Make lookup methods on PackIndex public

There isn't a good reason to hide all of these as package-private.
Make them public so applications can inspect pack files.

Change-Id: Ia418daf65d63e9e015b8dafdf3d06a1ed91d190b

org.eclipse.jgit/src/org/eclipse/jgit/storage/file/PackIndex.java

@@ -183,7 +183,7 @@ public abstract class PackIndex implements Iterable<PackIndex.MutableEntry> {
 	 * @return number of objects in this index, and likewise in the associated
 	 *         pack that this index was generated from.
 	 */
-	abstract long getObjectCount();
+	public abstract long getObjectCount();
 
 	/**
 	 * Obtain the total number of objects needing 64 bit offsets.
@@ -191,7 +191,7 @@ public abstract class PackIndex implements Iterable<PackIndex.MutableEntry> {
 	 * @return number of objects in this index using a 64 bit offset; that is an
 	 *         object positioned after the 2 GB position within the file.
 	 */
-	abstract long getOffset64Count();
+	public abstract long getOffset64Count();
 
 	/**
 	 * Get ObjectId for the n-th object entry returned by {@link #iterator()}.
@@ -212,7 +212,7 @@ public abstract class PackIndex implements Iterable<PackIndex.MutableEntry> {
 	 *            {@link MutableEntry} is 0, the second is 1, etc.
 	 * @return the ObjectId for the corresponding entry.
 	 */
-	abstract ObjectId getObjectId(long nthPosition);
+	public abstract ObjectId getObjectId(long nthPosition);
 
 	/**
 	 * Get ObjectId for the n-th object entry returned by {@link #iterator()}.
@@ -234,7 +234,7 @@ public abstract class PackIndex implements Iterable<PackIndex.MutableEntry> {
 	 *            etc. Positions past 2**31-1 are negative, but still valid.
 	 * @return the ObjectId for the corresponding entry.
 	 */
-	final ObjectId getObjectId(final int nthPosition) {
+	public final ObjectId getObjectId(final int nthPosition) {
 		if (nthPosition >= 0)
 			return getObjectId((long) nthPosition);
 		final int u31 = nthPosition >>> 1;
@@ -251,7 +251,7 @@ public abstract class PackIndex implements Iterable<PackIndex.MutableEntry> {
 	 *         object does not exist in this index and is thus not stored in the
 	 *         associated pack.
 	 */
-	abstract long findOffset(AnyObjectId objId);
+	public abstract long findOffset(AnyObjectId objId);
 
 	/**
 	 * Retrieve stored CRC32 checksum of the requested object raw-data
@@ -265,17 +265,31 @@ public abstract class PackIndex implements Iterable<PackIndex.MutableEntry> {
 	 * @throws UnsupportedOperationException
 	 *             when this index doesn't support CRC32 checksum
 	 */
-	abstract long findCRC32(AnyObjectId objId) throws MissingObjectException,
+	public abstract long findCRC32(AnyObjectId objId)
-			UnsupportedOperationException;
+			throws MissingObjectException, UnsupportedOperationException;
 
 	/**
 	 * Check whether this index supports (has) CRC32 checksums for objects.
 	 *
 	 * @return true if CRC32 is stored, false otherwise
 	 */
-	abstract boolean hasCRC32Support();
+	public abstract boolean hasCRC32Support();
 
-	abstract void resolve(Set<ObjectId> matches, AbbreviatedObjectId id,
+	/**
+	 * Find objects matching the prefix abbreviation.
+	 *
+	 * @param matches
+	 *            set to add any located ObjectIds to. This is an output
+	 *            parameter.
+	 * @param id
+	 *            prefix to search for.
+	 * @param matchLimit
+	 *            maximum number of results to return. At most this many
+	 *            ObjectIds should be added to matches before returning.
+	 * @throws IOException
+	 *             the index cannot be read.
+	 */
+	public abstract void resolve(Set<ObjectId> matches, AbbreviatedObjectId id,
 			int matchLimit) throws IOException;
 
 	/**

org.eclipse.jgit/src/org/eclipse/jgit/storage/file/PackIndexV1.java

@@ -98,12 +98,13 @@ class PackIndexV1 extends PackIndex {
 		IO.readFully(fd, packChecksum, 0, packChecksum.length);
 	}
 
