001    /**
002     * Implements the CFML Function repeatstring
003     */
004    package railo.runtime.functions.string;
005    
006    import railo.commons.lang.StringUtil;
007    import railo.runtime.PageContext;
008    import railo.runtime.exp.ExpressionException;
009    import railo.runtime.ext.function.Function;
010    import railo.runtime.op.Caster;
011    
012    public final class RepeatString implements Function {
013        public static String call(PageContext pc , String str, double count) throws ExpressionException {
014            if(count<0) throw new ExpressionException("Parameter 2 of function repeatString which is now ["+Caster.toString(count)+"] must be a non-negative integer");
015            return StringUtil.repeatString(str,(int)count);
016        }
017        public static String _call(PageContext pc , String str, double count) throws ExpressionException {
018            int len=(int) count;
019            if(len<0) throw new ExpressionException("Parameter 2 of function repeatString which is now ["+len+"] must be a non-negative integer");
020            char[] chars=str.toCharArray();
021            StringBuffer cb=new StringBuffer(chars.length*len);
022            for(int i=0;i<len;i++)cb.append(chars);
023            return cb.toString();
024        }
025        public static StringBuffer call(StringBuffer sb,String str, double count) throws ExpressionException {
026            int len=(int) count;
027            if(len<0) throw new ExpressionException("Parameter 1 of function repeatString which is now ["+len+"] must be a non-negative integer");
028            
029            for(int i=0;i<len;i++)sb.append(str);
030            return sb;
031        }
032        public static StringBuffer call(StringBuffer sb,char c, double count) throws ExpressionException {
033            int len=(int) count;
034            if(len<0) throw new ExpressionException("Parameter 1 of function repeatString which is now ["+len+"] must be a non-negative integer");
035            
036            for(int i=0;i<len;i++)sb.append(c);
037            return sb;
038        }
039    }