Fix #2446

Author: cowtowncoder

release-notes/CREDITS-2.x

@@ -930,3 +930,8 @@ Hesham Massoud (heshamMassoud@github)
   * Reported, contributed fix for #2442: `ArrayNode.addAll()` adds raw `null` values
     which cause NPE on `deepCopy()`
    (2.10.0)
+
+David Connelly (dconnelly@github)
+  * Reported#2446: Java 11: Unable to load JDK7 types (annotations, java.nio.file.Path):
+    no Java7 support added
+   (2.10.0)

release-notes/VERSION-2.x

@@ -37,6 +37,8 @@ Project: jackson-databind
 #2442: `ArrayNode.addAll()` adds raw `null` values which cause NPE on `deepCopy()`
   and `toString()`
  (reported, fix contributed by Hesham M)
+#2446: Java 11: Unable to load JDK7 types (annotations, java.nio.file.Path): no Java7 support added
+ (reported by David C)
 
 2.10.0.pr1 (19-Jul-2019)
 

src/main/java/com/fasterxml/jackson/databind/ext/Java7Handlers.java

@@ -0,0 +1,43 @@
+package com.fasterxml.jackson.databind.ext;
+
+import com.fasterxml.jackson.databind.JsonDeserializer;
+import com.fasterxml.jackson.databind.JsonSerializer;
+import com.fasterxml.jackson.databind.util.ClassUtil;
+
+/**
+ * To support Java7-incomplete platforms, we will offer support for JDK 7
+ * datatype(s) (that is, {@link java.nio.file.Path} through this class, loaded
+ * dynamically; if loading fails, support will be missing.
+ * This class is the non-JDK-7-dependent API, and {@link Java7HandlersImpl} is
+ * JDK7-dependent implementation of functionality.
+ *
+ * @since 2.10 (cleaved off of {@link Java7Support})
+ */
+public abstract class Java7Handlers
+{
+    private final static Java7Handlers IMPL;
+
+    static {
+        Java7Handlers impl = null;
+        try {
+            Class<?> cls = Class.forName("com.fasterxml.jackson.databind.ext.Java7HandlersImpl");
+            impl = (Java7Handlers) ClassUtil.createInstance(cls, false);
+        } catch (Throwable t) {
+            // 09-Sep-2019, tatu: Could choose not to log this, but since this is less likely
+            //    to miss (than annotations), do it
+            java.util.logging.Logger.getLogger(Java7Handlers.class.getName())
+                .warning("Unable to load JDK7 types (java.nio.file.Path): no Java7 type support added");
+        }
+        IMPL = impl;
+    }
+
+    public static Java7Handlers instance() {
+        return IMPL;
+    }
+
+    public abstract Class<?> getClassJavaNioFilePath();
+
+    public abstract JsonDeserializer<?> getDeserializerForJavaNioFilePath(Class<?> rawType);
+
+    public abstract JsonSerializer<?> getSerializerForJavaNioFilePath(Class<?> rawType);
+}

src/main/java/com/fasterxml/jackson/databind/ext/Java7HandlersImpl.java

@@ -0,0 +1,33 @@
+package com.fasterxml.jackson.databind.ext;
+
+import java.nio.file.Path;
+
+import com.fasterxml.jackson.databind.JsonDeserializer;
+import com.fasterxml.jackson.databind.JsonSerializer;
+
+/**
+ * @since 2.10
+ */
+public class Java7HandlersImpl extends Java7Handlers
+{
+    @Override
+    public Class<?> getClassJavaNioFilePath() {
+        return Path.class;
+    }
+
+    @Override
+    public JsonDeserializer<?> getDeserializerForJavaNioFilePath(Class<?> rawType) {
+        if (rawType == Path.class) {
+            return new NioPathDeserializer();
+        }
+        return null;
+    }
+
+    @Override
+    public JsonSerializer<?> getSerializerForJavaNioFilePath(Class<?> rawType) {
+        if (Path.class.isAssignableFrom(rawType)) {
+            return new NioPathSerializer();
+        }
+        return null;
+    }
+}

src/main/java/com/fasterxml/jackson/databind/ext/Java7Support.java

@@ -1,7 +1,5 @@
 package com.fasterxml.jackson.databind.ext;
 
