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Labels.java
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Labels.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.impl.newapi;
import java.util.Collection;
import java.util.Arrays;
import org.neo4j.collection.primitive.PrimitiveIntIterator;
import org.neo4j.collection.primitive.PrimitiveIntSet;
import org.neo4j.internal.kernel.api.LabelSet;
public class Labels implements LabelSet
{
/**
* This really only needs to be {@code int[]}, but the underlying implementation uses {@code long[]} for some
* reason.
*/
private final long[] labels;
private Labels( long[] labels )
{
this.labels = labels;
}
static Labels from( long[] labels )
{
return new Labels( labels );
}
static Labels from( Collection<Integer> integers )
{
int size = integers.size();
long[] tokens = new long[size];
int i = 0;
for ( Integer token : integers )
{
tokens[i++] = token;
}
return new Labels( tokens );
}
static Labels from( PrimitiveIntSet set )
{
long[] labelArray = new long[set.size()];
int index = 0;
PrimitiveIntIterator iterator = set.iterator();
while ( iterator.hasNext() )
{
labelArray[index++] = iterator.next();
}
return new Labels( labelArray );
}
@Override
public int numberOfLabels()
{
return labels.length;
}
@Override
public int label( int offset )
{
return (int) labels[offset];
}
@Override
public boolean contains( int labelToken )
{
for ( long label : labels )
{
if ( label == labelToken )
{
return true;
}
}
return false;
}
@Override
public String toString()
{
return "Labels" + Arrays.toString( labels );
}
public long[] all()
{
return labels;
}
}