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DataIntegrityValidatingStatementOperations.java
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DataIntegrityValidatingStatementOperations.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.impl.api;
import java.util.Arrays;
import org.neo4j.kernel.api.Statement;
import org.neo4j.kernel.api.StatementTokenNameLookup;
import org.neo4j.kernel.api.constraints.UniquenessConstraint;
import org.neo4j.kernel.api.exceptions.schema.AlreadyConstrainedException;
import org.neo4j.kernel.api.exceptions.schema.AlreadyIndexedException;
import org.neo4j.kernel.api.exceptions.schema.CreateConstraintFailureException;
import org.neo4j.kernel.api.exceptions.schema.DropConstraintFailureException;
import org.neo4j.kernel.api.exceptions.schema.DropIndexFailureException;
import org.neo4j.kernel.api.exceptions.schema.IllegalTokenNameException;
import org.neo4j.kernel.api.exceptions.schema.IndexBelongsToConstraintException;
import org.neo4j.kernel.api.exceptions.schema.NoSuchConstraintException;
import org.neo4j.kernel.api.exceptions.schema.NoSuchIndexException;
import org.neo4j.kernel.api.exceptions.schema.RepeatedPropertyInCompositeSchemaException;
import org.neo4j.kernel.api.exceptions.schema.SchemaKernelException.OperationContext;
import org.neo4j.kernel.api.exceptions.schema.TooManyLabelsException;
import org.neo4j.kernel.api.schema.NodePropertyDescriptor;
import org.neo4j.kernel.api.schema_new.LabelSchemaDescriptor;
import org.neo4j.kernel.api.schema_new.RelationTypeSchemaDescriptor;
import org.neo4j.kernel.api.schema_new.SchemaBoundary;
import org.neo4j.kernel.api.schema_new.SchemaDescriptor;
import org.neo4j.kernel.api.schema_new.constaints.ConstraintBoundary;
import org.neo4j.kernel.api.schema_new.constaints.ConstraintDescriptor;
import org.neo4j.kernel.api.schema_new.constaints.ConstraintDescriptorFactory;
import org.neo4j.kernel.api.schema_new.constaints.NodeExistenceConstraintDescriptor;
import org.neo4j.kernel.api.schema_new.constaints.RelExistenceConstraintDescriptor;
import org.neo4j.kernel.api.schema_new.constaints.UniquenessConstraintDescriptor;
import org.neo4j.kernel.api.schema_new.index.NewIndexDescriptor;
import org.neo4j.kernel.impl.api.operations.KeyWriteOperations;
import org.neo4j.kernel.impl.api.operations.SchemaReadOperations;
import org.neo4j.kernel.impl.api.operations.SchemaWriteOperations;
import static org.neo4j.kernel.api.schema_new.index.NewIndexDescriptor.Type.UNIQUE;
public class DataIntegrityValidatingStatementOperations implements
KeyWriteOperations,
SchemaWriteOperations
{
private final KeyWriteOperations keyWriteDelegate;
private final SchemaReadOperations schemaReadDelegate;
private final SchemaWriteOperations schemaWriteDelegate;
public DataIntegrityValidatingStatementOperations(
KeyWriteOperations keyWriteDelegate,
SchemaReadOperations schemaReadDelegate,
SchemaWriteOperations schemaWriteDelegate )
{
this.keyWriteDelegate = keyWriteDelegate;
this.schemaReadDelegate = schemaReadDelegate;
this.schemaWriteDelegate = schemaWriteDelegate;
}
@Override
public int propertyKeyGetOrCreateForName( Statement state, String propertyKey )
throws IllegalTokenNameException
{
// KISS - but refactor into a general purpose constraint checker later on
return keyWriteDelegate.propertyKeyGetOrCreateForName( state, checkValidTokenName( propertyKey ) );
}
@Override
public int relationshipTypeGetOrCreateForName( Statement state, String relationshipTypeName )
throws IllegalTokenNameException
{
return keyWriteDelegate.relationshipTypeGetOrCreateForName( state, checkValidTokenName( relationshipTypeName ) );
}
@Override
public int labelGetOrCreateForName( Statement state, String label )
throws IllegalTokenNameException, TooManyLabelsException
{
// KISS - but refactor into a general purpose constraint checker later on
return keyWriteDelegate.labelGetOrCreateForName( state, checkValidTokenName( label ) );
}
@Override
public void labelCreateForName( KernelStatement state, String labelName, int id ) throws IllegalTokenNameException, TooManyLabelsException
{
keyWriteDelegate.labelCreateForName( state, labelName, id );
}
@Override
public void propertyKeyCreateForName( KernelStatement state, String propertyKeyName, int id ) throws IllegalTokenNameException
{
keyWriteDelegate.propertyKeyCreateForName( state, propertyKeyName, id );
}
@Override
public void relationshipTypeCreateForName( KernelStatement state, String relationshipTypeName, int id ) throws IllegalTokenNameException
{
keyWriteDelegate.relationshipTypeCreateForName( state, relationshipTypeName, id );
}
@Override
public NewIndexDescriptor indexCreate( KernelStatement state, LabelSchemaDescriptor descriptor )
throws AlreadyIndexedException, AlreadyConstrainedException, RepeatedPropertyInCompositeSchemaException
{
assertValidDescriptor( descriptor, OperationContext.INDEX_CREATION );
assertIndexDoesNotExist( state, OperationContext.INDEX_CREATION, SchemaBoundary.map( descriptor ) );
