org.jsimpledb.kv.simple.Put Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of jsimpledb-kv-simple Show documentation

A couple of simplistic JSimpleDB key/value store implementations.

There is a newer version: 3.6.1


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

package org.jsimpledb.kv.simple;

import com.google.common.base.Preconditions;

import org.jsimpledb.kv.KVStore;
import org.jsimpledb.kv.util.KeyWatchTracker;

/**
 * Represents the addition or changing of a key/value pair in a {@link SimpleKVTransaction}.
 *
 * 
 * Note the definition of {@linkplain #equals equality} does not include the {@linkplain #getValue value}.
 */
class Put extends Mutation {

    private final byte[] value;

    Put(byte[] key, byte[] value) {
        super(key);
        Preconditions.checkArgument(value != null, "null value");
        this.value = value.clone();
    }

    public byte[] getKey() {
        return this.getMin();
    }

    public byte[] getValue() {
        return this.value.clone();
    }

    @Override
    public void apply(KVStore kv) {
        kv.put(this.getKey(), this.getValue());
    }

    @Override
    public boolean trigger(KeyWatchTracker keyWatchTracker) {
        return keyWatchTracker.trigger(this.getKey());
    }
}