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Java > Open Source Codes > org > apache > jasper > el > ExpressionImpl


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 package org.apache.jasper.el;
18
19 import javax.el.CompositeELResolver;
20 import javax.el.ELContext;
21 import javax.el.ELResolver;
22 import javax.el.ValueExpression;
23 import javax.servlet.jsp.el.ELException JavaDoc;
24 import javax.servlet.jsp.el.Expression JavaDoc;
25 import javax.servlet.jsp.el.VariableResolver JavaDoc;
26
27 import org.apache.jasper.runtime.JspApplicationContextImpl;
28
29 public final class ExpressionImpl extends Expression {
30
31     private final ValueExpression ve;
32     
33     public ExpressionImpl(ValueExpression ve) {
34         this.ve = ve;
35     }
36
37     public Object JavaDoc evaluate(VariableResolver JavaDoc vResolver) throws ELException JavaDoc {
38         ELContext ctx = new ELContextImpl(new ELResolverImpl(vResolver));
39         return ve.getValue(ctx);
40     }
41
42 }
43
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