jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/doclets/internal/toolkit/builders/LayoutParser.java@959103a6100f

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http://hg.openjdk.java.net/jdk8u/jdk8u/langtools/
changeset: 2573:53ca196be1ae
tag: jdk8u25-b17

     1 /*

     2  * Copyright (c) 2003, 2013, Oracle and/or its affiliates. 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.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 package com.sun.tools.doclets.internal.toolkit.builders;

    27 import java.io.*;

    28 import java.util.*;

    30 import javax.xml.parsers.*;

    32 import org.xml.sax.*;

    33 import org.xml.sax.helpers.DefaultHandler;

    35 import com.sun.tools.doclets.internal.toolkit.*;

    36 import com.sun.tools.doclets.internal.toolkit.util.*;

    38 /**

    39  * Parse the XML that specified the order of operation for the builders.  This

    40  * Parser uses SAX parsing.

    41  *

    42  *  <p><b>This is NOT part of any supported API.

    43  *  If you write code that depends on this, you do so at your own risk.

    44  *  This code and its internal interfaces are subject to change or

    45  *  deletion without notice.</b>

    46  *

    47  * @author Jamie Ho

    48  * @since 1.5

    49  * @see SAXParser

    50  */

    51 public class LayoutParser extends DefaultHandler {

    53     /**

    54      * The map of XML elements that have been parsed.

    55      */

    56     private Map<String,XMLNode> xmlElementsMap;

    57     private XMLNode currentNode;

    58     private final Configuration configuration;

    59     private String currentRoot;

    60     private boolean isParsing;

    62     private LayoutParser(Configuration configuration) {

    63         xmlElementsMap = new HashMap<String,XMLNode>();

    64         this.configuration = configuration;

    65     }

    67     /**

    68      * Return an instance of the BuilderXML.

    69      *

    70      * @param configuration the current configuration of the doclet.

    71      * @return an instance of the BuilderXML.

    72      */

    73     public static LayoutParser getInstance(Configuration configuration) {

    74         return new LayoutParser(configuration);

    75     }

    77     /**

    78      * Parse the XML specifying the layout of the documentation.

    79      *

    80      * @return the list of XML elements parsed.

    81      */

    82     public XMLNode parseXML(String root) {

    83         if (xmlElementsMap.containsKey(root)) {

    84             return xmlElementsMap.get(root);

    85         }

    86         try {

    87             currentRoot = root;

    88             isParsing = false;

    89             SAXParserFactory factory = SAXParserFactory.newInstance();

    90             SAXParser saxParser = factory.newSAXParser();

    91             InputStream in = configuration.getBuilderXML();

    92             saxParser.parse(in, this);

    93             return xmlElementsMap.get(root);

    94         } catch (Throwable t) {

    95             t.printStackTrace();

    96             throw new DocletAbortException(t);

    97         }

    98     }

   100     /**

   101      * {@inheritDoc}

   102      */

   103     @Override

   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             currentNode = new XMLNode(currentNode, qName);

   110             for (int i = 0; i < attrs.getLength(); i++)

   111                 currentNode.attrs.put(attrs.getLocalName(i), attrs.getValue(i));

   112             if (qName.equals(currentRoot))

   113                 xmlElementsMap.put(qName, currentNode);

   114         }

   115     }

   117     /**

   118      * {@inheritDoc}

   119      */

   120     @Override

   121     public void endElement(String namespaceURI, String sName, String qName)

   122     throws SAXException {

   123         if (! isParsing) {

   124             return;

   125         }

   126         currentNode = currentNode.parent;

   127         isParsing = ! qName.equals(currentRoot);

   128     }

   129 }

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