Show changes to 4 files +618 −0
org.spearce.jgit/src/org/spearce/jgit/merge/MergeStrategy.java, org.spearce.jgit/src/org/spearce/jgit/merge/Merger.java, org.spearce.jgit/src/org/spearce/jgit/merge/StrategyOneSided.java, org.spearce.jgit/src/org/spearce/jgit/merge/StrategySimpleTwoWayInCore.java
diff --git a/org.spearce.jgit/src/org/spearce/jgit/merge/MergeStrategy.java b/org.spearce.jgit/src/org/spearce/jgit/merge/MergeStrategy.java
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index 0000000..d28dcc1
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+++ b/org.spearce.jgit/src/org/spearce/jgit/merge/MergeStrategy.java
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+/*
+ * Copyright (C) 2008, Google Inc.
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ *
+ * - Neither the name of the Git Development Community nor the
+ * names of its contributors may be used to endorse or promote
+ * products derived from this software without specific prior
+ * written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package org.spearce.jgit.merge;
+
+import java.util.HashMap;
+
+import org.spearce.jgit.lib.Repository;
+
+/**
+ * A method of combining two or more trees together to form an output tree.
+ * <p>
+ * Different strategies may employ different techniques for deciding which paths
+ * (and ObjectIds) to carry from the input trees into the final output tree.
+ */
+public abstract class MergeStrategy {
+ /** Simple strategy that sets the output tree to the first input tree. */
+ public static final MergeStrategy OURS = new StrategyOneSided("ours", 0);
+
+ /** Simple strategy that sets the output tree to the second input tree. */
+ public static final MergeStrategy THEIRS = new StrategyOneSided("theirs", 1);
+
+ /** Simple strategy to merge paths, without simultaneous edits. */
+ public static final MergeStrategy SIMPLE_TWO_WAY_IN_CORE = StrategySimpleTwoWayInCore.INSTANCE;
+
+ private static final HashMap<String, MergeStrategy> STRATEGIES = new HashMap<String, MergeStrategy>();
+
+ static {
+ register(OURS);
+ register(THEIRS);
+ register(SIMPLE_TWO_WAY_IN_CORE);
+ }
+
+ /**
+ * Register a merge strategy so it can later be obtained by name.
+ *
+ * @param imp
+ * the strategy to register.
+ * @throws IllegalArgumentException
+ * a strategy by the same name has already been registered.
+ */
+ public static void register(final MergeStrategy imp) {
+ register(imp.getName(), imp);
+ }
+
+ /**
+ * Register a merge strategy so it can later be obtained by name.
+ *
+ * @param name
+ * name the strategy can be looked up under.
+ * @param imp
+ * the strategy to register.
+ * @throws IllegalArgumentException
+ * a strategy by the same name has already been registered.
+ */
+ public static synchronized void register(final String name,
+ final MergeStrategy imp) {
+ if (STRATEGIES.containsKey(name))
+ throw new IllegalArgumentException("Merge strategy \"" + name
+ + "\" already exists as a default strategy");
+ STRATEGIES.put(name, imp);
+ }
+
+ /**
+ * Locate a strategy by name.
+ *
+ * @param name
+ * name of the strategy to locate.
+ * @return the strategy instance; null if no strategy matches the name.
+ */
+ public static synchronized MergeStrategy get(final String name) {
+ return STRATEGIES.get(name);
+ }
+
+ /**
+ * Get all registered strategies.
+ *
+ * @return the registered strategy instances. No inherit order is returned;
+ * the caller may modify (and/or sort) the returned array if
+ * necessary to obtain a reasonable ordering.
+ */
+ public static synchronized MergeStrategy[] get() {
+ final MergeStrategy[] r = new MergeStrategy[STRATEGIES.size()];
+ STRATEGIES.values().toArray(r);
+ return r;
+ }
+
+ /** @return default name of this strategy implementation. */
+ public abstract String getName();
+
+ /**
+ * Create a new merge instance.
+ *
+ * @param db
+ * repository database the merger will read from, and eventually
+ * write results back to.
+ * @return the new merge instance which implements this strategy.
+ */
+ public abstract Merger newMerger(Repository db);
+}
diff --git a/org.spearce.jgit/src/org/spearce/jgit/merge/Merger.java b/org.spearce.jgit/src/org/spearce/jgit/merge/Merger.java
new file mode 100644
index 0000000..fb8d7b2
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+++ b/org.spearce.jgit/src/org/spearce/jgit/merge/Merger.java
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+/*
+ * Copyright (C) 2008, Google Inc.
