// Copyright (C) 2024 The Johns Hopkins University Applied Physics Laboratory LLC
//
// 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 dsstore.ext;

import java.nio.ByteBuffer;

public abstract class ExtInfo
{
	int type;
	int size;
	
	public ExtInfo(int aType, int aSize)
	{
		type = aType;
		size = aSize;
	}
	
	public int getSize()
	{
		if (size%2 == 0)
			return size;
		
		return size + 1;
	}
	
	public void writeHeader(ByteBuffer aBuf)
	{
		aBuf.putShort((short)(type & 0xFFFF));
		aBuf.putShort((short)(size & 0xFFFF));
	}
	
	public abstract void readPayload(ByteBuffer aBuf);
	
	public abstract void writePayload(ByteBuffer aBuf);
	
}
