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.ietf.stateful07; import static org.opendaylight.protocol.util.ByteBufWriteUtil.writeUnsignedInt; 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.ietf.stateful.rev131222.SrpIdNumber; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.srp.object.Srp; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.srp.object.SrpBuilder; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.srp.object.srp.Tlvs; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.srp.object.srp.TlvsBuilder; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.symbolic.path.name.tlv.SymbolicPathName; 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.path.setup.type.tlv.PathSetupType; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.vendor.information.tlvs.VendorInformationTlv; /** * Parser for {@link Srp} */ public class Stateful07SrpObjectParser extends AbstractObjectWithTlvsParser<TlvsBuilder> { public static final int CLASS = 33; public static final int TYPE = 1; protected static final int FLAGS_SIZE = 32; protected static final int SRP_ID_SIZE = 4; protected static final int MIN_SIZE = FLAGS_SIZE / Byte.SIZE + SRP_ID_SIZE; protected Stateful07SrpObjectParser(final TlvRegistry tlvReg, final VendorInformationTlvRegistry viTlvReg) { super(tlvReg, viTlvReg); } @Override public Srp 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."); if (bytes.readableBytes() < MIN_SIZE) { throw new PCEPDeserializerException("Wrong length of array of bytes. Passed: " + bytes.readableBytes() + "; Expected: >=" + MIN_SIZE + "."); } final SrpBuilder builder = new SrpBuilder(); builder.setIgnore(header.isIgnore()); builder.setProcessingRule(header.isProcessingRule()); parseFlags(builder, bytes); builder.setOperationId(new SrpIdNumber(bytes.readUnsignedInt())); final TlvsBuilder tlvsBuilder = new TlvsBuilder(); parseTlvs(tlvsBuilder, bytes.slice()); builder.setTlvs(tlvsBuilder.build()); return builder.build(); } protected void parseFlags(final SrpBuilder builder, final ByteBuf bytes) { bytes.skipBytes(FLAGS_SIZE / Byte.SIZE); } @Override public void addTlv(final TlvsBuilder builder, final Tlv tlv) { if (tlv instanceof SymbolicPathName) { builder.setSymbolicPathName((SymbolicPathName) tlv); } if (tlv instanceof PathSetupType) { builder.setPathSetupType((PathSetupType) tlv); } } @Override public void serializeObject(final Object object, final ByteBuf buffer) { Preconditions.checkArgument(object instanceof Srp, "Wrong instance of PCEPObject. Passed %s . Needed SrpObject.", object.getClass()); final Srp srp = (Srp) object; final ByteBuf body = Unpooled.buffer(); serializeFlags(srp, body); final SrpIdNumber srpId = srp.getOperationId(); Preconditions.checkArgument(srpId != null, "SrpId is mandatory."); writeUnsignedInt(srpId.getValue(), body); serializeTlvs(srp.getTlvs(), body); ObjectUtil.formatSubobject(TYPE, CLASS, object.isProcessingRule(), object.isIgnore(), body, buffer); } protected void serializeFlags(final Srp srp, final ByteBuf body) { body.writeZero(FLAGS_SIZE / Byte.SIZE); } public void serializeTlvs(final Tlvs tlvs, final ByteBuf body) { if (tlvs == null) { return; } if (tlvs.getSymbolicPathName() != null) { serializeTlv(tlvs.getSymbolicPathName(), body); } if (tlvs.getPathSetupType() != null) { serializeTlv(tlvs.getPathSetupType(), body); } } @Override protected final void addVendorInformationTlvs(final TlvsBuilder builder, final List<VendorInformationTlv> tlvs) { if (!tlvs.isEmpty()) { builder.setVendorInformationTlv(tlvs); } } }