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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.tuscany.sca.interfacedef.java.jaxrs;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.ws.rs.DELETE;
import javax.ws.rs.GET;
import javax.ws.rs.HEAD;
import javax.ws.rs.HttpMethod;
import javax.ws.rs.OPTIONS;
import javax.ws.rs.POST;
import javax.ws.rs.PUT;
import org.apache.tuscany.sca.interfacedef.InvalidInterfaceException;
import org.apache.tuscany.sca.interfacedef.Operation;
import org.apache.tuscany.sca.interfacedef.java.JavaInterface;
import org.apache.tuscany.sca.interfacedef.java.JavaOperation;
import org.apache.tuscany.sca.interfacedef.java.introspect.JavaInterfaceVisitor;
public class JAXRSJavaInterfaceProcessor implements JavaInterfaceVisitor {
private static Map<String, Class<?>> mapping = new HashMap<String, Class<?>>();
static {
mapping.put(HttpMethod.GET, GET.class);
mapping.put(HttpMethod.POST, POST.class);
mapping.put(HttpMethod.PUT, PUT.class);
mapping.put(HttpMethod.DELETE, DELETE.class);
mapping.put(HttpMethod.HEAD, HEAD.class);
mapping.put(HttpMethod.OPTIONS, OPTIONS.class);
}
private boolean introspectHTTPMethod(JavaOperation operation) {
Method method = operation.getJavaMethod();
String methodName = null;
/**
* A request method designator is a runtime annotation that is annotated with the @HttpMethod annotation.
* JAX-RS defines a set of request method designators for the common HTTP methods: @GET, @POST, @PUT,
* @DELETE, @HEAD. Users may define their own custom request method designators including alternate
* designators for the common HTTP methods.
*/
for (Annotation a : method.getAnnotations()) {
Class<?> annotationType = a.annotationType();
if (annotationType == HttpMethod.class) {
methodName = ((HttpMethod)a).value();
break;
}
// Http method related annotations such as @GET, @POST will have itself annotated with
// @HttpMethod
HttpMethod m = a.annotationType().getAnnotation(HttpMethod.class);
if (m != null) {
methodName = m.value();
break;
}
}
boolean jaxrs = false;
Class<?> type = mapping.get(methodName);
if (type != null) {
jaxrs = true;
operation.getAttributes().put(type, Boolean.TRUE);
Map<Object, Object> attrs = operation.getInterface().getAttributes();
List<Operation> operations = (List<Operation>)attrs.get(type);
if (operations == null) {
operations = new ArrayList<Operation>();
attrs.put(type, operations);
operations.add(operation);
} else {
operations.add(operation);
}
}
return jaxrs;
}
public void visitInterface(JavaInterface contract) throws InvalidInterfaceException {
boolean hasJAXRSAnnotarions = false;
for (Operation op : contract.getOperations()) {
final JavaOperation operation = (JavaOperation)op;
if (introspectHTTPMethod(operation)) {
hasJAXRSAnnotarions = true;
}
}
// Always set JAX-RS annotated interfaces as remotables
if (hasJAXRSAnnotarions) {
contract.setRemotable(true);
}
}
}
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