumentation.api.semconv.http.HttpClientAttributesExtractorBuilder;
 import java.util.Collection;
 import java.util.function.Function;
+import java.util.function.UnaryOperator;
 import org.apache.http.HttpResponse;
 
 /** A builder for {@link ApacheHttpClientTelemetry}. */
@@ -89,13 +90,27 @@ public ApacheHttpClientTelemetryBuilder setKnownMethods(Collection<String> known
     return this;
   }
 
-  /** Sets custom {@link SpanNameExtractor} via transform function. */
+  /**
+   * Sets custom {@link SpanNameExtractor} via transform function.
+   *
+   * @deprecated Use {@link #setSpanNameExtractor(UnaryOperator)} instead.
+   */
+  @Deprecated
   @CanIgnoreReturnValue
   public ApacheHttpClientTelemetryBuilder setSpanNameExtractor(
       Function<
               SpanNameExtractor<ApacheHttpClientRequest>,
               SpanNameExtractor<ApacheHttpClientRequest>>
           spanNameExtractorTransformer) {
+    return setSpanNameExtractor(
+        (UnaryOperator<SpanNameExtractor<ApacheHttpClientRequest>>)
+            spanNameExtractorTransformer::apply);
+  }
+
+  /** Sets custom {@link SpanNameExtractor} via transform function. */
+  @CanIgnoreReturnValue
+  public ApacheHttpClientTelemetryBuilder setSpanNameExtractor(
+      UnaryOperator<SpanNameExtractor<ApacheHttpClientRequest>> spanNameExtractorTransformer) {
     builder.setSpanNameExtractor(spanNameExtractorTransformer);
     return this;
   }
diff --git a/instrumentation/apache-httpclient/apache-httpclient-5.2/library/src/main/java/io/opentelemetry/instrumentation/apachehttpclient/v5_2/ApacheHttpClientTelemetryBuilder.java b/instrumentation/apache-httpclient/apache-httpclient-5.2/library/src/main/java/io/opentelemetry/instrumentation/apachehttpclient/v5_2/ApacheHttpClientTelemetryBuilder.java
index 82cc6442bc2d..84266154d865 100644
--- a/instrumentation/apache-httpclient/apache-httpclient-5.2/library/src/main/java/io/opentelemetry/instrumentation/apachehttpclient/v5_2/ApacheHttpClientTelemetryBuilder.java
+++ b/instrumentation/apache-httpclient/apache-httpclient-5.2/library/src/main/java/io/opentelemetry/instrumentation/apachehttpclient/v5_2/ApacheHttpClientTelemetryBuilder.java
@@ -14,6 +14,7 @@
 import io.opentelemetry.instrumentation.api.semconv.http.HttpClientAttributesExtractorBuilder;
 import java.util.Collection;
 import java.util.function.Function;
+import java.util.function.UnaryOperator;
 import org.apache.hc.core5.http.HttpResponse;
 
 /** A builder for {@link ApacheHttpClientTelemetry}. */
@@ -89,13 +90,27 @@ public ApacheHttpClientTelemetryBuilder setKnownMethods(Collection<String> known
     return this;
   }
 
-  /** Sets custom {@link SpanNameExtractor} via transform function. */
+  /**
+   * Sets custom {@link SpanNameExtractor} via transform function.
+   *
+   * @deprecated Use {@link #setSpanNameExtractor(UnaryOperator)} instead.
+   */
+  @Deprecated
   @CanIgnoreReturnValue
   public ApacheHttpClientTelemetryBuilder setSpanNameExtractor(
       Function<
               SpanNameExtractor<ApacheHttpClientRequest>,
               SpanNameExtractor<ApacheHttpClientRequest>>
           spanNameExtractorTransformer) {
+    return setSpanNameExtractor(
+        (UnaryOperator<SpanNameExtractor<ApacheHttpClientRequest>>)
+            spanNameExtractorTransformer::apply);
+  }
+
+  /** Sets custom {@link SpanNameExtractor} via transform function. */
+  @CanIgnoreReturnValue
+  public ApacheHttpClientTelemetryBuilder setSpanNameExtractor(
+      UnaryOperator<SpanNameExtractor<ApacheHttpClientRequest>> spanNameExtractorTransformer) {
     builder.setSpanNameExtractor(spanNameExtractorTransformer);
     return this;
   }
diff --git a/instrumentation/armeria/armeria-1.3/library/src/main/java/io/opentelemetry/instrumentation/armeria/v1_3/ArmeriaClientTelemetryBuilder.java b/instrumentation/armeria/armeria-1.3/library/src/main/java/io/opentelemetry/instrumentation/armeria/v1_3/ArmeriaClientTelemetryBuilder.java
index b46ca75cb4dc..9c36a8d7b5a1 100644
--- a/instrumentation/armeria/armeria-1.3/library/src/main/java/io/opentelemetry/instrumentation/armeria/v1_3/ArmeriaClientTelemetryBuilder.java
+++ b/instrumentation/armeria/armeria-1.3/library/src/main/java/io/opentelemetry/instrumentation/armeria/v1_3/ArmeriaClientTelemetryBuilder.java
@@ -19,6 +19,7 @@
 import io.opentelemetry.instrumentation.armeria.v1_3.internal.Experimental;
 import java.util.Collection;
 import java.util.function.Function;
+import java.util.function.UnaryOperator;
 
 public final class ArmeriaClientTelemetryBuilder {
 
@@ -36,13 +37,27 @@ public final class ArmeriaClientTelemetryBuilder {
     builder = ArmeriaInstrumenterBuilderFactory.getClientBuilder(openTelemetry);
   }
 
-  /** Sets the status extractor for client spans. */
+  /**
+   * Sets the status extractor for client spans.
+   *
+   * @deprecated Use {@link #setStatusExtractor(UnaryOperator)} instead.
+   */
+  @Deprecated
   @CanIgnoreReturnValue
   public ArmeriaClientTelemetryBuilder setStatusExtractor(
       Function<
               SpanStatusExtractor<ClientRequestContext, RequestLog>,
               SpanStatusExtractor<ClientRequestContext, RequestLog>>
           statusExtractor) {
+    return setStatusExtractor(
+        (UnaryOperator<SpanStatusExtractor<ClientRequestContext, RequestLog>>)
+            statusExtractor::apply);
+  }
+
+  /** Sets the status extractor for client spans. */
+  @CanIgnoreReturnValue
+  public ArmeriaClientTelemetryBuilder setStatusExtractor(
+      UnaryOperator<SpanStatusExtractor<ClientRequestContext, RequestLog>> statusExtractor) {
     builder.setStatusExtractor(statusExtractor);
     return this;
   }
@@ -101,11 +116,24 @@ public ArmeriaClientTelemetryBuilder setKnownMethods(Collection<String> knownMet
     return this;
   }
 
