kitaev@213: /*
kitaev@213:  * Copyright (c) 2011 TMate Software Ltd
kitaev@213:  *  
kitaev@213:  * This program is free software; you can redistribute it and/or modify
kitaev@213:  * it under the terms of the GNU General Public License as published by
kitaev@213:  * the Free Software Foundation; version 2 of the License.
kitaev@213:  *
kitaev@213:  * This program is distributed in the hope that it will be useful,
kitaev@213:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
kitaev@213:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
kitaev@213:  * GNU General Public License for more details.
kitaev@213:  *
kitaev@213:  * For information on how to redistribute this software under
kitaev@213:  * the terms of a license other than GNU General Public License
kitaev@213:  * contact TMate Software at support@hg4j.com
kitaev@213:  */
kitaev@213: package org.tmatesoft.hg.util;
kitaev@213: 
kitaev@213: import java.util.LinkedList;
kitaev@213: import java.util.List;
kitaev@213: 
kitaev@213: /**
kitaev@213:  * File names often need transformations, like Windows-style path to Unix or human-readable data file name to storage location.  
kitaev@213:  * 
kitaev@213:  * @author Artem Tikhomirov
kitaev@213:  * @author TMate Software Ltd.
kitaev@213:  */
kitaev@213: public interface PathRewrite {
kitaev@213: 
kitaev@213: 	// XXX think over CharSequence use instead of String
kitaev@213: 	public String rewrite(String path);
kitaev@213: 	
kitaev@213: 	public static class Empty implements PathRewrite {
kitaev@213: 		public String rewrite(String path) {
kitaev@213: 			return path;
kitaev@213: 		}
kitaev@213: 	}
kitaev@213: 
kitaev@213: 	public class Composite implements PathRewrite {
kitaev@213: 		private List<PathRewrite> chain;
kitaev@213: 
kitaev@213: 		public Composite(PathRewrite... e) {
kitaev@213: 			LinkedList<PathRewrite> r = new LinkedList<PathRewrite>();
kitaev@213: 			for (int i = 0; e != null && i < e.length; i++) {
kitaev@213: 				r.addLast(e[i]);
kitaev@213: 			}
kitaev@213: 			chain = r;
kitaev@213: 		}
kitaev@213: 		public Composite chain(PathRewrite e) {
kitaev@213: 			chain.add(e);
kitaev@213: 			return this;
kitaev@213: 		}
kitaev@213: 
kitaev@213: 		public String rewrite(String path) {
kitaev@213: 			for (PathRewrite pr : chain) {
kitaev@213: 				path = pr.rewrite(path);
kitaev@213: 			}
kitaev@213: 			return path;
kitaev@213: 		}
kitaev@213: 	}
kitaev@213: }