1 /** 2 * This file Copyright (c) 2003-2011 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.apache.commons.lang.ArrayUtils; 37 import org.xml.sax.Attributes; 38 import org.xml.sax.SAXException; 39 import org.xml.sax.XMLReader; 40 import org.xml.sax.helpers.XMLFilterImpl; 41 42 43 /** 44 * SAX filter, strips version information from a JCR XML (system view). 45 * 46 * @version $Id: VersionFilter.java 49479 2011-09-22 14:47:56Z ndesmarais $ 47 */ 48 public class VersionFilter extends XMLFilterImpl { 49 50 /** 51 * if != 0 we are in the middle of a filtered element. 52 */ 53 private int inVersionElement; 54 55 /** 56 * Instantiates a new version filter. 57 * @param parent wrapped XMLReader 58 */ 59 public VersionFilter(XMLReader parent) { 60 super(parent); 61 } 62 63 public static String[] FILTERED_PROPERTIES = new String[]{// 64 "jcr:predecessors", // version 65 "jcr:baseVersion", // version 66 "jcr:versionHistory", // version 67 "jcr:isCheckedOut", // useless 68 "jcr:created", // useless 69 "mgnl:sequenceposition" // old 70 }; 71 72 public static String[] FILTERED_NODES = new String[]{// 73 "jcr:system", // jcr system 74 }; 75 76 /** 77 * @see org.xml.sax.helpers.XMLFilterImpl#endElement(String, String, String) 78 */ 79 @Override 80 public void endElement(String uri, String localName, String qName) throws SAXException { 81 82 if (inVersionElement > 0) { 83 inVersionElement--; 84 return; 85 } 86 87 super.endElement(uri, localName, qName); 88 } 89 90 /** 91 * @see org.xml.sax.helpers.XMLFilterImpl#characters(char[], int, int) 92 */ 93 @Override 94 public void characters(char[] ch, int start, int length) throws SAXException { 95 // filter content 96 if (inVersionElement == 0) { 97 super.characters(ch, start, length); 98 } 99 } 100 101 /** 102 * @see org.xml.sax.helpers.XMLFilterImpl#startElement(String, String, String, Attributes) 103 */ 104 @Override 105 public void startElement(String uri, String localName, String qName, Attributes atts) throws SAXException { 106 107 if (inVersionElement > 0) { 108 inVersionElement++; 109 return; 110 } 111 if ("sv:node".equals(qName)) { 112 String attName = atts.getValue("sv:name"); 113 if (attName != null && ArrayUtils.contains(FILTERED_NODES, attName)) { 114 inVersionElement++; 115 return; 116 } 117 } else if ("sv:property".equals(qName)) { 118 String attName = atts.getValue("sv:name"); 119 if (attName != null && ArrayUtils.contains(FILTERED_PROPERTIES, attName)) { 120 inVersionElement++; 121 return; 122 } 123 } 124 125 super.startElement(uri, localName, qName, atts); 126 } 127 128 }