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 org.jivesoftware.smack.packet.Element; 021import org.jivesoftware.smack.util.ParserUtils; 022import org.xmlpull.v1.XmlPullParser; 023 024public abstract class Provider<E extends Element> { 025 026 public final E parse(XmlPullParser parser) throws Exception{ 027 // XPP3 calling convention assert: Parser should be at start tag 028 ParserUtils.assertAtStartTag(parser); 029 030 final int initialDepth = parser.getDepth(); 031 E e = parse(parser, initialDepth); 032 033 // XPP3 calling convention assert: Parser should be at end tag of the consumed/parsed element 034 ParserUtils.forwardToEndTagOfDepth(parser, initialDepth); 035 return e; 036 } 037 038 public abstract E parse(XmlPullParser parser, int initialDepth) throws Exception; 039}