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/**
 * $RCSfile$
 * $Revision: 7071 $
 * $Date: 2007-02-11 18:59:05 -0600 (Sun, 11 Feb 2007) $
 *
 * Copyright 2003-2007 Jive Software.
 *
 * All rights reserved. Licensed 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.jivesoftware.smack.provider;

import org.jivesoftware.smack.packet.IQ;
import org.xmlpull.v1.XmlPullParser;

/**
 * An interface for parsing custom IQ packets. Each IQProvider must be registered with
 * the ProviderManager class for it to be used. Every implementation of this
 * interface must have a public, no-argument constructor.
 *
 * @author Matt Tucker
 */
public interface IQProvider {

    /**
     * Parse the IQ sub-document and create an IQ instance. Each IQ must have a
     * single child element. At the beginning of the method call, the xml parser
     * will be positioned at the opening tag of the IQ child element. At the end
     * of the method call, the parser must be positioned on the closing tag
     * of the child element.
     *
     * @param parser an XML parser.
     * @return a new IQ instance.
     * @throws Exception if an error occurs parsing the XML.
     */
    public IQ parseIQ(XmlPullParser parser) throws Exception;
}