fix: equals and hashcode of several classes

Signed-off-by: christian.lutnik <[email protected]>

Author: chrfwow

src/main/java/dev/openfeature/sdk/ImmutableMetadata.java

@@ -101,7 +101,6 @@ public boolean isEmpty() {
         return metadata.isEmpty();
     }
 
-
     public boolean equals(final Object o) {
         if (o == this) {
             return true;

src/main/java/dev/openfeature/sdk/MutableContext.java

@@ -5,9 +5,7 @@
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
-import java.util.Objects;
 import java.util.function.Function;
-import lombok.EqualsAndHashCode;
 import lombok.ToString;
 import lombok.experimental.Delegate;
 

src/main/java/dev/openfeature/sdk/Value.java

@@ -315,6 +315,11 @@ public static Value objectToValue(Object object) {
         }
     }
 
+    /**
+     * Returns true iff {@code this} is equal to {@code o}, or if both objects represent the same data.
+     * @param o the other object
+     * @return true iff both objects are equal or represent the same data
+     */
     public boolean equals(final Object o) {
         if (o == this) {
             return true;
@@ -326,6 +331,10 @@ public boolean equals(final Object o) {
         return innerObject.equals(other.innerObject);
     }
 
+    /**
+     * Returns the `hashCode` of the underlying data, or 0 if {@link Value#isNull()} returns true.
+     * @return the hash code
+     */
     public int hashCode() {
         if (innerObject == null) {
             return 0;

src/test/java/dev/openfeature/sdk/ImmutableMetadataTest.java

@@ -8,16 +8,20 @@
 class ImmutableMetadataTest {
     @Test
     void unequalImmutableMetadataAreUnequal() {
-        ImmutableMetadata i1 = ImmutableMetadata.builder().addString("key1", "value1").build();
-        ImmutableMetadata i2 = ImmutableMetadata.builder().addString("key1", "value2").build();
+        ImmutableMetadata i1 =
+                ImmutableMetadata.builder().addString("key1", "value1").build();
+        ImmutableMetadata i2 =
+                ImmutableMetadata.builder().addString("key1", "value2").build();
 
         assertNotEquals(i1, i2);
     }
 
     @Test
     void equalImmutableMetadataAreEqual() {
-        ImmutableMetadata i1 = ImmutableMetadata.builder().addString("key1", "value1").build();
-        ImmutableMetadata i2 = ImmutableMetadata.builder().addString("key1", "value1").build();
+        ImmutableMetadata i1 =
+                ImmutableMetadata.builder().addString("key1", "value1").build();
+        ImmutableMetadata i2 =
+                ImmutableMetadata.builder().addString("key1", "value1").build();
 
         assertEquals(i1, i2);
     }

src/test/java/dev/openfeature/sdk/ValueTest.java

@@ -7,7 +7,6 @@
 import static org.junit.jupiter.api.Assertions.assertTrue;
 import static org.junit.jupiter.api.Assertions.fail;
 
-import java.lang.reflect.Modifier;
 import java.time.Instant;
 import java.util.ArrayList;
 import java.util.List;