Java tutorial
/* * Copyright (c) 2014, 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.openflowjava.nx.codec.match; import io.netty.buffer.ByteBuf; import org.opendaylight.openflowjava.protocol.api.extensibility.OFDeserializer; import org.opendaylight.openflowjava.protocol.api.extensibility.OFSerializer; import org.opendaylight.openflowjava.protocol.api.util.EncodeConstants; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev150225.MatchField; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev150225.OxmClassBase; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev150225.match.entries.grouping.MatchEntry; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev150225.match.entries.grouping.MatchEntryBuilder; public abstract class AbstractMatchCodec implements OFSerializer<MatchEntry>, OFDeserializer<MatchEntry> { private NxmHeader headerWithMask; private NxmHeader headerWithoutMask; protected MatchEntryBuilder deserializeHeader(ByteBuf message) { MatchEntryBuilder builder = new MatchEntryBuilder(); builder.setOxmClass(getOxmClass()); // skip oxm_class - provided message.skipBytes(EncodeConstants.SIZE_OF_SHORT_IN_BYTES); builder.setOxmMatchField(getNxmField()); boolean hasMask = (message.readUnsignedByte() & 1) != 0; builder.setHasMask(hasMask); // skip match entry length - not needed message.skipBytes(EncodeConstants.SIZE_OF_BYTE_IN_BYTES); return builder; } protected void serializeHeader(MatchEntry input, ByteBuf outBuffer) { outBuffer.writeInt(serializeHeaderToLong(input.isHasMask()).intValue()); } private Long serializeHeaderToLong(boolean hasMask) { if (hasMask) { return getHeaderWithHasMask().toLong(); } return getHeaderWithoutHasMask().toLong(); } public NxmHeader getHeaderWithoutHasMask() { if (headerWithoutMask == null) { headerWithoutMask = new NxmHeader(getOxmClassCode(), getNxmFieldCode(), false, getValueLength()); } return headerWithoutMask; } public NxmHeader getHeaderWithHasMask() { if (headerWithMask == null) { headerWithMask = new NxmHeader(getOxmClassCode(), getNxmFieldCode(), true, getValueLength()); } return headerWithMask; } /** * @return numeric representation of nxm_field */ public abstract int getNxmFieldCode(); /** * @return numeric representation of oxm_class */ public abstract int getOxmClassCode(); /** * @return match entry value length */ public abstract int getValueLength(); /** * @return nxm_field class */ public abstract Class<? extends MatchField> getNxmField(); /** * @return oxm_class class */ public abstract Class<? extends OxmClassBase> getOxmClass(); }