Move BaseReceivePack#pushCert getter and setter to ReceivePack

This is a first step toward eliminating the BaseReceivePack API.

Inspired by a larger change by Dan Wang <dwwang@google.com>.

Change-Id: I5c876a67d8db24bf808823d9ea44d991b1ce5277
Signed-off-by: Jonathan Nieder <jrn@google.com>
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

org.eclipse.jgit/.settings/.api_filters

@@ -30,6 +30,20 @@
             </message_arguments>
         </filter>
     </resource>
+    <resource path="src/org/eclipse/jgit/transport/BaseReceivePack.java" type="org.eclipse.jgit.transport.BaseReceivePack">
+        <filter id="421650549">
+            <message_arguments>
+                <message_argument value="org.eclipse.jgit.transport.BaseReceivePack"/>
+                <message_argument value="getPushCertificate()"/>
+            </message_arguments>
+        </filter>
+        <filter id="421650549">
+            <message_arguments>
+                <message_argument value="org.eclipse.jgit.transport.BaseReceivePack"/>
+                <message_argument value="setPushCertificate(PushCertificate)"/>
+            </message_arguments>
+        </filter>
+    </resource>
     <resource path="src/org/eclipse/jgit/transport/TransferConfig.java" type="org.eclipse.jgit.transport.TransferConfig">
         <filter id="1159725059">
             <message_arguments>

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

@@ -275,7 +275,7 @@ public abstract class BaseReceivePack {
 
 	private PushCertificateParser pushCertificateParser;
 	private SignedPushConfig signedPushConfig;
-	private PushCertificate pushCert;
+	PushCertificate pushCert;
 	private ReceivedPackStatistics stats;
 
 	/**
@@ -286,10 +286,10 @@ public abstract class BaseReceivePack {
 	 * @return the parsed certificate, or null if push certificates are disabled
 	 *         or no cert was presented by the client.
 	 * @since 4.1
+	 * @deprecated use {@link ReceivePack#getPushCertificate}.
 	 */
-	public PushCertificate getPushCertificate() {
-		return pushCert;
-	}
+	@Deprecated
+	public abstract PushCertificate getPushCertificate();
 
 	/**
 	 * Set the push certificate used to verify the pusher's identity.
@@ -300,10 +300,10 @@ public abstract class BaseReceivePack {
 	 * @param cert
 	 *            the push certificate to set.
 	 * @since 4.1
+	 * @deprecated use {@link ReceivePack#setPushCertificate(PushCertificate)}.
 	 */
-	public void setPushCertificate(PushCertificate cert) {
-		pushCert = cert;
-	}
+	@Deprecated
+	public abstract void setPushCertificate(PushCertificate cert);
 
 	/**
 	 * Create a new pack receive for an open repository.

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

@@ -92,6 +92,35 @@ public class ReceivePack extends BaseReceivePack {
 		postReceive = PostReceiveHook.NULL;
 	}
 
+	/**
+	 * Get the push certificate used to verify the pusher's identity.
+	 * <p>
+	 * Only valid after commands are read from the wire.
+	 *
+	 * @return the parsed certificate, or null if push certificates are disabled
+	 *         or no cert was presented by the client.
+	 * @since 4.1
+	 */
+	@Override
+	public PushCertificate getPushCertificate() {
+		return pushCert;
+	}
+
+	/**
+	 * Set the push certificate used to verify the pusher's identity.
+	 * <p>
+	 * Should only be called if reconstructing an instance without going through
+	 * the normal {@link #recvCommands()} flow.
+	 *
+	 * @param cert
+	 *            the push certificate to set.
+	 * @since 4.1
+	 */
+	@Override
+	public void setPushCertificate(PushCertificate cert) {
+		pushCert = cert;
+	}
+
 	/**
 	 * Gets an unmodifiable view of the option strings associated with the push.
 	 *