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.ByteArrayInputStream;
023import java.io.IOException;
024import java.io.InputStream;
025
026/**
027 * Wraps an ordinary {@link CharSequence} as a model source.
028 * 
029 * @author Benjamin Bentmann
030 */
031public class StringModelSource
032    implements ModelSource
033{
034
035    private String pom;
036
037    private String location;
038
039    /**
040     * Creates a new model source backed by the specified string.
041     * 
042     * @param pom The POM's string representation, may be empty or {@code null}.
043     */
044    public StringModelSource( CharSequence pom )
045    {
046        this( pom, null );
047    }
048
049    /**
050     * Creates a new model source backed by the specified string.
051     * 
052     * @param pom The POM's string representation, may be empty or {@code null}.
053     * @param location The location to report for this use, may be {@code null}.
054     */
055    public StringModelSource( CharSequence pom, String location )
056    {
057        this.pom = ( pom != null ) ? pom.toString() : "";
058        this.location = ( location != null ) ? location : "(memory)";
059    }
060
061    public InputStream getInputStream()
062        throws IOException
063    {
064        return new ByteArrayInputStream( pom.getBytes( "UTF-8" ) );
065    }
066
067    public String getLocation()
068    {
069        return location;
070    }
071
072    /**
073     * Gets the character sequence of this model source.
074     * 
075     * @return The underlying character stream, never {@code null}.
076     */
077    public String getModel()
078    {
079        return pom;
080    }
081
082    @Override
083    public String toString()
084    {
085        return getLocation();
086    }
087
088}