-	long getObjectCount() {
+	@Override
+	public long getObjectCount() {
 		return objectCnt;
 	}
 
 	@Override
-	long getOffset64Count() {
+	public long getOffset64Count() {
 		long n64 = 0;
 		for (final MutableEntry e : this) {
 			if (e.getOffset() >= Integer.MAX_VALUE)
@@ -113,7 +114,7 @@ class PackIndexV1 extends PackIndex {
 	}
 
 	@Override
-	ObjectId getObjectId(final long nthPosition) {
+	public ObjectId getObjectId(final long nthPosition) {
 		int levelOne = Arrays.binarySearch(idxHeader, nthPosition + 1);
 		long base;
 		if (levelOne >= 0) {
@@ -135,7 +136,8 @@ class PackIndexV1 extends PackIndex {
 		return ObjectId.fromRaw(idxdata[levelOne], dataIdx);
 	}
 
-	long findOffset(final AnyObjectId objId) {
+	@Override
+	public long findOffset(final AnyObjectId objId) {
 		final int levelOne = objId.getFirstByte();
 		byte[] data = idxdata[levelOne];
 		if (data == null)
@@ -161,22 +163,23 @@ class PackIndexV1 extends PackIndex {
 	}
 
 	@Override
-	long findCRC32(AnyObjectId objId) {
+	public long findCRC32(AnyObjectId objId) {
 		throw new UnsupportedOperationException();
 	}
 
 	@Override
-	boolean hasCRC32Support() {
+	public boolean hasCRC32Support() {
 		return false;
 	}
 
+	@Override
 	public Iterator<MutableEntry> iterator() {
 		return new IndexV1Iterator();
 	}
 
 	@Override
-	void resolve(Set<ObjectId> matches, AbbreviatedObjectId id, int matchLimit)
+	public void resolve(Set<ObjectId> matches, AbbreviatedObjectId id,
-			throws IOException {
+			int matchLimit) throws IOException {
 		byte[] data = idxdata[id.getFirstByte()];
 		if (data == null)
 			return;

org.eclipse.jgit/src/org/eclipse/jgit/storage/file/PackIndexV2.java

@@ -161,17 +161,17 @@ class PackIndexV2 extends PackIndex {
 	}
 
 	@Override
-	long getObjectCount() {
+	public long getObjectCount() {
 		return objectCnt;
 	}
 
 	@Override
-	long getOffset64Count() {
+	public long getOffset64Count() {
 		return offset64.length / 8;
 	}
 
 	@Override
-	ObjectId getObjectId(final long nthPosition) {
+	public ObjectId getObjectId(final long nthPosition) {
 		int levelOne = Arrays.binarySearch(fanoutTable, nthPosition + 1);
 		long base;
 		if (levelOne >= 0) {
@@ -194,7 +194,7 @@ class PackIndexV2 extends PackIndex {
 	}
 
 	@Override
-	long findOffset(final AnyObjectId objId) {
+	public long findOffset(final AnyObjectId objId) {
 		final int levelOne = objId.getFirstByte();
 		final int levelTwo = binarySearchLevelTwo(objId, levelOne);
 		if (levelTwo == -1)
@@ -206,7 +206,7 @@ class PackIndexV2 extends PackIndex {
 	}
 
 	@Override
-	long findCRC32(AnyObjectId objId) throws MissingObjectException {
+	public long findCRC32(AnyObjectId objId) throws MissingObjectException {
 		final int levelOne = objId.getFirstByte();
 		final int levelTwo = binarySearchLevelTwo(objId, levelOne);
 		if (levelTwo == -1)
@@ -215,17 +215,18 @@ class PackIndexV2 extends PackIndex {
 	}
 
 	@Override
-	boolean hasCRC32Support() {
+	public boolean hasCRC32Support() {
 		return true;
 	}
 
+	@Override
 	public Iterator<MutableEntry> iterator() {
 		return new EntriesIteratorV2();
 	}
 
 	@Override
-	void resolve(Set<ObjectId> matches, AbbreviatedObjectId id, int matchLimit)
+	public void resolve(Set<ObjectId> matches, AbbreviatedObjectId id,
-			throws IOException {
+			int matchLimit) throws IOException {
 		int[] data = names[id.getFirstByte()];
 		int max = offset32[id.getFirstByte()].length >>> 2;
 		int high = max;