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ValuesIterator.java
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ValuesIterator.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.kernel.api.impl.index.collector;
import org.neo4j.collection.primitive.PrimitiveLongCollections;
/**
* Document values iterators that are primitive long iterators that can access value by field from document
* and provides information about how many items remains in the underlying source.
*/
public abstract class ValuesIterator extends PrimitiveLongCollections.PrimitiveLongBaseIterator
implements DocValuesAccess
{
public static final ValuesIterator EMPTY = new ValuesIterator( 0 )
{
@Override
public int remaining()
{
return 0;
}
@Override
protected boolean fetchNext()
{
return false;
}
@Override
public long current()
{
return 0;
}
@Override
public float currentScore()
{
return 0;
}
@Override
public long getValue( String field )
{
return 0;
}
};
protected final int size;
protected int index;
public abstract float currentScore();
ValuesIterator( int size )
{
this.size = size;
}
/**
* @return the number of docs left in this iterator.
*/
public int remaining()
{
return size - index;
}
}