HADOOP-1283. Add a file I missed in the first commit.

git-svn-id: https://svn.apache.org/repos/asf/lucene/hadoop/trunk@549577 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/hadoop/dfs/StringBytesWritable.java

@@ -0,0 +1,56 @@
+/**
+ * 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.hadoop.dfs;
+
+import java.io.IOException;
+import org.apache.hadoop.io.BytesWritable;
+import org.apache.hadoop.io.WritableComparator;
+
+class StringBytesWritable extends BytesWritable {
+
+  StringBytesWritable() {
+    super();
+  }
+
+  /*StringBytesWritable(byte[] bytes) {
+    super(bytes);
+  }*/
+
+  /**
+   * Create a BytesWritable by extracting bytes from the input string.
+   */
+  StringBytesWritable(String str) throws IOException {
+    super(str.getBytes("UTF8"));
+  }
+
+  /**
+   * Convert BytesWritable to a String.
+   */
+  String getString() throws IOException {
+    return new String(get(),"UTF8");
+  }
+
+  /**
+   * Compare to a String.
+   */
+  boolean equals(String str) throws IOException {
+    return WritableComparator.compareBytes(get(), 0, getSize(), 
+                                   str.getBytes("UTF8"), 0, str.length()) == 0;
+  }
+}