tikhomirov@64: /*
tikhomirov@64:  * Copyright (c) 2011 TMate Software Ltd
tikhomirov@64:  *  
tikhomirov@64:  * This program is free software; you can redistribute it and/or modify
tikhomirov@64:  * it under the terms of the GNU General Public License as published by
tikhomirov@64:  * the Free Software Foundation; version 2 of the License.
tikhomirov@64:  *
tikhomirov@64:  * This program is distributed in the hope that it will be useful,
tikhomirov@64:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
tikhomirov@64:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
tikhomirov@64:  * GNU General Public License for more details.
tikhomirov@64:  *
tikhomirov@64:  * For information on how to redistribute this software under
tikhomirov@64:  * the terms of a license other than GNU General Public License
tikhomirov@102:  * contact TMate Software at support@hg4j.com
tikhomirov@64:  */
tikhomirov@64: package org.tmatesoft.hg.core;
tikhomirov@64: 
tikhomirov@74: import static org.tmatesoft.hg.repo.HgRepository.TIP;
tikhomirov@64: 
tikhomirov@64: import java.util.Calendar;
tikhomirov@64: import java.util.Collections;
tikhomirov@64: import java.util.ConcurrentModificationException;
tikhomirov@64: import java.util.LinkedList;
tikhomirov@64: import java.util.List;
tikhomirov@64: import java.util.Set;
tikhomirov@64: import java.util.TreeSet;
tikhomirov@64: 
tikhomirov@154: import org.tmatesoft.hg.repo.HgChangelog.RawChangeset;
tikhomirov@129: import org.tmatesoft.hg.repo.HgChangelog;
tikhomirov@80: import org.tmatesoft.hg.repo.HgDataFile;
tikhomirov@74: import org.tmatesoft.hg.repo.HgRepository;
tikhomirov@94: import org.tmatesoft.hg.repo.HgStatusCollector;
tikhomirov@133: import org.tmatesoft.hg.util.Path;
tikhomirov@64: import org.tmatesoft.hg.util.PathPool;
tikhomirov@142: import org.tmatesoft.hg.util.PathRewrite;
tikhomirov@64: 
tikhomirov@64: 
tikhomirov@64: /**
tikhomirov@131:  * Access to changelog, 'hg log' command counterpart.
tikhomirov@131:  * 
tikhomirov@64:  * <pre>
tikhomirov@131:  * Usage:
tikhomirov@70:  *   new LogCommand().limit(20).branch("maintenance-2.1").user("me").execute(new MyHandler());
tikhomirov@64:  * </pre>
tikhomirov@131:  * Not thread-safe (each thread has to use own {@link HgLogCommand} instance).
tikhomirov@64:  * 
tikhomirov@64:  * @author Artem Tikhomirov
tikhomirov@64:  * @author TMate Software Ltd.
tikhomirov@64:  */
tikhomirov@131: public class HgLogCommand implements HgChangelog.Inspector {
tikhomirov@64: 
tikhomirov@64: 	private final HgRepository repo;
tikhomirov@64: 	private Set<String> users;
tikhomirov@64: 	private Set<String> branches;
tikhomirov@64: 	private int limit = 0, count = 0;
tikhomirov@64: 	private int startRev = 0, endRev = TIP;
tikhomirov@64: 	private Handler delegate;
tikhomirov@64: 	private Calendar date;
tikhomirov@77: 	private Path file;
tikhomirov@80: 	private boolean followHistory; // makes sense only when file != null
tikhomirov@129: 	private HgChangeset changeset;
tikhomirov@80: 	
tikhomirov@131: 	public HgLogCommand(HgRepository hgRepo) {
tikhomirov@107: 		repo = hgRepo;
tikhomirov@64: 	}
tikhomirov@64: 
tikhomirov@64: 	/**
tikhomirov@148: 	 * Limit search to specified user. Multiple user names may be specified. Once set, user names can't be 
tikhomirov@148: 	 * cleared, use new command instance in such cases.
tikhomirov@64: 	 * @param user - full or partial name of the user, case-insensitive, non-null.
