1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    * Permission is hereby granted, free of charge, to any person obtaining a copy
5    * of this software and associated documentation files (the "Software"), to deal
6    * in the Software without restriction, including without limitation the rights
7    * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8    * copies of the Software, and to permit persons to whom the Software is
9    * furnished to do so, subject to the following conditions:
10   *
11   * The above copyright notice and this permission notice shall be included in
12   * all copies or substantial portions of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.util;
24  
25  import com.liferay.portal.kernel.util.StringUtil;
26  
27  import java.util.ArrayList;
28  import java.util.Iterator;
29  import java.util.LinkedHashMap;
30  import java.util.List;
31  import java.util.Map;
32  
33  /**
34   * <a href="ContextReplace.java.html"><b><i>View Source</i></b></a>
35   *
36   * @author Brian Wing Shun Chan
37   *
38   */
39  public class ContextReplace implements Cloneable {
40  
41      public ContextReplace() {
42          this(null);
43      }
44  
45      public ContextReplace(Map<String, String> context) {
46          if (context != null) {
47              _context.putAll(context);
48  
49              _updateArrays();
50          }
51      }
52  
53      public void addValue(String key, String value) {
54          if ((key != null) && (value != null)) {
55              _context.put(key, value);
56  
57              _updateArrays();
58          }
59      }
60  
61      public String replace(String text) {
62          if (text == null) {
63              return null;
64          }
65  
66          if (_keys.length == 0) {
67              return text;
68          }
69  
70          return StringUtil.replace(text, _keys, _values);
71      }
72  
73      public Object clone() {
74          return new ContextReplace(_context);
75      }
76  
77      private void _updateArrays() {
78          List<String> keys = new ArrayList<String>();
79          List<String> values = new ArrayList<String>();
80  
81          Iterator<Map.Entry<String, String>> itr =
82              _context.entrySet().iterator();
83  
84          while (itr.hasNext()) {
85              Map.Entry<String, String> entry = itr.next();
86  
87              String entryKey = entry.getKey();
88              String entryValue = entry.getValue();
89  
90              keys.add("${" + entryKey + "}");
91              values.add(entryValue);
92          }
93  
94          _keys = keys.toArray(new String[keys.size()]);
95          _values = values.toArray(new String[values.size()]);
96      }
97  
98      private Map<String, String> _context = new LinkedHashMap<String, String>();
99      private String[] _keys = new String[0];
100     private String[] _values = new String[0];
101 
102 }