001/** 002 * 003 * Copyright © 2014 Florian Schmaus 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 java.io.IOException; 021 022import org.jivesoftware.smack.SmackException; 023import org.jivesoftware.smack.packet.Element; 024import org.jivesoftware.smack.util.ParserUtils; 025import org.xmlpull.v1.XmlPullParser; 026import org.xmlpull.v1.XmlPullParserException; 027 028public abstract class Provider<E extends Element> { 029 030 public final E parse(XmlPullParser parser) throws XmlPullParserException, IOException, SmackException { 031 // XPP3 calling convention assert: Parser should be at start tag 032 ParserUtils.assertAtStartTag(parser); 033 034 final int initialDepth = parser.getDepth(); 035 E e = parse(parser, initialDepth); 036 037 // XPP3 calling convention assert: Parser should be at end tag of the consumed/parsed element 038 ParserUtils.forwardToEndTagOfDepth(parser, initialDepth); 039 return e; 040 } 041 042 public abstract E parse(XmlPullParser parser, int initialDepth) throws XmlPullParserException, IOException, SmackException; 043}