SquirrelJME/SquirrelJME

// -*- Mode: Java; indent-tabs-mode: t; tab-width: 4 -*-
// ---------------------------------------------------------------------------
// SquirrelJME
//     Copyright (C) Stephanie Gawroriski <xer@multiphasicapps.net>
// ---------------------------------------------------------------------------
// SquirrelJME is under the Mozilla Public License Version 2.0.
// See license.mkd for licensing and copyright information.
// ---------------------------------------------------------------------------

package net.multiphasicapps.jsr353;

import cc.squirreljme.runtime.cldc.debug.Debugging;
import com.oracle.json.JsonNumber;

/**
 * This represents a single numerical value.
 *
 * @since 2014/08/07
 */
public class ImplValueNumber
    implements JsonNumber
{
    /** Value of the number. */
    private final Number _val;
    
    /**
     * Parses a string to get the number value.
     * 
     * @param __s The string to parse.
     * @throws NullPointerException On null arguments.
     * @since 2022/07/12
     */
    public ImplValueNumber(String __s)
        throws NullPointerException
    {
        this(ImplValueNumber.__parseNumber(__s));
    }
    
    /**
     * Sets the value of this big decimal value.
     *
     * @param __v Value to set.
     * @since 2014/08/07
     */
    public ImplValueNumber(Number __v)
    {
        // Cannot be null
        if (__v == null)
            throw new NullPointerException(
                "No value specified.");
        
        // Set
        this._val = __v;
    }
    
    /**
     * Returns the type of value this is.
     *
     * @return The type of value that this is.
     * @since 2014/08/07
     */
    @Override
    public ValueType getValueType()
    {
        return ValueType.NUMBER;
    }
    
    /**
     * Invokes {@code numberValue().doubleValue()}, information may be
     * lost.
     *
     * @return A {@code double}.
     * @since 2014/08/07
     */
    @Override
    public double doubleValue()
    {
        return this.numberValue().doubleValue();
    }
    
    /**
     * Compares this {@link JsonNumber} with another, returns {@code true} only
     * if the other object is a {@link JsonNumber} and both
     * {@link #numberValue()}s are equal.
     *
     * @return {@code true} if these match.
     * @since 2014/08/07
     */
    @Override
    public boolean equals(Object __o)
    {
        // Numbers only
        if (!(__o instanceof JsonNumber))
            return false;
        
        // Compare multiple values accordingly
        JsonNumber o = (JsonNumber)__o;
        return this.longValue() == o.longValue() &&
            this.doubleValue() == o.doubleValue();
    }
    
    /**
     * Invokes {@code numberValue().hashCode()}.
     *
     * @return The hash code.
     * @since 2014/08/07
     */
    @Override
    public int hashCode()
    {
        return this.numberValue().hashCode();
    }
    
    /**
     * Invokes {@code numberValue().intValue()}, information may be lost.
     *
     * @return An integer value.
     * @since 2014/08/07
     */
    @Override
    public int intValue()
    {
        return this.numberValue().intValue();
    }
    
    /**
     * Invokes {@code numberValue().intValueExact()}.
     *
     * @return An integer value.
     * @throws ArithmeticException If the integer has a fraction or does not
     * fit within an int.
     * @since 2014/08/07
     */
    @Override
    public int intValueExact()
    {
        long val = this.longValueExact();
        
        if (val < Integer.MIN_VALUE || val > Integer.MAX_VALUE)
            throw new ArithmeticException("ARIT");
        
        return (int)val;
    }
    
    /**
     * Checks whether the specified value is an integer,
     * {@code numberValue().scale()} is used and if the scale is zero it is
     * considered an integer.
     *
     * @return {@code true} if this is an integer.
     * @since 2014/08/07
     */
    @Override
    public boolean isIntegral()
    {
        throw Debugging.todo();
    }
    
    /**
     * {@inheritDoc}
     * @since 2022/07/12
     */
    @Override
    public Number numberValue()
    {
        return this._val;
    }
    
    /**
     * Invokes {@code numberValue().longValue()}, information may be lost.
     *
     * @return The long value.
     * @since 2014/08/07
     */
    @Override
    public long longValue()
    {
        return this.numberValue().longValue();
    }
    
    /**
     * Invokes {@code numberValue().longValueExact()}.
     *
     * @return A long value.
     * @throws ArithmeticException If the integer has a fraction or does not
     * fit within a long.
     * @since 2014/08/07
     */
    @Override
    public long longValueExact()
    {
        throw Debugging.todo();
    }
    
    /**
     * Invokes {@code numberValue().toString()}.
     *
     * @return The value as a string.
     * @since 2014/08/07
     */
    @Override
    public String toString()
    {
        return this.numberValue().toString();
    }
    
    /**
     * Attempts to parse the given number.
     * 
     * @param __s The string to parse.
     * @return The parsed number.
     * @throws NullPointerException On null arguments.
     * @throws NumberFormatException If the number is not correct.
     * @since 2022/07/12
     */
    static Number __parseNumber(String __s)
        throws NullPointerException, NumberFormatException
    {
        if (__s == null)
            throw new NullPointerException("NARG");
        
        try
        {
            return Long.parseLong(__s, 10);
        }
        catch (NumberFormatException ignored)
        {
            return Double.parseDouble(__s);
        }
    }
}