com.epam.deltix.qsrv.hf.tickdb.comm.SelectionOptionsCodec Maven / Gradle / Ivy

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/*
 * Copyright 2023 EPAM Systems, Inc
 *
 * See the NOTICE file distributed with this work for additional information
 * regarding copyright ownership. Licensed under the Apache License,
 * Version 2.0 (the "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package com.epam.deltix.qsrv.hf.tickdb.comm;

import com.epam.deltix.qsrv.hf.pub.ChannelCompression;
import com.epam.deltix.qsrv.hf.pub.ChannelPerformance;
import com.epam.deltix.qsrv.hf.pub.util.SerializationUtils;
import com.epam.deltix.qsrv.hf.tickdb.pub.SelectionOptions;

import java.io.DataOutputStream;
import java.io.IOException;
import java.io.DataInputStream;

/**
 * 
 */
public abstract class SelectionOptionsCodec {

    public static final int VERSION_WITH_FIXED_STREAM_TYPE_SUPPORT = 99;
    public static final int VERSION_WITH_SPACES_SUPPORT = 110;

    public static void write(DataOutputStream out, SelectionOptions options, int serverVersion)
            throws IOException
    {
        out.writeBoolean(options.live);
        out.writeBoolean(options.reversed);
        out.writeBoolean(options.allowLateOutOfOrder);
        out.writeLong(options.shiftOffset);
        out.writeBoolean (options.rebroadcast);

        if (serverVersion <= VERSION_WITH_FIXED_STREAM_TYPE_SUPPORT) {
            out.writeUTF (options.channelPerformance.toString());
            out.writeUTF (options.compression.toString());
        } else {
            out.writeInt(options.channelPerformance.ordinal());
            out.writeInt(options.compression.ordinal());
        }
        out.writeBoolean (options.realTimeNotification);
        out.writeBoolean (options.versionTracking);
        out.writeBoolean (options.ordered);

        if (serverVersion >= VERSION_WITH_FIXED_STREAM_TYPE_SUPPORT)
            out.writeBoolean(options.restrictStreamType);

        if (serverVersion >= VERSION_WITH_SPACES_SUPPORT) {
            String[] spaces = options.spaces;

            if (serverVersion >= 132) {
                out.writeInt(spaces != null ? spaces.length : -1);
                for (int i = 0; spaces != null && i < spaces.length; i++)
                    SerializationUtils.writeNullableString(spaces[i], out);
            } else {
                if (spaces != null && spaces.length == 1)
                    SerializationUtils.writeNullableString(options.spaces[0], out);
                else
                    throw new UnsupportedOperationException("Server version: " + serverVersion + " is not supporting multiply spaces.");
            }
        }
    }

    public static void read(DataInputStream in, SelectionOptions options, int clientVersion) throws IOException {
        options.raw = true;
        options.live = in.readBoolean();
        options.reversed = in.readBoolean();
        options.allowLateOutOfOrder = in.readBoolean();
        options.shiftOffset = in.readLong();
        options.rebroadcast = in.readBoolean();

        if (clientVersion <= VERSION_WITH_FIXED_STREAM_TYPE_SUPPORT) {
            options.channelPerformance = Enum.valueOf(ChannelPerformance.class, in.readUTF());
            options.compression = Enum.valueOf(ChannelCompression.class, in.readUTF());
        } else {
            options.channelPerformance = ChannelPerformance.values()[in.readInt()];
            options.compression = ChannelCompression.values()[in.readInt()];
        }

        options.realTimeNotification = in.readBoolean();
        options.versionTracking = in.readBoolean();
        options.ordered = in.readBoolean();

        options.restrictStreamType = false;
        if (clientVersion >= 99)
            options.restrictStreamType = in.readBoolean();

        if (clientVersion >= VERSION_WITH_SPACES_SUPPORT) {
            if (clientVersion >= 132) {
                int size = in.readInt();
                if (size == 1) {
                    options.withSpace(SerializationUtils.readNullableString(in));
                } else if (size >= 1) {
                    options.spaces = new String[size];
                    for (int i = 0; i < size; i++)
                        options.spaces[i] = SerializationUtils.readNullableString(in);
                }
            } else {
                String space = SerializationUtils.readNullableString(in);
                options.spaces = (space != null) ? new String[] {space} : null;
            }
        }
    }
}