tikhomirov@141: /*
tikhomirov@141:  * Copyright (c) 2011 TMate Software Ltd
tikhomirov@141:  *  
tikhomirov@141:  * This program is free software; you can redistribute it and/or modify
tikhomirov@141:  * it under the terms of the GNU General Public License as published by
tikhomirov@141:  * the Free Software Foundation; version 2 of the License.
tikhomirov@141:  *
tikhomirov@141:  * This program is distributed in the hope that it will be useful,
tikhomirov@141:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
tikhomirov@141:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
tikhomirov@141:  * GNU General Public License for more details.
tikhomirov@141:  *
tikhomirov@141:  * For information on how to redistribute this software under
tikhomirov@141:  * the terms of a license other than GNU General Public License
tikhomirov@141:  * contact TMate Software at support@hg4j.com
tikhomirov@141:  */
tikhomirov@141: package org.tmatesoft.hg.internal;
tikhomirov@141: 
tikhomirov@141: import java.io.File;
tikhomirov@141: 
tikhomirov@141: import org.tmatesoft.hg.util.PathRewrite;
tikhomirov@141: 
tikhomirov@141: /**
tikhomirov@141:  *
tikhomirov@141:  * @author Artem Tikhomirov
tikhomirov@141:  * @author TMate Software Ltd.
tikhomirov@141:  */
tikhomirov@141: public class RelativePathRewrite implements PathRewrite {
tikhomirov@141: 	
tikhomirov@141: 	private final String rootPath;
tikhomirov@141: 
tikhomirov@141: 	public RelativePathRewrite(File root) {
tikhomirov@141: 		this(root.getPath());
tikhomirov@141: 	}
tikhomirov@141: 	
tikhomirov@141: 	public RelativePathRewrite(String rootPath) {
tikhomirov@141: 		this.rootPath = rootPath;
tikhomirov@141: 	}
tikhomirov@141: 
tikhomirov@292: 	public CharSequence rewrite(CharSequence p) {
tikhomirov@292: 		String path = p == null ? null : p.toString();
tikhomirov@141: 		if (path != null && path.startsWith(rootPath)) {
tikhomirov@141: 			if (path.length() == rootPath.length()) {
tikhomirov@141: 				return "";
tikhomirov@141: 			}
tikhomirov@141: 			return path.substring(rootPath.length() + 1);
tikhomirov@141: 		}
tikhomirov@141: 		return path;
tikhomirov@141: 	}
tikhomirov@141: }