-  /** Sets custom client {@link SpanNameExtractor} via transform function. */
+  /**
+   * Sets custom client {@link SpanNameExtractor} via transform function.
+   *
+   * @deprecated Use {@link #setSpanNameExtractor(UnaryOperator)} instead.
+   */
+  @Deprecated
   @CanIgnoreReturnValue
   public ArmeriaClientTelemetryBuilder setSpanNameExtractor(
       Function<SpanNameExtractor<ClientRequestContext>, SpanNameExtractor<ClientRequestContext>>
           clientSpanNameExtractor) {
+    return setSpanNameExtractor(
+        (UnaryOperator<SpanNameExtractor<ClientRequestContext>>) clientSpanNameExtractor::apply);
+  }
+
+  /** Sets custom client {@link SpanNameExtractor} via transform function. */
+  @CanIgnoreReturnValue
+  public ArmeriaClientTelemetryBuilder setSpanNameExtractor(
+      UnaryOperator<SpanNameExtractor<ClientRequestContext>> clientSpanNameExtractor) {
     builder.setSpanNameExtractor(clientSpanNameExtractor);
     return this;
   }
diff --git a/instrumentation/armeria/armeria-1.3/library/src/main/java/io/opentelemetry/instrumentation/armeria/v1_3/ArmeriaServerTelemetryBuilder.java b/instrumentation/armeria/armeria-1.3/library/src/main/java/io/opentelemetry/instrumentation/armeria/v1_3/ArmeriaServerTelemetryBuilder.java
index c7e7c3ee3fa3..84418da78050 100644
--- a/instrumentation/armeria/armeria-1.3/library/src/main/java/io/opentelemetry/instrumentation/armeria/v1_3/ArmeriaServerTelemetryBuilder.java
+++ b/instrumentation/armeria/armeria-1.3/library/src/main/java/io/opentelemetry/instrumentation/armeria/v1_3/ArmeriaServerTelemetryBuilder.java
@@ -19,6 +19,7 @@
 import io.opentelemetry.instrumentation.armeria.v1_3.internal.Experimental;
 import java.util.Collection;
 import java.util.function.Function;
+import java.util.function.UnaryOperator;
 
 public final class ArmeriaServerTelemetryBuilder {
 
@@ -34,13 +35,27 @@ public final class ArmeriaServerTelemetryBuilder {
     builder = ArmeriaInstrumenterBuilderFactory.getServerBuilder(openTelemetry);
   }
 
-  /** Sets the status extractor for server spans. */
+  /**
+   * Sets the status extractor for server spans.
+   *
+   * @deprecated Use {@link #setStatusExtractor(UnaryOperator)} instead.
+   */
+  @Deprecated
   @CanIgnoreReturnValue
   public ArmeriaServerTelemetryBuilder setStatusExtractor(
       Function<
               SpanStatusExtractor<ServiceRequestContext, RequestLog>,
               SpanStatusExtractor<ServiceRequestContext, RequestLog>>
           statusExtractor) {
+    return setStatusExtractor(
+        (UnaryOperator<SpanStatusExtractor<ServiceRequestContext, RequestLog>>)
+            statusExtractor::apply);
+  }
+
+  /** Sets the status extractor for server spans. */
+  @CanIgnoreReturnValue
+  public ArmeriaServerTelemetryBuilder setStatusExtractor(
+      UnaryOperator<SpanStatusExtractor<ServiceRequestContext, RequestLog>> statusExtractor) {
     builder.setStatusExtractor(statusExtractor);
     return this;
   }
@@ -99,11 +114,24 @@ public ArmeriaServerTelemetryBuilder setKnownMethods(Collection<String> knownMet
     return this;
   }
 
-  /** Sets custom server {@link SpanNameExtractor} via transform function. */
+  /**
+   * Sets custom server {@link SpanNameExtractor} via transform function.
+   *
+   * @deprecated Use {@link #setSpanNameExtractor(UnaryOperator)} instead.
+   */
+  @Deprecated
   @CanIgnoreReturnValue
   public ArmeriaServerTelemetryBuilder setSpanNameExtractor(
       Function<SpanNameExtractor<ServiceRequestContext>, SpanNameExtractor<ServiceRequestContext>>
           serverSpanNameExtractor) {
+    return setSpanNameExtractor(
+        (UnaryOperator<SpanNameExtractor<ServiceRequestContext>>) serverSpanNameExtractor::apply);
+  }
+
+  /** Sets custom server {@link SpanNameExtractor} via transform function. */
+  @CanIgnoreReturnValue
+  public ArmeriaServerTelemetryBuilder setSpanNameExtractor(
+      UnaryOperator<SpanNameExtractor<ServiceRequestContext>> serverSpanNameExtractor) {
     builder.setSpanNameExtractor(serverSpanNameExtractor);
     return this;
   }
diff --git a/instrumentation/grpc-1.6/library/src/main/java/io/opentelemetry/instrumentation/grpc/v1_6/GrpcTelemetryBuilder.java b/instrumentation/grpc-1.6/library/src/main/java/io/opentelemetry/instrumentation/grpc/v1_6/GrpcTelemetryBuilder.java
index 62addaafa146..fe0575c0f15e 100644
--- a/instrumentation/grpc-1.6/library/src/main/java/io/opentelemetry/instrumentation/grpc/v1_6/GrpcTelemetryBuilder.java
+++ b/instrumentation/grpc-1.6/library/src/main/java/io/opentelemetry/instrumentation/grpc/v1_6/GrpcTelemetryBuilder.java
@@ -27,6 +27,7 @@
 import java.util.Collections;
 import java.util.List;
 import java.util.function.Function;
+import java.util.function.UnaryOperator;
 import javax.annotation.Nullable;
 
 /** A builder of {@link GrpcTelemetry}. */
@@ -39,10 +40,10 @@ public final class GrpcTelemetryBuilder {
   private final OpenTelemetry openTelemetry;
   @Nullable private String peerService;
 
-  private Function<SpanNameExtractor<GrpcRequest>, ? extends SpanNameExtractor<? super GrpcRequest>>
-      clientSpanNameExtractorTransformer = Function.identity();
-  private Function<SpanNameExtractor<GrpcRequest>, ? extends SpanNameExtractor<? super GrpcRequest>>
-      serverSpanNameExtractorTransformer = Function.identity();
+  private UnaryOperator<SpanNameExtractor<GrpcRequest>> clientSpanNameExtractorTransformer =
+      UnaryOperator.identity();
+  private UnaryOperator<SpanNameExtractor<GrpcRequest>> serverSpanNameExtractorTransformer =
+      UnaryOperator.identity();
   private final List<AttributesExtractor<? super GrpcRequest, ? super Status>>
       additionalExtractors = new ArrayList<>();
   private final List<AttributesExtractor<? super GrpcRequest, ? super Status>>
@@ -94,20 +95,50 @@ public GrpcTelemetryBuilder addServerAttributeExtractor(
     return this;
   }
 
-  /** Sets custom client {@link SpanNameExtractor} via transform function. */
+  /**
+   * Sets custom client {@link SpanNameExtractor} via transform function.
+   *
+   * @deprecated Use {@link #setClientSpanNameExtractor(UnaryOperator)} instead.
+   */
+  @Deprecated
   @CanIgnoreReturnValue
+  @SuppressWarnings("unchecked") // cast result to SpanNameExtractor<GrpcRequest>
   public GrpcTelemetryBuilder setClientSpanNameExtractor(
       Function<SpanNameExtractor<GrpcRequest>, ? extends SpanNameExtractor<? super GrpcRequest>>
           clientSpanNameExtractor) {
+    return setClientSpanNameExtractor(
+        (UnaryOperator<SpanNameExtractor<GrpcRequest>>)
+            input -> (SpanNameExtractor<GrpcRequest>) clientSpanNameExtractor.apply(input));
+  }
+
+  /** Sets custom client {@link SpanNameExtractor} via transform function. */
+  @CanIgnoreReturnValue
+  public GrpcTelemetryBuilder setClientSpanNameExtractor(
+      UnaryOperator<SpanNameExtractor<GrpcRequest>> clientSpanNameExtractor) {
     this.clientSpanNameExtractorTransformer = clientSpanNameExtractor;
     return this;
   }
 
