/**
* Implements the CFML Function listsetat
*/
package railo.runtime.functions.list;
import railo.runtime.PageContext;
import railo.runtime.exp.ExpressionException;
import railo.runtime.exp.FunctionException;
import railo.runtime.ext.function.Function;
import railo.runtime.type.Array;
import railo.runtime.type.util.ListUtil;
public final class ListSetAt implements Function {
private static final long serialVersionUID = -105782799713547552L;
public static String call(PageContext pc , String list, double posNumber, String value) throws ExpressionException {
return call(pc,list,posNumber,value,",",false);
}
public static String call(PageContext pc , String list, double posNumber, String value, String delimiter) throws ExpressionException {
return call(pc,list,posNumber,value,delimiter,false);
}
public static String call(PageContext pc , String list, double posNumber, String value, String delimiter, boolean includeEmptyFields) throws ExpressionException {
if(list.length()==0)
throw new FunctionException(pc,"listSetAt",1,"list","can't be empty");
int pos=((int) posNumber);
//int[] removedInfo=new int[2];
Array arr = ListUtil.listToArray(list,delimiter);
int len=arr.size();
// invalid index
if(pos<1)
throw new FunctionException(pc,"listSetAt",2,"position","invalid string list index ["+(pos)+"]");
else if(len<pos) {
throw new FunctionException(pc,"listSetAt",2,"position","invalid string list index ["+(pos)+"], indexes go from 1 to "+(len));
}
StringBuffer sb=new StringBuffer();//RepeatString.call(new StringBuffer(),delimiter,removedInfo[0]);
boolean hasStart=false;
boolean hasSet=false;
String v;
int count=0;
for(int i=1;i<=len;i++) {
v=(String)arr.get(i,"");
if(hasStart) {
sb.append(delimiter);
}
else hasStart=true;
if(includeEmptyFields || v.length()>0)count++;
if(!hasSet && pos==count) {
sb.append(value);
hasSet=true;
}
else sb.append(arr.get(i,""));
}
if(!hasSet){
throw new FunctionException(pc,"listSetAt",2,"position","invalid string list index ["+(pos)+"]");
}
return sb.toString();
}
}