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Neo4j property value system.
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/*
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [http://neo4j.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 .
 */
package org.neo4j.values.storable;

import org.neo4j.hashing.HashFunction;
import org.neo4j.values.utils.ValueMath;

public abstract class FloatingPointValue extends NumberValue
{
    @Override
    public final boolean equals( long x )
    {
        return NumberValues.numbersEqual( doubleValue(), x );
    }

    @Override
    public final boolean equals( double x )
    {
        return doubleValue() == x;
    }

    @Override
    protected final int computeHash()
    {
        return NumberValues.hash( doubleValue() );
    }

    @Override
    public long updateHash( HashFunction hashFunction, long hash )
    {
        return hashFunction.update( hash, Double.doubleToLongBits( doubleValue() ) );
    }

    @Override
    public boolean equalTo( Object other )
    {
        return other instanceof Value && equals( (Value) other );
    }

    @Override
    public final boolean equals( Value other )
    {
        if ( other instanceof FloatingPointValue )
        {
            FloatingPointValue that = (FloatingPointValue) other;
            return this.doubleValue() == that.doubleValue();
        }
        else if ( other instanceof IntegralValue )
        {
            IntegralValue that = (IntegralValue) other;
            return NumberValues.numbersEqual( this.doubleValue(), that.longValue() );
        }
        else
        {
            return false;
        }
    }

    @Override
    public NumberType numberType()
    {
        return NumberType.FLOATING_POINT;
    }

    @Override
    public int compareTo( IntegralValue other )
    {
        return NumberValues.compareDoubleAgainstLong( doubleValue(), other.longValue() );
    }

    @Override
    public int compareTo( FloatingPointValue other )
    {
        return Double.compare( doubleValue(), other.doubleValue() );
    }

    public boolean isNaN()
    {
        return Double.isNaN( this.doubleValue() );
    }

    @Override
    boolean ternaryUndefined()
    {
        return isNaN();
    }

    @Override
    public long longValue()
    {
        return (long) doubleValue();
    }

    @Override
    public DoubleValue minus( long b )
    {
        return ValueMath.subtract( doubleValue(), b );
    }

    @Override
    public DoubleValue minus( double b )
    {
        return ValueMath.subtract( doubleValue(), b );
    }

    @Override
    public DoubleValue plus( long b )
    {
        return ValueMath.add( doubleValue(), b );
    }

    @Override
    public DoubleValue plus( double b )
    {
        return ValueMath.add( doubleValue(), b );
    }

    @Override
    public DoubleValue times( long b )
    {
        return ValueMath.multiply( doubleValue(), b );
    }

    @Override
    public DoubleValue times( double b )
    {
        return ValueMath.multiply( doubleValue(), b );
    }

    @Override
    public DoubleValue dividedBy( long b )
    {
        return Values.doubleValue( doubleValue() / b );
    }

    @Override
    public DoubleValue dividedBy( double b )
    {
        return Values.doubleValue( doubleValue() / b );
    }
}