--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hg4j/src/main/java/org/tmatesoft/hg/core/ChangesetTransformer.java	Tue May 10 10:52:53 2011 +0200
@@ -0,0 +1,65 @@
+/*
+ * 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.PathPool;
+import org.tmatesoft.hg.util.PathRewrite;
+
+/**
+ * Bridges {@link HgChangelog.RawChangeset} with high-level {@link HgChangeset} API
+ * 
+ * @author Artem Tikhomirov
+ * @author TMate Software Ltd.
+ */
+/*package-local*/ class ChangesetTransformer implements HgChangelog.Inspector {
+	private final HgChangesetHandler handler;
+	private final HgChangeset changeset;
+	private Set<String> branches;
+
+	// repo and delegate can't be null, parent walker can
+	public ChangesetTransformer(HgRepository hgRepo, HgChangesetHandler delegate, HgChangelog.ParentWalker pw) {
+		if (hgRepo == null || delegate == null) {
+			throw new IllegalArgumentException();
+		}
+		HgStatusCollector statusCollector = new HgStatusCollector(hgRepo);
+		// 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);
+		handler = delegate;
+	}
+	
+	public void next(int revisionNumber, Nodeid nodeid, RawChangeset cset) {
+		if (branches != null && !branches.contains(cset.branch())) {
+			return;
+		}
+
+		changeset.init(revisionNumber, nodeid, cset);
+		handler.next(changeset);
+	}
+	
+	public void limitBranches(Set<String> branches) {
+		this.branches = branches;
+	}
+}
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