Java tutorial
/* * Copyright (c) 2015 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.bmp.spi.parser; import com.google.common.base.Preconditions; import io.netty.buffer.ByteBuf; import io.netty.buffer.ByteBufUtil; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bmp.message.rev150512.Tlv; import org.opendaylight.yangtools.concepts.Builder; import org.slf4j.Logger; import org.slf4j.LoggerFactory; public abstract class AbstractBmpMessageWithTlvParser<T extends Builder<?>> extends AbstractBmpMessageParser { private static final Logger LOG = LoggerFactory.getLogger(AbstractBmpMessageWithTlvParser.class); private final BmpTlvRegistry tlvRegistry; public AbstractBmpMessageWithTlvParser(final BmpTlvRegistry tlvRegistry) { this.tlvRegistry = tlvRegistry; } protected final void parseTlvs(final T builder, final ByteBuf bytes) throws BmpDeserializationException { Preconditions.checkArgument(bytes != null, "Array of bytes is mandatory. Can't be null."); if (!bytes.isReadable()) { return; } while (bytes.isReadable()) { final int type = bytes.readUnsignedShort(); final int length = bytes.readUnsignedShort(); if (length > bytes.readableBytes()) { throw new BmpDeserializationException("Wrong length specified. Passed: " + length + "; Expected: <= " + bytes.readableBytes() + "."); } final ByteBuf tlvBytes = bytes.readSlice(length); LOG.trace("Parsing BMP TLV : {}", ByteBufUtil.hexDump(tlvBytes)); final Tlv tlv = this.tlvRegistry.parseTlv(type, tlvBytes); if (tlv != null) { LOG.trace("Parsed BMP TLV {}.", tlv); addTlv(builder, tlv); } } } protected final void serializeTlv(final Tlv tlv, final ByteBuf buffer) { Preconditions.checkNotNull(tlv, "BMP TLV is mandatory."); LOG.trace("Serializing BMP TLV {}", tlv); this.tlvRegistry.serializeTlv(tlv, buffer); LOG.trace("Serialized BMP TLV : {}.", ByteBufUtil.hexDump(buffer)); } protected void addTlv(final T builder, final Tlv tlv) { //no TLVs by default } }