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RocksDB fat jar that contains .so files for linux32 and linux64 (glibc and musl-libc), jnilib files for Mac OSX, and a .dll for Windows x64.

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// Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
// Copyright (c) 2014, Vlad Balan ([email protected]).  All rights reserved.
//  This source code is licensed under both the GPLv2 (found in the
//  COPYING file in the root directory) and Apache 2.0 License
//  (found in the LICENSE.Apache file in the root directory).

package org.rocksdb;

/**
 * StringAppendOperator is a merge operator that concatenates
 * two strings.
 */
public class StringAppendOperator extends MergeOperator {
    public StringAppendOperator() {
        this(',');
    }

    public StringAppendOperator(char delim) {
        super(newSharedStringAppendOperator(delim));
    }

    private native static long newSharedStringAppendOperator(final char delim);
    @Override protected final native void disposeInternal(final long handle);
}