Factor a base class out of ReceivePack

We are working on a publish/subscribe based git protocol, and we want to
reuse several parts of the ReceivePack-like code for reading commands
and processing a pack. In this new implementation, the connection
management will be very different, in particular, there may be multiple
packs received on a single open connection. So, hoist out as much as we
can from ReceivePack, mostly just leaving behind the single-connection
version in that class.

Change-Id: I5567aad6ae77951f73f59c1f91996d934ea88334

org.eclipse.jgit/src/org/eclipse/jgit/transport/AbstractAdvertiseRefsHook.java

@@ -63,7 +63,7 @@ public abstract class AbstractAdvertiseRefsHook implements AdvertiseRefsHook {
 				uploadPack.getRepository(), uploadPack.getRevWalk()));
 	}
 
-	public void advertiseRefs(ReceivePack receivePack)
+	public void advertiseRefs(BaseReceivePack receivePack)
 			throws ServiceMayNotContinueException {
 		Map<String, Ref> refs = getAdvertisedRefs(receivePack.getRepository(),
 				receivePack.getRevWalk());

org.eclipse.jgit/src/org/eclipse/jgit/transport/AdvertiseRefsHook.java

@@ -53,14 +53,14 @@ public interface AdvertiseRefsHook {
 	 * <p>
 	 * The method implementations do nothing to preserve the default behavior; see
 	 * {@link UploadPack#setAdvertisedRefs(java.util.Map)} and
-	 * {@link ReceivePack#setAdvertisedRefs(java.util.Map,java.util.Set)}.
+	 * {@link BaseReceivePack#setAdvertisedRefs(java.util.Map,java.util.Set)}.
 	 */
 	public static final AdvertiseRefsHook DEFAULT = new AdvertiseRefsHook() {
 		public void advertiseRefs(UploadPack uploadPack) {
 			// Do nothing.
 		}
 
-		public void advertiseRefs(ReceivePack receivePack) {
+		public void advertiseRefs(BaseReceivePack receivePack) {
 			// Do nothing.
 		}
 	};
@@ -81,11 +81,11 @@ public interface AdvertiseRefsHook {
 	 * Advertise refs for receive-pack.
 	 *
 	 * @param receivePack instance on which to call
-	 *            {@link ReceivePack#setAdvertisedRefs(java.util.Map,java.util.Set)}
+	 *            {@link BaseReceivePack#setAdvertisedRefs(java.util.Map,java.util.Set)}
 	 *            if necessary.
 	 * @throws ServiceMayNotContinueException
 	 *             abort; the message will be sent to the user.
 	 */
-	public void advertiseRefs(ReceivePack receivePack)
+	public void advertiseRefs(BaseReceivePack receivePack)
 			throws ServiceMayNotContinueException;
 }

org.eclipse.jgit/src/org/eclipse/jgit/transport/AdvertiseRefsHookChain.java

@@ -51,8 +51,8 @@ import java.util.List;
  * Hooks are run in the order passed to the constructor. A hook may inspect or
  * modify the results of the previous hooks in the chain by calling
  * {@link UploadPack#getAdvertisedRefs()}, or
- * {@link ReceivePack#getAdvertisedRefs()} or
+ * {@link BaseReceivePack#getAdvertisedRefs()} or
- * {@link ReceivePack#getAdvertisedObjects()}.
+ * {@link BaseReceivePack#getAdvertisedObjects()}.
  */
 public class AdvertiseRefsHookChain implements AdvertiseRefsHook {
 	private final AdvertiseRefsHook[] hooks;
@@ -79,7 +79,7 @@ public class AdvertiseRefsHookChain implements AdvertiseRefsHook {
 			return new AdvertiseRefsHookChain(newHooks, i);
 	}
 
-	public void advertiseRefs(ReceivePack rp)
+	public void advertiseRefs(BaseReceivePack rp)
 			throws ServiceMayNotContinueException {
 		for (int i = 0; i < count; i++)
 			hooks[i].advertiseRefs(rp);

org.eclipse.jgit/src/org/eclipse/jgit/transport/ReceiveCommand.java

@@ -54,7 +54,7 @@ import org.eclipse.jgit.lib.Ref;
 import org.eclipse.jgit.lib.RefUpdate;
 
 /**
- * A command being processed by {@link ReceivePack}.
+ * A command being processed by {@link BaseReceivePack}.
  * <p>
  * This command instance roughly translates to the server side representation of
  * the {@link RemoteRefUpdate} created by the client.
@@ -158,7 +158,7 @@ public class ReceiveCommand {
 	private String message;
 
 	/**
-	 * Create a new command for {@link ReceivePack}.
+	 * Create a new command for {@link BaseReceivePack}.
 	 *
 	 * @param oldId
 	 *            the old object id; must not be null. Use
@@ -184,7 +184,7 @@ public class ReceiveCommand {
 	}
 
 	/**
-	 * Create a new command for {@link ReceivePack}.
+	 * Create a new command for {@link BaseReceivePack}.
 	 *
 	 * @param oldId
 	 *            the old object id; must not be null. Use
@@ -273,7 +273,7 @@ public class ReceiveCommand {
 	 *            receive-pack session.
 	 * @since 2.0
 	 */
-	public void execute(final ReceivePack rp) {
+	public void execute(final BaseReceivePack rp) {
 		try {
 			final RefUpdate ru = rp.getRepository().updateRef(getRefName());
 			ru.setRefLogIdent(rp.getRefLogIdent());