Java tutorial
/* * 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 io.netty.buffer.Unpooled; import java.util.List; import org.opendaylight.protocol.bgp.parser.spi.AttributeParser; import org.opendaylight.protocol.bgp.parser.spi.AttributeSerializer; import org.opendaylight.protocol.bgp.parser.spi.AttributeUtil; import org.opendaylight.protocol.util.Ipv4Util; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.path.attributes.Attributes; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.path.attributes.AttributesBuilder; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.path.attributes.attributes.ClusterId; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.path.attributes.attributes.ClusterIdBuilder; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.ClusterIdentifier; import org.opendaylight.yangtools.yang.binding.DataObject; public final class ClusterIdAttributeParser implements AttributeParser, AttributeSerializer { public static final int TYPE = 10; @Override public void parseAttribute(final ByteBuf buffer, final AttributesBuilder builder) { final List<ClusterIdentifier> list = Lists.newArrayList(); while (buffer.isReadable()) { list.add(new ClusterIdentifier(Ipv4Util.addressForByteBuf(buffer))); } builder.setClusterId(new ClusterIdBuilder().setCluster(list).build()); } @Override public void serializeAttribute(final DataObject attribute, final ByteBuf byteAggregator) { Preconditions.checkArgument(attribute instanceof Attributes, "Attribute parameter is not a PathAttribute object."); final ClusterId cid = ((Attributes) attribute).getClusterId(); if (cid == null) { return; } final List<ClusterIdentifier> cluster = cid.getCluster(); if (cluster == null || cluster.isEmpty()) { return; } final ByteBuf clusterIdBuffer = Unpooled.buffer(); for (final ClusterIdentifier clusterIdentifier : cid.getCluster()) { clusterIdBuffer.writeBytes(Ipv4Util.bytesForAddress(clusterIdentifier)); } AttributeUtil.formatAttribute(AttributeUtil.OPTIONAL, TYPE, clusterIdBuffer, byteAggregator); } }