/*
 * Copyright (c) 2013 Pantheon Technologies s.r.o. and others.  All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 */
package org.opendaylight.openflowjava.protocol.impl.deserialization.match;

import io.netty.buffer.ByteBuf;

import org.opendaylight.openflowjava.protocol.api.extensibility.OFDeserializer;
import org.opendaylight.openflowjava.protocol.api.util.EncodeConstants;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.augments.rev131002.MetadataMatchEntry;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.augments.rev131002.MetadataMatchEntryBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.oxm.fields.grouping.MatchEntries;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.oxm.fields.grouping.MatchEntriesBuilder;

/**
 * @author michal.polkorab
 *
 */
public abstract class AbstractOxmMetadataDeserializer extends AbstractOxmMatchEntryDeserializer
        implements OFDeserializer<MatchEntries> {

    @Override
    public MatchEntries deserialize(ByteBuf input) {
        MatchEntriesBuilder builder = processHeader(getOxmClass(), getOxmField(), input);
        addMetadataAugmentation(builder, input);
        if (builder.isHasMask()) {
            OxmMaskDeserializer.addMaskAugmentation(builder, input, EncodeConstants.SIZE_OF_LONG_IN_BYTES);
        }
        return builder.build();
    }

    private static void addMetadataAugmentation(MatchEntriesBuilder builder, ByteBuf input) {
        MetadataMatchEntryBuilder metadata = new MetadataMatchEntryBuilder();
        byte[] metadataBytes = new byte[EncodeConstants.SIZE_OF_LONG_IN_BYTES];
        input.readBytes(metadataBytes);
        metadata.setMetadata(metadataBytes);
        builder.addAugmentation(MetadataMatchEntry.class, metadata.build());
    }
}