001/**
002 *
003 * Copyright 2003-2007 Jive Software.
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * You may obtain a copy of the License at
008 *
009 *     http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017
018package org.jivesoftware.smack.provider;
019
020import org.jivesoftware.smack.packet.IQ;
021import org.xmlpull.v1.XmlPullParser;
022
023/**
024 * An interface for parsing custom IQ packets. Each IQProvider must be registered with
025 * the ProviderManager class for it to be used. Every implementation of this
026 * interface <b>must</b> have a public, no-argument constructor.
027 *
028 * @author Matt Tucker
029 */
030public interface IQProvider {
031
032    /**
033     * Parse the IQ sub-document and create an IQ instance. Each IQ must have a
034     * single child element. At the beginning of the method call, the xml parser
035     * will be positioned at the opening tag of the IQ child element. At the end
036     * of the method call, the parser <b>must</b> be positioned on the closing tag
037     * of the child element.
038     *
039     * @param parser an XML parser.
040     * @return a new IQ instance.
041     * @throws Exception if an error occurs parsing the XML.
042     */
043    public IQ parseIQ(XmlPullParser parser) throws Exception;
044}