tikhomirov@64: 	 * @return <code>this</code> instance for convenience
tikhomirov@148: 	 * @throws IllegalArgumentException when argument is null
tikhomirov@64: 	 */
tikhomirov@131: 	public HgLogCommand user(String user) {
tikhomirov@64: 		if (user == null) {
tikhomirov@64: 			throw new IllegalArgumentException();
tikhomirov@64: 		}
tikhomirov@64: 		if (users == null) {
tikhomirov@64: 			users = new TreeSet<String>();
tikhomirov@64: 		}
tikhomirov@64: 		users.add(user.toLowerCase());
tikhomirov@64: 		return this;
tikhomirov@64: 	}
tikhomirov@64: 
tikhomirov@64: 	/**
tikhomirov@64: 	 * Limit search to specified branch. Multiple branch specification possible (changeset from any of these 
tikhomirov@148: 	 * would be included in result). If unspecified, all branches are considered. There's no way to clean branch selection 
tikhomirov@148: 	 * once set, create fresh new command instead.
tikhomirov@64: 	 * @param branch - branch name, case-sensitive, non-null.
tikhomirov@64: 	 * @return <code>this</code> instance for convenience
tikhomirov@148: 	 * @throws IllegalArgumentException when branch argument is null
tikhomirov@64: 	 */
tikhomirov@131: 	public HgLogCommand branch(String branch) {
tikhomirov@64: 		if (branch == null) {
tikhomirov@64: 			throw new IllegalArgumentException();
tikhomirov@64: 		}
tikhomirov@64: 		if (branches == null) {
tikhomirov@64: 			branches = new TreeSet<String>();
tikhomirov@64: 		}
tikhomirov@64: 		branches.add(branch);
tikhomirov@64: 		return this;
tikhomirov@64: 	}
tikhomirov@64: 	
tikhomirov@64: 	// limit search to specific date
tikhomirov@64: 	// multiple?
tikhomirov@131: 	public HgLogCommand date(Calendar date) {
tikhomirov@64: 		this.date = date;
tikhomirov@64: 		// FIXME implement
tikhomirov@64: 		// isSet(field) - false => don't use in detection of 'same date'
tikhomirov@64: 		throw HgRepository.notImplemented();
tikhomirov@64: 	}
tikhomirov@64: 	
tikhomirov@64: 	/**
tikhomirov@64: 	 * 
tikhomirov@64: 	 * @param num - number of changeset to produce. Pass 0 to clear the limit. 
tikhomirov@64: 	 * @return <code>this</code> instance for convenience
tikhomirov@64: 	 */
tikhomirov@131: 	public HgLogCommand limit(int num) {
tikhomirov@64: 		limit = num;
tikhomirov@64: 		return this;
tikhomirov@64: 	}
tikhomirov@64: 
tikhomirov@64: 	/**
tikhomirov@64: 	 * Limit to specified subset of Changelog, [min(rev1,rev2), max(rev1,rev2)], inclusive.
tikhomirov@64: 	 * Revision may be specified with {@link HgRepository#TIP}  
tikhomirov@148: 	 * @param rev1 - local revision number
tikhomirov@148: 	 * @param rev2 - local revision number
tikhomirov@64: 	 * @return <code>this</code> instance for convenience
tikhomirov@64: 	 */
tikhomirov@131: 	public HgLogCommand range(int rev1, int rev2) {
tikhomirov@64: 		if (rev1 != TIP && rev2 != TIP) {
tikhomirov@64: 			startRev = rev2 < rev1 ? rev2 : rev1;
tikhomirov@64: 			endRev = startRev == rev2 ? rev1 : rev2;
tikhomirov@64: 		} else if (rev1 == TIP && rev2 != TIP) {
tikhomirov@64: 			startRev = rev2;
tikhomirov@64: 			endRev = rev1;
tikhomirov@64: 		} else {
tikhomirov@64: 			startRev = rev1;
tikhomirov@64: 			endRev = rev2;
tikhomirov@64: 		}
tikhomirov@64: 		return this;
tikhomirov@64: 	}
tikhomirov@64: 	
tikhomirov@77: 	/**
tikhomirov@77: 	 * Visit history of a given file only.
tikhomirov@77: 	 * @param file path relative to repository root. Pass <code>null</code> to reset.
tikhomirov@80: 	 * @param followCopyRename true to report changesets of the original file(-s), if copy/rename ever occured to the file. 
tikhomirov@77: 	 */
tikhomirov@131: 	public HgLogCommand file(Path file, boolean followCopyRename) {
tikhomirov@77: 		// multiple? Bad idea, would need to include extra method into Handler to tell start of next file
tikhomirov@77: 		this.file = file;
tikhomirov@80: 		followHistory = followCopyRename;
tikhomirov@77: 		return this;
tikhomirov@64: 	}
tikhomirov@142: 	
tikhomirov@142: 	/**
tikhomirov@142: 	 * Handy analog of {@link #file(Path, boolean)} when clients' paths come from filesystem and need conversion to repository's 
tikhomirov@142: 	 */
tikhomirov@142: 	public HgLogCommand file(String file, boolean followCopyRename) {
tikhomirov@142: 		return file(Path.create(repo.getToRepoPathHelper().rewrite(file)), followCopyRename);
tikhomirov@142: 	}
tikhomirov@64: 
tikhomirov@64: 	/**
tikhomirov@154: 	 * Similar to {@link #execute(org.tmatesoft.hg.repo.RawChangeset.Inspector)}, collects and return result as a list.
