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Java > Open Source Codes > org > apache > xml > utils > XMLStringFactoryDefault


1 /*
2  * Copyright 1999-2004 The Apache Software Foundation.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 /*
17  * $Id: XMLStringFactoryDefault.java,v 1.3 2004/02/17 04:21:14 minchau Exp $
18  */
19 package org.apache.xml.utils;
20
21 /**
22  * The default implementation of XMLStringFactory.
23  * This implementation creates XMLStringDefault objects.
24  */
25 public class XMLStringFactoryDefault extends XMLStringFactory
26 {
27   // A constant representing the empty String
28 private static final XMLStringDefault EMPTY_STR = new XMLStringDefault("");
29   
30   /**
31    * Create a new XMLString from a Java string.
32    *
33    *
34    * @param string Java String reference, which must be non-null.
35    *
36    * @return An XMLString object that wraps the String reference.
37    */
38   public XMLString newstr(String JavaDoc string)
39   {
40     return new XMLStringDefault(string);
41   }
42
43   /**
44    * Create a XMLString from a FastStringBuffer.
45    *
46    *
47    * @param fsb FastStringBuffer reference, which must be non-null.
48    * @param start The start position in the array.
49    * @param length The number of characters to read from the array.
50    *
51    * @return An XMLString object that wraps the FastStringBuffer reference.
52    */
53   public XMLString newstr(FastStringBuffer fsb, int start, int length)
54   {
55     return new XMLStringDefault(fsb.getString(start, length));
56   }
57
58   /**
59    * Create a XMLString from a FastStringBuffer.
60    *
61    *
62    * @param string FastStringBuffer reference, which must be non-null.
63    * @param start The start position in the array.
64    * @param length The number of characters to read from the array.
65    *
66    * @return An XMLString object that wraps the FastStringBuffer reference.
67    */
68   public XMLString newstr(char[] string, int start, int length)
69   {
70     return new XMLStringDefault(new String JavaDoc(string, start, length));
71   }
72                                    
73   /**
74    * Get a cheap representation of an empty string.
75    *
76    * @return An non-null reference to an XMLString that represents "".
77    */
78   public XMLString emptystr()
79   {
80     return EMPTY_STR;
81   }
82 }
83
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