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Java > Open Source Codes > net > killingar > wiki > parser > ReplaceParser


1 /* Copyright 2000-2005 Anders Hovmöller
2  *
3  * The person or persons who have associated their work with
4  * this document (the "Dedicator") hereby dedicate the entire
5  * copyright in the work of authorship identified below (the
6  * "Work") to the public domain.
7  *
8  * Dedicator makes this dedication for the benefit of the
9  * public at large and to the detriment of Dedicator's heirs
10  * and successors. Dedicator intends this dedication to be an
11  * overt act of relinquishment in perpetuity of all present
12  * and future rights under copyright law, whether vested or
13  * contingent, in the Work. Dedicator understands that such
14  * relinquishment of all rights includes the relinquishment of
15  * all rights to enforce (by lawsuit or otherwise) those
16  * copyrights in the Work.
17  *
18  * Dedicator recognizes that, once placed in the public
19  * domain, the Work may be freely reproduced, distributed,
20  * transmitted, used, modified, built upon, or otherwise
21  * exploited by anyone for any purpose, commercial or non-
22  * commercial, and in any way, including by methods that have
23  * not yet been invented or conceived.
24  */
25
26 package net.killingar.wiki.parser;
27
28 import net.killingar.wiki.Node;
29 import net.killingar.wiki.Parser;
30 import net.killingar.wiki.impl.AbstractNode;
31 import net.killingar.wiki.impl.LineNode;
32 import net.killingar.wiki.impl.LiteralNode;
33 import net.killingar.wiki.impl.SimpleNode;
34
35 /**
36  * Note this class is not safe thread.
37  * One instance per thread otherwise non predictable
38  * results will occur.
39  *
40  * 14:39:36
41  * 31/12/2002
42  * @author boxed
43  */
44 public class ReplaceParser implements Parser
45 {
46     private String JavaDoc data;
47     private int currentOffset = 0;
48     private int line = -1;
49     private int stage = 0;
50
51     private String JavaDoc search, replace;
52
53     /**
54      * Constructor for ReplaceParser.
55      */
56     public ReplaceParser(String JavaDoc inSearch, String JavaDoc inReplace)
57     {
58         search = inSearch;
59         replace = inReplace;
60     }
61
62     private void setParsableString(String JavaDoc inParsableString)
63     {
64         data = inParsableString;
65     }
66
67     public void setSource(Object JavaDoc o)
68     {
69         if (o instanceof String JavaDoc)
70             setParsableString((String JavaDoc)o);
71         else if (o.getClass() == SimpleNode.class || o.getClass() == LineNode.class)
72         {
73             setParsableString(((AbstractNode)o).getText());
74             line = ((AbstractNode)o).getLineNumber();
75         }
76         else
77             throw new IllegalArgumentException JavaDoc("unsupported type "+o.getClass());
78
79         currentOffset = 0;
80     }
81
82     public boolean hasMore()
83     {
84         if (data == null)
85             return false;
86
87         return currentOffset < data.length();
88     }
89
90     public Node next()
91     {
92         if (currentOffset >= data.length())
93             throw new IllegalStateException JavaDoc("past end");
94
95         Node n = null;
96
97         int foo = currentOffset;
98
99         if (stage == 0)
100         {
101             foo = data.indexOf(search, currentOffset);
102
103             if (foo != -1)
104             {
105                 n = new SimpleNode(data.substring(currentOffset, foo), line, currentOffset, foo);
106                 stage++;
107
108                 currentOffset = foo+search.length();
109             }
110             else
111             {
112                 foo = data.length();
113                 n = new SimpleNode(data.substring(currentOffset, foo), line, currentOffset, foo);
114
115                 currentOffset = data.length();
116             }
117         }
118         else //if (stage == 1)
119 {
120             stage = 0;
121             n = new LiteralNode(replace, line, currentOffset, foo);
122         }
123
124         return n;
125     }
126
127     public static final void main(String JavaDoc[] args)
128     {
129         ReplaceParser p = new ReplaceParser("foo\n\\{divider}", "<hr/>");
130         p.setSource("Den coola privata sidan för hailkören möller! Jag testar massa shit med forumet, så ni kommer bli irriterade på hur ofta den här sidan ändras :P\n\n{divider}\nfoobar!");
131
132         while(p.hasMore())
133         {
134             System.out.println(p.next());
135         }
136     }
137 }
138
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