[PATCH JGit 02/19] Create abstract method on ObjectDatabase for accessing the list of local pack files.

[mr.gaffo@gmail.com]

From: mike.gaffney <mike.gaffney@asolutions.com>

Implemented the method for AlternateRepository database as a passthrough

Implemented the method for ObjectDirectory as a toList of the current
cached private PackList.

Hopefully this will allow easier reference to the list of packs for
others like the server side of fetch.
---
 .../jgit/lib/AlternateRepositoryDatabase.java      |    6 ++++++
 .../src/org/spearce/jgit/lib/ObjectDatabase.java   |   11 ++++++++++-
 .../src/org/spearce/jgit/lib/ObjectDirectory.java  |    5 +++++
 3 files changed, 21 insertions(+), 1 deletions(-)

diff --git a/org.spearce.jgit/src/org/spearce/jgit/lib/AlternateRepositoryDatabase.java b/org.spearce.jgit/src/org/spearce/jgit/lib/AlternateRepositoryDatabase.java
index ee4c4cf..68ad488 100644
--- a/org.spearce.jgit/src/org/spearce/jgit/lib/AlternateRepositoryDatabase.java
+++ b/org.spearce.jgit/src/org/spearce/jgit/lib/AlternateRepositoryDatabase.java
@@ -39,6 +39,7 @@
 
 import java.io.IOException;
 import java.util.Collection;
+import java.util.List;
 
 /**
  * An ObjectDatabase of another {@link Repository}.
@@ -124,4 +125,9 @@ void openObjectInAllPacks1(final Collection<PackedObjectLoader> out,
 	protected void closeAlternates(final ObjectDatabase[] alt) {
 		// Do nothing; these belong to odb to close, not us.
 	}
+
+	@Override
+	public List<PackFile> listLocalPacks() {
+		return odb.listLocalPacks();
+	}
 }
diff --git a/org.spearce.jgit/src/org/spearce/jgit/lib/ObjectDatabase.java b/org.spearce.jgit/src/org/spearce/jgit/lib/ObjectDatabase.java
index a547052..722c802 100644
--- a/org.spearce.jgit/src/org/spearce/jgit/lib/ObjectDatabase.java
+++ b/org.spearce.jgit/src/org/spearce/jgit/lib/ObjectDatabase.java
@@ -39,6 +39,7 @@
 
 import java.io.IOException;
 import java.util.Collection;
+import java.util.List;
 import java.util.concurrent.atomic.AtomicReference;
 
 /**
@@ -64,7 +65,15 @@
 	protected ObjectDatabase() {
 		alternates = new AtomicReference<ObjectDatabase[]>();
 	}
-
+	
+	/**
+	 * The list of Packs THIS repo contains
+	 * 
+	 * @return List<PackFile> of package names contained in this repo. 
+	 * 		   Should be an empty list if there are none.
+	 */
+	public abstract List<PackFile> listLocalPacks();
+	
 	/**
 	 * Does this database exist yet?
 	 *
diff --git a/org.spearce.jgit/src/org/spearce/jgit/lib/ObjectDirectory.java b/org.spearce.jgit/src/org/spearce/jgit/lib/ObjectDirectory.java
index 859824d..fe219c6 100644
--- a/org.spearce.jgit/src/org/spearce/jgit/lib/ObjectDirectory.java
+++ b/org.spearce.jgit/src/org/spearce/jgit/lib/ObjectDirectory.java
@@ -508,4 +508,9 @@ boolean tryAgain(final long currLastModified) {
 			return true;
 		}
 	}
+
+	@Override
+	public List<PackFile> listLocalPacks() {
+		return new ArrayList<PackFile>(Arrays.asList(packList.get().packs));
+	}
 }
-- 
1.6.4.2