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Java > Open Source Codes > org > apache > el > lang > VariableMapperImpl


1 /*
2  * Licensed to the Apache Software Foundation (ASF) under one or more
3  * contributor license agreements. See the NOTICE file distributed with
4  * this work for additional information regarding copyright ownership.
5  * The ASF licenses this file to You under the Apache License, Version 2.0
6  * (the "License"); you may not use this file except in compliance with
7  * the License. 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.apache.el.lang;
19
20 import java.io.Externalizable JavaDoc;
21 import java.io.IOException JavaDoc;
22 import java.io.ObjectInput JavaDoc;
23 import java.io.ObjectOutput JavaDoc;
24 import java.util.HashMap JavaDoc;
25 import java.util.Map JavaDoc;
26
27 import javax.el.ValueExpression;
28 import javax.el.VariableMapper;
29
30 public class VariableMapperImpl extends VariableMapper implements Externalizable JavaDoc {
31
32     private static final long serialVersionUID = 1L;
33     
34     private Map JavaDoc vars = new HashMap JavaDoc();
35     
36     public VariableMapperImpl() {
37         super();
38     }
39
40     public ValueExpression resolveVariable(String JavaDoc variable) {
41         return (ValueExpression) this.vars.get(variable);
42     }
43
44     public ValueExpression setVariable(String JavaDoc variable,
45             ValueExpression expression) {
46         return (ValueExpression) this.vars.put(variable, expression);
47     }
48
49     public void readExternal(ObjectInput JavaDoc in) throws IOException JavaDoc, ClassNotFoundException JavaDoc {
50         this.vars = (Map JavaDoc) in.readObject();
51     }
52
53     public void writeExternal(ObjectOutput JavaDoc out) throws IOException JavaDoc {
54         out.writeObject(this.vars);
55     }
56 }
57
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