1 files changed, 39 insertions, 0 deletions
diff --git a/src/main/java/com/gitblit/wicket/UrlExternalFormComparator.java b/src/main/java/com/gitblit/wicket/UrlExternalFormComparator.java
new file mode 100644
index 00000000..90f4b320
--- /dev/null
+++ b/src/main/java/com/gitblit/wicket/UrlExternalFormComparator.java
@@ -0,0 +1,39 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.gitblit.wicket;
+
+import java.net.URL;
+import java.util.Comparator;
+
+/**
+ * A comparator of URL instances.
+ *
+ * Comparing URLs with their implementation of #equals() is
+ * bad because it may cause problems like DNS resolving, or other
+ * slow checks. This comparator uses the external form of an URL
+ * to make a simple comparison of two Strings.
+ *
+ * @since 1.5.6
+ */
+public class UrlExternalFormComparator implements Comparator<URL>
+{
+	@Override
+	public int compare(URL url1, URL url2)
+	{
+		return url1.toExternalForm().compareTo(url2.toExternalForm());
+	}
+}
+\ No newline at end of file