# DirectorySourceFileLocator.java

    /*******************************************************************************
     * Copyright (c) 2009, 2013 Mountainminds GmbH & Co. KG and Contributors
     * All rights reserved. This program and the accompanying materials
     * are made available under the terms of the Eclipse Public License v1.0
     * which accompanies this distribution, and is available at
     * http://www.eclipse.org/legal/epl-v10.html
     *
     * Contributors:
     *    Marc R. Hoffmann - initial API and implementation
     *
     *******************************************************************************/
    package org.jacoco.report;

    import java.io.File;
    import java.io.FileInputStream;
    import java.io.IOException;
    import java.io.InputStream;

    /**
     * Locator for source files that picks source files from a given directory in
     * the file system.
     */
    public class DirectorySourceFileLocator extends InputStreamSourceFileLocator {

    	private final File directory;

    	/**
    	 * Creates a new locator that searches for source files in the given
    	 * directory.
    	 *
    	 * @param directory
    	 *            directory to search for source file
    	 * @param encoding
    	 *            encoding of the source files, <code>null</code> for platform
    	 *            default encoding
    	 * @param tabWidth
    	 *            tab width in source files as number of blanks
    	 *
    	 */
    	public DirectorySourceFileLocator(final File directory,
    			final String encoding, final int tabWidth) {
    		super(encoding, tabWidth);
    		this.directory = directory;
    	}

    	@Override
    	protected InputStream getSourceStream(final String path) throws IOException {
    		final File file = new File(directory, path);
    		if (file.exists()) {
    			return new FileInputStream(file);
    		} else {
    			return null;
    		}
    	}

    }