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

public abstract class EqualSupport
{
    public EqualSupport()
    {
    }

    public static boolean equal( Object pThis, Object pThat )
    {
        if ( pThis == pThat ) // Same or both null
        {
            return true;
        }
        // Both CAN'T be null
        return (pThis != null) ? pThis.equals( pThat ) : pThat.equals( pThis );
    }

    public static boolean equal( boolean pThis, boolean pThat )
    {
        return (pThis == pThat);
    }

    public static boolean equal( int pThis, int pThat )
    {
        return (pThis == pThat);
    }

    public static boolean equal( long pThis, long pThat )
    {
        return (pThis == pThat);
    }

    public static boolean equal( float pThis, float pThat )
    {
        return (pThis == pThat);
    }

    public static boolean equal( double pThis, double pThat )
    {
        return (pThis == pThat);
    }

    public static boolean equal( Object[] pThis, Object[] pThat )
    {
        if ( pThis == pThat ) // Same or both null
        {
            return true;
        }
        if ( (pThis != null) && (pThat != null) && (pThis.length == pThat.length) )
        {
            for ( int i = 0; i < pThis.length; i++ )
            {
                if ( !equal( pThis[i], pThat[i] ) )
                {
                    return false;
                }
            }
            return true;
        }
        return false;
    }

    public static int calcHashCode( Object pObject )
    {
        return (pObject == null) ? 0 : pObject.hashCode();
    }

    public static int calcHashCode( boolean pBool )
    {
        return Boolean.valueOf( pBool ).hashCode();
    }

    public static int calcHashCode( int pInt )
    {
        return pInt; // 'lifted' from Integer
    }

    public static int calcHashCode( long pLong )
    {
        return (int) (pLong ^ (pLong >>> 32)); // 'lifted' from Long
    }

    public static int hashCodeEm( int pHashCode1, int pHashCode2 )
    {
        return (pHashCode1 * 31) + pHashCode2;
    }

    public static int hashCodeEm( int pHashCode1, int pHashCode2, int pHashCode3 )
    {
        return hashCodeEm( hashCodeEm( pHashCode1, pHashCode2 ), pHashCode3 );
    }

    public static int hashCodeEm( int pHashCode1, int pHashCode2, int pHashCode3, int pHashCode4 )
    {
        return hashCodeEm( hashCodeEm( pHashCode1, pHashCode2, pHashCode3 ), pHashCode4 );
    }

    public static int hashCodeEm( int pHashCode1, int pHashCode2, int pHashCode3, int pHashCode4, int pHashCode5 )
    {
        return hashCodeEm( hashCodeEm( pHashCode1, pHashCode2, pHashCode3, pHashCode4 ), pHashCode5 );
    }
}