-  /** Sets custom server {@link SpanNameExtractor} via transform function. */
+  /**
+   * Sets custom server {@link SpanNameExtractor} via transform function.
+   *
+   * @deprecated Use {@link #setServerSpanNameExtractor(UnaryOperator)} instead.
+   */
+  @Deprecated
   @CanIgnoreReturnValue
+  @SuppressWarnings("unchecked") // cast result to SpanNameExtractor<GrpcRequest>
   public GrpcTelemetryBuilder setServerSpanNameExtractor(
       Function<SpanNameExtractor<GrpcRequest>, ? extends SpanNameExtractor<? super GrpcRequest>>
           serverSpanNameExtractor) {
+    return setServerSpanNameExtractor(
+        (UnaryOperator<SpanNameExtractor<GrpcRequest>>)
+            input -> (SpanNameExtractor<GrpcRequest>) serverSpanNameExtractor.apply(input));
+  }
+
+  /** Sets custom server {@link SpanNameExtractor} via transform function. */
+  @CanIgnoreReturnValue
+  public GrpcTelemetryBuilder setServerSpanNameExtractor(
+      UnaryOperator<SpanNameExtractor<GrpcRequest>> serverSpanNameExtractor) {
     this.serverSpanNameExtractorTransformer = serverSpanNameExtractor;
     return this;
   }
diff --git a/instrumentation/java-http-client/library/src/main/java/io/opentelemetry/instrumentation/javahttpclient/JavaHttpClientTelemetryBuilder.java b/instrumentation/java-http-client/library/src/main/java/io/opentelemetry/instrumentation/javahttpclient/JavaHttpClientTelemetryBuilder.java
index a2be7db706b2..d5cc848db438 100644
--- a/instrumentation/java-http-client/library/src/main/java/io/opentelemetry/instrumentation/javahttpclient/JavaHttpClientTelemetryBuilder.java
+++ b/instrumentation/java-http-client/library/src/main/java/io/opentelemetry/instrumentation/javahttpclient/JavaHttpClientTelemetryBuilder.java
@@ -18,6 +18,7 @@
 import java.net.http.HttpResponse;
 import java.util.Collection;
 import java.util.function.Function;
+import java.util.function.UnaryOperator;
 
 public final class JavaHttpClientTelemetryBuilder {
 
@@ -88,11 +89,24 @@ public JavaHttpClientTelemetryBuilder setKnownMethods(Collection<String> knownMe
     return this;
   }
 
-  /** Sets custom {@link SpanNameExtractor} via transform function. */
+  /**
+   * Sets custom {@link SpanNameExtractor} via transform function.
+   *
+   * @deprecated Use {@link #setSpanNameExtractor(UnaryOperator)} instead.
+   */
+  @Deprecated
   @CanIgnoreReturnValue
   public JavaHttpClientTelemetryBuilder setSpanNameExtractor(
       Function<SpanNameExtractor<HttpRequest>, SpanNameExtractor<HttpRequest>>
           spanNameExtractorTransformer) {
+    return setSpanNameExtractor(
+        (UnaryOperator<SpanNameExtractor<HttpRequest>>) spanNameExtractorTransformer::apply);
+  }
+
+  /** Sets custom {@link SpanNameExtractor} via transform function. */
+  @CanIgnoreReturnValue
+  public JavaHttpClientTelemetryBuilder setSpanNameExtractor(
+      UnaryOperator<SpanNameExtractor<HttpRequest>> spanNameExtractorTransformer) {
     builder.setSpanNameExtractor(spanNameExtractorTransformer);
     return this;
   }
diff --git a/instrumentation/java-http-server/library/src/main/java/io/opentelemetry/instrumentation/javahttpserver/JavaHttpServerTelemetryBuilder.java b/instrumentation/java-http-server/library/src/main/java/io/opentelemetry/instrumentation/javahttpserver/JavaHttpServerTelemetryBuilder.java
index 8a303b74087f..e8860805c5f1 100644
--- a/instrumentation/java-http-server/library/src/main/java/io/opentelemetry/instrumentation/javahttpserver/JavaHttpServerTelemetryBuilder.java
+++ b/instrumentation/java-http-server/library/src/main/java/io/opentelemetry/instrumentation/javahttpserver/JavaHttpServerTelemetryBuilder.java
@@ -17,6 +17,7 @@
 import io.opentelemetry.instrumentation.javahttpserver.internal.JavaHttpServerInstrumenterBuilderUtil;
 import java.util.Collection;
 import java.util.function.Function;
+import java.util.function.UnaryOperator;
 
 public final class JavaHttpServerTelemetryBuilder {
 
@@ -39,13 +40,26 @@ public final class JavaHttpServerTelemetryBuilder {
             JavaHttpServerExchangeGetter.INSTANCE);
   }
 
-  /** Sets the status extractor for server spans. */
+  /**
+   * Sets the status extractor for server spans.
+   *
+   * @deprecated Use {@link #setStatusExtractor(UnaryOperator)} instead.
+   */
+  @Deprecated
   @CanIgnoreReturnValue
   public JavaHttpServerTelemetryBuilder setStatusExtractor(
       Function<
               SpanStatusExtractor<HttpExchange, HttpExchange>,
               SpanStatusExtractor<HttpExchange, HttpExchange>>
           statusExtractor) {
+    return setStatusExtractor(
+        (UnaryOperator<SpanStatusExtractor<HttpExchange, HttpExchange>>) statusExtractor::apply);
+  }
+
+  /** Sets the status extractor for server spans. */
+  @CanIgnoreReturnValue
+  public JavaHttpServerTelemetryBuilder setStatusExtractor(
+      UnaryOperator<SpanStatusExtractor<HttpExchange, HttpExchange>> statusExtractor) {
     builder.setStatusExtractor(statusExtractor);
     return this;
   }
@@ -104,12 +118,25 @@ public JavaHttpServerTelemetryBuilder setKnownMethods(Collection<String> knownMe
     return this;
   }
 
-  /** Sets custom server {@link SpanNameExtractor} via transform function. */
+  /**
+   * Sets custom {@link SpanNameExtractor} via transform function.
+   *
+   * @deprecated Use {@link #setSpanNameExtractor(UnaryOperator)} instead.
+   */
+  @Deprecated
   @CanIgnoreReturnValue
   public JavaHttpServerTelemetryBuilder setSpanNameExtractor(
       Function<SpanNameExtractor<HttpExchange>, SpanNameExtractor<HttpExchange>>
-          serverSpanNameExtractor) {
-    builder.setSpanNameExtractor(serverSpanNameExtractor);
+          spanNameExtractorTransformer) {
+    return setSpanNameExtractor(
+        (UnaryOperator<SpanNameExtractor<HttpExchange>>) spanNameExtractorTransformer::apply);
+  }
+
+  /** Sets custom {@link SpanNameExtractor} via transform function. */
+  @CanIgnoreReturnValue
+  public JavaHttpServerTelemetryBuilder setSpanNameExtractor(
+      UnaryOperator<SpanNameExtractor<HttpExchange>> spanNameExtractorTransformer) {
+    builder.setSpanNameExtractor(spanNameExtractorTransformer);
     return this;
   }
 
diff --git a/instrumentation/jetty-httpclient/jetty-httpclient-12.0/library/src/main/java/io/opentelemetry/instrumentation/jetty/httpclient/v12_0/JettyClientTelemetryBuilder.java b/instrumentation/jetty-httpclient/jetty-httpclient-12.0/library/src/main/java/io/opentelemetry/instrumentation/jetty/httpclient/v12_0/JettyClientTelemetryBuilder.java
index 580fb65d0ca0..55459288e92a 100644
--- a/instrumentation/jetty-httpclient/jetty-httpclient-12.0/library/src/main/java/io/opentelemetry/instrumentation/jetty/httpclient/v12_0/JettyClientTelemetryBuilder.java
+++ b/instrumentation/jetty-httpclient/jetty-httpclient-12.0/library/src/main/java/io/opentelemetry/instrumentation/jetty/httpclient/v12_0/JettyClientTelemetryBuilder.java
@@ -15,6 +15,7 @@
 import io.opentelemetry.instrumentation.jetty.httpclient.v12_0.internal.JettyHttpClientInstrumenterBuilderFactory;
 import java.util.Collection;
 import java.util.function.Function;
+import java.util.function.UnaryOperator;
 import org.eclipse.jetty.client.HttpClientTransport;
 import org.eclipse.jetty.client.Request;
 import org.eclipse.jetty.client.Response;
@@ -102,11 +103,24 @@ public JettyClientTelemetryBuilder setKnownMethods(Collection<String> knownMetho
     return this;
   }
 
