From 9895338de1c92d09fe82ec927e5ffd2da0973084 Mon Sep 17 00:00:00 2001
From: Jonathan Nieder <jrn@google.com>
Date: Wed, 11 Nov 2015 14:51:02 -0800
Subject: RefDatabase: Remove fallback exactRef implementation

This is simpler to implement than getRef.  Make it abstract so
implementers remember to override it.

Change-Id: I5f319be1fb1206d7a0142ea939dc4e1039f850ab
Signed-off-by: Jonathan Nieder <jrn@google.com>
---
 .../tst/org/eclipse/jgit/lib/RefDatabaseConflictingNamesTest.java | 5 +++++
 org.eclipse.jgit/.settings/.api_filters                           | 8 ++++++++
 org.eclipse.jgit/src/org/eclipse/jgit/lib/RefDatabase.java        | 8 +-------
 3 files changed, 14 insertions(+), 7 deletions(-)

diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/lib/RefDatabaseConflictingNamesTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/lib/RefDatabaseConflictingNamesTest.java
index 1c21194248..3798858414 100644
--- a/org.eclipse.jgit.test/tst/org/eclipse/jgit/lib/RefDatabaseConflictingNamesTest.java
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/lib/RefDatabaseConflictingNamesTest.java
@@ -94,6 +94,11 @@ public class RefDatabaseConflictingNamesTest {
 			return false;
 		}
 
+		@Override
+		public Ref exactRef(String name) throws IOException {
+			return null;
+		}
+
 		@Override
 		public Ref getRef(String name) throws IOException {
 			return null;
diff --git a/org.eclipse.jgit/.settings/.api_filters b/org.eclipse.jgit/.settings/.api_filters
index 79183a6cdd..1e18de6647 100644
--- a/org.eclipse.jgit/.settings/.api_filters
+++ b/org.eclipse.jgit/.settings/.api_filters
@@ -38,6 +38,14 @@
             </message_arguments>
         </filter>
     </resource>
+    <resource path="src/org/eclipse/jgit/lib/RefDatabase.java" type="org.eclipse.jgit.lib.RefDatabase">
+        <filter comment="class is extended by extenders but not clients of the API" id="421650549">
+            <message_arguments>
+                <message_argument value="org.eclipse.jgit.lib.RefDatabase"/>
+                <message_argument value="exactRef(String)"/>
+            </message_arguments>
+        </filter>
+    </resource>
     <resource path="src/org/eclipse/jgit/revwalk/DepthWalk.java" type="org.eclipse.jgit.revwalk.DepthWalk">
         <filter id="403804204">
             <message_arguments>
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/lib/RefDatabase.java b/org.eclipse.jgit/src/org/eclipse/jgit/lib/RefDatabase.java
index 5010a89ed5..73c7b1c613 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/lib/RefDatabase.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/lib/RefDatabase.java
@@ -290,13 +290,7 @@ public abstract class RefDatabase {
 	 * @since 4.1
 	 */
 	@Nullable
-	public Ref exactRef(String name) throws IOException {
-		Ref ref = getRef(name);
-		if (ref == null || !name.equals(ref.getName())) {
-			return null;
-		}
-		return ref;
-	}
+	public abstract Ref exactRef(String name) throws IOException;
 
 	/**
 	 * Read the specified references.
-- 
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