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.pcep.impl.object; import static org.opendaylight.protocol.util.ByteBufWriteUtil.writeUnsignedByte; import com.google.common.base.Preconditions; import io.netty.buffer.ByteBuf; import io.netty.buffer.Unpooled; import java.util.List; import org.opendaylight.protocol.pcep.spi.AbstractObjectWithTlvsParser; import org.opendaylight.protocol.pcep.spi.ObjectUtil; import org.opendaylight.protocol.pcep.spi.PCEPDeserializerException; import org.opendaylight.protocol.pcep.spi.TlvRegistry; import org.opendaylight.protocol.pcep.spi.VendorInformationTlvRegistry; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Object; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.ObjectHeader; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Tlv; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.notification.object.CNotification; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.notification.object.CNotificationBuilder; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.notification.object.c.notification.Tlvs; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.notification.object.c.notification.TlvsBuilder; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.overload.duration.tlv.OverloadDuration; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.vendor.information.tlvs.VendorInformationTlv; /** * Parser for {@link CNotification} */ public class PCEPNotificationObjectParser extends AbstractObjectWithTlvsParser<CNotificationBuilder> { public static final int CLASS = 12; public static final int TYPE = 1; /* * offsets of fields */ private static final int NT_F_OFFSET = 2; public PCEPNotificationObjectParser(final TlvRegistry tlvReg, final VendorInformationTlvRegistry viTlvReg) { super(tlvReg, viTlvReg); } @Override public CNotification parseObject(final ObjectHeader header, final ByteBuf bytes) throws PCEPDeserializerException { Preconditions.checkArgument(bytes != null && bytes.isReadable(), "Array of bytes is mandatory. Can't be null or empty."); final CNotificationBuilder builder = new CNotificationBuilder(); builder.setIgnore(header.isIgnore()); builder.setProcessingRule(header.isProcessingRule()); bytes.skipBytes(NT_F_OFFSET); builder.setType(bytes.readUnsignedByte()); builder.setValue(bytes.readUnsignedByte()); parseTlvs(builder, bytes.slice()); return builder.build(); } @Override public void addTlv(final CNotificationBuilder builder, final Tlv tlv) { if (tlv instanceof OverloadDuration && builder.getType() == 2 && builder.getValue() == 1) { builder.setTlvs(new TlvsBuilder().setOverloadDuration((OverloadDuration) tlv).build()); } } @Override public void serializeObject(final Object object, final ByteBuf buffer) { Preconditions.checkArgument(object instanceof CNotification, "Wrong instance of PCEPObject. Passed %s. Needed CNotificationObject.", object.getClass()); final CNotification notObj = (CNotification) object; final ByteBuf body = Unpooled.buffer(); body.writeZero(NT_F_OFFSET); Preconditions.checkArgument(notObj.getType() != null, "Type is mandatory."); writeUnsignedByte(notObj.getType(), body); Preconditions.checkArgument(notObj.getValue() != null, "Value is mandatory."); writeUnsignedByte(notObj.getValue(), body); serializeTlvs(notObj.getTlvs(), body); ObjectUtil.formatSubobject(TYPE, CLASS, object.isProcessingRule(), object.isIgnore(), body, buffer); } public void serializeTlvs(final Tlvs tlvs, final ByteBuf body) { if (tlvs == null) { return; } if (tlvs.getOverloadDuration() != null) { serializeTlv(tlvs.getOverloadDuration(), body); } serializeVendorInformationTlvs(tlvs.getVendorInformationTlv(), body); } @Override protected final void addVendorInformationTlvs(final CNotificationBuilder builder, final List<VendorInformationTlv> tlvs) { if (!tlvs.isEmpty()) { builder.setTlvs(new TlvsBuilder(builder.getTlvs()).setVendorInformationTlv(tlvs).build()); } } }