-  /** Sets custom {@link SpanNameExtractor} via transform function. */
+  /**
+   * Sets custom {@link SpanNameExtractor} via transform function.
+   *
+   * @deprecated Use {@link #setSpanNameExtractor(UnaryOperator)} instead.
+   */
+  @Deprecated
   @CanIgnoreReturnValue
   public JettyClientTelemetryBuilder setSpanNameExtractor(
       Function<SpanNameExtractor<Request>, SpanNameExtractor<Request>>
           spanNameExtractorTransformer) {
+    return setSpanNameExtractor(
+        (UnaryOperator<SpanNameExtractor<Request>>) spanNameExtractorTransformer::apply);
+  }
+
+  /** Sets custom {@link SpanNameExtractor} via transform function. */
+  @CanIgnoreReturnValue
+  public JettyClientTelemetryBuilder setSpanNameExtractor(
+      UnaryOperator<SpanNameExtractor<Request>> spanNameExtractorTransformer) {
     builder.setSpanNameExtractor(spanNameExtractorTransformer);
     return this;
   }
diff --git a/instrumentation/jetty-httpclient/jetty-httpclient-9.2/library/src/main/java/io/opentelemetry/instrumentation/jetty/httpclient/v9_2/JettyClientTelemetryBuilder.java b/instrumentation/jetty-httpclient/jetty-httpclient-9.2/library/src/main/java/io/opentelemetry/instrumentation/jetty/httpclient/v9_2/JettyClientTelemetryBuilder.java
index 60cddb3e23fb..3b1021a526f9 100644
--- a/instrumentation/jetty-httpclient/jetty-httpclient-9.2/library/src/main/java/io/opentelemetry/instrumentation/jetty/httpclient/v9_2/JettyClientTelemetryBuilder.java
+++ b/instrumentation/jetty-httpclient/jetty-httpclient-9.2/library/src/main/java/io/opentelemetry/instrumentation/jetty/httpclient/v9_2/JettyClientTelemetryBuilder.java
@@ -15,6 +15,7 @@
 import io.opentelemetry.instrumentation.jetty.httpclient.v9_2.internal.JettyHttpClientInstrumenterBuilderFactory;
 import java.util.Collection;
 import java.util.function.Function;
+import java.util.function.UnaryOperator;
 import org.eclipse.jetty.client.HttpClientTransport;
 import org.eclipse.jetty.client.api.Request;
 import org.eclipse.jetty.client.api.Response;
@@ -102,11 +103,24 @@ public JettyClientTelemetryBuilder setKnownMethods(Collection<String> knownMetho
     return this;
   }
 
-  /** Sets custom {@link SpanNameExtractor} via transform function. */
+  /**
+   * Sets custom {@link SpanNameExtractor} via transform function.
+   *
+   * @deprecated Use {@link #setSpanNameExtractor(UnaryOperator)} instead.
+   */
+  @Deprecated
   @CanIgnoreReturnValue
   public JettyClientTelemetryBuilder setSpanNameExtractor(
       Function<SpanNameExtractor<Request>, SpanNameExtractor<Request>>
           spanNameExtractorTransformer) {
+    return setSpanNameExtractor(
+        (UnaryOperator<SpanNameExtractor<Request>>) spanNameExtractorTransformer::apply);
+  }
+
+  /** Sets custom {@link SpanNameExtractor} via transform function. */
+  @CanIgnoreReturnValue
+  public JettyClientTelemetryBuilder setSpanNameExtractor(
+      UnaryOperator<SpanNameExtractor<Request>> spanNameExtractorTransformer) {
     builder.setSpanNameExtractor(spanNameExtractorTransformer);
     return this;
   }
diff --git a/instrumentation/ktor/ktor-2-common/library/src/main/kotlin/io/opentelemetry/instrumentation/ktor/v2_0/common/AbstractKtorClientTelemetryBuilder.kt b/instrumentation/ktor/ktor-2-common/library/src/main/kotlin/io/opentelemetry/instrumentation/ktor/v2_0/common/AbstractKtorClientTelemetryBuilder.kt
index 2e603e758273..718c7250a72f 100644
--- a/instrumentation/ktor/ktor-2-common/library/src/main/kotlin/io/opentelemetry/instrumentation/ktor/v2_0/common/AbstractKtorClientTelemetryBuilder.kt
+++ b/instrumentation/ktor/ktor-2-common/library/src/main/kotlin/io/opentelemetry/instrumentation/ktor/v2_0/common/AbstractKtorClientTelemetryBuilder.kt
@@ -16,6 +16,7 @@ import io.opentelemetry.instrumentation.api.instrumenter.AttributesExtractor
 import io.opentelemetry.instrumentation.api.instrumenter.SpanNameExtractor
 import io.opentelemetry.instrumentation.ktor.v2_0.common.internal.KtorBuilderUtil
 import java.util.function.Function
+import java.util.function.UnaryOperator
 
 abstract class AbstractKtorClientTelemetryBuilder(
   private val instrumentationName: String
@@ -78,8 +79,13 @@ abstract class AbstractKtorClientTelemetryBuilder(
     })
   }
 
+  @Deprecated("Use spanNameExtractor(UnaryOperator) instead", ReplaceWith("spanNameExtractor(spanNameExtractorTransformer::apply)"))
   fun spanNameExtractor(spanNameExtractorTransformer: Function<SpanNameExtractor<HttpRequestData>, SpanNameExtractor<HttpRequestData>>) {
-    builder.setSpanNameExtractor(spanNameExtractorTransformer)
+    spanNameExtractor(spanNameExtractorTransformer::apply)
+  }
+
+  fun spanNameExtractor(spanNameExtractor: UnaryOperator<SpanNameExtractor<HttpRequestData>>) {
+    builder.setSpanNameExtractor(spanNameExtractor)
   }
 
   class ExtractorBuilder {
diff --git a/instrumentation/ktor/ktor-2-common/library/src/main/kotlin/io/opentelemetry/instrumentation/ktor/v2_0/common/AbstractKtorServerTelemetryBuilder.kt b/instrumentation/ktor/ktor-2-common/library/src/main/kotlin/io/opentelemetry/instrumentation/ktor/v2_0/common/AbstractKtorServerTelemetryBuilder.kt
index bf1c9292a679..0323cae40ac9 100644
--- a/instrumentation/ktor/ktor-2-common/library/src/main/kotlin/io/opentelemetry/instrumentation/ktor/v2_0/common/AbstractKtorServerTelemetryBuilder.kt
+++ b/instrumentation/ktor/ktor-2-common/library/src/main/kotlin/io/opentelemetry/instrumentation/ktor/v2_0/common/AbstractKtorServerTelemetryBuilder.kt
@@ -20,6 +20,7 @@ import io.opentelemetry.instrumentation.api.instrumenter.SpanStatusBuilder
 import io.opentelemetry.instrumentation.api.instrumenter.SpanStatusExtractor
 import io.opentelemetry.instrumentation.ktor.v2_0.common.internal.KtorBuilderUtil
 import java.util.function.Function
+import java.util.function.UnaryOperator
 
 abstract class AbstractKtorServerTelemetryBuilder(private val instrumentationName: String) {
   companion object {
@@ -88,8 +89,13 @@ abstract class AbstractKtorServerTelemetryBuilder(private val instrumentationNam
     )
   }
 