return schemaWriteDelegate.indexCreate( state, descriptor );
}
@Override
public void indexDrop( KernelStatement state, NewIndexDescriptor index ) throws DropIndexFailureException
{
try
{
NewIndexDescriptor existingIndex =
schemaReadDelegate.indexGetForLabelAndPropertyKey( state, SchemaBoundary.map( index.schema() ) );
if ( existingIndex == null )
{
throw new NoSuchIndexException( index.schema() );
}
if ( existingIndex.type() == UNIQUE )
{
throw new IndexBelongsToConstraintException( index.schema() );
}
}
catch ( IndexBelongsToConstraintException | NoSuchIndexException e )
{
throw new DropIndexFailureException( index.schema(), e );
}
schemaWriteDelegate.indexDrop( state, index );
}
@Override
public void uniqueIndexDrop( KernelStatement state, NewIndexDescriptor index ) throws DropIndexFailureException
{
schemaWriteDelegate.uniqueIndexDrop( state, index );
}
@Override
public UniquenessConstraintDescriptor uniquePropertyConstraintCreate(
KernelStatement state, LabelSchemaDescriptor descriptor )
throws AlreadyConstrainedException, CreateConstraintFailureException, AlreadyIndexedException,
RepeatedPropertyInCompositeSchemaException
{
assertValidDescriptor( descriptor, OperationContext.CONSTRAINT_CREATION );
ConstraintDescriptor constraint = ConstraintDescriptorFactory.uniqueForSchema( descriptor );
assertConstraintDoesNotExist( state, constraint );
// It is not allowed to create uniqueness constraints on indexed label/property pairs
assertIndexDoesNotExist( state, OperationContext.CONSTRAINT_CREATION, SchemaBoundary.map( descriptor ) );
return schemaWriteDelegate.uniquePropertyConstraintCreate( state, descriptor );
}
@Override
public NodeExistenceConstraintDescriptor nodePropertyExistenceConstraintCreate( KernelStatement state,
LabelSchemaDescriptor descriptor) throws AlreadyConstrainedException, CreateConstraintFailureException,
RepeatedPropertyInCompositeSchemaException
{
assertValidDescriptor( descriptor, OperationContext.CONSTRAINT_CREATION );
ConstraintDescriptor constraint = ConstraintDescriptorFactory.existsForSchema( descriptor );
assertConstraintDoesNotExist( state, constraint );
return schemaWriteDelegate.nodePropertyExistenceConstraintCreate( state, descriptor );
}
@Override
public RelExistenceConstraintDescriptor relationshipPropertyExistenceConstraintCreate( KernelStatement state,
RelationTypeSchemaDescriptor descriptor )
throws AlreadyConstrainedException, CreateConstraintFailureException,
RepeatedPropertyInCompositeSchemaException
{
assertValidDescriptor( descriptor, OperationContext.CONSTRAINT_CREATION );
ConstraintDescriptor constraint = ConstraintDescriptorFactory.existsForSchema( descriptor );
assertConstraintDoesNotExist( state, constraint );
return schemaWriteDelegate.relationshipPropertyExistenceConstraintCreate( state, descriptor );
}
@Override
public void constraintDrop( KernelStatement state, ConstraintDescriptor descriptor ) throws DropConstraintFailureException
{
try
{
assertConstraintExists( state, descriptor );
}
catch ( NoSuchConstraintException e )
{
throw new DropConstraintFailureException( ConstraintBoundary.map( descriptor ), e );
}
schemaWriteDelegate.constraintDrop( state, descriptor );
}
private void assertIndexDoesNotExist( KernelStatement state, OperationContext context,
NodePropertyDescriptor descriptor )
throws AlreadyIndexedException, AlreadyConstrainedException
{
NewIndexDescriptor existingIndex = schemaReadDelegate.indexGetForLabelAndPropertyKey( state, descriptor );
if ( existingIndex != null )
{
if ( existingIndex.type() == UNIQUE )
{
throw new AlreadyConstrainedException(
new UniquenessConstraint( descriptor ), context,
new StatementTokenNameLookup( state.readOperations() ) );
}
throw new AlreadyIndexedException( descriptor, context );
}
}
private String checkValidTokenName( String name ) throws IllegalTokenNameException
{
if ( name == null || name.isEmpty() )
{
throw new IllegalTokenNameException( name );
}
return name;
}
private void assertConstraintDoesNotExist( KernelStatement state, ConstraintDescriptor constraint )
throws AlreadyConstrainedException
{
if ( schemaReadDelegate.constraintExists( state, constraint ) )
{
throw new AlreadyConstrainedException( ConstraintBoundary.map( constraint ),
OperationContext.CONSTRAINT_CREATION, new StatementTokenNameLookup( state.readOperations() ) );
}
}
private void assertConstraintExists( KernelStatement state, ConstraintDescriptor constraint )
throws NoSuchConstraintException
{
if ( !schemaReadDelegate.constraintExists( state, constraint ) )
{
throw new NoSuchConstraintException( ConstraintBoundary.map( constraint ) );
}
}
private void assertValidDescriptor( SchemaDescriptor descriptor, OperationContext context )
throws RepeatedPropertyInCompositeSchemaException
{
int numUnique = Arrays.stream( descriptor.getPropertyIds() ).distinct().toArray().length;
if ( numUnique != descriptor.getPropertyIds().length )
{
throw new RepeatedPropertyInCompositeSchemaException( descriptor, context );
}
}
}