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SAXModifyElementHandler.java | 0% | 0% | 0% | 0% |
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1 | /* | |
2 | * Copyright 2001-2004 (C) MetaStuff, Ltd. All Rights Reserved. | |
3 | * | |
4 | * This software is open source. | |
5 | * See the bottom of this file for the licence. | |
6 | * | |
7 | * $Id: SAXModifyElementHandler.java,v 1.1 2004/08/02 18:44:07 maartenc Exp $ | |
8 | */ | |
9 | ||
10 | package org.dom4j.io; | |
11 | ||
12 | import org.dom4j.Element; | |
13 | import org.dom4j.ElementHandler; | |
14 | import org.dom4j.ElementPath; | |
15 | ||
16 | /** | |
17 | * This {@link org.dom4j.ElementHandler} is used to trigger {@link ElementModifier) objects | |
18 | * in order to modify (parts of) the Document on the fly.<br> | |
19 | * When an element is completely parsed, | |
20 | * a copy is handed to the associated (if any) {@link ElementModifier) that on his turn returns | |
21 | * the modified element that has to come in the tree. | |
22 | * | |
23 | * @author Wonne Keysers (Realsoftware.be) | |
24 | */ | |
25 | class SAXModifyElementHandler implements ElementHandler { | |
26 | ||
27 | private ElementModifier elemModifier; | |
28 | private Element modifiedElement; | |
29 | ||
30 | 0 | public SAXModifyElementHandler(ElementModifier elemModifier) { |
31 | 0 | this.elemModifier = elemModifier; |
32 | } | |
33 | ||
34 | 0 | public void onStart(ElementPath elementPath) { |
35 | 0 | this.modifiedElement = elementPath.getCurrent(); |
36 | } | |
37 | ||
38 | 0 | public void onEnd(ElementPath elementPath) { |
39 | 0 | try { |
40 | 0 | Element originalElement = elementPath.getCurrent(); |
41 | 0 | Element currentParent = originalElement.getParent(); |
42 | ||
43 | 0 | if( currentParent != null){ |
44 | //Clone sets parent + document to null | |
45 | 0 | Element clonedElem = (Element) originalElement.clone(); |
46 | ||
47 | //Ask for modified element | |
48 | 0 | modifiedElement = elemModifier.modifyElement(clonedElem); |
49 | ||
50 | 0 | if( modifiedElement != null ){ |
51 | //Restore parent + document | |
52 | 0 | modifiedElement.setParent(originalElement.getParent()); |
53 | 0 | modifiedElement.setDocument(originalElement.getDocument()); |
54 | ||
55 | //Replace old with new element in parent | |
56 | 0 | int contentIndex = currentParent.indexOf(originalElement); |
57 | 0 | currentParent.content().set(contentIndex, modifiedElement); |
58 | } | |
59 | ||
60 | //Remove the old element | |
61 | 0 | originalElement.detach(); |
62 | } | |
63 | else{ | |
64 | 0 | if( originalElement.isRootElement() ){ |
65 | //Clone sets parent + document to null | |
66 | 0 | Element clonedElem = (Element) originalElement.clone(); |
67 | ||
68 | //Ask for modified element | |
69 | 0 | modifiedElement = elemModifier.modifyElement(clonedElem); |
70 | ||
71 | 0 | if( modifiedElement != null ){ |
72 | //Restore parent + document | |
73 | 0 | modifiedElement.setDocument(originalElement.getDocument()); |
74 | ||
75 | //Replace old with new element in parent | |
76 | 0 | originalElement.getDocument().setRootElement(modifiedElement); |
77 | } | |
78 | ||
79 | //Remove the old element | |
80 | 0 | originalElement.detach(); |
81 | } | |
82 | } | |
83 | ||
84 | //Put the new element on the ElementStack, it might get pruned by the PruningDispatchHandler | |
85 | 0 | if( elementPath instanceof ElementStack ){ |
86 | 0 | ElementStack elementStack = ((ElementStack)elementPath); |
87 | 0 | elementStack.popElement(); |
88 | 0 | elementStack.pushElement(modifiedElement); |
89 | } | |
90 | } | |
91 | catch (Exception ex) { | |
92 | 0 | throw new SAXModifyException(ex); |
93 | } | |
94 | } | |
95 | ||
96 | /** | |
97 | * @return Returns the modified Element. | |
98 | */ | |
99 | 0 | protected Element getModifiedElement() { |
100 | 0 | return modifiedElement; |
101 | } | |
102 | ||
103 | } | |
104 | ||
105 | ||
106 | ||
107 | ||
108 | /* | |
109 | * Redistribution and use of this software and associated documentation | |
110 | * ("Software"), with or without modification, are permitted provided | |
111 | * that the following conditions are met: | |
112 | * | |
113 | * 1. Redistributions of source code must retain copyright | |
114 | * statements and notices. Redistributions must also contain a | |
115 | * copy of this document. | |
116 | * | |
117 | * 2. Redistributions in binary form must reproduce the | |
118 | * above copyright notice, this list of conditions and the | |
119 | * following disclaimer in the documentation and/or other | |
120 | * materials provided with the distribution. | |
121 | * | |
122 | * 3. The name "DOM4J" must not be used to endorse or promote | |
123 | * products derived from this Software without prior written | |
124 | * permission of MetaStuff, Ltd. For written permission, | |
125 | * please contact dom4j-info@metastuff.com. | |
126 | * | |
127 | * 4. Products derived from this Software may not be called "DOM4J" | |
128 | * nor may "DOM4J" appear in their names without prior written | |
129 | * permission of MetaStuff, Ltd. DOM4J is a registered | |
130 | * trademark of MetaStuff, Ltd. | |
131 | * | |
132 | * 5. Due credit should be given to the DOM4J Project - | |
133 | * http://www.dom4j.org | |
134 | * | |
135 | * THIS SOFTWARE IS PROVIDED BY METASTUFF, LTD. AND CONTRIBUTORS | |
136 | * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT | |
137 | * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND | |
138 | * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL | |
139 | * METASTUFF, LTD. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, | |
140 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
141 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
142 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
143 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
144 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
145 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
146 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
147 | * | |
148 | * Copyright 2001-2004 (C) MetaStuff, Ltd. All Rights Reserved. | |
149 | * | |
150 | * $Id: SAXModifyElementHandler.java,v 1.1 2004/08/02 18:44:07 maartenc Exp $ | |
151 | */ |
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