001package org.apache.maven.doxia.parser;
002
003/*
004 * Licensed to the Apache Software Foundation (ASF) under one
005 * or more contributor license agreements.  See the NOTICE file
006 * distributed with this work for additional information
007 * regarding copyright ownership.  The ASF licenses this file
008 * to you under the Apache License, Version 2.0 (the
009 * "License"); you may not use this file except in compliance
010 * with the License.  You may obtain a copy of the License at
011 *
012 *   http://www.apache.org/licenses/LICENSE-2.0
013 *
014 * Unless required by applicable law or agreed to in writing,
015 * software distributed under the License is distributed on an
016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017 * KIND, either express or implied.  See the License for the
018 * specific language governing permissions and limitations
019 * under the License.
020 */
021
022import org.apache.maven.doxia.logging.LogEnabled;
023import org.apache.maven.doxia.sink.Sink;
024
025import java.io.Reader;
026
027/**
028 * A Parser is responsible for parsing any document in a supported front-end
029 * format, and emitting the standard Doxia events, which can then be consumed
030 * by any Doxia Sink.
031 *
032 * @author <a href="mailto:jason@maven.org">Jason van Zyl</a>
033 * @version $Id$
034 * @since 1.0
035 */
036public interface Parser
037    extends LogEnabled
038{
039    /** The Plexus lookup role. */
040    String ROLE = Parser.class.getName();
041
042    /** Unknown parser type */
043    int UNKNOWN_TYPE = 0;
044
045    /** Text parser type */
046    int TXT_TYPE = 1;
047
048    /** XML parser type */
049    int XML_TYPE = 2;
050
051    /**
052     * Parses the given source model and emits Doxia events into the given sink.
053     *
054     * @param source not null reader that provides the source document.
055     * You could use <code>newReader</code> methods from {@link org.codehaus.plexus.util.ReaderFactory}.
056     * @param sink A sink that consumes the Doxia events.
057     * @throws org.apache.maven.doxia.parser.ParseException if the model could not be parsed.
058     */
059    void parse( Reader source, Sink sink )
060        throws ParseException;
061
062    /**
063     * The parser type value could be {@link #UNKNOWN_TYPE}, {@link #TXT_TYPE} or
064     * {@link #XML_TYPE}.
065     *
066     * @return the type of Parser
067     */
068    int getType();
069}