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ *
+ * - Neither the name of the Git Development Community nor the
+ * names of its contributors may be used to endorse or promote
+ * products derived from this software without specific prior
+ * written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package org.spearce.jgit.merge;
+
+import java.io.IOException;
+
+import org.spearce.jgit.errors.IncorrectObjectTypeException;
+import org.spearce.jgit.lib.AnyObjectId;
+import org.spearce.jgit.lib.Constants;
+import org.spearce.jgit.lib.ObjectId;
+import org.spearce.jgit.lib.ObjectWriter;
+import org.spearce.jgit.lib.Repository;
+import org.spearce.jgit.revwalk.RevCommit;
+import org.spearce.jgit.revwalk.RevObject;
+import org.spearce.jgit.revwalk.RevTree;
+import org.spearce.jgit.revwalk.RevWalk;
+import org.spearce.jgit.revwalk.filter.RevFilter;
+import org.spearce.jgit.treewalk.AbstractTreeIterator;
+import org.spearce.jgit.treewalk.CanonicalTreeParser;
+import org.spearce.jgit.treewalk.EmptyTreeIterator;
+
+/**
+ * Instance of a specific {@link MergeStrategy} for a single {@link Repository}.
+ */
+public abstract class Merger {
+ /** The repository this merger operates on. */
+ protected final Repository db;
+
+ /** A RevWalk for computing merge bases, or listing incoming commits. */
+ protected final RevWalk walk;
+
+ private ObjectWriter writer;
+
+ /** The original objects supplied in the merge; this can be any tree-ish. */
+ protected RevObject[] sourceObjects;
+
+ /** If {@link #sourceObjects}[i] is a commit, this is the commit. */
+ protected RevCommit[] sourceCommits;
+
+ /** The trees matching every entry in {@link #sourceObjects}. */
+ protected RevTree[] sourceTrees;
+
+ /**
+ * Create a new merge instance for a repository.
+ *
+ * @param local
+ * the repository this merger will read and write data on.
+ */
+ protected Merger(final Repository local) {
+ db = local;
+ walk = new RevWalk(db);
+ }
+
+ /**
+ * @return the repository this merger operates on.
+ */
+ public Repository getRepository() {
+ return db;
+ }
+
+ /**
+ * @return an object writer to create objects in {@link #getRepository()}.
+ */
+ public ObjectWriter getObjectWriter() {
+ if (writer == null)
+ writer = new ObjectWriter(getRepository());
+ return writer;
+ }
+
+ /**
+ * Merge together two or more tree-ish objects.
+ * <p>
+ * Any tree-ish may be supplied as inputs. Commits and/or tags pointing at
+ * trees or commits may be passed as input objects.
+ *
+ * @param tips
+ * source trees to be combined together. The merge base is not
+ * included in this set.
+ * @return true if the merge was completed without conflicts; false if the
+ * merge strategy cannot handle this merge or there were conflicts
+ * preventing it from automatically resolving all paths.
+ * @throws IncorrectObjectTypeException
+ * one of the input objects is not a commit, but the strategy
+ * requires it to be a commit.
+ * @throws IOException
+ * one or more sources could not be read, or outputs could not
+ * be written to the Repository.
+ */
+ public final boolean merge(final AnyObjectId[] tips) throws IOException {
+ sourceObjects = new RevObject[tips.length];
+ for (int i = 0; i < tips.length; i++)
+ sourceObjects[i] = walk.parseAny(tips[i]);
+
+ sourceCommits = new RevCommit[sourceObjects.length];
+ for (int i = 0; i < sourceObjects.length; i++) {
+ try {
+ sourceCommits[i] = walk.parseCommit(sourceObjects[i]);
+ } catch (IncorrectObjectTypeException err) {
+ sourceCommits[i] = null;
+ }
+ }
+
+ sourceTrees = new RevTree[sourceObjects.length];
+ for (int i = 0; i < sourceObjects.length; i++)
+ sourceTrees[i] = walk.parseTree(sourceObjects[i]);
+
+ return mergeImpl();
+ }
+
+ /**
+ * Create an iterator to walk the merge base of two commits.
+ *
+ * @param aIdx
+ * index of the first commit in {@link #sourceObjects}.
+ * @param bIdx
+ * index of the second commit in {@link #sourceObjects}.
+ * @return the new iterator
+ * @throws IncorrectObjectTypeException
+ * one of the input objects is not a commit.
+ * @throws IOException
+ * objects are missing or multiple merge bases were found.
