
org.neo4j.kernel.api.constraints.RelationshipPropertyExistenceConstraint Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of neo4j-kernel Show documentation
Show all versions of neo4j-kernel Show documentation
Neo4j kernel is a lightweight, embedded Java database designed to
store data structured as graphs rather than tables. For more
information, see http://neo4j.org.
/*
* Copyright (c) 2002-2016 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.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.kernel.api.constraints;
import org.neo4j.kernel.api.TokenNameLookup;
import org.neo4j.kernel.api.exceptions.schema.CreateConstraintFailureException;
/**
* Description of constraint enforcing relationships to contain a certain property.
*/
public class RelationshipPropertyExistenceConstraint extends RelationshipPropertyConstraint
{
public RelationshipPropertyExistenceConstraint( int relTypeId, int propertyKeyId )
{
super( relTypeId, propertyKeyId );
}
@Override
public void added( ChangeVisitor visitor ) throws CreateConstraintFailureException
{
visitor.visitAddedRelationshipPropertyExistenceConstraint( this );
}
@Override
public void removed( ChangeVisitor visitor )
{
visitor.visitRemovedRelationshipPropertyExistenceConstraint( this );
}
@Override
public String userDescription( TokenNameLookup tokenNameLookup )
{
String typeName = tokenNameLookup.relationshipTypeGetName( relationshipTypeId );
String boundIdentifier = typeName.toLowerCase();
return String.format( "CONSTRAINT ON ()-[ %s:%s ]-() ASSERT exists(%s.%s)",
boundIdentifier, typeName, boundIdentifier, tokenNameLookup.propertyKeyGetName( propertyKeyId ) );
}
@Override
public String toString()
{
return String.format( "CONSTRAINT ON ()-[ n:relationshipType[%s] ]-() ASSERT exists(n.property[%s])",
relationshipTypeId, propertyKeyId );
}
}