/*
 * 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.directmemory.lightning.base;

import java.io.IOException;

import org.apache.directmemory.lightning.Marshaller;
import org.apache.directmemory.lightning.SerializationContext;
import org.apache.directmemory.lightning.Source;
import org.apache.directmemory.lightning.Target;
import org.apache.directmemory.lightning.metadata.PropertyDescriptor;

public abstract class AbstractMarshaller
    implements Marshaller
{

    @Override
    public <V> V unmarshall( PropertyDescriptor propertyDescriptor, Source source,
                             SerializationContext serializationContext )
        throws IOException
    {
        return null;
    }

    protected boolean writePossibleNull( Object value, Target target )
        throws IOException
    {
        target.writeByte( (byte) ( value == null ? 1 : 0 ) );
        return value != null;
    }

    protected boolean isNull( Source source )
        throws IOException
    {
        byte isNull = source.readByte();
        return isNull == 1 ? true : false;
    }
}