+ */
+ protected AbstractTreeIterator mergeBase(final int aIdx, final int bIdx)
+ throws IOException {
+ if (sourceCommits[aIdx] == null)
+ throw new IncorrectObjectTypeException(sourceObjects[aIdx],
+ Constants.TYPE_COMMIT);
+ if (sourceCommits[bIdx] == null)
+ throw new IncorrectObjectTypeException(sourceObjects[bIdx],
+ Constants.TYPE_COMMIT);
+
+ walk.reset();
+ walk.setRevFilter(RevFilter.MERGE_BASE);
+ walk.markStart(sourceCommits[aIdx]);
+ walk.markStart(sourceCommits[bIdx]);
+ final RevCommit base = walk.next();
+ if (base == null)
+ return new EmptyTreeIterator();
+ final RevCommit base2 = walk.next();
+ if (base2 != null) {
+ throw new IOException("Multiple merge bases for:" + "\n "
+ + sourceCommits[aIdx].name() + "\n "
+ + sourceCommits[bIdx].name() + "found:" + "\n "
+ + base.name() + "\n " + base2.name());
+ }
+ return new CanonicalTreeParser(null, db, base.getTree());
+ }
+
+ /**
+ * Execute the merge.
+ * <p>
+ * This method is called from {@link #merge(AnyObjectId[])} after the
+ * {@link #sourceObjects}, {@link #sourceCommits} and {@link #sourceTrees}
+ * have been populated.
+ *
+ * @return true if the merge was completed without conflicts; false if the
+ * merge strategy cannot handle this merge or there were conflicts
+ * preventing it from automatically resolving all paths.
+ * @throws IncorrectObjectTypeException
+ * one of the input objects is not a commit, but the strategy
+ * requires it to be a commit.
+ * @throws IOException
+ * one or more sources could not be read, or outputs could not
+ * be written to the Repository.
+ */
+ protected abstract boolean mergeImpl() throws IOException;
+
+ /**
+ * @return resulting tree, if {@link #merge(AnyObjectId[])} returned true.
+ */
+ public abstract ObjectId getResultTreeId();
+}
diff --git a/org.spearce.jgit/src/org/spearce/jgit/merge/StrategyOneSided.java b/org.spearce.jgit/src/org/spearce/jgit/merge/StrategyOneSided.java
new file mode 100644
index 0000000..0c3dcc2
--- /dev/null
+++ b/org.spearce.jgit/src/org/spearce/jgit/merge/StrategyOneSided.java
@@ -0,0 +1,98 @@
+/*
+ * Copyright (C) 2008, Google Inc.
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ *
+ * - Neither the name of the Git Development Community nor the
+ * names of its contributors may be used to endorse or promote
+ * products derived from this software without specific prior
+ * written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package org.spearce.jgit.merge;
+
+import java.io.IOException;
+
+import org.spearce.jgit.lib.ObjectId;
+import org.spearce.jgit.lib.Repository;
+
+/**
+ * Trivial merge strategy to make the resulting tree exactly match an input.
+ * <p>
+ * This strategy can be used to cauterize an entire side branch of history, by
+ * setting the output tree to one of the inputs, and ignoring any of the paths
+ * of the other inputs.
+ */
+public class StrategyOneSided extends MergeStrategy {
+ private final String strategyName;
+
+ private final int treeIndex;
+
+ /**
+ * Create a new merge strategy to select a specific input tree.
+ *
+ * @param name
+ * name of this strategy.
+ * @param index
+ * the position of the input tree to accept as the result.
+ */
+ protected StrategyOneSided(final String name, final int index) {
+ strategyName = name;
+ treeIndex = index;
+ }
+
+ @Override
+ public String getName() {
+ return strategyName;
+ }
+
+ @Override
+ public Merger newMerger(final Repository db) {
+ return new OneSide(db, treeIndex);
+ }
+
+ protected static class OneSide extends Merger {
+ private final int treeIndex;
+
+ protected OneSide(final Repository local, final int index) {
+ super(local);
+ treeIndex = index;
+ }
+
+ @Override
+ protected boolean mergeImpl() throws IOException {
+ return treeIndex < sourceTrees.length;
+ }
+
+ @Override
+ public ObjectId getResultTreeId() {
+ return sourceTrees[treeIndex];
+ }
+ }
+}
diff --git a/org.spearce.jgit/src/org/spearce/jgit/merge/StrategySimpleTwoWayInCore.java b/org.spearce.jgit/src/org/spearce/jgit/merge/StrategySimpleTwoWayInCore.java
new file mode 100644
index 0000000..893add9
--- /dev/null
+++ b/org.spearce.jgit/src/org/spearce/jgit/merge/StrategySimpleTwoWayInCore.java
@@ -0,0 +1,179 @@
+/*
+ * Copyright (C) 2008, Google Inc.
