Java tutorial
/** * Copyright 2012 Rainer Bieniek (Rainer.Bieniek@web.de) * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * * File: org.bgp4j.netty.protocol.update.CommunityPathAttributeCodecHandler.java */ package io.netlibs.bgp.netty.protocol.update; import io.netlibs.bgp.protocol.BGPv4Constants; import io.netlibs.bgp.protocol.attributes.CommunityMember; import io.netlibs.bgp.protocol.attributes.CommunityPathAttribute; import io.netty.buffer.ByteBuf; import io.netty.buffer.Unpooled; /** * @author Rainer Bieniek (Rainer.Bieniek@web.de) * */ public class CommunityPathAttributeCodecHandler extends PathAttributeCodecHandler<CommunityPathAttribute> { /* * (non-Javadoc) * * @see org.bgp4j.netty.protocol.update.PathAttributeCodecHandler#typeCode(org.bgp4j.netty.protocol.update.PathAttribute) */ @Override public int typeCode(final CommunityPathAttribute attr) { return BGPv4Constants.BGP_PATH_ATTRIBUTE_TYPE_COMMUNITIES; } /* * (non-Javadoc) * * @see org.bgp4j.netty.protocol.update.PathAttributeCodecHandler#valueLength(org.bgp4j.netty.protocol.update.PathAttribute) */ @Override public int valueLength(final CommunityPathAttribute attr) { int size = 0; if (attr.getMembers() != null) { size += 4 * attr.getMembers().size(); } return size; } /* * (non-Javadoc) * * @see org.bgp4j.netty.protocol.update.PathAttributeCodecHandler#encodeValue(org.bgp4j.netty.protocol.update.PathAttribute) */ @Override public ByteBuf encodeValue(final CommunityPathAttribute attr) { final ByteBuf buffer = Unpooled.buffer(this.valueLength(attr)); if (attr.getMembers() != null) { for (final CommunityMember member : attr.getMembers()) { buffer.writeShort(member.getAsNumber()); buffer.writeShort(member.getValue()); } } return buffer; } }