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VirtualValue.java
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VirtualValue.java
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/*
* Copyright (c) 2002-2018 "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.values;
import java.util.Comparator;
import org.neo4j.values.virtual.VirtualValueGroup;
import static org.neo4j.values.storable.Values.NO_VALUE;
/**
* Value that can exist transiently during computations, but that cannot be stored as a property value. A Virtual
* Value could be a NodeReference for example.
*/
public abstract class VirtualValue extends AnyValue
{
@Override
public final boolean eq( Object other )
{
if ( other == null )
{
return false;
}
if ( other instanceof SequenceValue && this.isSequenceValue() )
{
return ((SequenceValue) this).equals( (SequenceValue) other );
}
return other instanceof VirtualValue && equals( (VirtualValue) other );
}
public abstract boolean equals( VirtualValue other );
@Override
public Boolean ternaryEquals( AnyValue other )
{
if ( other == null || other == NO_VALUE )
{
return null;
}
if ( other instanceof SequenceValue && this.isSequenceValue() )
{
return ((SequenceValue) this).ternaryEquality( (SequenceValue) other );
}
if ( other instanceof VirtualValue && ((VirtualValue) other).valueGroup() == valueGroup() )
{
return equals( (VirtualValue) other );
}
return Boolean.FALSE;
}
public abstract VirtualValueGroup valueGroup();
public abstract int compareTo( VirtualValue other, Comparator<AnyValue> comparator );
}