// This Source Code is in the Public Domain per: http://unlicense.org
package org.litesoft.core.simpletypes.nonpublic;

public abstract class CompareSupport<T> extends EqualSupport implements Comparable<T>
{
    public static final int EQUAL = 0;
    public static final int GREATER = 1;
    public static final int LESSER = -1;

    public CompareSupport()
    {
    }

    public static boolean lessThan( Comparable pThis, Comparable pThem )
    {
        return lessThan( compare( pThis, pThem ) );
    }

    public static boolean greaterThan( Comparable pThis, Comparable pThem )
    {
        return greaterThan( compare( pThis, pThem ) );
    }

    public static boolean lessThan( int pCompareResult )
    {
        return (pCompareResult < 0);
    }

    public static boolean greaterThan( int pCompareResult )
    {
        return (pCompareResult > 0);
    }

    /**
     * @return 1, 0, -1 as pThis > pThem, pThis == pThem, pThis < pThem
     */
    public static int compare( int pThis, int pThem )
    {
        return (pThis == pThem) ? 0 : (pThis > pThem) ? 1 : -1;
    }

    /**
     * @return 1, 0, -1 as pThis > pThem, pThis == pThem, pThis < pThem
     */
    public static int compare( long pThis, long pThem )
    {
        return (pThis == pThem) ? 0 : (pThis > pThem) ? 1 : -1;
    }

    /**
     * @return 1, 0, -1 as pThis & !pThem, pThis == pThem, !pThis & pThem
     */
    public static int compare( boolean pThis, boolean pThem )
    {
        return (pThis == pThem) ? 0 : pThis ? 1 : -1;
    }

    /**
     * @return >0, 0, <0 as pThis > pThem, pThis == pThem, pThis < pThem
     */
    public static int compare( Comparable pThis, Comparable pThem )
    {
        if ( pThis == pThem )
        {
            return 0; // the same (or both null)
        }
        if ( pThis == null ) // null - !null
        {
            return -1;
        }
        if ( pThem == null ) // !null - null
        {
            return 1;
        }
        return LLcompare( pThis, pThem );
    }

    @SuppressWarnings({"unchecked"})
    private static int LLcompare( Comparable pThis, Comparable pThem )
    {
        return pThis.compareTo( pThem );
    }

    public static int compareObjects( Object pThis, Object pThem )
    {
        return compare( toComparable( pThis ), toComparable( pThem ) );
    }

    public static Comparable toComparable( Object pObject )
    {
        return (pObject instanceof Comparable) ? (Comparable) pObject : null;
    }

    public static int compareEm( int pCompare1, int pCompare2 )
    {
        return (pCompare1 != 0) ? //
               pCompare1 : //
               pCompare2;
    }

    public static int compareEm( int pCompare1, int pCompare2, int pCompare3 )
    {
        return (pCompare1 != 0) ? //
               pCompare1 : (pCompare2 != 0) ?  //
                           pCompare2 :  //
                           pCompare3;
    }

    public static int compareEm( int pCompare1, int pCompare2, int pCompare3, int pCompare4 )
    {
        return (pCompare1 != 0) ?  //
               pCompare1 : (pCompare2 != 0) ?  //
                           pCompare2 : (pCompare3 != 0) ?  //
                                       pCompare3 :  //
                                       pCompare4;
    }

    public static int compareEm( int pCompare1, int pCompare2, int pCompare3, int pCompare4, int pCompare5 )
    {
        return (pCompare1 != 0) ?  //
               pCompare1 : (pCompare2 != 0) ?  //
                           pCompare2 : (pCompare3 != 0) ?  //
                                       pCompare3 : (pCompare4 != 0) ?  //
                                                   pCompare4 :  //
                                                   pCompare5;
    }
}