#51 - Added HalLinkDiscoverer.

Added LinkDiscoverer implementation that discovers Links from HAL style representations. Extracted AbstractLinkDiscovererUnitTest to define expected behavior for LinkDiscoverers in general.

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

@@ -0,0 +1,31 @@
+/*
+ * Copyright 2013 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.hateoas.hal;
+
+import org.springframework.hateoas.LinkDiscoverer;
+import org.springframework.hateoas.core.JsonPathLinkDiscoverer;
+
+/**
+ * {@link LinkDiscoverer} implementation based on HAL link structure.
+ * 
+ * @author Oliver Gierke
+ */
+public class HalLinkDiscoverer extends JsonPathLinkDiscoverer {
+
+	public HalLinkDiscoverer() {
+		super("$_links..%s.href");
+	}
+}