/*
 * 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 io.netty.buffer.ByteBuf;

import org.opendaylight.protocol.bgp.parser.BGPDocumentedException;
import org.opendaylight.protocol.bgp.parser.BGPError;
import org.opendaylight.protocol.bgp.parser.BGPParsingException;
import org.opendaylight.protocol.bgp.parser.spi.AttributeParser;
import org.opendaylight.protocol.bgp.parser.spi.NlriRegistry;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.update.PathAttributesBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.PathAttributes2;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.PathAttributes2Builder;

import com.google.common.base.Preconditions;

public final class MPUnreachAttributeParser implements AttributeParser {
	public static final int TYPE = 15;

	private final NlriRegistry reg;

	public MPUnreachAttributeParser(final NlriRegistry reg) {
		this.reg = Preconditions.checkNotNull(reg);
	}

	@Override
	public void parseAttribute(final ByteBuf buffer, final PathAttributesBuilder builder) throws BGPDocumentedException {
		try {
			final PathAttributes2 a = new PathAttributes2Builder().setMpUnreachNlri(this.reg.parseMpUnreach(buffer)).build();
			builder.addAugmentation(PathAttributes2.class, a);
		} catch (final BGPParsingException e) {
			throw new BGPDocumentedException("Could not parse MP_UNREACH_NLRI", BGPError.OPT_ATTR_ERROR, e);
		}
	}
}