/*
* Copyright (c) [2016] [ <ether.camp> ]
* This file is part of the ethereumJ library.
*
* The ethereumJ library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* The ethereumJ library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the ethereumJ library. If not, see <http://www.gnu.org/licenses/>.
*/
package org.ethereum.datasource;
/**
* Just a convenient class to store arbitrary Objects into byte[] value backing
* Source.
* Includes ReadCache for caching deserialized objects and object Serializer
*
* Created by Anton Nashatyrev on 06.12.2016.
*/
public class ObjectDataSource<V> extends SourceChainBox<byte[], V, byte[], byte[]> {
ReadCache<byte[], V> cache;
SourceCodec<byte[], V, byte[], byte[]> codec;
Source<byte[], byte[]> byteSource;
/**
* Creates new instance
* @param byteSource baking store
* @param serializer for encode/decode byte[] <=> V
* @param readCacheEntries number of entries to cache
*/
public ObjectDataSource(Source<byte[], byte[]> byteSource, Serializer<V, byte[]> serializer, int readCacheEntries) {
super(byteSource);
this.byteSource = byteSource;
add(codec = new SourceCodec<>(byteSource, new Serializers.Identity<byte[]>(), serializer));
if (readCacheEntries > 0) {
add(cache = new ReadCache.BytesKey<>(codec).withMaxCapacity(readCacheEntries));
}
}
}