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Java > Open Source Codes > com > caucho > relaxng > program > DataItem


1 /*
2  * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3  *
4  * This file is part of Resin(R) Open Source
5  *
6  * Each copy or derived work must preserve the copyright notice and this
7  * notice unmodified.
8  *
9  * Resin Open Source is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * Resin Open Source is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17  * of NON-INFRINGEMENT. See the GNU General Public License for more
18  * details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with Resin Open Source; if not, write to the
22  * Free SoftwareFoundation, Inc.
23  * 59 Temple Place, Suite 330
24  * Boston, MA 02111-1307 USA
25  *
26  * @author Scott Ferguson
27  */
28
29 package com.caucho.relaxng.program;
30
31 import com.caucho.util.L10N;
32 import com.caucho.xml.QName;
33
34 import java.util.HashSet JavaDoc;
35
36 /**
37  * Represents generaic text.
38  */
39 public class DataItem extends Item {
40   protected final static L10N L = new L10N(DataItem.class);
41
42   private String JavaDoc _type;
43   
44   public DataItem(String JavaDoc type)
45   {
46     _type = type;
47   }
48
49   /**
50    * Returns the first set, the set of element names possible.
51    */
52   public void firstSet(HashSet JavaDoc<QName> set)
53   {
54     set.add(new QName("#data", ""));
55   }
56   
57   /**
58    * Data allows the empty match.
59    */
60   public boolean allowEmpty()
61   {
62     return true;
63   }
64   
65   /**
66    * Data repeats
67    */
68   public Item text(String JavaDoc text)
69   {
70     return this;
71   }
72
73   /**
74    * Returns the pretty printed syntax.
75    */
76   public String JavaDoc toSyntaxDescription(int depth)
77   {
78     return "string";
79   }
80
81   /**
82    * Returns the hash code for the empty item.
83    */
84   public int hashCode()
85   {
86     return 193 + _type.hashCode();
87   }
88
89   /**
90    * Returns true if the object is an empty item.
91    */
92   public boolean equals(Object JavaDoc o)
93   {
94     if (this == o)
95       return true;
96     
97     if (! (o instanceof DataItem))
98       return false;
99
100     DataItem item = (DataItem) o;
101
102     return _type.equals(item._type);
103   }
104
105   public String JavaDoc toString()
106   {
107     return "DataItem[]";
108   }
109 }
110
111
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