/*
 * Copyright (c) 2013 Cisco Systems, Inc. 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.protocol.bgp.parser.impl.message.update;

import com.google.common.base.Preconditions;
import com.google.common.collect.Lists;

import io.netty.buffer.ByteBuf;

import java.util.List;

import org.opendaylight.protocol.bgp.parser.BGPDocumentedException;
import org.opendaylight.protocol.bgp.parser.spi.AttributeParser;
import org.opendaylight.protocol.util.ReferenceCache;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.path.attributes.Communities;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.update.PathAttributesBuilder;

public final class CommunitiesAttributeParser implements AttributeParser {
    public static final int TYPE = 8;

    private final ReferenceCache refCache;

    public CommunitiesAttributeParser(final ReferenceCache refCache) {
        this.refCache = Preconditions.checkNotNull(refCache);
    }

    @Override
    public void parseAttribute(final ByteBuf buffer, final PathAttributesBuilder builder) throws BGPDocumentedException {
        final List<Communities> set = Lists.newArrayList();
        while (buffer.isReadable()) {
            set.add((Communities) CommunitiesParser.parseCommunity(this.refCache, buffer.slice(buffer.readerIndex(),
                    CommunitiesParser.COMMUNITY_LENGTH)));
            buffer.skipBytes(CommunitiesParser.COMMUNITY_LENGTH);
        }

        builder.setCommunities(set);
    }
}