+  @Deprecated("Use spanNameExtractor(UnaryOperator) instead", ReplaceWith("spanNameExtractor(spanNameExtractorTransformer::apply)"))
   fun spanNameExtractor(spanNameExtractorTransformer: Function<SpanNameExtractor<ApplicationRequest>, SpanNameExtractor<ApplicationRequest>>) {
-    builder.setSpanNameExtractor(spanNameExtractorTransformer)
+    spanNameExtractor(spanNameExtractorTransformer::apply)
+  }
+
+  fun spanNameExtractor(spanNameExtractor: UnaryOperator<SpanNameExtractor<ApplicationRequest>>) {
+    builder.setSpanNameExtractor(spanNameExtractor)
   }
 
   class ExtractorBuilder {
diff --git a/instrumentation/netty/netty-4.1/library/src/main/java/io/opentelemetry/instrumentation/netty/v4_1/NettyClientTelemetryBuilder.java b/instrumentation/netty/netty-4.1/library/src/main/java/io/opentelemetry/instrumentation/netty/v4_1/NettyClientTelemetryBuilder.java
index 236dc36bc299..d56c4cd8f651 100644
--- a/instrumentation/netty/netty-4.1/library/src/main/java/io/opentelemetry/instrumentation/netty/v4_1/NettyClientTelemetryBuilder.java
+++ b/instrumentation/netty/netty-4.1/library/src/main/java/io/opentelemetry/instrumentation/netty/v4_1/NettyClientTelemetryBuilder.java
@@ -19,6 +19,7 @@
 import io.opentelemetry.instrumentation.netty.v4_1.internal.Experimental;
 import java.util.Collection;
 import java.util.function.Function;
+import java.util.function.UnaryOperator;
 
 /** A builder of {@link NettyClientTelemetry}. */
 public final class NettyClientTelemetryBuilder {
@@ -93,11 +94,25 @@ public NettyClientTelemetryBuilder setKnownMethods(Collection<String> knownMetho
     return this;
   }
 
-  /** Sets custom {@link SpanNameExtractor} via transform function. */
+  /**
+   * Sets custom {@link SpanNameExtractor} via transform function.
+   *
+   * @deprecated Use {@link #setSpanNameExtractor(UnaryOperator)} instead.
+   */
+  @Deprecated
   @CanIgnoreReturnValue
   public NettyClientTelemetryBuilder setSpanNameExtractor(
       Function<SpanNameExtractor<HttpRequestAndChannel>, SpanNameExtractor<HttpRequestAndChannel>>
           spanNameExtractorTransformer) {
+    return setSpanNameExtractor(
+        (UnaryOperator<SpanNameExtractor<HttpRequestAndChannel>>)
+            spanNameExtractorTransformer::apply);
+  }
+
+  /** Sets custom {@link SpanNameExtractor} via transform function. */
+  @CanIgnoreReturnValue
+  public NettyClientTelemetryBuilder setSpanNameExtractor(
+      UnaryOperator<SpanNameExtractor<HttpRequestAndChannel>> spanNameExtractorTransformer) {
     builder.setSpanNameExtractor(spanNameExtractorTransformer);
     return this;
   }
diff --git a/instrumentation/okhttp/okhttp-3.0/library/src/main/java/io/opentelemetry/instrumentation/okhttp/v3_0/OkHttpTelemetryBuilder.java b/instrumentation/okhttp/okhttp-3.0/library/src/main/java/io/opentelemetry/instrumentation/okhttp/v3_0/OkHttpTelemetryBuilder.java
index a4a3496546dd..90f26273275a 100644
--- a/instrumentation/okhttp/okhttp-3.0/library/src/main/java/io/opentelemetry/instrumentation/okhttp/v3_0/OkHttpTelemetryBuilder.java
+++ b/instrumentation/okhttp/okhttp-3.0/library/src/main/java/io/opentelemetry/instrumentation/okhttp/v3_0/OkHttpTelemetryBuilder.java
@@ -15,6 +15,7 @@
 import io.opentelemetry.instrumentation.okhttp.v3_0.internal.OkHttpClientInstrumenterBuilderFactory;
 import java.util.Collection;
 import java.util.function.Function;
+import java.util.function.UnaryOperator;
 import okhttp3.Interceptor;
 import okhttp3.Response;
 
@@ -86,11 +87,24 @@ public OkHttpTelemetryBuilder setKnownMethods(Collection<String> knownMethods) {
     return this;
   }
 
-  /** Sets custom {@link SpanNameExtractor} via transform function. */
+  /**
+   * Sets custom {@link SpanNameExtractor} via transform function.
+   *
+   * @deprecated Use {@link #setSpanNameExtractor(UnaryOperator)} instead.
+   */
+  @Deprecated
   @CanIgnoreReturnValue
   public OkHttpTelemetryBuilder setSpanNameExtractor(
       Function<SpanNameExtractor<Interceptor.Chain>, SpanNameExtractor<Interceptor.Chain>>
           spanNameExtractorTransformer) {
+    return setSpanNameExtractor(
+        (UnaryOperator<SpanNameExtractor<Interceptor.Chain>>) spanNameExtractorTransformer::apply);
+  }
+
+  /** Sets custom {@link SpanNameExtractor} via transform function. */
+  @CanIgnoreReturnValue
+  public OkHttpTelemetryBuilder setSpanNameExtractor(
+      UnaryOperator<SpanNameExtractor<Interceptor.Chain>> spanNameExtractorTransformer) {
     builder.setSpanNameExtractor(spanNameExtractorTransformer);
     return this;
   }
diff --git a/instrumentation/r2dbc-1.0/library/src/main/java/io/opentelemetry/instrumentation/r2dbc/v1_0/R2dbcTelemetryBuilder.java b/instrumentation/r2dbc-1.0/library/src/main/java/io/opentelemetry/instrumentation/r2dbc/v1_0/R2dbcTelemetryBuilder.java
index 76630c6ff818..e98fb5e48d9b 100644
--- a/instrumentation/r2dbc-1.0/library/src/main/java/io/opentelemetry/instrumentation/r2dbc/v1_0/R2dbcTelemetryBuilder.java
+++ b/instrumentation/r2dbc-1.0/library/src/main/java/io/opentelemetry/instrumentation/r2dbc/v1_0/R2dbcTelemetryBuilder.java
@@ -13,14 +13,15 @@
 import io.opentelemetry.instrumentation.r2dbc.v1_0.internal.Experimental;
 import io.opentelemetry.instrumentation.r2dbc.v1_0.internal.R2dbcInstrumenterBuilder;
 import java.util.function.Function;
+import java.util.function.UnaryOperator;
 
 /** A builder of {@link R2dbcTelemetry}. */
 public final class R2dbcTelemetryBuilder {
 
   private final R2dbcInstrumenterBuilder instrumenterBuilder;
   private boolean statementSanitizationEnabled = true;
-  private Function<SpanNameExtractor<DbExecution>, ? extends SpanNameExtractor<? super DbExecution>>
-      spanNameExtractorTransformer = Function.identity();
+  private UnaryOperator<SpanNameExtractor<DbExecution>> spanNameExtractorTransformer =
+      UnaryOperator.identity();
   private boolean sqlCommenterEnabled;
 
   static {
@@ -50,12 +51,27 @@ public R2dbcTelemetryBuilder setStatementSanitizationEnabled(boolean enabled) {
     return this;
   }
 
-  /** Sets custom {@link SpanNameExtractor} via transform function. */
+  /**
+   * Sets custom {@link SpanNameExtractor} via transform function.
+   *
+   * @deprecated Use {@link #setSpanNameExtractor(UnaryOperator)} instead.
+   */
+  @Deprecated
   @CanIgnoreReturnValue
+  @SuppressWarnings("unchecked") // cast result to SpanNameExtractor<DbExecution>
   public R2dbcTelemetryBuilder setSpanNameExtractor(
       Function<SpanNameExtractor<DbExecution>, ? extends SpanNameExtractor<? super DbExecution>>
           spanNameExtractorTransformer) {
-    this.spanNameExtractorTransformer = spanNameExtractorTransformer;
+    return setSpanNameExtractor(
+        (UnaryOperator<SpanNameExtractor<DbExecution>>)
+            input -> (SpanNameExtractor<DbExecution>) spanNameExtractorTransformer.apply(input));
+  }
+
+  /** Sets custom {@link SpanNameExtractor} via transform function. */
+  @CanIgnoreReturnValue
+  public R2dbcTelemetryBuilder setSpanNameExtractor(
+      UnaryOperator<SpanNameExtractor<DbExecution>> spanNameExtractor) {
+    this.spanNameExtractorTransformer = spanNameExtractor;
     return this;
   }
 
diff --git a/instrumentation/r2dbc-1.0/library/src/main/java/io/opentelemetry/instrumentation/r2dbc/v1_0/internal/R2dbcInstrumenterBuilder.java b/instrumentation/r2dbc-1.0/library/src/main/java/io/opentelemetry/instrumentation/r2dbc/v1_0/internal/R2dbcInstrumenterBuilder.java
index 6db0f3a48caf..3a8c90d3e48b 100644
--- a/instrumentation/r2dbc-1.0/library/src/main/java/io/opentelemetry/instrumentation/r2dbc/v1_0/internal/R2dbcInstrumenterBuilder.java
+++ b/instrumentation/r2dbc-1.0/library/src/main/java/io/opentelemetry/instrumentation/r2dbc/v1_0/internal/R2dbcInstrumenterBuilder.java
@@ -17,7 +17,7 @@
 import io.opentelemetry.instrumentation.api.semconv.network.ServerAttributesExtractor;
 import java.util.ArrayList;
 import java.util.List;
-import java.util.function.Function;
+import java.util.function.UnaryOperator;
 
