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1   /*
2    * $Id: ValueStackAdapter.java 471756 2006-11-06 15:01:43Z husted $
3    *
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *  http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing,
15   * software distributed under the License is distributed on an
16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17   * KIND, either express or implied.  See the License for the
18   * specific language governing permissions and limitations
19   * under the License.
20   */
21  // Copyright 2006 Google Inc. All Rights Reserved.
22  
23  package org.apache.struts2.impl;
24  
25  import java.util.Iterator;
26  
27  import org.apache.struts2.spi.ValueStack;
28  
29  import com.opensymphony.xwork2.util.ValueStackFactory;
30  
31  public class ValueStackAdapter implements ValueStack {
32  
33      final com.opensymphony.xwork2.util.ValueStack delegate;
34  
35      public ValueStackAdapter(com.opensymphony.xwork2.util.ValueStack delegate) {
36          this.delegate = delegate;
37      }
38  
39      public Object peek() {
40          return delegate.peek();
41      }
42  
43      public Object pop() {
44          return delegate.pop();
45      }
46  
47      public void push(Object o) {
48          delegate.push(o);
49      }
50  
51      public ValueStack clone() {
52          return new ValueStackAdapter(ValueStackFactory.getFactory().createValueStack(delegate));
53      }
54  
55      public Object get(String expr) {
56          return delegate.findValue(expr);
57      }
58  
59      public <T> T get(String expr, Class<T> requiredType) {
60          return (T) delegate.findValue(expr, requiredType);
61      }
62  
63      public String getString(String expr) {
64          return delegate.findString(expr);
65      }
66  
67      public void set(String expr, Object o) {
68          delegate.set(expr, o);
69      }
70  
71      public int size() {
72          return delegate.size();
73      }
74  
75      public Iterator<Object> iterator() {
76          return delegate.getRoot().iterator();
77      }
78  }