Initial commit for ScanFilter.

This closes #51.

Signed-off-by: Benoit Sigoure <tsunanet@gmail.com>

Makefile

@@ -69,6 +69,7 @@ asynchbase_SOURCES := \
 	src/RemoteException.java	\
 	src/RowLock.java	\
 	src/RowLockRequest.java	\
+	src/ScanFilter.java	\
 	src/Scanner.java	\
 	src/SingletonList.java	\
 	src/TableNotFoundException.java	\

src/ScanFilter.java

@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2013  The Async HBase Authors.  All rights reserved.
+ * This file is part of Async HBase.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *   - Redistributions of source code must retain the above copyright notice,
+ *     this list of conditions and the following disclaimer.
+ *   - Redistributions in binary form must reproduce the above copyright notice,
+ *     this list of conditions and the following disclaimer in the documentation
+ *     and/or other materials provided with the distribution.
+ *   - Neither the name of the StumbleUpon nor the names of its contributors
+ *     may be used to endorse or promote products derived from this software
+ *     without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+package org.hbase.async;
+
+import org.jboss.netty.buffer.ChannelBuffer;
+
+/**
+ * @since 1.5
+ */
+public abstract class ScanFilter {
+
+  /**
+   * Serializes the byte representation to the RPC channel buffer.
+   * @param buf The RPC channel buffer to which the byte array is serialized
+   * @since 1.5
+   */
+  abstract void serialize(ChannelBuffer buf);
+
+  /**
+   * returns the number of bytes that it will write to the RPC channel buffer when {@code serialize}
+   * is called. This method helps predict the initial size of the byte array
+   * @return A strictly positive integer
+   * @since 1.5
+   */
+  abstract int predictSerializedSize();
+
+}