tikhomirov@64: 	 */
tikhomirov@129: 	public List<HgChangeset> execute() {
tikhomirov@64: 		CollectHandler collector = new CollectHandler();
tikhomirov@64: 		execute(collector);
tikhomirov@64: 		return collector.getChanges();
tikhomirov@64: 	}
tikhomirov@64: 
tikhomirov@64: 	/**
tikhomirov@64: 	 * 
tikhomirov@64: 	 * @param inspector
tikhomirov@64: 	 * @throws IllegalArgumentException when inspector argument is null
tikhomirov@64: 	 * @throws ConcurrentModificationException if this log command instance is already running
tikhomirov@64: 	 */
tikhomirov@64: 	public void execute(Handler handler) {
tikhomirov@64: 		if (handler == null) {
tikhomirov@64: 			throw new IllegalArgumentException();
tikhomirov@64: 		}
tikhomirov@64: 		if (delegate != null) {
tikhomirov@64: 			throw new ConcurrentModificationException();
tikhomirov@64: 		}
tikhomirov@64: 		try {
tikhomirov@64: 			delegate = handler;
tikhomirov@64: 			count = 0;
tikhomirov@142: 			HgStatusCollector statusCollector = new HgStatusCollector(repo);
tikhomirov@142: 			// files listed in a changeset don't need their names to be rewritten (they are normalized already)
tikhomirov@142: 			PathPool pp = new PathPool(new PathRewrite.Empty());
tikhomirov@142: 			// #file(String, boolean) above may utilize PathPool as well. CommandContext?
tikhomirov@142: 			statusCollector.setPathPool(pp);
tikhomirov@142: 			changeset = new HgChangeset(statusCollector, pp);
tikhomirov@77: 			if (file == null) {
tikhomirov@77: 				repo.getChangelog().range(startRev, endRev, this);
tikhomirov@77: 			} else {
tikhomirov@80: 				HgDataFile fileNode = repo.getFileNode(file);
tikhomirov@80: 				fileNode.history(startRev, endRev, this);
tikhomirov@126: 				if (fileNode.isCopy()) {
tikhomirov@80: 					// even if we do not follow history, report file rename
tikhomirov@80: 					do {
tikhomirov@126: 						if (handler instanceof FileHistoryHandler) {
tikhomirov@126: 							FileRevision src = new FileRevision(repo, fileNode.getCopySourceRevision(), fileNode.getCopySourceName());
tikhomirov@126: 							FileRevision dst = new FileRevision(repo, fileNode.getRevision(0), fileNode.getPath());
tikhomirov@126: 							((FileHistoryHandler) handler).copy(src, dst);
tikhomirov@126: 						}
tikhomirov@80: 						if (limit > 0 && count >= limit) {
tikhomirov@80: 							// if limit reach, follow is useless.
tikhomirov@80: 							break;
tikhomirov@80: 						}
tikhomirov@80: 						if (followHistory) {
tikhomirov@126: 							fileNode = repo.getFileNode(fileNode.getCopySourceName());
tikhomirov@80: 							fileNode.history(this);
tikhomirov@80: 						}
tikhomirov@80: 					} while (followHistory && fileNode.isCopy());
tikhomirov@80: 				}
tikhomirov@77: 			}
tikhomirov@64: 		} finally {
tikhomirov@64: 			delegate = null;
tikhomirov@64: 			changeset = null;
tikhomirov@64: 		}
tikhomirov@64: 	}
tikhomirov@64: 
tikhomirov@64: 	//
tikhomirov@64: 	
tikhomirov@154: 	public void next(int revisionNumber, Nodeid nodeid, RawChangeset cset) {
tikhomirov@64: 		if (limit > 0 && count >= limit) {
tikhomirov@64: 			return;
tikhomirov@64: 		}
tikhomirov@64: 		if (branches != null && !branches.contains(cset.branch())) {
tikhomirov@64: 			return;
tikhomirov@64: 		}
tikhomirov@64: 		if (users != null) {
tikhomirov@64: 			String csetUser = cset.user().toLowerCase();
tikhomirov@64: 			boolean found = false;
tikhomirov@64: 			for (String u : users) {
tikhomirov@64: 				if (csetUser.indexOf(u) != -1) {
tikhomirov@64: 					found = true;
tikhomirov@64: 					break;
tikhomirov@64: 				}
tikhomirov@64: 			}
tikhomirov@64: 			if (!found) {
tikhomirov@64: 				return;
tikhomirov@64: 			}
tikhomirov@64: 		}
tikhomirov@64: 		if (date != null) {
tikhomirov@64: 			// FIXME
tikhomirov@64: 		}
tikhomirov@64: 		count++;
tikhomirov@64: 		changeset.init(revisionNumber, nodeid, cset);
tikhomirov@64: 		delegate.next(changeset);
tikhomirov@64: 	}
tikhomirov@64: 
tikhomirov@64: 	public interface Handler {
tikhomirov@64: 		/**
tikhomirov@129: 		 * @param changeset not necessarily a distinct instance each time, {@link HgChangeset#clone() clone()} if need a copy.
