1   /**
2    * Copyright (c) 2000-2010 Liferay, Inc. All rights reserved.
3    *
4    * The contents of this file are subject to the terms of the Liferay Enterprise
5    * Subscription License ("License"). You may not use this file except in
6    * compliance with the License. You can obtain a copy of the License by
7    * contacting Liferay, Inc. See the License for the specific language governing
8    * permissions and limitations under the License, including but not limited to
9    * distribution rights of the Software.
10   *
11   *
12   *
13   */
14  
15  package com.liferay.util;
16  
17  import com.liferay.portal.kernel.util.StringUtil;
18  
19  import java.util.ArrayList;
20  import java.util.Iterator;
21  import java.util.LinkedHashMap;
22  import java.util.List;
23  import java.util.Map;
24  
25  /**
26   * <a href="ContextReplace.java.html"><b><i>View Source</i></b></a>
27   *
28   * @author Brian Wing Shun Chan
29   */
30  public class ContextReplace implements Cloneable {
31  
32      public ContextReplace() {
33          this(null);
34      }
35  
36      public ContextReplace(Map<String, String> context) {
37          if (context != null) {
38              _context.putAll(context);
39  
40              _updateArrays();
41          }
42      }
43  
44      public void addValue(String key, String value) {
45          if ((key != null) && (value != null)) {
46              _context.put(key, value);
47  
48              _updateArrays();
49          }
50      }
51  
52      public String replace(String text) {
53          if (text == null) {
54              return null;
55          }
56  
57          if (_keys.length == 0) {
58              return text;
59          }
60  
61          return StringUtil.replace(text, _keys, _values);
62      }
63  
64      public Object clone() {
65          return new ContextReplace(_context);
66      }
67  
68      private void _updateArrays() {
69          List<String> keys = new ArrayList<String>();
70          List<String> values = new ArrayList<String>();
71  
72          Iterator<Map.Entry<String, String>> itr =
73              _context.entrySet().iterator();
74  
75          while (itr.hasNext()) {
76              Map.Entry<String, String> entry = itr.next();
77  
78              String entryKey = entry.getKey();
79              String entryValue = entry.getValue();
80  
81              keys.add("${" + entryKey + "}");
82              values.add(entryValue);
83          }
84  
85          _keys = keys.toArray(new String[keys.size()]);
86          _values = values.toArray(new String[values.size()]);
87      }
88  
89      private Map<String, String> _context = new LinkedHashMap<String, String>();
90      private String[] _keys = new String[0];
91      private String[] _values = new String[0];
92  
93  }