dfs: rename ReftableStack to DfsReftableStack

The functionality in ReftableStack is specific to DFS.

Signed-off-by: Han-Wen Nienhuys <hanwen@google.com>
Change-Id: If6003d104b1ecb0f3ca7e9c3815b233fa0abf077

org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/dfs/DfsGarbageCollector.java

@@ -744,7 +744,7 @@ public class DfsGarbageCollector {
 			return;
 		}
 
-		try (ReftableStack stack = ReftableStack.open(ctx, reftablesBefore)) {
+		try (DfsReftableStack stack = DfsReftableStack.open(ctx, reftablesBefore)) {
 			ReftableCompactor compact = new ReftableCompactor();
 			compact.addAll(stack.readers());
 			compact.setIncludeDeletes(includeDeletes);

org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/dfs/DfsPackCompactor.java

@@ -311,7 +311,7 @@ public class DfsPackCompactor {
 		DfsObjDatabase objdb = repo.getObjectDatabase();
 		Collections.sort(srcReftables, objdb.reftableComparator());
 
-		try (ReftableStack stack = ReftableStack.open(ctx, srcReftables)) {
+		try (DfsReftableStack stack = DfsReftableStack.open(ctx, srcReftables)) {
 			initOutDesc(objdb);
 			ReftableCompactor compact = new ReftableCompactor();
 			compact.addAll(stack.readers());

org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/dfs/DfsReftableDatabase.java

@@ -85,7 +85,7 @@ public class DfsReftableDatabase extends DfsRefDatabase {
 
 	private DfsReader ctx;
 
-	private ReftableStack tableStack;
+	private DfsReftableStack tableStack;
 
 	private MergedReftable mergedTables;
 
@@ -173,7 +173,7 @@ public class DfsReftableDatabase extends DfsRefDatabase {
 	 * @throws java.io.IOException
 	 *             if tables cannot be opened.
 	 */
-	protected ReftableStack stack() throws IOException {
+	protected DfsReftableStack stack() throws IOException {
 		lock.lock();
 		try {
 			if (tableStack == null) {
@@ -181,7 +181,7 @@ public class DfsReftableDatabase extends DfsRefDatabase {
 				if (ctx == null) {
 					ctx = odb.newReader();
 				}
-				tableStack = ReftableStack.open(ctx,
+				tableStack = DfsReftableStack.open(ctx,
 						Arrays.asList(odb.getReftables()));
 			}
 			return tableStack;

org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/dfs/DfsReftableStack.java

@@ -54,7 +54,7 @@ import org.eclipse.jgit.internal.storage.reftable.Reftable;
  * Tracks multiple open
  * {@link org.eclipse.jgit.internal.storage.reftable.Reftable} instances.
  */
-public class ReftableStack implements AutoCloseable {
+public class DfsReftableStack implements AutoCloseable {
 	/**
 	 * Opens a stack of tables for reading.
 	 *
@@ -67,9 +67,9 @@ public class ReftableStack implements AutoCloseable {
 	 * @throws java.io.IOException
 	 *             a table could not be opened
 	 */
-	public static ReftableStack open(DfsReader ctx, List<DfsReftable> files)
+	public static DfsReftableStack open(DfsReader ctx, List<DfsReftable> files)
 			throws IOException {
-		ReftableStack stack = new ReftableStack(files.size());
+		DfsReftableStack stack = new DfsReftableStack(files.size());
 		boolean close = true;
 		try {
 			for (DfsReftable t : files) {
@@ -88,7 +88,7 @@ public class ReftableStack implements AutoCloseable {
 	private final List<DfsReftable> files;
 	private final List<Reftable> tables;
 
-	private ReftableStack(int tableCnt) {
+	private DfsReftableStack(int tableCnt) {
 		this.files = new ArrayList<>(tableCnt);
 		this.tables = new ArrayList<>(tableCnt);
 	}

org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/dfs/ReftableBatchRefUpdate.java

@@ -405,7 +405,7 @@ public class ReftableBatchRefUpdate extends BatchRefUpdate {
 
 	private boolean canCompactTopOfStack(ReftableConfig cfg)
 			throws IOException {
-		ReftableStack stack = refdb.stack();
+		DfsReftableStack stack = refdb.stack();
 		List<Reftable> readers = stack.readers();
 		if (readers.isEmpty()) {
 			return false;