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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package com.sun.tools.doclets.internal.toolkit.builders;
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import com.sun.tools.doclets.internal.toolkit.*;
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import com.sun.tools.doclets.internal.toolkit.util.*;
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import java.io.*;
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import java.util.*;
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import org.xml.sax.*;
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import org.xml.sax.helpers.DefaultHandler;
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import javax.xml.parsers.*;
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/**
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* Parse the XML that specified the order of operation for the builders. This
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* Parser uses SAX parsing.
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*
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* @author Jamie Ho
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* @since 1.5
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* @see SAXParser
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*/
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public class LayoutParser extends DefaultHandler {
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/**
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* The map of XML elements that have been parsed.
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*/
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private Map<String, XMLNode> xmlElementsMap;
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private XMLNode currentNode;
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private Configuration configuration;
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private static LayoutParser instance;
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private String currentRoot;
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private boolean isParsing;
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/**
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* This class is a singleton.
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*/
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private LayoutParser(Configuration configuration) {
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xmlElementsMap = new HashMap<String, XMLNode>();
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this.configuration = configuration;
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}
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/**
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* Return an instance of the BuilderXML.
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*
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* @param configuration
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* the current configuration of the doclet.
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* @return an instance of the BuilderXML.
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*/
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public static LayoutParser getInstance(Configuration configuration) {
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if (instance == null) {
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instance = new LayoutParser(configuration);
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}
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return instance;
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}
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/**
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* Parse the XML specifying the layout of the documentation.
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*
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* @return the list of XML elements parsed.
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*/
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public XMLNode parseXML(String root) {
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if (xmlElementsMap.containsKey(root)) {
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return xmlElementsMap.get(root);
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}
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try {
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currentRoot = root;
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isParsing = false;
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SAXParserFactory factory = SAXParserFactory.newInstance();
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SAXParser saxParser = factory.newSAXParser();
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InputStream in = configuration.getBuilderXML();
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saxParser.parse(in, this);
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return xmlElementsMap.get(root);
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} catch (Throwable t) {
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t.printStackTrace();
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throw new DocletAbortException();
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}
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public void startElement(String namespaceURI, String sName, String qName,
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Attributes attrs) throws SAXException {
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if (isParsing || qName.equals(currentRoot)) {
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isParsing = true;
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currentNode = new XMLNode(currentNode, qName);
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for (int i = 0; i < attrs.getLength(); i++)
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currentNode.attrs.put(attrs.getLocalName(i), attrs.getValue(i));
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if (qName.equals(currentRoot))
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xmlElementsMap.put(qName, currentNode);
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