Add isSuccessful to MergeStatus, RebaseResult.Status and PullResult

This is useful when the result needs to be displayed and it's only of
interest if the operation was successful or not (in egit, it could be
used in MultiPullResultDialog).

Change-Id: Icfc9a9c76763f8a777087a1262c8d6ad251a9068
Signed-off-by: Robin Stocker <robin@nibor.org>
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

org.eclipse.jgit/src/org/eclipse/jgit/api/MergeResult.java

@@ -70,37 +70,72 @@ public class MergeResult {
 			public String toString() {
 				return "Fast-forward";
 			}
+
+			@Override
+			public boolean isSuccessful() {
+				return true;
+			}
 		},
 		/** */
 		ALREADY_UP_TO_DATE {
 			public String toString() {
 				return "Already-up-to-date";
 			}
+
+			@Override
+			public boolean isSuccessful() {
+				return true;
+			}
 		},
 		/** */
 		FAILED {
 			public String toString() {
 				return "Failed";
 			}
+
+			@Override
+			public boolean isSuccessful() {
+				return false;
+			}
 		},
 		/** */
 		MERGED {
 			public String toString() {
 				return "Merged";
 			}
+
+			@Override
+			public boolean isSuccessful() {
+				return true;
+			}
 		},
 		/** */
 		CONFLICTING {
 			public String toString() {
 				return "Conflicting";
 			}
+
+			@Override
+			public boolean isSuccessful() {
+				return false;
+			}
 		},
 		/** */
 		NOT_SUPPORTED {
 			public String toString() {
 				return "Not-yet-supported";
 			}
+
+			@Override
+			public boolean isSuccessful() {
+				return false;
 			}
+		};
+
+		/**
+		 * @return whether the status indicates a successful result
+		 */
+		public abstract boolean isSuccessful();
 	}
 
 	private ObjectId[] mergedCommits;

org.eclipse.jgit/src/org/eclipse/jgit/api/PullResult.java

@@ -101,6 +101,17 @@ public class PullResult {
 		return this.fetchedFrom;
 	}
 
+	/**
+	 * @return whether the pull was successful
+	 */
+	public boolean isSuccessful() {
+		if (mergeResult != null)
+			return mergeResult.getMergeStatus().isSuccessful();
+		else if (rebaseResult != null)
+			return rebaseResult.getStatus().isSuccessful();
+		return true;
+	}
+
 	@Override
 	public String toString() {
 		StringBuilder sb = new StringBuilder();

org.eclipse.jgit/src/org/eclipse/jgit/api/RebaseResult.java

@@ -59,27 +59,62 @@ public class RebaseResult {
 		/**
 		 * Rebase was successful, HEAD points to the new commit
 		 */
-		OK,
+		OK {
+			@Override
+			public boolean isSuccessful() {
+				return true;
+			}
+		},
 		/**
 		 * Aborted; the original HEAD was restored
 		 */
-		ABORTED,
+		ABORTED {
+			@Override
+			public boolean isSuccessful() {
+				return false;
+			}
+		},
 		/**
 		 * Stopped due to a conflict; must either abort or resolve or skip
 		 */
-		STOPPED,
+		STOPPED {
+			@Override
+			public boolean isSuccessful() {
+				return false;
+			}
+		},
 		/**
 		 * Failed; the original HEAD was restored
 		 */
-		FAILED,
+		FAILED {
+			@Override
+			public boolean isSuccessful() {
+				return false;
+			}
+		},
 		/**
 		 * Already up-to-date
 		 */
-		UP_TO_DATE,
+		UP_TO_DATE {
+			@Override
+			public boolean isSuccessful() {
+				return true;
+			}
+		},
 		/**
 		 * Fast-forward, HEAD points to the new commit
 		 */
-		FAST_FORWARD;
+		FAST_FORWARD {
+			@Override
+			public boolean isSuccessful() {
+				return true;
+			}
+		};
+
+		/**
+		 * @return whether the status indicates a successful result
+		 */
+		public abstract boolean isSuccessful();
 	}
 
 	static final RebaseResult OK_RESULT = new RebaseResult(Status.OK);