# HG changeset patch
# User Artem Tikhomirov <tikhomirov.artem@gmail.com>
# Date 1307415253 -7200
# Node ID fd845a53f53dc52e56ffbbd913551a2a6b7bddfe
# Parent  b2cfbe46f9b62d1d661db920dd4e1591855ba356
Experimental access to working dir parents

diff -r b2cfbe46f9b6 -r fd845a53f53d cmdline/org/tmatesoft/hg/console/Main.java
--- a/cmdline/org/tmatesoft/hg/console/Main.java	Tue Jun 07 04:28:32 2011 +0200
+++ b/cmdline/org/tmatesoft/hg/console/Main.java	Tue Jun 07 04:54:13 2011 +0200
@@ -43,6 +43,7 @@
 import org.tmatesoft.hg.repo.HgStatusInspector;
 import org.tmatesoft.hg.repo.HgWorkingCopyStatusCollector;
 import org.tmatesoft.hg.repo.HgChangelog.RawChangeset;
+import org.tmatesoft.hg.util.Pair;
 import org.tmatesoft.hg.util.Path;
 
 /**
@@ -68,7 +69,8 @@
 
 	public static void main(String[] args) throws Exception {
 		Main m = new Main(args);
-		m.testEffectiveFileLog();
+		m.testParents();
+//		m.testEffectiveFileLog();
 //		m.testCatAtCsetRevision();
 //		m.testMergeState();
 //		m.testFileStatus();
@@ -83,6 +85,23 @@
 //		m.bunchOfTests();
 	}
 	
+	private void testParents() throws Exception {
+		// hg parents cmd
+		final Pair<Nodeid, Nodeid> wcParents = hgRepo.getWorkingCopyParents();
+		ChangesetDumpHandler dump = new ChangesetDumpHandler(hgRepo);
+		final HgChangelog clog = hgRepo.getChangelog();
+		HgLogCommand cmd = new HgLogCommand(hgRepo);
+		if (wcParents.hasFirst()) {
+			int x = clog.getLocalRevision(wcParents.first());
+			cmd.range(x, x).execute(dump); // FIXME HgLogCommand shall support Nodeid as revisions
+		}
+		if (wcParents.hasSecond()) {
+			int x = clog.getLocalRevision(wcParents.second());
+			cmd.range(x, x).execute(dump);
+		}
+	}
+	
+	// -R \temp\hg\hg4j-50 src/org/tmatesoft/hg/internal/RevlogStream.java
 	private void testEffectiveFileLog() {
 		for (String fname : cmdLineOpts.getList("")) {
 			System.out.println(fname);
diff -r b2cfbe46f9b6 -r fd845a53f53d src/org/tmatesoft/hg/repo/HgRepository.java
--- a/src/org/tmatesoft/hg/repo/HgRepository.java	Tue Jun 07 04:28:32 2011 +0200
+++ b/src/org/tmatesoft/hg/repo/HgRepository.java	Tue Jun 07 04:54:13 2011 +0200
@@ -16,6 +16,8 @@
  */
 package org.tmatesoft.hg.repo;
 
+import static org.tmatesoft.hg.core.Nodeid.NULL;
+
 import java.io.File;
 import java.io.IOException;
 import java.io.StringReader;
@@ -27,6 +29,7 @@
 import java.util.List;
 
 import org.tmatesoft.hg.core.HgDataStreamException;
+import org.tmatesoft.hg.core.Nodeid;
 import org.tmatesoft.hg.internal.ByteArrayChannel;
 import org.tmatesoft.hg.internal.ConfigFile;
 import org.tmatesoft.hg.internal.DataAccessProvider;
@@ -35,6 +38,7 @@
 import org.tmatesoft.hg.internal.RequiresFile;
 import org.tmatesoft.hg.internal.RevlogStream;
 import org.tmatesoft.hg.util.CancelledException;
+import org.tmatesoft.hg.util.Pair;
 import org.tmatesoft.hg.util.Path;
 import org.tmatesoft.hg.util.PathRewrite;
 import org.tmatesoft.hg.util.ProgressSupport;
@@ -219,6 +223,12 @@
 	public PathRewrite getToRepoPathHelper() {
 		return normalizePath;
 	}
+	
+	@Experimental(reason="return type and possible values (presently null, perhaps Nodeid.NULL) may get changed")
+	public Pair<Nodeid,Nodeid> getWorkingCopyParents() {
+		Nodeid[] p = loadDirstate().parents();
+		return new Pair<Nodeid,Nodeid>(NULL == p[0] ? null : p[0], NULL == p[1] ? null : p[1]);
+	}
 
 	// local to hide use of io.File. 
 	/*package-local*/ File getRepositoryRoot() {
diff -r b2cfbe46f9b6 -r fd845a53f53d src/org/tmatesoft/hg/util/Pair.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/org/tmatesoft/hg/util/Pair.java	Tue Jun 07 04:54:13 2011 +0200
@@ -0,0 +1,50 @@
+/*
+ * 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.util;
+
+import org.tmatesoft.hg.internal.Experimental;
+
+/**
+ * Nothing but a holder for two values.
+ * 
+ * @author Artem Tikhomirov
+ * @author TMate Software Ltd.
+ */
+@Experimental
+public final class Pair<T1,T2> {
+	private final T1 value1;
+	private final T2 value2;
+
+	public Pair(T1 v1, T2 v2) {
+		value1 = v1;
+		value2 = v2;
+	}
+
+	public T1 first() {
+		return value1;
+	}
+	public T2 second() {
+		return value2;
+	}
+	public boolean hasFirst() {
+		return value1 != null;
+	}
+	public boolean hasSecond() {
+		return value2 != null;
+	}
+}
+