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/*
 * Copyright The WildFly Authors
 * SPDX-License-Identifier: Apache-2.0
 */

package org.wildfly.clustering.marshalling.protostream;

import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.OptionalInt;

import org.infinispan.protostream.descriptors.WireType;
import org.wildfly.clustering.marshalling.ByteBufferMarshalledValue;

/**
 * {@link ProtoStreamMarshaller} for a {@link ByteBufferMarshalledValue}.
 * @author Paul Ferraro
 */
public enum ByteBufferMarshalledValueMarshaller implements ProtoStreamMarshaller> {
	INSTANCE;

	private static final int BUFFER_INDEX = 1;

	@Override
	public ByteBufferMarshalledValue readFrom(ProtoStreamReader reader) throws IOException {
		ByteBuffer buffer = null;
		while (!reader.isAtEnd()) {
			int tag = reader.readTag();
			switch (WireType.getTagFieldNumber(tag)) {
				case BUFFER_INDEX:
					buffer = reader.readByteBuffer();
					break;
				default:
					reader.skipField(tag);
			}
		}
		return new ByteBufferMarshalledValue<>(buffer);
	}

	@Override
	public void writeTo(ProtoStreamWriter writer, ByteBufferMarshalledValue key) throws IOException {
		ByteBuffer buffer = key.getBuffer();
		if (buffer != null) {
			writer.writeBytes(BUFFER_INDEX, buffer);
		}
	}

	@Override
	public OptionalInt size(ProtoStreamSizeOperation operation, ByteBufferMarshalledValue value) {
		if (value.isEmpty()) return OptionalInt.of(0);
		OptionalInt size = value.size();
		return size.isPresent() ? OptionalInt.of(operation.tagSize(BUFFER_INDEX, WireType.LENGTH_DELIMITED) + operation.varIntSize(size.getAsInt()) + size.getAsInt()) : OptionalInt.empty();
	}

	@SuppressWarnings("unchecked")
	@Override
	public Class> getJavaClass() {
		return (Class>) (Class) ByteBufferMarshalledValue.class;
	}
}
    

    

    

            

    

            



    
    






    
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