01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * 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.apache.el.lang;
19:
20: import java.lang.reflect.Method;
21:
22: import javax.el.FunctionMapper;
23:
24: /**
25: * @author Jacob Hookom [jacob@hookom.net]
26: * @version $Change: 181177 $$DateTime: 2001/06/26 08:45:09 $$Author: markt $
27: */
28: public class FunctionMapperFactory extends FunctionMapper {
29:
30: protected FunctionMapperImpl memento = null;
31: protected FunctionMapper target;
32:
33: public FunctionMapperFactory(FunctionMapper mapper) {
34: if (mapper == null) {
35: throw new NullPointerException(
36: "FunctionMapper target cannot be null");
37: }
38: this .target = mapper;
39: }
40:
41: /* (non-Javadoc)
42: * @see javax.el.FunctionMapper#resolveFunction(java.lang.String, java.lang.String)
43: */
44: public Method resolveFunction(String prefix, String localName) {
45: if (this .memento == null) {
46: this .memento = new FunctionMapperImpl();
47: }
48: Method m = this .target.resolveFunction(prefix, localName);
49: if (m != null) {
50: this .memento.addFunction(prefix, localName, m);
51: }
52: return m;
53: }
54:
55: public FunctionMapper create() {
56: return this.memento;
57: }
58:
59: }
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