Mercurial > hg4j
view src/org/tmatesoft/hg/core/ChangesetTransformer.java @ 403:2747b0723867
FIXMEs: work on exceptions and javadoc
author | Artem Tikhomirov <tikhomirov.artem@gmail.com> |
---|---|
date | Mon, 05 Mar 2012 14:50:51 +0100 |
parents | 2fadf8695f8a |
children | 528b6780a8bd |
line wrap: on
line source
/* * Copyright (c) 2011 TMate Software Ltd * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * For information on how to redistribute this software under * the terms of a license other than GNU General Public License * contact TMate Software at support@hg4j.com */ package org.tmatesoft.hg.core; import java.util.Set; import org.tmatesoft.hg.repo.HgChangelog; import org.tmatesoft.hg.repo.HgChangelog.RawChangeset; import org.tmatesoft.hg.repo.HgRepository; import org.tmatesoft.hg.repo.HgStatusCollector; import org.tmatesoft.hg.util.CancelSupport; import org.tmatesoft.hg.util.CancelledException; import org.tmatesoft.hg.util.PathPool; import org.tmatesoft.hg.util.PathRewrite; import org.tmatesoft.hg.util.ProgressSupport; /** * Bridges {@link HgChangelog.RawChangeset} with high-level {@link HgChangeset} API * FIXME move to .internal once access to package-local HgChangeset cons is resolved * * @author Artem Tikhomirov * @author TMate Software Ltd. */ /*package-local*/ class ChangesetTransformer implements HgChangelog.Inspector { private final HgChangesetHandler handler; private final ProgressSupport progressHelper; private final CancelSupport cancelHelper; private final Transformation t; private Set<String> branches; private HgCallbackTargetException failure; private CancelledException cancellation; // repo and delegate can't be null, parent walker can // ps and cs can't be null public ChangesetTransformer(HgRepository hgRepo, HgChangesetHandler delegate, HgChangelog.ParentWalker pw, ProgressSupport ps, CancelSupport cs) { if (hgRepo == null || delegate == null) { throw new IllegalArgumentException(); } if (ps == null || cs == null) { throw new IllegalArgumentException(); } HgStatusCollector statusCollector = new HgStatusCollector(hgRepo); t = new Transformation(statusCollector, pw); handler = delegate; cancelHelper = cs; progressHelper = ps; } public void next(int revisionNumber, Nodeid nodeid, RawChangeset cset) { if (failure != null || cancellation != null) { return; // FIXME need a better way to stop iterating revlog } if (branches != null && !branches.contains(cset.branch())) { return; } HgChangeset changeset = t.handle(revisionNumber, nodeid, cset); try { handler.next(changeset); progressHelper.worked(1); cancelHelper.checkCancelled(); } catch (RuntimeException ex) { failure = new HgCallbackTargetException(ex).setRevision(nodeid).setRevisionIndex(revisionNumber); } catch (CancelledException ex) { cancellation = ex; } } public void checkFailure() throws HgCallbackTargetException, CancelledException { if (failure != null) { HgCallbackTargetException toThrow = failure; failure = null; // just in (otherwise unexpected) case this instance would get reused throw toThrow; } if (cancellation != null) { CancelledException toThrow = cancellation; cancellation = null; throw toThrow; } } public void limitBranches(Set<String> branches) { this.branches = branches; } // part relevant to RawChangeset->HgChangeset transformation static class Transformation { private final HgChangeset changeset; public Transformation(HgStatusCollector statusCollector, HgChangelog.ParentWalker pw) { // files listed in a changeset don't need their names to be rewritten (they are normalized already) PathPool pp = new PathPool(new PathRewrite.Empty()); statusCollector.setPathPool(pp); changeset = new HgChangeset(statusCollector, pp); changeset.setParentHelper(pw); } // FIXME document instance reuse policy HgChangeset handle(int revisionNumber, Nodeid nodeid, RawChangeset cset) { changeset.init(revisionNumber, nodeid, cset); return changeset; } } }