org.apache.camel.resume.Serializable Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.camel.resume;
import java.io.File;
import java.nio.ByteBuffer;
import org.apache.camel.util.ObjectHelper;
/**
* An interface that represents resumable objects that can be serialized to a medium
*/
@FunctionalInterface
public interface Serializable {
int TYPE_INTEGER = 0;
int TYPE_LONG = 1;
int TYPE_STRING = 2;
int TYPE_FILE = 3;
int BYTES = 1024;
/**
* Serializes this offset into a buffer of bytes
*
* @param obj the object to serialize
* @return a ByteBuffer instance with the serialized contents of this object
*/
default ByteBuffer serialize(Object obj) {
ObjectHelper.notNull(obj, "Cannot perform serialization on a null object");
if (obj instanceof Long) {
ByteBuffer buffer = ByteBuffer.allocate(Integer.BYTES + Long.BYTES);
buffer.putInt(TYPE_LONG);
long data = ((Long) obj).longValue();
buffer.putLong(data);
return buffer;
}
if (obj instanceof String) {
byte[] data = ((String) obj).getBytes();
ByteBuffer buffer = ByteBuffer.allocate(Integer.BYTES + data.length);
buffer.putInt(TYPE_STRING);
buffer.put(data);
return buffer;
}
if (obj instanceof File) {
byte[] data = ((File) obj).getPath().getBytes();
ByteBuffer buffer = ByteBuffer.allocate(Integer.BYTES + data.length);
buffer.putInt(TYPE_FILE);
buffer.put(data);
return buffer;
}
return null;
}
/**
* Serializes this offset into a buffer of bytes
*
* @return a ByteBuffer instance with the serialized contents of this object
*/
ByteBuffer serialize();
}