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RelationshipStateImpl.java
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RelationshipStateImpl.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.state;
import java.util.Iterator;
import org.neo4j.kernel.api.exceptions.schema.ConstraintValidationException;
import org.neo4j.kernel.impl.api.RelationshipVisitor;
import org.neo4j.storageengine.api.StorageProperty;
import org.neo4j.storageengine.api.txstate.RelationshipState;
import static java.util.Collections.emptyIterator;
public class RelationshipStateImpl extends PropertyContainerStateImpl implements RelationshipState
{
private long startNode = -1;
private long endNode = -1;
private int type = -1;
RelationshipStateImpl( long id )
{
super( id );
}
public void setMetaData( long startNode, long endNode, int type )
{
this.startNode = startNode;
this.endNode = endNode;
this.type = type;
}
@Override
public <EX extends Exception> boolean accept( RelationshipVisitor<EX> visitor ) throws EX
{
if ( type != -1 )
{
visitor.visit( getId(), type, startNode, endNode );
return true;
}
return false;
}
public abstract static class Defaults extends StateDefaults<Long, RelationshipState, RelationshipStateImpl>
{
@Override
RelationshipStateImpl createValue( Long id, TxState state )
{
return new RelationshipStateImpl( id );
}
@Override
RelationshipState defaultValue()
{
return DEFAULT;
}
private static final RelationshipState DEFAULT = new RelationshipState()
{
private UnsupportedOperationException notDefined( String field )
{
return new UnsupportedOperationException( field + " not defined" );
}
@Override
public long getId()
{
throw notDefined( "id" );
}
@Override
public <EX extends Exception> boolean accept( RelationshipVisitor<EX> visitor ) throws EX
{
return false;
}
@Override
public Iterator<StorageProperty> addedProperties()
{
return emptyIterator();
}
@Override
public Iterator<StorageProperty> changedProperties()
{
return emptyIterator();
}
@Override
public Iterator<Integer> removedProperties()
{
return emptyIterator();
}
@Override
public Iterator<StorageProperty> addedAndChangedProperties()
{
return emptyIterator();
}
@Override
public Iterator<StorageProperty> augmentProperties( Iterator<StorageProperty> iterator )
{
return iterator;
}
@Override
public void accept( Visitor visitor ) throws ConstraintValidationException
{
}
public boolean hasPropertyChanges()
{
return false;
}
@Override
public StorageProperty getChangedProperty( int propertyKeyId )
{
return null;
}
@Override
public StorageProperty getAddedProperty( int propertyKeyId )
{
return null;
}
@Override
public boolean isPropertyChangedOrRemoved( int propertyKey )
{
return false;
}
@Override
public boolean isPropertyRemoved( int propertyKeyId )
{
return false;
}
};
}
}