package com.temp.common.shared.utils;

public class Validate {
    public static void notNull( String what, Object toCheck ) {
        if ( toCheck == null ) {
            throw new IllegalArgumentException( what + " Not Allowed to be Null" );
        }
    }

    public static String noEmpty( String what, String toCheck ) {
        toCheck = StringUtils.noEmpty( toCheck );
        if ( toCheck == null ) {
            throw new IllegalArgumentException( what + " Not Allowed to be Null or Empty" );
        }
        return toCheck;
    }

    public static String noEmptyIdentifier( String what, String toCheck ) {
        toCheck = noEmpty( what, toCheck );
        if ( toCheck != null ) {
            int errorIndex = StringUtils.checkIdentifier( toCheck );
            if ( errorIndex == 0 ) {
                throw new IllegalArgumentException( "First Character Unacceptable for an Identifier: '" + toCheck + "'" );
            }
            if ( errorIndex != -1 ) {
                throw new IllegalArgumentException(
                        "Character (" + (errorIndex + 1) + ":'" + toCheck.charAt( errorIndex ) + "') Unacceptable for an Identifier: '" + toCheck + "'" );
            }
        }
        return toCheck;
    }

    public static Integer optionalLength( String what, Integer length ) {
        if ( length != null ) {
            length( what, length );
        }
        return length;
    }

    public static int length( String what, int length ) {
        if ( length < 1 ) {
            throw new IllegalArgumentException( what + " Must be at least 1" );
        }
        return length;
    }
}