/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. * */ package org.apache.vysper.xmpp.parser; import java.io.IOException; import java.util.ArrayList; import java.util.List; import org.apache.mina.core.buffer.IoBuffer; import org.apache.vysper.charset.CharsetUtil; import org.apache.vysper.xml.decoder.DocumentContentHandler; import org.apache.vysper.xml.decoder.XMLElementListener; import org.apache.vysper.xml.fragment.XMLElement; import org.apache.vysper.xml.sax.NonBlockingXMLReader; import org.apache.vysper.xml.sax.impl.DefaultNonBlockingXMLReader; import org.xml.sax.SAXException; /** * * @author The Apache MINA Project (dev@mina.apache.org) */ public class XMLParserUtil { /** * Parses a complete XML document. If the XML string contains errors, a * {@link SAXException} will be trown. If the XML string is not a complete * XML document, null will be returned * @param xml A string with a complete XML document * @return * @throws IOException * @throws SAXException */ public static XMLElement parseDocument(String xml) throws IOException, SAXException { NonBlockingXMLReader reader = new DefaultNonBlockingXMLReader(); DocumentContentHandler contentHandler = new DocumentContentHandler(); reader.setContentHandler(contentHandler); final List<XMLElement> documents = new ArrayList<XMLElement>(); contentHandler.setListener(new XMLElementListener() { public void element(XMLElement element) { documents.add(element); } }); IoBuffer buffer = IoBuffer.wrap(xml.getBytes("UTF-8")); reader.parse(buffer, CharsetUtil.UTF8_DECODER); if(!documents.isEmpty()) { return documents.get(0); } else { return null; } } }