/*
* JBoss, Home of Professional Open Source
* Copyright 2013, Red Hat, Inc. and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.richfaces.demo.iteration;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.List;
import java.util.Locale;
import javax.swing.tree.TreeNode;
import org.richfaces.model.SwingTreeNodeImpl;
import org.richfaces.util.FastJoiner;
import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.InputSource;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.XMLReaderFactory;
import com.google.common.collect.Lists;
/**
* @author Nick Belaevski
*/
public class TreeNodeParser implements ContentHandler {
private static final FastJoiner JOINER = FastJoiner.on("");
private XMLReader reader;
private List<TreeNode> rootNodes = Lists.newArrayList();
private SwingTreeNodeImpl<String> currentNode;
public TreeNodeParser() throws SAXException {
reader = XMLReaderFactory.createXMLReader();
}
public void parse(URL url) throws IOException, SAXException {
InputStream is = null;
try {
is = url.openStream();
reader.setContentHandler(this);
reader.parse(new InputSource(is));
} finally {
try {
is.close();
} catch (IOException e) {
// Swallow
}
}
}
public List<TreeNode> getRootNodes() {
return rootNodes;
}
public void setDocumentLocator(Locator locator) {
}
public void startDocument() throws SAXException {
}
public void endDocument() throws SAXException {
}
public void startPrefixMapping(String prefix, String uri) throws SAXException {
}
public void endPrefixMapping(String prefix) throws SAXException {
}
public void startElement(String uri, String localName, String qName, Attributes atts) throws SAXException {
SwingTreeNodeImpl<String> newNode = new SwingTreeNodeImpl<String>();
if (currentNode == null) {
rootNodes.add(newNode);
} else {
currentNode.addChild(newNode);
}
newNode.setData(JOINER.join(newNode.getData(), localName.toLowerCase(Locale.US), " ["));
currentNode = newNode;
}
public void endElement(String uri, String localName, String qName) throws SAXException {
currentNode.setData(JOINER.join(currentNode.getData(), "]"));
currentNode = (SwingTreeNodeImpl) currentNode.getParent();
}
public void characters(char[] ch, int start, int length) throws SAXException {
currentNode.setData(JOINER.join(currentNode.getData(), new String(ch, start, length).trim()));
}
public void ignorableWhitespace(char[] ch, int start, int length) throws SAXException {
}
public void processingInstruction(String target, String data) throws SAXException {
}
public void skippedEntity(String name) throws SAXException {
}
}