tikhomirov@64: 		 */
tikhomirov@129: 		void next(HgChangeset changeset);
tikhomirov@64: 	}
tikhomirov@64: 	
tikhomirov@80: 	/**
tikhomirov@131: 	 * When {@link HgLogCommand} is executed against file, handler passed to {@link HgLogCommand#execute(Handler)} may optionally
tikhomirov@80: 	 * implement this interface to get information about file renames. Method {@link #copy(FileRevision, FileRevision)} would
tikhomirov@129: 	 * get invoked prior any changeset of the original file (if file history being followed) is reported via {@link #next(HgChangeset)}.
tikhomirov@80: 	 * 
tikhomirov@131: 	 * For {@link HgLogCommand#file(Path, boolean)} with renamed file path and follow argument set to false, 
tikhomirov@80: 	 * {@link #copy(FileRevision, FileRevision)} would be invoked for the first copy/rename in the history of the file, but not 
tikhomirov@80: 	 * followed by any changesets. 
tikhomirov@80: 	 *
tikhomirov@80: 	 * @author Artem Tikhomirov
tikhomirov@80: 	 * @author TMate Software Ltd.
tikhomirov@80: 	 */
tikhomirov@80: 	public interface FileHistoryHandler extends Handler {
tikhomirov@80: 		// XXX perhaps, should distinguish copy from rename? And what about merged revisions and following them?
tikhomirov@80: 		void copy(FileRevision from, FileRevision to);
tikhomirov@80: 	}
tikhomirov@80: 	
tikhomirov@64: 	public static class CollectHandler implements Handler {
tikhomirov@129: 		private final List<HgChangeset> result = new LinkedList<HgChangeset>();
tikhomirov@64: 
tikhomirov@129: 		public List<HgChangeset> getChanges() {
tikhomirov@64: 			return Collections.unmodifiableList(result);
tikhomirov@64: 		}
tikhomirov@64: 
tikhomirov@129: 		public void next(HgChangeset changeset) {
tikhomirov@64: 			result.add(changeset.clone());
tikhomirov@64: 		}
tikhomirov@64: 	}
tikhomirov@64: 
tikhomirov@64: 	public static final class FileRevision {
tikhomirov@64: 		private final HgRepository repo;
tikhomirov@64: 		private final Nodeid revision;
tikhomirov@64: 		private final Path path;
tikhomirov@64: 		
tikhomirov@80: 		/*package-local*/FileRevision(HgRepository hgRepo, Nodeid rev, Path p) {
tikhomirov@64: 			if (hgRepo == null || rev == null || p == null) {
tikhomirov@148: 				// since it's package local, it is our code to blame for non validated arguments
tikhomirov@148: 				throw new HgBadStateException();
tikhomirov@64: 			}
tikhomirov@64: 			repo = hgRepo;
tikhomirov@64: 			revision = rev;
tikhomirov@64: 			path = p;
tikhomirov@64: 		}
tikhomirov@64: 		
tikhomirov@64: 		public Path getPath() {
tikhomirov@64: 			return path;
tikhomirov@64: 		}
tikhomirov@64: 		public Nodeid getRevision() {
tikhomirov@64: 			return revision;
tikhomirov@64: 		}
tikhomirov@64: 		public byte[] getContent() {
tikhomirov@64: 			// XXX Content wrapper, to allow formats other than byte[], e.g. Stream, DataAccess, etc?
tikhomirov@80: 			return repo.getFileNode(path).content(revision);
tikhomirov@64: 		}
tikhomirov@64: 	}
tikhomirov@64: }