1 /***
2 *
3 * Copyright 2005 LogicBlaze, Inc.
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 **/
18 package org.logicblaze.lingo;
19
20 import org.springframework.remoting.support.RemoteInvocationFactory;
21 import org.springframework.remoting.support.RemoteInvocation;
22 import org.aopalliance.intercept.MethodInvocation;
23
24 import java.util.Map;
25 import java.util.HashMap;
26 import java.lang.reflect.Method;
27
28 /***
29 * A factory of remote invocation instances which includes the extra
30 * Lingo metadata.
31 *
32 * @version $Revision: 1.1 $
33 */
34 public class LingoRemoteInvocationFactory implements RemoteInvocationFactory {
35 private static final MethodMetadata DEFAULT_METHOD_METADATA = new MethodMetadata(false);
36
37 private MetadataStrategy metadataStrategy;
38 private Map cache = new HashMap();
39
40 public LingoRemoteInvocationFactory(MetadataStrategy metadataStrategy) {
41 this.metadataStrategy = metadataStrategy;
42 }
43
44 public RemoteInvocation createRemoteInvocation(MethodInvocation methodInvocation) {
45 MethodMetadata metadata = getMethodMetadata(methodInvocation);
46 return new LingoInvocation(methodInvocation, metadata);
47 }
48
49 protected synchronized MethodMetadata getMethodMetadata(MethodInvocation methodInvocation) {
50 Method method = methodInvocation.getMethod();
51 MethodMetadata answer = (MethodMetadata) cache.get(method);
52 if (answer == null) {
53 if (metadataStrategy == null) {
54
55 answer = DEFAULT_METHOD_METADATA;
56 }
57 else {
58 answer = metadataStrategy.getMethodMetadata(method);
59 }
60 cache.put(method, answer);
61 }
62 return answer;
63 }
64
65 }