1 files changed, 37 insertions, 0 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/filters/UniqFilter.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/filters/UniqFilter.java
new file mode 100644
index 00000000..e72d5f58
--- /dev/null
+++ b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/filters/UniqFilter.java
@@ -0,0 +1,37 @@
+/*
+ *  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 org.apache.tools.ant.filters;
+
+/**
+ * Like the Unix uniq(1) command, only returns tokens that are
+ * different from their ancestor token.
+ *
+ * <p>This filter is probably most useful if used together with a
+ * sortfilter.</p>
+ *
+ * @since Ant 1.8.0
+ */
+public class UniqFilter extends TokenFilter.ChainableReaderFilter {
+
+    private String lastLine = null;
+
+    public String filter(String string) {
+        return lastLine == null || !lastLine.equals(string)
+            ? (lastLine = string) : null;
+    }
+}