001package org.apache.maven.model.building;
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.io.File;
023import java.io.FileInputStream;
024import java.io.IOException;
025import java.io.InputStream;
026import java.net.URI;
027
028/**
029 * Wraps an ordinary {@link File} as a model source.
030 * 
031 * @author Benjamin Bentmann
032 */
033public class FileModelSource
034    implements ModelSource2
035{
036    private final File pomFile;
037
038    /**
039     * Creates a new model source backed by the specified file.
040     * 
041     * @param pomFile The POM file, must not be {@code null}.
042     */
043    public FileModelSource( File pomFile )
044    {
045        if ( pomFile == null )
046        {
047            throw new IllegalArgumentException( "no POM file specified" );
048        }
049        this.pomFile = pomFile.getAbsoluteFile();
050    }
051
052    public InputStream getInputStream()
053        throws IOException
054    {
055        return new FileInputStream( pomFile );
056    }
057
058    public String getLocation()
059    {
060        return pomFile.getPath();
061    }
062
063    /**
064     * Gets the POM file of this model source.
065     * 
066     * @return The underlying POM file, never {@code null}.
067     */
068    public File getPomFile()
069    {
070        return pomFile;
071    }
072
073    @Override
074    public String toString()
075    {
076        return getLocation();
077    }
078
079    public ModelSource2 getRelatedSource( String relPath )
080    {
081        relPath = relPath.replace( '\\', File.separatorChar ).replace( '/', File.separatorChar );
082
083        File relatedPom = new File( pomFile.getParentFile(), relPath );
084
085        if ( relatedPom.isDirectory() )
086        {
087            // TODO figure out how to reuse ModelLocator.locatePom(File) here
088            relatedPom = new File( relatedPom, "pom.xml" );
089        }
090
091        if ( relatedPom.isFile() && relatedPom.canRead() )
092        {
093            return new FileModelSource( new File( relatedPom.toURI().normalize() ) );
094        }
095
096        return null;
097    }
098
099    public URI getLocationURI()
100    {
101        return pomFile.toURI();
102    }
103}