org.opendaylight.openflowjava.protocol.impl.deserialization.factories.OF10QueueGetConfigReplyMessageFactory.java Source code

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Here is the source code for org.opendaylight.openflowjava.protocol.impl.deserialization.factories.OF10QueueGetConfigReplyMessageFactory.java

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/*
 * 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.factories;

import io.netty.buffer.ByteBuf;

import java.util.ArrayList;
import java.util.List;

import org.opendaylight.openflowjava.protocol.impl.deserialization.OFDeserializer;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.augments.rev131002.RateQueueProperty;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.augments.rev131002.RateQueuePropertyBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.PortNumber;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.QueueId;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.QueueProperties;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.GetQueueConfigOutput;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.GetQueueConfigOutputBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.queue.get.config.reply.Queues;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.queue.get.config.reply.QueuesBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.queue.property.header.QueueProperty;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.queue.property.header.QueuePropertyBuilder;

/**
 * Translates QueueGetConfigReply messages (OpenFlow v1.0)
 * @author michal.polkorab
 */
public class OF10QueueGetConfigReplyMessageFactory implements OFDeserializer<GetQueueConfigOutput> {

    private static final byte PADDING_IN_QUEUE_GET_CONFIG_REPLY_HEADER = 6;
    private static final byte PADDING_IN_PACKET_QUEUE_HEADER = 2;
    private static final byte PADDING_IN_QUEUE_PROPERTY_HEADER = 4;
    private static final byte PADDING_IN_RATE_QUEUE_PROPERTY = 6;
    private static final byte PACKET_QUEUE_HEADER_LENGTH = 8;

    private static OF10QueueGetConfigReplyMessageFactory instance;

    private OF10QueueGetConfigReplyMessageFactory() {
        // singleton
    }

    /**
     * 
     * @return singleton factory
     */
    public static synchronized OF10QueueGetConfigReplyMessageFactory getInstance() {

        if (instance == null) {
            instance = new OF10QueueGetConfigReplyMessageFactory();
        }
        return instance;
    }

    @Override
    public GetQueueConfigOutput bufferToMessage(ByteBuf rawMessage, short version) {
        GetQueueConfigOutputBuilder builder = new GetQueueConfigOutputBuilder();
        builder.setVersion(version);
        builder.setXid((rawMessage.readUnsignedInt()));
        builder.setPort(new PortNumber((long) rawMessage.readUnsignedShort()));
        rawMessage.skipBytes(PADDING_IN_QUEUE_GET_CONFIG_REPLY_HEADER);
        builder.setQueues(createQueuesList(rawMessage));
        return builder.build();
    }

    private static List<Queues> createQueuesList(ByteBuf input) {
        List<Queues> queuesList = new ArrayList<>();
        while (input.readableBytes() > 0) {
            QueuesBuilder queueBuilder = new QueuesBuilder();
            queueBuilder.setQueueId(new QueueId(input.readUnsignedInt()));
            int length = input.readUnsignedShort();
            input.skipBytes(PADDING_IN_PACKET_QUEUE_HEADER);
            queueBuilder.setQueueProperty(createPropertiesList(input, length - PACKET_QUEUE_HEADER_LENGTH));
            queuesList.add(queueBuilder.build());
        }
        return queuesList;
    }

    private static List<QueueProperty> createPropertiesList(ByteBuf input, int length) {
        int propertiesLength = length;
        List<QueueProperty> propertiesList = new ArrayList<>();
        while (propertiesLength > 0) {
            QueuePropertyBuilder propertiesBuilder = new QueuePropertyBuilder();
            QueueProperties property = QueueProperties.forValue(input.readUnsignedShort());
            propertiesBuilder.setProperty(property);
            propertiesLength -= input.readUnsignedShort();
            input.skipBytes(PADDING_IN_QUEUE_PROPERTY_HEADER);
            if (property.equals(QueueProperties.OFPQTMINRATE)) {
                RateQueuePropertyBuilder rateBuilder = new RateQueuePropertyBuilder();
                rateBuilder.setRate(input.readUnsignedShort());
                propertiesBuilder.addAugmentation(RateQueueProperty.class, rateBuilder.build());
                input.skipBytes(PADDING_IN_RATE_QUEUE_PROPERTY);
            }
            propertiesList.add(propertiesBuilder.build());
        }
        return propertiesList;
    }
}