 /**
  * This class is internal and is hence not for public use. Its APIs are unstable and can change at
@@ -44,10 +44,9 @@ public R2dbcInstrumenterBuilder addAttributesExtractor(
   }
 
   public Instrumenter<DbExecution, Void> build(
-      Function<SpanNameExtractor<DbExecution>, ? extends SpanNameExtractor<? super DbExecution>>
-          spanNameExtractorTransformer,
+      UnaryOperator<SpanNameExtractor<DbExecution>> spanNameExtractorTransformer,
       boolean statementSanitizationEnabled) {
-    SpanNameExtractor<? super DbExecution> spanNameExtractor =
+    SpanNameExtractor<DbExecution> spanNameExtractor =
         spanNameExtractorTransformer.apply(
             DbClientSpanNameExtractor.create(R2dbcSqlAttributesGetter.INSTANCE));
 
diff --git a/instrumentation/ratpack/ratpack-1.7/library/src/main/java/io/opentelemetry/instrumentation/ratpack/v1_7/RatpackClientTelemetryBuilder.java b/instrumentation/ratpack/ratpack-1.7/library/src/main/java/io/opentelemetry/instrumentation/ratpack/v1_7/RatpackClientTelemetryBuilder.java
index b7c2b6c70217..ff0366d2b534 100644
--- a/instrumentation/ratpack/ratpack-1.7/library/src/main/java/io/opentelemetry/instrumentation/ratpack/v1_7/RatpackClientTelemetryBuilder.java
+++ b/instrumentation/ratpack/ratpack-1.7/library/src/main/java/io/opentelemetry/instrumentation/ratpack/v1_7/RatpackClientTelemetryBuilder.java
@@ -15,6 +15,7 @@
 import io.opentelemetry.instrumentation.ratpack.v1_7.internal.RatpackClientInstrumenterBuilderFactory;
 import java.util.Collection;
 import java.util.function.Function;
+import java.util.function.UnaryOperator;
 import ratpack.http.client.HttpResponse;
 import ratpack.http.client.RequestSpec;
 
@@ -84,11 +85,24 @@ public RatpackClientTelemetryBuilder setKnownMethods(Collection<String> knownMet
     return this;
   }
 
-  /** Sets custom client {@link SpanNameExtractor} via transform function. */
+  /**
+   * Sets custom client {@link SpanNameExtractor} via transform function.
+   *
+   * @deprecated Use {@link #setSpanNameExtractor(UnaryOperator)} instead.
+   */
+  @Deprecated
   @CanIgnoreReturnValue
   public RatpackClientTelemetryBuilder setSpanNameExtractor(
       Function<SpanNameExtractor<RequestSpec>, SpanNameExtractor<RequestSpec>>
           clientSpanNameExtractor) {
+    return setSpanNameExtractor(
+        (UnaryOperator<SpanNameExtractor<RequestSpec>>) clientSpanNameExtractor::apply);
+  }
+
+  /** Sets custom client {@link SpanNameExtractor} via transform function. */
+  @CanIgnoreReturnValue
+  public RatpackClientTelemetryBuilder setSpanNameExtractor(
+      UnaryOperator<SpanNameExtractor<RequestSpec>> clientSpanNameExtractor) {
     builder.setSpanNameExtractor(clientSpanNameExtractor);
     return this;
   }
diff --git a/instrumentation/ratpack/ratpack-1.7/library/src/main/java/io/opentelemetry/instrumentation/ratpack/v1_7/RatpackServerTelemetryBuilder.java b/instrumentation/ratpack/ratpack-1.7/library/src/main/java/io/opentelemetry/instrumentation/ratpack/v1_7/RatpackServerTelemetryBuilder.java
index 7baa9c082e5d..21df54da775e 100644
--- a/instrumentation/ratpack/ratpack-1.7/library/src/main/java/io/opentelemetry/instrumentation/ratpack/v1_7/RatpackServerTelemetryBuilder.java
+++ b/instrumentation/ratpack/ratpack-1.7/library/src/main/java/io/opentelemetry/instrumentation/ratpack/v1_7/RatpackServerTelemetryBuilder.java
@@ -15,6 +15,7 @@
 import io.opentelemetry.instrumentation.ratpack.v1_7.internal.RatpackServerInstrumenterBuilderFactory;
 import java.util.Collection;
 import java.util.function.Function;
+import java.util.function.UnaryOperator;
 import ratpack.http.Request;
 import ratpack.http.Response;
 
@@ -88,10 +89,23 @@ public RatpackServerTelemetryBuilder setKnownMethods(Collection<String> knownMet
     return this;
   }
 
-  /** Sets custom server {@link SpanNameExtractor} via transform function. */
+  /**
+   * Sets custom server {@link SpanNameExtractor} via transform function.
+   *
+   * @deprecated Use {@link #setSpanNameExtractor(UnaryOperator)} instead.
+   */
+  @Deprecated
   @CanIgnoreReturnValue
   public RatpackServerTelemetryBuilder setSpanNameExtractor(
       Function<SpanNameExtractor<Request>, SpanNameExtractor<Request>> serverSpanNameExtractor) {
+    return setSpanNameExtractor(
+        (UnaryOperator<SpanNameExtractor<Request>>) serverSpanNameExtractor::apply);
+  }
+
+  /** Sets custom server {@link SpanNameExtractor} via transform function. */
+  @CanIgnoreReturnValue
+  public RatpackServerTelemetryBuilder setSpanNameExtractor(
+      UnaryOperator<SpanNameExtractor<Request>> serverSpanNameExtractor) {
     builder.setSpanNameExtractor(serverSpanNameExtractor);
     return this;
   }
diff --git a/instrumentation/restlet/restlet-1.1/library/src/main/java/io/opentelemetry/instrumentation/restlet/v1_1/RestletTelemetryBuilder.java b/instrumentation/restlet/restlet-1.1/library/src/main/java/io/opentelemetry/instrumentation/restlet/v1_1/RestletTelemetryBuilder.java
index 7c5b724c342d..a0bc0a16f1cf 100644
--- a/instrumentation/restlet/restlet-1.1/library/src/main/java/io/opentelemetry/instrumentation/restlet/v1_1/RestletTelemetryBuilder.java
+++ b/instrumentation/restlet/restlet-1.1/library/src/main/java/io/opentelemetry/instrumentation/restlet/v1_1/RestletTelemetryBuilder.java
@@ -15,6 +15,7 @@
 import io.opentelemetry.instrumentation.restlet.v1_1.internal.RestletTelemetryBuilderFactory;
 import java.util.Collection;
 import java.util.function.Function;
+import java.util.function.UnaryOperator;
 import org.restlet.data.Request;
 import org.restlet.data.Response;
 
@@ -84,11 +85,24 @@ public RestletTelemetryBuilder setKnownMethods(Collection<String> knownMethods)
     return this;
   }
 
