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The core of Neo4j Bolt Protocol, this contains the state machine for Bolt sessions.

There is a newer version: 5.26.1

/*
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [https://neo4j.com]
 *
 * This file is part of Neo4j.
 *
 * Neo4j is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see .
 */
package org.neo4j.bolt.protocol.v57;

import org.neo4j.bolt.fsm.StateMachineConfiguration;
import org.neo4j.bolt.negotiation.ProtocolVersion;
import org.neo4j.bolt.protocol.AbstractBoltProtocol;
import org.neo4j.bolt.protocol.common.fsm.States;
import org.neo4j.bolt.protocol.common.fsm.response.metadata.MetadataHandler;
import org.neo4j.bolt.protocol.common.fsm.transition.authentication.AuthenticationStateTransition;
import org.neo4j.bolt.protocol.common.fsm.transition.authentication.LogoffStateTransition;
import org.neo4j.bolt.protocol.common.fsm.transition.ready.CreateAutocommitStatementStateTransition;
import org.neo4j.bolt.protocol.common.fsm.transition.ready.CreateTransactionStateTransition;
import org.neo4j.bolt.protocol.common.fsm.transition.ready.RouteStateTransition;
import org.neo4j.bolt.protocol.common.fsm.transition.ready.TelemetryStateTransition;
import org.neo4j.bolt.protocol.v56.metadata.MetadataHandlerV56;

public final class BoltProtocolV57 extends AbstractBoltProtocol {
    public static final ProtocolVersion VERSION = new ProtocolVersion(5, 7);

    private static final BoltProtocolV57 INSTANCE = new BoltProtocolV57();

    private BoltProtocolV57() {}

    public static BoltProtocolV57 getInstance() {
        return INSTANCE;
    }

    @Override
    public ProtocolVersion version() {
        return VERSION;
    }

    @Override
    protected StateMachineConfiguration.Factory createStateMachine() {
        return super.createStateMachine()
                .withState(States.AUTHENTICATION, AuthenticationStateTransition.getInstance())
                .withState(
                        States.READY,
                        CreateTransactionStateTransition.getInstance(),
                        RouteStateTransition.getInstance(),
                        CreateAutocommitStatementStateTransition.getInstance(),
                        LogoffStateTransition.getInstance(),
                        TelemetryStateTransition.getInstance());
    }

    @Override
    public MetadataHandler metadataHandler() {
        return MetadataHandlerV56.getInstance();
    }
}