--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java/org/apache/cassandra/db/Row.java	Fri Apr 02 13:36:02 2010 +0900
@@ -0,0 +1,75 @@
+/**
+ * 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.cassandra.db;
+
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.util.Collection;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+
+import org.apache.log4j.Logger;
+
+import org.apache.cassandra.io.ICompactSerializer;
+
+public class Row
+{
+    private static Logger logger_ = Logger.getLogger(Row.class);
+    private static RowSerializer serializer = new RowSerializer();
+
+    static RowSerializer serializer()
+    {
+        return serializer;
+    }
+
+    public final String key;
+    public final ColumnFamily cf;
+
+    public Row(String key, ColumnFamily cf)
+    {
+        assert key != null;
+        // cf may be null, indicating no data
+        this.key = key;
+        this.cf = cf;
+    }
+
+    @Override
+    public String toString()
+    {
+        return "Row(" +
+               "key='" + key + '\'' +
+               ", cf=" + cf +
+               ')';
+    }
+}
+
+class RowSerializer implements ICompactSerializer<Row>
+{
+    public void serialize(Row row, DataOutputStream dos) throws IOException
+    {
+        dos.writeUTF(row.key);
+        ColumnFamily.serializer().serialize(row.cf, dos);
+    }
+
+    public Row deserialize(DataInputStream dis) throws IOException
+    {
+        return new Row(dis.readUTF(), ColumnFamily.serializer().deserialize(dis));
+    }
+}