Extract Exception -> HTTP status code mapping for reuse

Extract private static method UploadPackServlet#statusCodeForThrowable
to a public static method in the UploadPackErrorHandler interface so
that implementers of this interface can reuse the default mapping.

Change-Id: Ie4a0a006b0148d5b828d610c55d19ce407aab055

3 files changed, 36 insertions, 13 deletions

diff --git a/org.eclipse.jgit.http.server/.settings/.api_filters b/org.eclipse.jgit.http.server/.settings/.api_filters
new file mode 100644
index 0000000000..2c32c9864b
--- /dev/null
+++ b/org.eclipse.jgit.http.server/.settings/.api_filters
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<component id="org.eclipse.jgit.http.server" version="2">
+    <resource path="src/org/eclipse/jgit/http/server/UploadPackErrorHandler.java" type="org.eclipse.jgit.http.server.UploadPackErrorHandler">
+        <filter id="1210056707">
+            <message_arguments>
+                <message_argument value="6.1.1"/>
+                <message_argument value="statusCodeForThrowable(Throwable)"/>
+            </message_arguments>
+        </filter>
+    </resource>
+</component>
diff --git a/org.eclipse.jgit.http.server/src/org/eclipse/jgit/http/server/UploadPackErrorHandler.java b/org.eclipse.jgit.http.server/src/org/eclipse/jgit/http/server/UploadPackErrorHandler.java
index 03be0873b0..2aadbbc984 100644
--- a/org.eclipse.jgit.http.server/src/org/eclipse/jgit/http/server/UploadPackErrorHandler.java
+++ b/org.eclipse.jgit.http.server/src/org/eclipse/jgit/http/server/UploadPackErrorHandler.java
@@ -9,13 +9,19 @@
  */
 package org.eclipse.jgit.http.server;
 
+import static javax.servlet.http.HttpServletResponse.SC_FORBIDDEN;
+import static javax.servlet.http.HttpServletResponse.SC_INTERNAL_SERVER_ERROR;
+import static javax.servlet.http.HttpServletResponse.SC_OK;
+
 import java.io.IOException;
 
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
+import org.eclipse.jgit.errors.PackProtocolException;
 import org.eclipse.jgit.transport.ServiceMayNotContinueException;
 import org.eclipse.jgit.transport.UploadPack;
+import org.eclipse.jgit.transport.resolver.ServiceNotEnabledException;
 
 /**
  * Handle git-upload-pack errors.
@@ -35,6 +41,24 @@ import org.eclipse.jgit.transport.UploadPack;
  */
 public interface UploadPackErrorHandler {
 	/**
+	 * Maps a thrown git related Exception to an appropriate HTTP status code.
+	 *
+	 * @param error
+	 *            The thrown Exception.
+	 * @return the HTTP status code as an int
+	 * @since 6.1.1
+	 */
+	public static int statusCodeForThrowable(Throwable error) {
+		if (error instanceof ServiceNotEnabledException) {
+			return SC_FORBIDDEN;
+		}
+		if (error instanceof PackProtocolException) {
+			// Internal git errors are not errors from an HTTP standpoint.
+			return SC_OK;
+		}
+		return SC_INTERNAL_SERVER_ERROR;
+	}
+	/**
 	 * @param req
 	 *            The HTTP request
 	 * @param rsp
diff --git a/org.eclipse.jgit.http.server/src/org/eclipse/jgit/http/server/UploadPackServlet.java b/org.eclipse.jgit.http.server/src/org/eclipse/jgit/http/server/UploadPackServlet.java
index 509ea4cf55..b0a07f1d5d 100644
--- a/org.eclipse.jgit.http.server/src/org/eclipse/jgit/http/server/UploadPackServlet.java
+++ b/org.eclipse.jgit.http.server/src/org/eclipse/jgit/http/server/UploadPackServlet.java
@@ -11,8 +11,6 @@
 package org.eclipse.jgit.http.server;
 
 import static javax.servlet.http.HttpServletResponse.SC_FORBIDDEN;
-import static javax.servlet.http.HttpServletResponse.SC_INTERNAL_SERVER_ERROR;
-import static javax.servlet.http.HttpServletResponse.SC_OK;
 import static javax.servlet.http.HttpServletResponse.SC_UNAUTHORIZED;
 import static javax.servlet.http.HttpServletResponse.SC_UNSUPPORTED_MEDIA_TYPE;
 import static org.eclipse.jgit.http.server.GitSmartHttpTools.UPLOAD_PACK;
@@ -23,6 +21,7 @@ import static org.eclipse.jgit.http.server.ServletUtils.ATTRIBUTE_HANDLER;
 import static org.eclipse.jgit.http.server.ServletUtils.consumeRequestBody;
 import static org.eclipse.jgit.http.server.ServletUtils.getInputStream;
 import static org.eclipse.jgit.http.server.ServletUtils.getRepository;
+import static org.eclipse.jgit.http.server.UploadPackErrorHandler.statusCodeForThrowable;
 import static org.eclipse.jgit.util.HttpSupport.HDR_USER_AGENT;
 
 import java.io.IOException;
@@ -152,17 +151,6 @@ class UploadPackServlet extends HttpServlet {
 		}
 	}
 
-	private static int statusCodeForThrowable(Throwable error) {
-		if (error instanceof ServiceNotEnabledException) {
-			return SC_FORBIDDEN;
-		}
-		if (error instanceof PackProtocolException) {
-			// Internal git errors is not an error from an HTTP standpoint.
-			return SC_OK;
-		}
-		return SC_INTERNAL_SERVER_ERROR;
-	}
-
 	private final UploadPackErrorHandler handler;
 
 	UploadPackServlet(@Nullable UploadPackErrorHandler handler) {