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ *
+ * - Neither the name of the Git Development Community nor the
+ * names of its contributors may be used to endorse or promote
+ * products derived from this software without specific prior
+ * written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package org.spearce.jgit.merge;
+
+import java.io.IOException;
+
+import org.spearce.jgit.dircache.DirCache;
+import org.spearce.jgit.dircache.DirCacheBuilder;
+import org.spearce.jgit.dircache.DirCacheEntry;
+import org.spearce.jgit.errors.UnmergedPathException;
+import org.spearce.jgit.lib.ObjectId;
+import org.spearce.jgit.lib.Repository;
+import org.spearce.jgit.treewalk.AbstractTreeIterator;
+import org.spearce.jgit.treewalk.NameConflictTreeWalk;
+
+/**
+ * Merges two commits together in-memory, ignoring any working directory.
+ * <p>
+ * The strategy chooses a path from one of the two input trees if the path is
+ * unchanged in the other relative to their common merge base tree. This is a
+ * trivial 3-way merge (at the file path level only).
+ * <p>
+ * Modifications of the same file path (content and/or file mode) by both input
+ * trees will cause a merge conflict, as this strategy does not attempt to merge
+ * file contents.
+ */
+public class StrategySimpleTwoWayInCore extends MergeStrategy {
+ static final MergeStrategy INSTANCE = new StrategySimpleTwoWayInCore();
+
+ /** Create a new instance of the strategy. */
+ protected StrategySimpleTwoWayInCore() {
+ //
+ }
+
+ @Override
+ public String getName() {
+ return "simple-two-way-in-core";
+ }
+
+ @Override
+ public Merger newMerger(final Repository db) {
+ return new InCoreMerger(db);
+ }
+
+ private static class InCoreMerger extends Merger {
+ private static final int T_BASE = 0;
+
+ private static final int T_OURS = 1;
+
+ private static final int T_THEIRS = 2;
+
+ private final NameConflictTreeWalk tw;
+
+ private final DirCache cache;
+
+ private DirCacheBuilder builder;
+
+ private ObjectId resultTree;
+
+ InCoreMerger(final Repository local) {
+ super(local);
+ tw = new NameConflictTreeWalk(db);
+ cache = DirCache.newInCore();
+ }
+
+ @Override
+ protected boolean mergeImpl() throws IOException {
+ if (sourceTrees.length != 2)
+ return false;
+
+ tw.reset();
+ tw.addTree(mergeBase(0, 1));
+ tw.addTree(sourceTrees[0]);
+ tw.addTree(sourceTrees[1]);
+
+ boolean hasConflict = false;
+ builder = cache.builder();
+ while (tw.next()) {
+ final int modeO = tw.getRawMode(T_OURS);
+ final int modeT = tw.getRawMode(T_THEIRS);
+ if (modeO == modeT && tw.idEqual(T_OURS, T_THEIRS)) {
+ same();
+ continue;
+ }
+
+ final int modeB = tw.getRawMode(T_BASE);
+ if (modeB == modeO && tw.idEqual(T_BASE, T_OURS))
+ add(T_THEIRS, DirCacheEntry.STAGE_0);
+ else if (modeB == modeT && tw.idEqual(T_BASE, T_THEIRS))
+ add(T_OURS, DirCacheEntry.STAGE_0);
+ else {
+ conflict();
+ hasConflict = true;
+ }
+ }
+ builder.finish();
+ builder = null;
+
+ if (hasConflict)
+ return false;
+ try {
+ resultTree = cache.writeTree(getObjectWriter());
+ return true;
+ } catch (UnmergedPathException upe) {
+ resultTree = null;
+ return false;
+ }
+ }
+
+ private void same() throws IOException {
+ if (tw.isSubtree())
+ builder.addTree(tw.getRawPath(), db, tw.getObjectId(1));
+ else
+ add(T_OURS, DirCacheEntry.STAGE_0);
+ }
+
+ private void conflict() {
+ add(T_BASE, DirCacheEntry.STAGE_1);
+ add(T_OURS, DirCacheEntry.STAGE_2);
+ add(T_THEIRS, DirCacheEntry.STAGE_3);
+ }
+
+ private void add(final int tree, final int stage) {
+ final AbstractTreeIterator i = getTree(tree);
+ if (i != null) {
+ final DirCacheEntry e;
+
+ e = new DirCacheEntry(tw.getRawPath(), stage);
+ e.setObjectIdFromRaw(i.idBuffer(), i.idOffset());
+ e.setFileMode(tw.getFileMode(tree));
+ builder.add(e);
+ }
+ }
+
+ private AbstractTreeIterator getTree(final int tree) {
+ return tw.getTree(tree, AbstractTreeIterator.class);
+ }
+
+ @Override
+ public ObjectId getResultTreeId() {
+ return resultTree;
+ }
+ }
+}
Shawn O. Pearce