1 /**
2 * This file Copyright (c) 2003-2015 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 skips over import of child nodes.
43 */
44 public abstract class SkipNodeFilter extends XMLFilterImpl {
45
46 private final static String NODE_TAG = "sv:node";
47 private final static String NAME_TAG = "sv:name";
48
49 private boolean skipping;
50
51 private int skipDepth;
52
53 public SkipNodeFilter(XMLReader parent) {
54 super(parent);
55 }
56
57 @Override
58 public void ignorableWhitespace(char[] ch, int start, int length) throws SAXException {
59 if (!skipping) {
60 super.ignorableWhitespace(ch, start, length);
61 }
62 }
63
64 @Override
65 public void characters(char[] ch, int start, int length)
66 throws SAXException {
67 if (!skipping) {
68 super.characters(ch, start, length);
69 }
70 }
71
72 @Override
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 @Override
90 public void endElement(String uri, String localName, String qName)
91 throws SAXException {
92
93 if (skipping) {
94 if (skipDepth == 0) {
95 skipping = false;
96 } else {
97 skipDepth--;
98 }
99 return;
100 }
101
102 super.endElement(uri, localName, qName);
103 }
104
105 /**
106 * Implement this method to specify the name of the node you want to filter.
107 *
108 * @return filtered node name
109 */
110 protected abstract String getFilteredNodeName();
111
112 }