1 files changed, 32 insertions, 4 deletions
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/PackIndex.java b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/PackIndex.java
index 7189ce20a6..b3e4efb4fc 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/PackIndex.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/PackIndex.java
@@ -286,7 +286,7 @@ public interface PackIndex
 	 *             the index cannot be read.
 	 */
 	void resolve(Set<ObjectId> matches, AbbreviatedObjectId id,
-			int matchLimit) throws IOException;
+				 int matchLimit) throws IOException;
 
 	/**
 	 * Get pack checksum
@@ -304,6 +304,7 @@ public interface PackIndex
 	class MutableEntry {
 		/** Buffer of the ObjectId visited by the EntriesIterator. */
 		final MutableObjectId idBuffer = new MutableObjectId();
+
 		/** Offset into the packfile of the current object. */
 		long offset;
 
@@ -345,6 +346,34 @@ public interface PackIndex
 			r.offset = offset;
 			return r;
 		}
+
+		/**
+		 * Similar to {@link Comparable#compareTo(Object)}, using only the
+		 * object id in the entry.
+		 *
+		 * @param other
+		 *            Another mutable entry (probably from another index)
+		 *
+		 * @return a negative integer, zero, or a positive integer as this
+		 *         object is less than, equal to, or greater than the specified
+		 *         object.
+		 */
+		public int compareBySha1To(MutableEntry other) {
+			return idBuffer.compareTo(other.idBuffer);
+		}
+
+		/**
+		 * Copy the current ObjectId to dest
+		 * <p>
+		 * Like {@link #toObjectId()}, but reusing the destination instead of
+		 * creating a new ObjectId instance.
+		 *
+		 * @param dest
+		 *            destination for the object id
+		 */
+		public void copyOidTo(MutableObjectId dest) {
+			dest.fromObjectId(idBuffer);
+		}
 	}
 
 	/**
@@ -368,7 +397,6 @@ public interface PackIndex
 			this.objectCount = objectCount;
 		}
 
-
 		@Override
 		public boolean hasNext() {
 			return returnedNumber < objectCount;
@@ -393,7 +421,6 @@ public interface PackIndex
 		 */
 		protected abstract void readNext();
 
-
 		/**
 		 * Copies to the entry an {@link ObjectId} from the int buffer and
 		 * position idx
@@ -423,7 +450,8 @@ public interface PackIndex
 		/**
 		 * Sets the {@code offset} to the entry
 		 *
-		 * @param offset the offset in the pack file
+		 * @param offset
+		 *            the offset in the pack file
 		 */
 		protected void setOffset(long offset) {
 			entry.offset = offset;