| /* |
| * 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.commons.proxy.factory.util; |
| |
| import java.lang.reflect.Method; |
| import java.lang.reflect.Modifier; |
| import java.util.Collection; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.Map; |
| import java.util.Set; |
| |
| /** |
| * A useful superclass for {@link ProxyClassGenerator} implementations. |
| * |
| * @author James Carman |
| * @since 1.0 |
| */ |
| public abstract class AbstractProxyClassGenerator implements ProxyClassGenerator |
| { |
| //********************************************************************************************************************** |
| // Static Methods |
| //********************************************************************************************************************** |
| |
| /** |
| * Returns all methods that a proxy class must implement from the proxy interfaces. This method makes sure there |
| * are no method signature clashes. For methods with the same signature (name and parameter types), the one |
| * encountered first will be returned in the result. Final methods are also excluded from the result. |
| * |
| * @param proxyClasses the interfaces the proxy class must implement |
| * @return all methods that the proxy class must implement |
| */ |
| public static Method[] getImplementationMethods( Class[] proxyClasses ) |
| { |
| final Map signatureMethodMap = new HashMap(); |
| final Set finalizedSignatures = new HashSet(); |
| for( int i = 0; i < proxyClasses.length; i++ ) |
| { |
| Class proxyInterface = proxyClasses[i]; |
| final Method[] methods = proxyInterface.getMethods(); |
| for( int j = 0; j < methods.length; j++ ) |
| { |
| final MethodSignature signature = new MethodSignature(methods[j]); |
| if( Modifier.isFinal(methods[j].getModifiers()) ) |
| { |
| finalizedSignatures.add(signature); |
| } |
| else if( !signatureMethodMap.containsKey(signature) ) |
| { |
| signatureMethodMap.put(signature, methods[j]); |
| } |
| } |
| } |
| final Collection resultingMethods = signatureMethodMap.values(); |
| for( Iterator i = finalizedSignatures.iterator(); i.hasNext(); ) |
| { |
| MethodSignature signature = ( MethodSignature ) i.next(); |
| resultingMethods.remove(signatureMethodMap.get(signature)); |
| } |
| return ( Method[] ) resultingMethods.toArray(new Method[resultingMethods.size()]); |
| } |
| } |
| |