1 /**
2 * This file Copyright (c) 2003-2010 Magnolia International
3 * Ltd. (http://www.magnolia-cms.com). All rights reserved.
4 *
5 *
6 * This file is dual-licensed under both the Magnolia
7 * Network Agreement and the GNU General Public License.
8 * You may elect to use one or the other of these licenses.
9 *
10 * This file is distributed in the hope that it will be
11 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
12 * implied warranty of MERCHANTABILITY or FITNESS FOR A
13 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
14 * Redistribution, except as permitted by whichever of the GPL
15 * or MNA you select, is prohibited.
16 *
17 * 1. For the GPL license (GPL), you can redistribute and/or
18 * modify this file under the terms of the GNU General
19 * Public License, Version 3, as published by the Free Software
20 * Foundation. You should have received a copy of the GNU
21 * General Public License, Version 3 along with this program;
22 * if not, write to the Free Software Foundation, Inc., 51
23 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
24 *
25 * 2. For the Magnolia Network Agreement (MNA), this file
26 * and the accompanying materials are made available under the
27 * terms of the MNA which accompanies this distribution, and
28 * is available at http://www.magnolia-cms.com/mna.html
29 *
30 * Any modifications to this file must keep this entire header
31 * intact.
32 *
33 */
34 package info.magnolia.importexport.filters;
35
36 import org.xml.sax.Attributes;
37 import org.xml.sax.SAXException;
38 import org.xml.sax.XMLReader;
39 import org.xml.sax.helpers.XMLFilterImpl;
40
41 /**
42 * A simple filter that removes whole nodes
43 *
44 * @author tmiyar
45 * @version $Revision: $ ($Author: $)
46 */
47 public abstract class SkipNodeFilter extends XMLFilterImpl {
48
49 private final static String NODE_TAG = "sv:node";
50 private final static String NAME_TAG = "sv:name";
51
52 private boolean skipping;
53
54 private int skipDepth;
55
56 public SkipNodeFilter(XMLReader parent) {
57 super(parent);
58 }
59
60 public void ignorableWhitespace(char[] ch, int start, int length) throws SAXException {
61 if (!skipping) {
62 ignorableWhitespace(ch, start, length);
63 }
64 }
65
66 public void characters(char[] ch, int start, int length)
67 throws SAXException {
68 if (!skipping) {
69 super.characters(ch, start, length);
70 }
71 }
72
73 public void startElement(String uri, String localName, String qName, Attributes atts) throws SAXException {
74
75 String svname = atts.getValue(NAME_TAG);
76
77 if (skipping) {
78 skipDepth++;
79 return;
80 }
81 if (NODE_TAG.equals(qName) && getFilteredNodeName().equals(svname)) {
82 skipping = true;
83 return;
84 }
85
86 super.startElement(uri, localName, qName, atts);
87 }
88
89 public void endElement(String uri, String localName, String qName)
90 throws SAXException {
91
92 if (skipping) {
93 if (skipDepth == 0) {
94 skipping = false;
95 } else {
96 skipDepth--;
97 }
98 return;
99 }
100
101 super.endElement(uri, localName, qName);
102 }
103
104 /**
105 * Implement this method to specify the name of the node you want to filter.
106 *
107 * @return filtered node name
108 */
109 protected abstract String getFilteredNodeName();
110
111 }