svn commit: r421829 [2/2] - in /lucene/hadoop/trunk: ./ src/contrib/streaming/src/java/org/apache/hadoop/streaming/ src/contrib/streaming/src/test/org/apache/hadoop/streaming/

[cu...@apache.org]

Added: lucene/hadoop/trunk/src/contrib/streaming/src/test/org/apache/hadoop/streaming/UniqApp.java
URL: http://svn.apache.org/viewvc/lucene/hadoop/trunk/src/contrib/streaming/src/test/org/apache/hadoop/streaming/UniqApp.java?rev=421829&view=auto
==============================================================================
--- lucene/hadoop/trunk/src/contrib/streaming/src/test/org/apache/hadoop/streaming/UniqApp.java (added)
+++ lucene/hadoop/trunk/src/contrib/streaming/src/test/org/apache/hadoop/streaming/UniqApp.java Fri Jul 14 00:55:15 2006
@@ -0,0 +1,54 @@
+/**
+ * Copyright 2006 The Apache Software Foundation
+ *
+ * Licensed 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.hadoop.streaming;
+
+import java.io.*;
+
+/** A minimal Java implementation of /usr/bin/uniq
+    Used to test the usage of external applications without adding
+    platform-specific dependencies.
+    Uniques lines and prepends a header on the line.
+*/
+public class UniqApp
+{
+
+  public UniqApp(String header)
+  {
+    this.header = header;
+  }
+  public void go() throws IOException
+  {
+    BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
+    String line;
+    String prevLine = null;
+    while ((line = in.readLine()) != null) {
+        if(! line.equals(prevLine)) {
+          System.out.println(header + line);
+        }
+        prevLine = line;
+    }
+  }
+
+  public static void main(String[] args) throws IOException
+  {
+    String h = (args.length < 1) ? "" : args[0];
+    UniqApp app = new UniqApp(h);
+    app.go();
+  }
+
+  String header;
+}