io.journalkeeper.journalstore.LongSerializer Maven / Gradle / Ivy
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/**
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.journalkeeper.journalstore;
import io.journalkeeper.base.Serializer;
import java.nio.ByteBuffer;
/**
* @author LiYue
* Date: 2019-08-12
*/
public class LongSerializer implements Serializer {
@Override
public byte[] serialize(Long entry) {
byte[] bytes = new byte[Long.BYTES];
if (null == entry) {
entry = -1L;
}
ByteBuffer buffer = ByteBuffer.wrap(bytes);
buffer.putLong(entry);
return bytes;
}
@Override
public Long parse(byte[] bytes) {
if (null == bytes || bytes.length < Long.BYTES) {
return null;
}
ByteBuffer buffer = ByteBuffer.wrap(bytes);
Long value = buffer.getLong();
if (value < 0) value = null;
return value;
}
}