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Simple library for generating code.
There is a newer version: 2025.02.0
/*
 * Copyright (c) 2002-2020 "Neo4j,"
 * Neo4j Sweden AB [http://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.codegen;

import java.util.function.Consumer;

class InvalidState implements MethodEmitter
{
    public static final ClassEmitter CLASS_DONE = new ClassEmitter()
    {
        @Override
        public MethodEmitter method( MethodDeclaration method )
        {
            throw new IllegalStateException( "class done" );
        }

        @Override
        public void field( FieldReference field, Expression value )
        {
            throw new IllegalStateException( "class done" );
        }

        @Override
        public void done()
        {
            throw new IllegalStateException( "class done" );
        }
    };
    public static final MethodEmitter BLOCK_CLOSED = new InvalidState( "this block has been closed" );
    public static final MethodEmitter IN_SUB_BLOCK = new InvalidState( "currently generating a sub-block of this block" );
    private final String reason;

    private InvalidState( String reason )
    {
        this.reason = reason;
    }

    @Override
    public void done()
    {
        throw new IllegalStateException( reason );
    }

    @Override
    public void expression( Expression expression )
    {
        throw new IllegalStateException( reason );
    }

    @Override
    public void put( Expression target, FieldReference field, Expression value )
    {
        throw new IllegalStateException( reason );
    }

    @Override
    public void returns()
    {
        throw new IllegalStateException( reason );
    }

    @Override
    public void returns( Expression value )
    {
        throw new IllegalStateException( reason );
    }

    @Override
    public void continues()
    {
        throw new IllegalStateException( reason );
    }

    @Override
    public void assign( LocalVariable variable, Expression value )
    {
        throw new IllegalStateException( reason );
    }

    @Override
    public void beginWhile( Expression test )
    {
        throw new IllegalStateException( reason );
    }

    @Override
    public void beginIf( Expression test )
    {
        throw new IllegalStateException( reason );
    }

    @Override
    public void beginBlock()
    {
        throw new IllegalStateException( reason );
    }

    @Override
    public void endBlock()
    {
        throw new IllegalStateException( reason );
    }

    @Override
    public  void tryCatchBlock( Consumer body, Consumer handler, LocalVariable exception, T block )
    {
        throw new IllegalStateException( reason );
    }

    @Override
    public void throwException( Expression exception )
    {
        throw new IllegalStateException( reason );
    }

    @Override
    public void declare( LocalVariable local )
    {
        throw new IllegalStateException( reason );
    }

    @Override
    public void assignVariableInScope( LocalVariable local, Expression value )
    {
        throw new IllegalStateException( reason );
    }

}