From 4cc7b1c5b0e383ae3d65798e35f759441417fed8 Mon Sep 17 00:00:00 2001
From: "Shawn O. Pearce" <spearce@spearce.org>
Date: Fri, 16 Apr 2010 08:41:59 -0700
Subject: [PATCH] ObjectIdSubclassMap: Add isEmpty() method

This class behaves like a cross between a Set and a Map, sometimes
we might expect to use the method isEmpty() to test for size() == 0.
So implement it, reducing the surprise folks get when they are given
one of these objects.

Change-Id: I0d68e1243da8e62edf79c6ba4fd925f643e80a88
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
---
 .../src/org/eclipse/jgit/lib/ObjectIdSubclassMap.java        | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/lib/ObjectIdSubclassMap.java b/org.eclipse.jgit/src/org/eclipse/jgit/lib/ObjectIdSubclassMap.java
index a0b6d0ed2..aa4bf99f3 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/lib/ObjectIdSubclassMap.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/lib/ObjectIdSubclassMap.java
@@ -135,6 +135,11 @@ public class ObjectIdSubclassMap<V extends ObjectId> implements Iterable<V> {
 		return size;
 	}
 
+	/** @return true if {@link #size()} is 0. */
+	public boolean isEmpty() {
+		return size == 0;
+	}
+
 	public Iterator<V> iterator() {
 		return new Iterator<V>() {
 			private int found;