Issue 36: Collection handling and deserializers for JSON-HAL

.gitignore

@@ -1,4 +1,5 @@
 target/
+test-output/
 .settings/
 .project
 .classpath

src/main/java/org/springframework/hateoas/hal/AnnotationBasedRelationResolver.java

@@ -0,0 +1,24 @@
+package org.springframework.hateoas.hal;
+
+
+import org.springframework.hateoas.Resource;
+
+public class AnnotationBasedRelationResolver implements RelationResolver {
+
+	@SuppressWarnings("rawtypes")
+	@Override
+	public String getResourceRelation(Object resource) {
+
+		// check for hateoas wrapper type
+		if (Resource.class.isInstance(resource)) {
+			resource = ((Resource) resource).getContent();
+		}
+
+		HateoasRelation annotation = resource.getClass().getAnnotation(HateoasRelation.class);
+		if (annotation == null || HateoasRelation.NO_RELATION.equals(annotation.value())) {
+			return null;
+		}
+		return annotation.value();
+	}
+
+}

src/main/java/org/springframework/hateoas/hal/HateoasRelation.java

@@ -0,0 +1,16 @@
+package org.springframework.hateoas.hal;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Target({ ElementType.TYPE, ElementType.FIELD, ElementType.METHOD, ElementType.ANNOTATION_TYPE })
+@Retention(RetentionPolicy.RUNTIME)
+public @interface HateoasRelation {
+
+	public static final String NO_RELATION = "";
+
+	String value() default NO_RELATION;
+
+}