/**
* Copyright [2013] [www.cuubez.com]
* 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 com.cuubez.core.resource;
import com.cuubez.core.resource.metaData.ClassMetaData;
import com.cuubez.core.resource.metaData.MethodMetaData;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import javax.ws.rs.*;
public class ResourceMetaDataScanner {
public ClassMetaData scanClass(Class<?> clazz) {
ClassMetaData classMetaData = new ClassMetaData();
scanPath(clazz, classMetaData);
scanConsume(clazz, classMetaData);
scanProduce(clazz, classMetaData);
classMetaData.setClazz(clazz);
return classMetaData;
}
public MethodMetaData scanMethods(Class<?> clazz, Method method) {
int modifier = method.getModifiers();
if (Modifier.isStatic(modifier) || !Modifier.isPublic(modifier)) {
return null;
}
MethodMetaData methodMetaData = new MethodMetaData();
methodMetaData.setReflectionMethod(method);
if (!scanHttpMethod(methodMetaData, method)) {
return null;
}
scanPath(methodMetaData, method);
scanConsume(methodMetaData, method);
scanProduce(methodMetaData, method);
methodMetaData.setClazz(clazz);
return methodMetaData;
}
public static boolean isResource(Class<?> cls) {
if (Modifier.isInterface(cls.getModifiers()) || Modifier.isAbstract(cls.getModifiers())) {
return false;
}
if (cls.getAnnotation(Path.class) != null) {
return true;
}
Class<?> declaringClass = cls;
while (!declaringClass.equals(Object.class)) {
// try a superclass
Class<?> superclass = declaringClass.getSuperclass();
if (superclass.getAnnotation(Path.class) != null) {
return true;
}
// try interfaces
Class<?>[] interfaces = declaringClass.getInterfaces();
for (Class<?> interfaceClass : interfaces) {
if (interfaceClass.getAnnotation(Path.class) != null) {
return true;
}
}
declaringClass = declaringClass.getSuperclass();
}
return false;
}
public static boolean isSubResource(Method method) {
if (method.getAnnotation(GET.class) != null ||
method.getAnnotation(POST.class) != null || method.getAnnotation(PUT.class) != null || method.getAnnotation(DELETE.class) != null) {
return true;
}
return false;
}
private boolean scanPath(MethodMetaData methodMetaData, Method method) {
Path path = method.getAnnotation(Path.class);
if (path != null) {
methodMetaData.setPath(normalizePath(path.value()));
return true;
}
return false;
}
private boolean scanPath(Class<?> clazz, ClassMetaData classMetaData) {
Path path = clazz.getAnnotation(Path.class);
if (path != null) {
classMetaData.setPath(normalizePath(path.value()));
return true;
}
if (!clazz.equals(Object.class)) {
Class<?> superClass = clazz.getSuperclass();
Path superClassPath = superClass.getAnnotation(Path.class);
if(superClassPath != null) {
classMetaData.setPath(normalizePath(superClassPath.value()));
return true;
}
Class<?>[] interfaces = clazz.getInterfaces();
for(Class<?> intface : interfaces) {
Path interfacePath = intface.getAnnotation(Path.class);
if(interfacePath != null) {
classMetaData.setPath(normalizePath(interfacePath.value()));
return true;
}
}
}
return false;
}
private boolean scanProduce(MethodMetaData methodMetaData, Method method) {
Produces produce = method.getAnnotation(Produces.class);
if (produce != null) {
methodMetaData.setProduce(produce.value());
return true;
}
return false;
}
private boolean scanHttpMethod(MethodMetaData methodMetaData, Method method) {
GET get = method.getAnnotation(GET.class);
if (get != null) {
methodMetaData.setHttpMethod(HttpMethod.GET);
return true;
}
POST post = method.getAnnotation(POST.class);
if (post != null) {
methodMetaData.setHttpMethod(HttpMethod.POST);
return true;
}
PUT put = method.getAnnotation(PUT.class);
if (put != null) {
methodMetaData.setHttpMethod(HttpMethod.PUT);
return true;
}
DELETE delete = method.getAnnotation(DELETE.class);
if (delete != null) {
methodMetaData.setHttpMethod(HttpMethod.DELETE);
return true;
}
return false;
}
private boolean scanProduce(Class<?> clazz, ClassMetaData classMetaData) {
Produces produce = clazz.getAnnotation(Produces.class);
if(produce != null) {
classMetaData.setProduce(produce.value());
return true;
}
return false;
}
private boolean scanConsume(MethodMetaData methodMetaData, Method method) {
Consumes consume = method.getAnnotation(Consumes.class);
if (consume != null) {
methodMetaData.setConsume(consume.value());
return true;
}
return false;
}
private boolean scanConsume(Class<?> clazz, ClassMetaData classMetaData) {
Consumes consume = clazz.getAnnotation(Consumes.class);
if (consume != null) {
classMetaData.setConsume(consume.value());
return true;
}
return false;
}
private String normalizePath(String path) {
if(!path.startsWith("/")) {
path = "/".concat(path);
}
return path;
}
}