Mercurial > jdk8-mips64-public > langtools / file comparison
comparison: src/share/classes/com/sun/tools/doclets/internal/toolkit/builders/LayoutParser.java
src/share/classes/com/sun/tools/doclets/internal/toolkit/builders/LayoutParser.java
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| 1 /* | |
| 2 * Copyright 2003 Sun Microsystems, Inc. All Rights Reserved. | |
| 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. Sun designates this | |
| 8 * particular file as subject to the "Classpath" exception as provided | |
| 9 * by Sun in the LICENSE file that accompanied this code. | |
| 10 * | |
| 11 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 * version 2 for more details (a copy is included in the LICENSE file that | |
| 15 * accompanied this code). | |
| 16 * | |
| 17 * You should have received a copy of the GNU General Public License version | |
| 18 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 20 * | |
| 21 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 22 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 23 * have any questions. | |
| 24 */ | |
| 25 package com.sun.tools.doclets.internal.toolkit.builders; | |
| 26 | |
| 27 import com.sun.tools.doclets.internal.toolkit.*; | |
| 28 import com.sun.tools.doclets.internal.toolkit.util.*; | |
| 29 import java.io.*; | |
| 30 import java.util.*; | |
| 31 import org.xml.sax.*; | |
| 32 import org.xml.sax.helpers.DefaultHandler; | |
| 33 import javax.xml.parsers.*; | |
| 34 | |
| 35 /** | |
| 36 * Parse the XML that specified the order of operation for the builders. This | |
| 37 * Parser uses SAX parsing. | |
| 38 * | |
| 39 * @author Jamie Ho | |
| 40 * @since 1.5 | |
| 41 * @see SAXParser | |
| 42 */ | |
| 43 public class LayoutParser extends DefaultHandler { | |
| 44 | |
| 45 /** | |
| 46 * The map of XML elements that have been parsed. | |
| 47 */ | |
| 48 private Map xmlElementsMap; | |
| 49 | |
| 50 private Configuration configuration; | |
| 51 private static LayoutParser instance; | |
| 52 private String currentRoot; | |
| 53 private boolean isParsing; | |
| 54 | |
| 55 /** | |
| 56 * This class is a singleton. | |
| 57 */ | |
| 58 private LayoutParser(Configuration configuration) { | |
| 59 xmlElementsMap = new HashMap(); | |
| 60 this.configuration = configuration; | |
| 61 } | |
| 62 | |
| 63 /** | |
| 64 * Return an instance of the BuilderXML. | |
| 65 * | |
| 66 * @param configuration the current configuration of the doclet. | |
| 67 * @return an instance of the BuilderXML. | |
| 68 */ | |
| 69 public static LayoutParser getInstance(Configuration configuration) { | |
| 70 if (instance == null) { | |
| 71 instance = new LayoutParser(configuration); | |
| 72 } | |
| 73 return instance; | |
| 74 } | |
| 75 | |
| 76 /** | |
| 77 * Parse the XML specifying the layout of the documentation. | |
| 78 * | |
| 79 * @return List the list of XML elements parsed. | |
| 80 */ | |
| 81 public List parseXML(String root) { | |
| 82 if (xmlElementsMap.containsKey(root)) { | |
| 83 return (List) xmlElementsMap.get(root); | |
| 84 } | |
| 85 try { | |
| 86 List xmlElements = new ArrayList(); | |
| 87 xmlElementsMap.put(root, xmlElements); | |
| 88 currentRoot = root; | |
| 89 isParsing = false; | |
| 90 SAXParserFactory factory = SAXParserFactory.newInstance(); | |
| 91 SAXParser saxParser = factory.newSAXParser(); | |
| 92 InputStream in = configuration.getBuilderXML(); | |
| 93 saxParser.parse(in, this); | |
| 94 return xmlElements; | |
| 95 } catch (Throwable t) { | |
| 96 t.printStackTrace(); | |
| 97 throw new DocletAbortException(); | |
| 98 } | |
| 99 } | |
| 100 | |
| 101 /** | |
| 102 * {@inheritDoc} | |
| 103 */ | |
| 104 public void startElement(String namespaceURI, String sName, String qName, | |
| 105 Attributes attrs) | |
| 106 throws SAXException { | |
| 107 if (isParsing || qName.equals(currentRoot)) { | |
| 108 isParsing = true; | |
| 109 List xmlElements = (List) xmlElementsMap.get(currentRoot); | |
| 110 xmlElements.add(qName); | |
| 111 } | |
| 112 } | |
| 113 | |
| 114 /** | |
| 115 * {@inheritDoc} | |
| 116 */ | |
| 117 public void endElement(String namespaceURI, String sName, String qName) | |
| 118 throws SAXException { | |
| 119 if (! isParsing) { | |
| 120 isParsing = false; | |
| 121 return; | |
| 122 } | |
| 123 List xmlElements = (List) xmlElementsMap.get(currentRoot); | |
| 124 if (xmlElements.get(xmlElements.size()-1).equals(qName)) { | |
| 125 return; | |
| 126 } else { | |
| 127 List subElements = new ArrayList(); | |
| 128 int targetIndex = xmlElements.indexOf(qName); | |
| 129 int size = xmlElements.size(); | |
| 130 for (int i = targetIndex; i < size; i++) { | |
| 131 subElements.add(xmlElements.get(targetIndex)); | |
| 132 xmlElements.remove(targetIndex); | |
| 133 } | |
| 134 //Save the sub elements as a list. | |
| 135 xmlElements.add(subElements); | |
| 136 } | |
| 137 isParsing = ! qName.equals(currentRoot); | |
| 138 } | |
| 139 } |
