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AlreadyConstrainedException.java
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AlreadyConstrainedException.java
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/*
* Copyright (c) 2002-2017 "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 <http://www.gnu.org/licenses/>.
*/
package org.neo4j.kernel.api.exceptions.schema;
import org.neo4j.kernel.api.TokenNameLookup;
import org.neo4j.kernel.api.exceptions.Status;
import org.neo4j.kernel.api.schema_new.LabelSchemaDescriptor;
import org.neo4j.kernel.api.schema_new.constaints.ConstraintDescriptor;
import static java.lang.String.format;
public class AlreadyConstrainedException extends SchemaKernelException
{
private static final String NO_CONTEXT_FORMAT = "Already constrained %s.";
private static final String ALREADY_CONSTRAINED_MESSAGE_PREFIX = "Constraint already exists: ";
private static final String INDEX_CONTEXT_FORMAT = "Label '%s' and property '%s' have a unique constraint defined on them, so an index is " +
"already created that matches this.";
private final ConstraintDescriptor constraint;
private final OperationContext context;
public AlreadyConstrainedException( ConstraintDescriptor constraint, OperationContext context,
TokenNameLookup tokenNameLookup )
{
super( Status.Schema.ConstraintAlreadyExists, constructUserMessage( context, tokenNameLookup, constraint ) );
this.constraint = constraint;
this.context = context;
}
public ConstraintDescriptor constraint()
{
return constraint;
}
private static String constructUserMessage( OperationContext context, TokenNameLookup tokenNameLookup,
ConstraintDescriptor constraint )
{
switch ( context )
{
case INDEX_CREATION:
// is is safe to cast here because we only support indexes on nodes atm
return messageWithLabelAndPropertyName( tokenNameLookup, INDEX_CONTEXT_FORMAT,
(LabelSchemaDescriptor) constraint.schema() );
case CONSTRAINT_CREATION:
return ALREADY_CONSTRAINED_MESSAGE_PREFIX + constraint.userDescription( tokenNameLookup );
default:
return format( NO_CONTEXT_FORMAT, constraint );
}
}
@Override
public String getUserMessage( TokenNameLookup tokenNameLookup )
{
return constructUserMessage( context, tokenNameLookup, constraint );
}
}