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: package org.apache.cocoon.components.treeprocessor.variables;
18:
19: import org.apache.cocoon.components.treeprocessor.InvokeContext;
20:
21: import java.util.Map;
22:
23: /**
24: * No-op implementation of {@link VariableResolver} for constant expressions
25: *
26: * @version CVS $Id: NOPVariableResolver.java 433543 2006-08-22 06:22:54Z crossley $
27: */
28: public class NOPVariableResolver extends VariableResolver {
29:
30: private String expression = null;
31:
32: public NOPVariableResolver(String expression) {
33: super (expression);
34: if (expression != null) {
35: this .expression = VariableResolverFactory
36: .unescape(expression);
37: }
38: }
39:
40: public final String resolve(InvokeContext context, Map objectModel) {
41: return this .expression;
42: }
43:
44: public final void release() {
45: // Nothing to do
46: }
47: }
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