Override hashCode when equals overridden

Java 8 added a warning for this:

https://bugs.openjdk.java.net/browse/JDK-6563143

compute/src/main/java/org/jclouds/compute/predicates/ImagePredicates.java

@@ -52,6 +52,10 @@ public class ImagePredicates {
          return obj instanceof Is64BitPredicate;
       }
 
+      @Override
+      public int hashCode() {
+         return 0;
+      }
    }
 
    /**

core/src/test/java/org/jclouds/json/GsonExperimentsTest.java

@@ -30,6 +30,7 @@ import java.util.concurrent.atomic.AtomicReference;
 import org.testng.annotations.BeforeTest;
 import org.testng.annotations.Test;
 
+import com.google.common.base.Objects;
 import com.google.common.base.Optional;
 import com.google.common.collect.Lists;
 import com.google.common.util.concurrent.Atomics;
@@ -132,6 +133,11 @@ public class GsonExperimentsTest {
             return false;
          }
       }
+
+      @Override
+      public int hashCode() {
+         return Objects.hashCode(present, notPresent);
+      }
    }
 
    public void testPersistOptional() {

core/src/test/java/org/jclouds/json/internal/DeserializationConstructorAndReflectiveTypeAdapterFactoryTest.java

@@ -138,6 +138,11 @@ public final class DeserializationConstructorAndReflectiveTypeAdapterFactoryTest
          ValidatedConstructor other = ValidatedConstructor.class.cast(obj);
          return other != null && Objects.equal(foo, other.foo) && Objects.equal(bar, other.bar);
       }
+
+      @Override
+      public int hashCode() {
+         return Objects.hashCode(foo, bar);
+      }
    }
 
     @Test(expectedExceptions = IllegalArgumentException.class, expectedExceptionsMessageRegExp = "absent!")
@@ -193,6 +198,11 @@ public final class DeserializationConstructorAndReflectiveTypeAdapterFactoryTest
          RenamedFields other = RenamedFields.class.cast(obj);
          return other != null && Objects.equal(foo, other.foo) && Objects.equal(bar, other.bar);
       }
+
+      @Override
+      public int hashCode() {
+         return Objects.hashCode(foo, bar);
+      }
    }
 
    public void testCanOverrideDefault() throws IOException {
@@ -222,6 +232,11 @@ public final class DeserializationConstructorAndReflectiveTypeAdapterFactoryTest
          ComposedObjects other = ComposedObjects.class.cast(obj);
          return other != null && Objects.equal(x, other.x) && Objects.equal(y, other.y);
       }
+
+      @Override
+      public int hashCode() {
+         return Objects.hashCode(x, y);
+      }
    }
 
    public void checkSimpleComposedObject() throws IOException {

core/src/test/java/org/jclouds/json/internal/OptionalTypeAdapterFactoryTest.java

@@ -67,6 +67,11 @@ public class OptionalTypeAdapterFactoryTest {
          SimpleBean that = SimpleBean.class.cast(other);
          return Objects.equal(value, that.value) && Objects.equal(someOtherValue, that.someOtherValue);
       }
+
+      @Override
+      public int hashCode() {
+         return Objects.hashCode(value, someOtherValue);
+      }
    }
 
    // register the type adapter so that gson can serialize/deserialize to it