io.permazen.kv.lmdb.ByteArrayLMDBKVStore Maven / Gradle / Ivy

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Permazen key/value store implementation based on LMDB.

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/*
 * Copyright (C) 2015 Archie L. Cobbs. All rights reserved.
 */

package io.permazen.kv.lmdb;

import io.permazen.kv.KVStore;

import org.lmdbjava.Dbi;
import org.lmdbjava.Txn;

/**
 * {@link KVStore} view of a LMDB transaction using {@code byte[]} array buffers.
 *
 * 
 * Instances must be {@link #close}'d when no longer needed to avoid leaking resources.
 */
public class ByteArrayLMDBKVStore extends LMDBKVStore {

// Constructors

    /**
     * Constructor.
     *
     * 
     * Closing this instance does not close the underlying transaction.
     *
     * @param db LMDB database
     * @param tx LMDB transaction
     * @throws IllegalArgumentException if {@code db} or {@code tx} is null
     */
    public ByteArrayLMDBKVStore(Dbi db, Txn tx) {
        super(db, tx);
    }

    @Override
    protected byte[] wrap(byte[] data, boolean copy) {
        return data == null ? null : copy ? data.clone() : data;
    }

    @Override
    protected byte[] unwrap(byte[] data, boolean copy) {
        return data == null ? null : copy ? data.clone() : data;
    }
}