tikhomirov@616: /*
tikhomirov@616:  * Copyright (c) 2013 TMate Software Ltd
tikhomirov@616:  *  
tikhomirov@616:  * This program is free software; you can redistribute it and/or modify
tikhomirov@616:  * it under the terms of the GNU General Public License as published by
tikhomirov@616:  * the Free Software Foundation; version 2 of the License.
tikhomirov@616:  *
tikhomirov@616:  * This program is distributed in the hope that it will be useful,
tikhomirov@616:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
tikhomirov@616:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
tikhomirov@616:  * GNU General Public License for more details.
tikhomirov@616:  *
tikhomirov@616:  * For information on how to redistribute this software under
tikhomirov@616:  * the terms of a license other than GNU General Public License
tikhomirov@616:  * contact TMate Software at support@hg4j.com
tikhomirov@616:  */
tikhomirov@616: package org.tmatesoft.hg.internal;
tikhomirov@616: 
tikhomirov@616: import static org.tmatesoft.hg.internal.StoragePathHelper.STR_DATA;
tikhomirov@616: 
tikhomirov@616: import org.tmatesoft.hg.util.PathRewrite;
tikhomirov@616: 
tikhomirov@616: /**
tikhomirov@616:  * Prepare filelog names to be written into fncache. 
tikhomirov@616:  * 
tikhomirov@616:  * @see http://mercurial.selenic.com/wiki/fncacheRepoFormat#The_fncache_file
tikhomirov@616:  * @author Artem Tikhomirov
tikhomirov@616:  * @author TMate Software Ltd.
tikhomirov@616:  */
tikhomirov@616: final class FNCachePathHelper implements PathRewrite {
tikhomirov@616: 
tikhomirov@616: 	private final EncodeDirPathHelper dirPathRewrite;
tikhomirov@616: 
tikhomirov@616: 	
tikhomirov@616: 	public FNCachePathHelper() {
tikhomirov@616: 		dirPathRewrite = new EncodeDirPathHelper();
tikhomirov@616: 	}
tikhomirov@616: 
tikhomirov@616: 	/**
tikhomirov@616: 	 * Input: repository-relative path of a filelog, i.e. without 'data/' or 'dh/' prefix, and/or '.i'/'.d' suffix.
tikhomirov@616: 	 * Output: path ready to be written into fncache file, alaways with '.i' suffix (caller is free to alter the suffix to '.d' as appropriate
tikhomirov@616: 	 */
tikhomirov@616: 	public CharSequence rewrite(CharSequence path) {
tikhomirov@616: 		CharSequence p = dirPathRewrite.rewrite(path);
tikhomirov@616: 		StringBuilder result = new StringBuilder(p.length() + STR_DATA.length() + ".i".length());
tikhomirov@616: 		result.append(STR_DATA);
tikhomirov@616: 		result.append(p);
tikhomirov@616: 		result.append(".i");
tikhomirov@616: 		return result;
tikhomirov@616: 	}
tikhomirov@616: 
tikhomirov@616: 	/*
tikhomirov@616: 	 * There's always 'data/' prefix, even if actual file resides under 'dh/':
tikhomirov@616: 	 *  
tikhomirov@616: 	 * $ cat .hg/store/fncache
tikhomirov@616: 	 * data/very-long-directory-name-level-1/very-long-directory-name-level-2/very-long-directory-name-level-3/file-with-longest-name-i-am-not-lazy-to-type.txt.i
tikhomirov@616: 	 * $ ls .hg/store/dh/very-lon/very-lon/very-lon/
tikhomirov@616: 	 * file-with-longest-name-i-am-not-lazy-to-type.txtbbd4d3327f6364027211b0cd8ca499d3d6308849.i
tikhomirov@616: 	 */
tikhomirov@616: }