001    package org.apache.maven.toolchain;
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    
022    import java.io.File;
023    import java.io.Reader;
024    
025    import org.apache.maven.toolchain.model.PersistedToolchains;
026    import org.apache.maven.toolchain.model.io.xpp3.MavenToolchainsXpp3Reader;
027    import org.codehaus.plexus.component.annotations.Component;
028    import org.codehaus.plexus.component.annotations.Requirement;
029    import org.codehaus.plexus.logging.Logger;
030    import org.codehaus.plexus.util.IOUtil;
031    import org.codehaus.plexus.util.ReaderFactory;
032    
033    /**
034     * @author Benjamin Bentmann
035     */
036    @Component( role = ToolchainsBuilder.class, hint = "default" )
037    public class DefaultToolchainsBuilder
038        implements ToolchainsBuilder
039    {
040    
041        @Requirement
042        private Logger logger;
043    
044        public PersistedToolchains build( File userToolchainsFile )
045            throws MisconfiguredToolchainException
046        {
047            PersistedToolchains toolchains = null;
048    
049            if ( userToolchainsFile != null && userToolchainsFile.isFile() )
050            {
051                Reader in = null;
052                try
053                {
054                    in = ReaderFactory.newXmlReader( userToolchainsFile );
055                    toolchains = new MavenToolchainsXpp3Reader().read( in );
056                }
057                catch ( Exception e )
058                {
059                    throw new MisconfiguredToolchainException( "Cannot read toolchains file at "
060                        + userToolchainsFile.getAbsolutePath(), e );
061                }
062                finally
063                {
064                    IOUtil.close( in );
065                }
066            }
067            else if ( userToolchainsFile != null )
068            {
069                logger.debug( "Toolchains configuration was not found at " + userToolchainsFile );
070            }
071    
072            return toolchains;
073        }
074    
075    }