-import com.fasterxml.jackson.databind.JsonDeserializer;
-import com.fasterxml.jackson.databind.JsonSerializer;
 import com.fasterxml.jackson.databind.PropertyName;
 import com.fasterxml.jackson.databind.introspect.Annotated;
 import com.fasterxml.jackson.databind.introspect.AnnotatedParameter;
@@ -17,16 +15,16 @@
 public abstract class Java7Support
 {
     private final static Java7Support IMPL;
-    
+
     static {
         Java7Support impl = null;
         try {
             Class<?> cls = Class.forName("com.fasterxml.jackson.databind.ext.Java7SupportImpl");
             impl = (Java7Support) ClassUtil.createInstance(cls, false);
         } catch (Throwable t) {
-            // 24-Nov-2015, tatu: Should we log or not?
-            java.util.logging.Logger.getLogger(Java7Support.class.getName())
-                .warning("Unable to load JDK7 types (annotations, java.nio.file.Path): no Java7 support added");
+            // 09-Sep-2019, tatu: Used to log earlier, but with 2.10.0 let's not log
+//            java.util.logging.Logger.getLogger(Java7Support.class.getName())
+//                .warning("Unable to load JDK7 annotations (@ConstructorProperties, @Transient): no Java7 annotation support added");
         }
         IMPL = impl;
     }
@@ -40,10 +38,4 @@ public static Java7Support instance() {
     public abstract Boolean hasCreatorAnnotation(Annotated a);
 
     public abstract PropertyName findConstructorName(AnnotatedParameter p);
-
-    public abstract Class<?> getClassJavaNioFilePath();
-
-    public abstract JsonDeserializer<?> getDeserializerForJavaNioFilePath(Class<?> rawType);
-
-    public abstract JsonSerializer<?> getSerializerForJavaNioFilePath(Class<?> rawType);
 }

src/main/java/com/fasterxml/jackson/databind/ext/Java7SupportImpl.java

@@ -2,10 +2,7 @@
 
 import java.beans.ConstructorProperties;
 import java.beans.Transient;
-import java.nio.file.Path;
 
-import com.fasterxml.jackson.databind.JsonDeserializer;
-import com.fasterxml.jackson.databind.JsonSerializer;
 import com.fasterxml.jackson.databind.PropertyName;
 import com.fasterxml.jackson.databind.introspect.Annotated;
 import com.fasterxml.jackson.databind.introspect.AnnotatedParameter;
@@ -26,27 +23,6 @@ public Java7SupportImpl() {
         _bogus = cls;
     }
 
-    @Override
-    public Class<?> getClassJavaNioFilePath() {
-        return Path.class;
-    }
-
-    @Override
-    public JsonDeserializer<?> getDeserializerForJavaNioFilePath(Class<?> rawType) {
-        if (rawType == Path.class) {
-            return new NioPathDeserializer();
-        }
-        return null;
-    }
-
-    @Override
-    public JsonSerializer<?> getSerializerForJavaNioFilePath(Class<?> rawType) {
-        if (Path.class.isAssignableFrom(rawType)) {
-            return new NioPathSerializer();
-        }
-        return null;
-    }
-
     @Override
     public Boolean findTransient(Annotated a) {
         Transient t = a.getAnnotation(Transient.class);

src/main/java/com/fasterxml/jackson/databind/ext/OptionalHandlerFactory.java

@@ -64,11 +64,11 @@ public class OptionalHandlerFactory implements java.io.Serializable
     // // (note: also assume it comes from JDK so that ClassLoader issues with OSGi
     // // can, I hope, be avoided?)
 
-    private static final Java7Support _jdk7Helper;
+    private static final Java7Handlers _jdk7Helper;
     static {
-        Java7Support x = null;
+        Java7Handlers x = null;
         try {
-            x = Java7Support.instance();
+            x = Java7Handlers.instance();
         } catch (Throwable t) { }
         _jdk7Helper = x;
     }
@@ -88,15 +88,17 @@ public JsonSerializer<?> findSerializer(SerializationConfig config, JavaType typ
     {
         final Class<?> rawType = type.getRawClass();
 
+        if ((CLASS_DOM_NODE != null) && CLASS_DOM_NODE.isAssignableFrom(rawType)) {
+            return (JsonSerializer<?>) instantiate(SERIALIZER_FOR_DOM_NODE);
+        }
+
         if (_jdk7Helper != null) {
             JsonSerializer<?> ser = _jdk7Helper.getSerializerForJavaNioFilePath(rawType);
             if (ser != null) {
                 return ser;
             }
         }
-        if ((CLASS_DOM_NODE != null) && CLASS_DOM_NODE.isAssignableFrom(rawType)) {
-            return (JsonSerializer<?>) instantiate(SERIALIZER_FOR_DOM_NODE);
-        }
+
         String className = rawType.getName();
         String factoryName;
         if (className.startsWith(PACKAGE_PREFIX_JAVAX_XML) || hasSuperClassStartingWith(rawType, PACKAGE_PREFIX_JAVAX_XML)) {