Squashed 'src/rocksdb/' content from commit 78b8a7d

git-subtree-dir: src/rocksdb
git-subtree-split: 78b8a7d908d7e67cc6664398e39560b76c965773

java/org/rocksdb/MemTableConfig.java

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+// Copyright (c) 2014, Facebook, Inc.  All rights reserved.
+// This source code is licensed under the BSD-style license found in the
+// LICENSE file in the root directory of this source tree. An additional grant
+// of patent rights can be found in the PATENTS file in the same directory.
+package org.rocksdb;
+
+/**
+ * MemTableConfig is used to config the internal mem-table of a RocksDB.
+ * It is required for each memtable to have one such sub-class to allow
+ * Java developers to use it.
+ *
+ * To make a RocksDB to use a specific MemTable format, its associated
+ * MemTableConfig should be properly set and passed into Options
+ * via Options.setMemTableFactory() and open the db using that Options.
+ *
+ * @see Options
+ */
+public abstract class MemTableConfig {
+  /**
+   * This function should only be called by Options.setMemTableConfig(),
+   * which will create a c++ shared-pointer to the c++ MemTableRepFactory
+   * that associated with the Java MemTableConfig.
+   *
+   * @see Options.setMemTableFactory()
+   */
+  abstract protected long newMemTableFactoryHandle();
+}