001package org.apache.maven.doxia.parser.module;
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 java.util.Collection;
023import java.util.LinkedHashMap;
024import java.util.Map;
025
026import org.codehaus.plexus.component.annotations.Component;
027import org.codehaus.plexus.component.annotations.Requirement;
028
029/**
030 * Simple implementation of the ParserModuleManager interface.
031 *
032 * @since 1.6
033 */
034@Component( role = ParserModuleManager.class )
035public class DefaultParserModuleManager
036    implements ParserModuleManager
037{
038    @SuppressWarnings( "MismatchedQueryAndUpdateOfCollection" )
039    @Requirement( role = ParserModule.class )
040    private Map<String, ParserModule> parserModules;
041
042    private Collection<ParserModule> parserModulesValues;
043
044    /**
045     * {@inheritDoc}
046     *
047     * @return a {@link java.util.Collection} object.
048     */
049    public Collection<ParserModule> getParserModules()
050    {
051        if ( parserModulesValues == null )
052        {
053            Map<Class<?>, ParserModule> parserModulesTmp = new LinkedHashMap<>();
054            for ( ParserModule module : parserModules.values() )
055            {
056                parserModulesTmp.put( module.getClass(), module );
057            }
058            parserModulesValues = parserModulesTmp.values();
059        }
060
061        return parserModulesValues;
062    }
063
064    /** {@inheritDoc} */
065    public ParserModule getParserModule( String id )
066        throws ParserModuleNotFoundException
067    {
068        ParserModule parserModule = parserModules.get( id );
069
070        if ( parserModule == null )
071        {
072            throw new ParserModuleNotFoundException( "Cannot find parser module id = " + id );
073        }
074
075        return parserModule;
076    }
077}