DATAREST-385 - Projection definition configurations are now detected for super types.

Projections defined for a parent type are now also available for sub-types.

spring-data-rest-core/src/main/java/org/springframework/data/rest/core/config/ProjectionDefinitionConfiguration.java

@@ -124,7 +124,7 @@ public class ProjectionDefinitionConfiguration implements ProjectionDefinitions
 	 */
 	@Override
 	public Class<?> getProjectionType(Class<?> sourceType, String name) {
-		return projectionDefinitions.get(new ProjectionDefinitionKey(sourceType, name));
+		return getProjectionsFor(sourceType).get(name);
 	}
 
 	/* 
@@ -135,7 +135,7 @@ public class ProjectionDefinitionConfiguration implements ProjectionDefinitions
 	public boolean hasProjectionFor(Class<?> sourceType) {
 
 		for (ProjectionDefinitionKey key : projectionDefinitions.keySet()) {
-			if (key.sourceType.equals(sourceType)) {
+			if (key.sourceType.isAssignableFrom(sourceType)) {
 				return true;
 			}
 		}
@@ -156,7 +156,7 @@ public class ProjectionDefinitionConfiguration implements ProjectionDefinitions
 		Map<String, Class<?>> result = new HashMap<String, Class<?>>();
 
 		for (Entry<ProjectionDefinitionKey, Class<?>> entry : projectionDefinitions.entrySet()) {
-			if (entry.getKey().sourceType.equals(sourceType)) {
+			if (entry.getKey().sourceType.isAssignableFrom(sourceType)) {
 				result.put(entry.getKey().name, entry.getValue());
 			}
 		}

spring-data-rest-core/src/test/java/org/springframework/data/rest/core/config/ProjectionDefinitionConfigurationUnitTests.java

@@ -135,6 +135,21 @@ public class ProjectionDefinitionConfigurationUnitTests {
 		assertThat(objectOtherNameKey, is(not(objectNameKey)));
 	}
 
+	/**
+	 * @see DATAREST-385
+	 */
+	@Test
+	public void returnsProjectionForParentClass() {
+
+		ProjectionDefinitionConfiguration configuration = new ProjectionDefinitionConfiguration();
+		configuration.addProjection(ParentProjection.class);
+
+		assertThat(configuration.hasProjectionFor(Child.class), is(true));
+		assertThat(configuration.getProjectionsFor(Child.class).values(), hasItem(ParentProjection.class));
+		assertThat(configuration.getProjectionType(Child.class, "parentProjection"),
+				is(typeCompatibleWith(ParentProjection.class)));
+	}
+
 	@Projection(name = "name", types = Integer.class)
 	interface SampleProjection {
 
@@ -144,4 +159,11 @@ public class ProjectionDefinitionConfigurationUnitTests {
 	interface Default {
 
 	}
+
+	class Parent {}
+
+	class Child extends Parent {}
+
+	@Projection(types = Parent.class)
+	interface ParentProjection {}
 }