001 /** 002 * 003 * Copyright 2005 LogicBlaze, Inc. 004 * 005 * Licensed under the Apache License, Version 2.0 (the "License"); 006 * you may not use this file except in compliance with the License. 007 * You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 * 017 **/ 018 package org.logicblaze.lingo; 019 020 import org.springframework.remoting.support.RemoteInvocationFactory; 021 import org.springframework.remoting.support.RemoteInvocation; 022 import org.aopalliance.intercept.MethodInvocation; 023 024 import java.util.Map; 025 import java.util.HashMap; 026 import java.lang.reflect.Method; 027 028 /** 029 * A factory of remote invocation instances which includes the extra 030 * Lingo metadata. 031 * 032 * @version $Revision: 1.1 $ 033 */ 034 public class LingoRemoteInvocationFactory implements RemoteInvocationFactory { 035 private static final MethodMetadata DEFAULT_METHOD_METADATA = new MethodMetadata(false); 036 037 private MetadataStrategy metadataStrategy; 038 private Map cache = new HashMap(); 039 040 public LingoRemoteInvocationFactory(MetadataStrategy metadataStrategy) { 041 this.metadataStrategy = metadataStrategy; 042 } 043 044 public RemoteInvocation createRemoteInvocation(MethodInvocation methodInvocation) { 045 MethodMetadata metadata = getMethodMetadata(methodInvocation); 046 return new LingoInvocation(methodInvocation, metadata); 047 } 048 049 protected synchronized MethodMetadata getMethodMetadata(MethodInvocation methodInvocation) { 050 Method method = methodInvocation.getMethod(); 051 MethodMetadata answer = (MethodMetadata) cache.get(method); 052 if (answer == null) { 053 if (metadataStrategy == null) { 054 // TODO we could use a singleton here 055 answer = DEFAULT_METHOD_METADATA; 056 } 057 else { 058 answer = metadataStrategy.getMethodMetadata(method); 059 } 060 cache.put(method, answer); 061 } 062 return answer; 063 } 064 065 }