Java tutorial
/* * Copyright (c) 2013 Pantheon Technologies s.r.o. 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.protocol.impl.deserialization.match; import io.netty.buffer.ByteBuf; import org.opendaylight.openflowjava.protocol.api.extensibility.HeaderDeserializer; 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; /** * @author michal.polkorab * */ public abstract class AbstractOxmMatchEntryDeserializer implements HeaderDeserializer<MatchEntry> { @Override public MatchEntry deserializeHeader(ByteBuf input) { MatchEntryBuilder builder = processHeader(getOxmClass(), getOxmField(), input); return builder.build(); } /** * @return oxm_field class */ protected abstract Class<? extends MatchField> getOxmField(); /** * @return oxm_class class */ protected abstract Class<? extends OxmClassBase> getOxmClass(); /** * Prepares match entry header - sets oxm_class, oxm_field, hasMask * + sets the buffer.readerIndex() to the end of match entry * - where augmentation starts * @param oxmClass oxm class type * @param oxmField oxm field type * @param input input bytebuf * @return MatchEntriesBuilder which can be filled with MatchEntry augmentation */ protected MatchEntryBuilder processHeader(Class<? extends OxmClassBase> oxmClass, Class<? extends MatchField> oxmField, ByteBuf input) { MatchEntryBuilder builder = new MatchEntryBuilder(); builder.setOxmClass(oxmClass); // skip oxm_class (provided) input.skipBytes(EncodeConstants.SIZE_OF_SHORT_IN_BYTES); builder.setOxmMatchField(oxmField); boolean hasMask = (input.readUnsignedByte() & 1) != 0; builder.setHasMask(hasMask); // skip match entry length - not needed input.skipBytes(EncodeConstants.SIZE_OF_BYTE_IN_BYTES); return builder; } }