EscapeHtmlEntities


1   /**
2    * 
3    */
4   package org.appfuse.buildtools;
5   
6   import java.io.IOException  ;
7   import java.io.Reader  ;
8   
9   import org.apache.commons.lang.StringEscapeUtils;
10  import org.apache.tools.ant.filters.BaseParamFilterReader;
11  import org.apache.tools.ant.filters.ChainableReader;
12  
13  /**
14   * @author Mika
15   * 
16   */
17  public class EscapeHtmlEntities extends BaseParamFilterReader implements ChainableReader {
18  
19      public static final String   ESCAPE = "escape";
20      public static final String   UNESCAPE = "unescape";
21      /** Data that must be read from, if not null. */
22      private String   queuedData = null;
23      private String   mode;
24      
25      public EscapeHtmlEntities() {
26          super();
27      }
28  
29      public EscapeHtmlEntities(final Reader   rdr) {
30          super(rdr);
31      }
32      
33      /* (non-Javadoc)
34       * @see java.io.FilterReader#read()
35       */
36      public int read() throws IOException   {
37          int ch = -1;
38  
39          if (queuedData != null && queuedData.length() == 0) {
40              queuedData = null;
41          }
42  
43          if (queuedData != null) {
44              ch = queuedData.charAt(0);
45              queuedData = queuedData.substring(1);
46              if (queuedData.length() == 0) {
47                  queuedData = null;
48              }
49          } else {
50              queuedData = readFully();
51              if (queuedData == null) {
52                  ch = -1;
53              } else {
54                  queuedData = handleEntities(queuedData);
55                  return read();
56              }
57          }
58          return ch;
59      }
60  
61      /**
62       * @param queuedData2
63       * @return
64       */
65      private String   handleEntities(String   queuedData2) {
66          if(ESCAPE.equalsIgnoreCase(mode)){
67              return StringEscapeUtils.escapeHtml(queuedData2);
68          } else {
69              return  StringEscapeUtils.unescapeHtml(queuedData2);
70          }
71      }
72  
73      /* (non-Javadoc)
74       * @see org.apache.tools.ant.filters.ChainableReader#chain(java.io.Reader)
75       */
76      public Reader   chain(Reader   rdr) {
77          EscapeHtmlEntities filter = new EscapeHtmlEntities(rdr);
78          return filter;
79      }
80  
81      /**
82       * @return Returns the mode.
83       */
84      public String   getMode() {
85          return mode;
86      }
87  
88      /**
89       * @param mode The mode to set.
90       */
91      public void setMode(String   mode) {
92          this.mode = mode;
93      }
94  
95  }
96
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