java: append getter methods for element templates in org.msgpack.template.ListTemplate.java, MapTemplate.java and OptionalTemplate.java

java/src/main/java/org/msgpack/template/ListTemplate.java

@@ -29,6 +29,10 @@ public class ListTemplate implements Template {
 		this.elementTemplate = elementTemplate;
 	}
 
+	public Template getElementTemplate() {
+		return elementTemplate;
+	}
+
 	public Object unpack(Unpacker pac) throws IOException, MessageTypeException {
 		int length = pac.unpackArray();
 		List<Object> list = new ArrayList<Object>(length);

java/src/main/java/org/msgpack/template/MapTemplate.java

@@ -31,6 +31,14 @@ public class MapTemplate implements Template {
 		this.valueTemplate = valueTemplate;
 	}
 
+	public Template getKeyTemplate() {
+		return keyTemplate;
+	}
+
+	public Template getValueTemplate() {
+		return valueTemplate;
+	}
+
 	public Object unpack(Unpacker pac) throws IOException, MessageTypeException {
 		int length = pac.unpackMap();
 		Map<Object,Object> map = new HashMap<Object,Object>(length);

java/src/main/java/org/msgpack/template/OptionalTemplate.java

@@ -28,6 +28,10 @@ public class OptionalTemplate implements Template {
 		this(elementTemplate, null);
 	}
 
+	public Template getElementTemplate() {
+		return elementTemplate;
+	}
+
 	public OptionalTemplate(Template elementTemplate, Object defaultObject) {
 		this.elementTemplate = elementTemplate;
 		this.defaultObject = defaultObject;