-  /** Sets custom {@link SpanNameExtractor} via transform function. */
+  /**
+   * Sets custom {@link SpanNameExtractor} via transform function.
+   *
+   * @deprecated Use {@link #setSpanNameExtractor(UnaryOperator)} instead.
+   */
+  @Deprecated
   @CanIgnoreReturnValue
   public RestletTelemetryBuilder setSpanNameExtractor(
       Function<SpanNameExtractor<Request>, SpanNameExtractor<Request>>
           spanNameExtractorTransformer) {
+    return setSpanNameExtractor(
+        (UnaryOperator<SpanNameExtractor<Request>>) spanNameExtractorTransformer::apply);
+  }
+
+  /** Sets custom {@link SpanNameExtractor} via transform function. */
+  @CanIgnoreReturnValue
+  public RestletTelemetryBuilder setSpanNameExtractor(
+      UnaryOperator<SpanNameExtractor<Request>> spanNameExtractorTransformer) {
     builder.setSpanNameExtractor(spanNameExtractorTransformer);
     return this;
   }
diff --git a/instrumentation/restlet/restlet-2.0/library/src/main/java/io/opentelemetry/instrumentation/restlet/v2_0/RestletTelemetryBuilder.java b/instrumentation/restlet/restlet-2.0/library/src/main/java/io/opentelemetry/instrumentation/restlet/v2_0/RestletTelemetryBuilder.java
index 17dc6fb88bc8..131709a1294e 100644
--- a/instrumentation/restlet/restlet-2.0/library/src/main/java/io/opentelemetry/instrumentation/restlet/v2_0/RestletTelemetryBuilder.java
+++ b/instrumentation/restlet/restlet-2.0/library/src/main/java/io/opentelemetry/instrumentation/restlet/v2_0/RestletTelemetryBuilder.java
@@ -15,6 +15,7 @@
 import io.opentelemetry.instrumentation.restlet.v2_0.internal.RestletTelemetryBuilderFactory;
 import java.util.Collection;
 import java.util.function.Function;
+import java.util.function.UnaryOperator;
 import org.restlet.Request;
 import org.restlet.Response;
 
@@ -84,11 +85,24 @@ public RestletTelemetryBuilder setKnownMethods(Collection<String> knownMethods)
     return this;
   }
 
-  /** Sets custom {@link SpanNameExtractor} via transform function. */
+  /**
+   * Sets custom {@link SpanNameExtractor} via transform function.
+   *
+   * @deprecated Use {@link #setSpanNameExtractor(UnaryOperator)} instead.
+   */
+  @Deprecated
   @CanIgnoreReturnValue
   public RestletTelemetryBuilder setSpanNameExtractor(
       Function<SpanNameExtractor<Request>, SpanNameExtractor<Request>>
           spanNameExtractorTransformer) {
+    return setSpanNameExtractor(
+        (UnaryOperator<SpanNameExtractor<Request>>) spanNameExtractorTransformer::apply);
+  }
+
+  /** Sets custom {@link SpanNameExtractor} via transform function. */
+  @CanIgnoreReturnValue
+  public RestletTelemetryBuilder setSpanNameExtractor(
+      UnaryOperator<SpanNameExtractor<Request>> spanNameExtractorTransformer) {
     builder.setSpanNameExtractor(spanNameExtractorTransformer);
     return this;
   }
diff --git a/instrumentation/spring/spring-web/spring-web-3.1/library/src/main/java/io/opentelemetry/instrumentation/spring/web/v3_1/SpringWebTelemetryBuilder.java b/instrumentation/spring/spring-web/spring-web-3.1/library/src/main/java/io/opentelemetry/instrumentation/spring/web/v3_1/SpringWebTelemetryBuilder.java
index 1fd6ad36ecf2..16edc0b9a133 100644
--- a/instrumentation/spring/spring-web/spring-web-3.1/library/src/main/java/io/opentelemetry/instrumentation/spring/web/v3_1/SpringWebTelemetryBuilder.java
+++ b/instrumentation/spring/spring-web/spring-web-3.1/library/src/main/java/io/opentelemetry/instrumentation/spring/web/v3_1/SpringWebTelemetryBuilder.java
@@ -15,6 +15,7 @@
 import io.opentelemetry.instrumentation.spring.web.v3_1.internal.WebTelemetryUtil;
 import java.util.Collection;
 import java.util.function.Function;
+import java.util.function.UnaryOperator;
 import org.springframework.http.HttpRequest;
 import org.springframework.http.client.ClientHttpResponse;
 
@@ -75,12 +76,25 @@ public SpringWebTelemetryBuilder setCapturedResponseHeaders(Collection<String> r
     return this;
   }
 
-  /** Sets custom {@link SpanNameExtractor} via transform function. */
+  /**
+   * Sets custom {@link SpanNameExtractor} via transform function.
+   *
+   * @deprecated Use {@link #setSpanNameExtractor(UnaryOperator)} instead.
+   */
+  @Deprecated
   @CanIgnoreReturnValue
   public SpringWebTelemetryBuilder setSpanNameExtractor(
       Function<SpanNameExtractor<HttpRequest>, SpanNameExtractor<HttpRequest>>
           spanNameExtractorTransformer) {
-    builder.setSpanNameExtractor(spanNameExtractorTransformer);
+    return setSpanNameExtractor(
+        (UnaryOperator<SpanNameExtractor<HttpRequest>>) spanNameExtractorTransformer::apply);
+  }
+
+  /** Sets custom {@link SpanNameExtractor} via transform function. */
+  @CanIgnoreReturnValue
+  public SpringWebTelemetryBuilder setSpanNameExtractor(
+      UnaryOperator<SpanNameExtractor<HttpRequest>> spanNameExtractor) {
+    builder.setSpanNameExtractor(spanNameExtractor);
     return this;
   }
 
diff --git a/instrumentation/spring/spring-webflux/spring-webflux-5.3/library/src/main/java/io/opentelemetry/instrumentation/spring/webflux/v5_3/SpringWebfluxClientTelemetryBuilder.java b/instrumentation/spring/spring-webflux/spring-webflux-5.3/library/src/main/java/io/opentelemetry/instrumentation/spring/webflux/v5_3/SpringWebfluxClientTelemetryBuilder.java
index 412887ee6fd5..163505760e05 100644
--- a/instrumentation/spring/spring-webflux/spring-webflux-5.3/library/src/main/java/io/opentelemetry/instrumentation/spring/webflux/v5_3/SpringWebfluxClientTelemetryBuilder.java
+++ b/instrumentation/spring/spring-webflux/spring-webflux-5.3/library/src/main/java/io/opentelemetry/instrumentation/spring/webflux/v5_3/SpringWebfluxClientTelemetryBuilder.java
@@ -16,6 +16,7 @@
 import io.opentelemetry.instrumentation.spring.webflux.v5_3.internal.WebClientHttpAttributesGetter;
 import java.util.Collection;
 import java.util.function.Function;
+import java.util.function.UnaryOperator;
 import org.springframework.web.reactive.function.client.ClientRequest;
 import org.springframework.web.reactive.function.client.ClientResponse;
 
@@ -93,11 +94,24 @@ public SpringWebfluxClientTelemetryBuilder setKnownMethods(Collection<String> kn
     return this;
   }
 
