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Primitive.java
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Primitive.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.collection.primitive;
import org.eclipse.collections.api.iterator.IntIterator;
import org.eclipse.collections.api.iterator.LongIterator;
import org.eclipse.collections.api.map.primitive.MutableLongLongMap;
import org.eclipse.collections.impl.map.mutable.primitive.LongLongHashMap;
import org.neo4j.collection.primitive.hopscotch.IntKeyObjectValueTable;
import org.neo4j.collection.primitive.hopscotch.IntKeyTable;
import org.neo4j.collection.primitive.hopscotch.IntKeyUnsafeTable;
import org.neo4j.collection.primitive.hopscotch.LongKeyIntValueTable;
import org.neo4j.collection.primitive.hopscotch.LongKeyObjectValueTable;
import org.neo4j.collection.primitive.hopscotch.LongKeyTable;
import org.neo4j.collection.primitive.hopscotch.LongKeyUnsafeTable;
import org.neo4j.collection.primitive.hopscotch.PrimitiveIntHashSet;
import org.neo4j.collection.primitive.hopscotch.PrimitiveIntObjectHashMap;
import org.neo4j.collection.primitive.hopscotch.PrimitiveLongHashSet;
import org.neo4j.collection.primitive.hopscotch.PrimitiveLongIntHashMap;
import org.neo4j.collection.primitive.hopscotch.PrimitiveLongObjectHashMap;
import org.neo4j.memory.GlobalMemoryTracker;
import org.neo4j.memory.MemoryAllocationTracker;
import static org.neo4j.collection.primitive.hopscotch.HopScotchHashingAlgorithm.NO_MONITOR;
/**
* Convenient factory for common primitive sets and maps.
*
* @see PrimitiveIntCollections
* @see PrimitiveLongCollections
*/
public class Primitive
{
/**
* Used as value marker for sets, where values aren't applicable. The hop scotch algorithm still
* deals with values so having this will have no-value collections, like sets communicate
* the correct semantics to the algorithm.
*/
public static final Object VALUE_MARKER = new Object();
public static final int DEFAULT_HEAP_CAPACITY = 1 << 4;
public static final int DEFAULT_OFFHEAP_CAPACITY = 1 << 20;
private Primitive()
{
}
// Some example would be...
public static PrimitiveLongSet longSet()
{
return longSet( DEFAULT_HEAP_CAPACITY );
}
public static PrimitiveLongSet longSet( int initialCapacity )
{
return new PrimitiveLongHashSet( new LongKeyTable<>( initialCapacity, VALUE_MARKER ),
VALUE_MARKER, NO_MONITOR );
}
public static PrimitiveLongSet offHeapLongSet()
{
return offHeapLongSet( GlobalMemoryTracker.INSTANCE );
}
public static PrimitiveLongSet offHeapLongSet( MemoryAllocationTracker allocationTracker )
{
return offHeapLongSet( DEFAULT_OFFHEAP_CAPACITY, allocationTracker );
}
public static PrimitiveLongSet offHeapLongSet( int initialCapacity, MemoryAllocationTracker allocationTracker )
{
return new PrimitiveLongHashSet( new LongKeyUnsafeTable<>( initialCapacity, VALUE_MARKER, allocationTracker ),
VALUE_MARKER, NO_MONITOR );
}
public static PrimitiveLongIntMap longIntMap()
{
return longIntMap( DEFAULT_HEAP_CAPACITY );
}
public static PrimitiveLongIntMap longIntMap( int initialCapacity )
{
return new PrimitiveLongIntHashMap( new LongKeyIntValueTable( initialCapacity ), NO_MONITOR );
}
public static MutableLongLongMap longLongMap()
{
return longLongMap( DEFAULT_HEAP_CAPACITY );
}
public static MutableLongLongMap longLongMap( int initialCapacity )
{
return new LongLongHashMap( initialCapacity );
}
public static <VALUE> PrimitiveLongObjectMap<VALUE> longObjectMap()
{
return longObjectMap( DEFAULT_HEAP_CAPACITY );
}
public static <VALUE> PrimitiveLongObjectMap<VALUE> longObjectMap( int initialCapacity )
{
return new PrimitiveLongObjectHashMap<>( new LongKeyObjectValueTable<VALUE>( initialCapacity ), NO_MONITOR );
}
public static PrimitiveIntSet intSet()
{
return intSet( DEFAULT_HEAP_CAPACITY );
}
public static PrimitiveIntSet intSet( int initialCapacity )
{
return new PrimitiveIntHashSet( new IntKeyTable<>( initialCapacity, VALUE_MARKER ),
VALUE_MARKER, NO_MONITOR );
}
public static PrimitiveIntSet offHeapIntSet()
{
return offHeapIntSet( GlobalMemoryTracker.INSTANCE );
}
public static PrimitiveIntSet offHeapIntSet( MemoryAllocationTracker allocationTracker )
{
return new PrimitiveIntHashSet( new IntKeyUnsafeTable<>( DEFAULT_OFFHEAP_CAPACITY, VALUE_MARKER, allocationTracker ),
VALUE_MARKER, NO_MONITOR );
}
public static PrimitiveIntSet offHeapIntSet( int initialCapacity, MemoryAllocationTracker allocationTracker )
{
return new PrimitiveIntHashSet( new IntKeyUnsafeTable<>( initialCapacity, VALUE_MARKER, allocationTracker ),
VALUE_MARKER, NO_MONITOR );
}
public static <VALUE> PrimitiveIntObjectMap<VALUE> intObjectMap()
{
return intObjectMap( DEFAULT_HEAP_CAPACITY );
}
public static <VALUE> PrimitiveIntObjectMap<VALUE> intObjectMap( int initialCapacity )
{
return new PrimitiveIntObjectHashMap<>( new IntKeyObjectValueTable<>( initialCapacity ), NO_MONITOR );
}
public static LongIterator iterator( final long... longs )
{
return new LongIterator()
{
int i;
@Override
public boolean hasNext()
{
return i < longs.length;
}
@Override
public long next()
{
return longs[i++];
}
};
}
public static IntIterator iterator( final int... ints )
{
return new IntIterator()
{
int i;
@Override
public boolean hasNext()
{
return i < ints.length;
}
@Override
public int next()
{
return ints[i++];
}
};
}
}