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CompiledHelpers.java
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CompiledHelpers.java
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/*
* Copyright (c) 2002-2018 "Neo4j,"
* Neo4j Sweden AB [http://neo4j.com]
*
* This file is part of Neo4j Enterprise Edition. The included source
* code can be redistributed and/or modified under the terms of the
* GNU AFFERO GENERAL PUBLIC LICENSE Version 3
* (http://www.fsf.org/licensing/licenses/agpl-3.0.html) with the
* Commons Clause, as found in the associated LICENSE.txt file.
*
* 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 Affero General Public License for more details.
*
* Neo4j object code can be licensed independently from the source
* under separate terms from the AGPL. Inquiries can be directed to:
* licensing@neo4j.com
*
* More information is also available at:
* https://neo4j.com/licensing/
*/
package org.neo4j.cypher.internal.runtime.compiled.expressions;
import org.opencypher.v9_0.util.CypherTypeException;
import org.neo4j.cypher.internal.runtime.interpreted.ExecutionContext;
import org.neo4j.graphdb.NotFoundException;
import org.neo4j.values.AnyValue;
import org.neo4j.values.storable.BooleanValue;
import org.neo4j.values.storable.Value;
import static org.neo4j.values.storable.Values.NO_VALUE;
/**
* Contains helper methods used from compiled expressions
*/
@SuppressWarnings( "unused" )
public final class CompiledHelpers
{
private CompiledHelpers()
{
throw new UnsupportedOperationException( "do not instantiate" );
}
public static Value assertBooleanOrNoValue( AnyValue value )
{
if ( value != NO_VALUE && !(value instanceof BooleanValue ) )
{
throw new CypherTypeException( String.format( "Don't know how to treat a predicate: %s", value.toString() ),
null );
}
return (Value) value;
}
public static AnyValue loadVariable( ExecutionContext ctx, String name )
{
if ( !ctx.contains( name ) )
{
throw new NotFoundException( String.format( "Unknown variable `%s`.", name ) );
}
return ctx.apply( name );
}
}