-  /** Sets custom client {@link SpanNameExtractor} via transform function. */
+  /**
+   * Sets custom client {@link SpanNameExtractor} via transform function.
+   *
+   * @deprecated Use {@link #setSpanNameExtractor(UnaryOperator)} instead.
+   */
+  @Deprecated
   @CanIgnoreReturnValue
   public SpringWebfluxClientTelemetryBuilder setSpanNameExtractor(
       Function<SpanNameExtractor<ClientRequest>, SpanNameExtractor<ClientRequest>>
           clientSpanNameExtractor) {
+    return setSpanNameExtractor(
+        (UnaryOperator<SpanNameExtractor<ClientRequest>>) clientSpanNameExtractor::apply);
+  }
+
+  /** Sets custom client {@link SpanNameExtractor} via transform function. */
+  @CanIgnoreReturnValue
+  public SpringWebfluxClientTelemetryBuilder setSpanNameExtractor(
+      UnaryOperator<SpanNameExtractor<ClientRequest>> clientSpanNameExtractor) {
     builder.setSpanNameExtractor(clientSpanNameExtractor);
     return this;
   }
diff --git a/instrumentation/spring/spring-webflux/spring-webflux-5.3/library/src/main/java/io/opentelemetry/instrumentation/spring/webflux/v5_3/SpringWebfluxServerTelemetryBuilder.java b/instrumentation/spring/spring-webflux/spring-webflux-5.3/library/src/main/java/io/opentelemetry/instrumentation/spring/webflux/v5_3/SpringWebfluxServerTelemetryBuilder.java
index c9eb6f9f7fff..aff8906467db 100644
--- a/instrumentation/spring/spring-webflux/spring-webflux-5.3/library/src/main/java/io/opentelemetry/instrumentation/spring/webflux/v5_3/SpringWebfluxServerTelemetryBuilder.java
+++ b/instrumentation/spring/spring-webflux/spring-webflux-5.3/library/src/main/java/io/opentelemetry/instrumentation/spring/webflux/v5_3/SpringWebfluxServerTelemetryBuilder.java
@@ -15,6 +15,7 @@
 import io.opentelemetry.instrumentation.spring.webflux.v5_3.internal.SpringWebfluxBuilderUtil;
 import java.util.Collection;
 import java.util.function.Function;
+import java.util.function.UnaryOperator;
 import org.springframework.web.server.ServerWebExchange;
 
 /** A builder of {@link SpringWebfluxServerTelemetry}. */
@@ -94,11 +95,24 @@ public SpringWebfluxServerTelemetryBuilder setKnownMethods(Collection<String> kn
     return this;
   }
 
-  /** Sets custom server {@link SpanNameExtractor} via transform function. */
+  /**
+   * Sets custom server {@link SpanNameExtractor} via transform function.
+   *
+   * @deprecated Use {@link #setSpanNameExtractor(UnaryOperator)} instead.
+   */
+  @Deprecated
   @CanIgnoreReturnValue
   public SpringWebfluxServerTelemetryBuilder setSpanNameExtractor(
       Function<SpanNameExtractor<ServerWebExchange>, SpanNameExtractor<ServerWebExchange>>
           serverSpanNameExtractor) {
+    return setSpanNameExtractor(
+        (UnaryOperator<SpanNameExtractor<ServerWebExchange>>) serverSpanNameExtractor::apply);
+  }
+
+  /** Sets custom server {@link SpanNameExtractor} via transform function. */
+  @CanIgnoreReturnValue
+  public SpringWebfluxServerTelemetryBuilder setSpanNameExtractor(
+      UnaryOperator<SpanNameExtractor<ServerWebExchange>> serverSpanNameExtractor) {
     builder.setSpanNameExtractor(serverSpanNameExtractor);
     return this;
   }
diff --git a/instrumentation/spring/spring-webmvc/spring-webmvc-5.3/library/src/main/java/io/opentelemetry/instrumentation/spring/webmvc/v5_3/SpringWebMvcTelemetryBuilder.java b/instrumentation/spring/spring-webmvc/spring-webmvc-5.3/library/src/main/java/io/opentelemetry/instrumentation/spring/webmvc/v5_3/SpringWebMvcTelemetryBuilder.java
index 3be0a85c253d..7273a76de512 100644
--- a/instrumentation/spring/spring-webmvc/spring-webmvc-5.3/library/src/main/java/io/opentelemetry/instrumentation/spring/webmvc/v5_3/SpringWebMvcTelemetryBuilder.java
+++ b/instrumentation/spring/spring-webmvc/spring-webmvc-5.3/library/src/main/java/io/opentelemetry/instrumentation/spring/webmvc/v5_3/SpringWebMvcTelemetryBuilder.java
@@ -15,6 +15,7 @@
 import io.opentelemetry.instrumentation.spring.webmvc.v5_3.internal.SpringMvcBuilderUtil;
 import java.util.Collection;
 import java.util.function.Function;
+import java.util.function.UnaryOperator;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
@@ -75,11 +76,24 @@ public SpringWebMvcTelemetryBuilder setCapturedResponseHeaders(
     return this;
   }
 
-  /** Sets custom {@link SpanNameExtractor} via transform function. */
+  /**
+   * Sets custom {@link SpanNameExtractor} via transform function.
+   *
+   * @deprecated Use {@link #setSpanNameExtractor(UnaryOperator)} instead.
+   */
+  @Deprecated
   @CanIgnoreReturnValue
   public SpringWebMvcTelemetryBuilder setSpanNameExtractor(
       Function<SpanNameExtractor<HttpServletRequest>, SpanNameExtractor<HttpServletRequest>>
           spanNameExtractor) {
+    return setSpanNameExtractor(
+        (UnaryOperator<SpanNameExtractor<HttpServletRequest>>) spanNameExtractor::apply);
+  }
+
+  /** Sets custom {@link SpanNameExtractor} via transform function. */
+  @CanIgnoreReturnValue
+  public SpringWebMvcTelemetryBuilder setSpanNameExtractor(
+      UnaryOperator<SpanNameExtractor<HttpServletRequest>> spanNameExtractor) {
     builder.setSpanNameExtractor(spanNameExtractor);
     return this;
   }
diff --git a/instrumentation/spring/spring-webmvc/spring-webmvc-6.0/library/src/main/java/io/opentelemetry/instrumentation/spring/webmvc/v6_0/SpringWebMvcTelemetryBuilder.java b/instrumentation/spring/spring-webmvc/spring-webmvc-6.0/library/src/main/java/io/opentelemetry/instrumentation/spring/webmvc/v6_0/SpringWebMvcTelemetryBuilder.java
index 95e6537502ac..4604dff9e99a 100644
--- a/instrumentation/spring/spring-webmvc/spring-webmvc-6.0/library/src/main/java/io/opentelemetry/instrumentation/spring/webmvc/v6_0/SpringWebMvcTelemetryBuilder.java
+++ b/instrumentation/spring/spring-webmvc/spring-webmvc-6.0/library/src/main/java/io/opentelemetry/instrumentation/spring/webmvc/v6_0/SpringWebMvcTelemetryBuilder.java
@@ -17,6 +17,7 @@
 import jakarta.servlet.http.HttpServletResponse;
 import java.util.Collection;
 import java.util.function.Function;
+import java.util.function.UnaryOperator;
 
 /** A builder of {@link SpringWebMvcTelemetry}. */
 public final class SpringWebMvcTelemetryBuilder {
@@ -74,11 +75,24 @@ public SpringWebMvcTelemetryBuilder setCapturedResponseHeaders(
     return this;
   }
 
-  /** Sets custom {@link SpanNameExtractor} via transform function. */
+  /**
+   * Sets custom {@link SpanNameExtractor} via transform function.
+   *
+   * @deprecated Use {@link #setSpanNameExtractor(UnaryOperator)} instead.
+   */
+  @Deprecated
   @CanIgnoreReturnValue
   public SpringWebMvcTelemetryBuilder setSpanNameExtractor(
       Function<SpanNameExtractor<HttpServletRequest>, SpanNameExtractor<HttpServletRequest>>
           spanNameExtractor) {
+    return setSpanNameExtractor(
+        (UnaryOperator<SpanNameExtractor<HttpServletRequest>>) spanNameExtractor::apply);
+  }
+
+  /** Sets custom {@link SpanNameExtractor} via transform function. */
+  @CanIgnoreReturnValue
+  public SpringWebMvcTelemetryBuilder setSpanNameExtractor(
+      UnaryOperator<SpanNameExtractor<HttpServletRequest>> spanNameExtractor) {
     builder.setSpanNameExtractor(spanNameExtractor);
     return this;
   }