Byte is a list or an array? CTl2

golomeen

• May 21, 2014 00:00

• Answered

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function string shadeColor(string color, integer idx)
{
string res;
res = replace(color,"#","");
byte b = hex2byte(res);
for (integer i=0;i<length(b);i++)
{
b[i] = bitOr(b[i], bitLShift(1, idx)); //Error: expression is not a composite type but is resolved to byte
}
res = "#" + byte2hex(b);
return res;
}

i can't catch the concept of byte type, help me

• 

  dpavlis

  • May 21, 2014 15:49

  0

  Comment actions Permalink

  Unfortunately, as of Clover version 3.5 the byte data type does not allow to access individual byte values in the array using index:
  

  b[i] = 1; //this is not valid

  
  We will fix this issue in the future version, but for now, following two options are available for you:
  
  

  
  
  • use Reformat component and code the reformat function in Java - see Reformat - Java interface
  
  
  • create custom CTL function which will do it for you - see How-to create custom CTL function

  
  
  
  Custom Java transformation example:
  

  
  import org.jetel.component.DataRecordTransform;
  import org.jetel.data.DataRecord;
  import org.jetel.exception.ComponentNotReadyException;
  import org.jetel.exception.TransformException;
  
  public class ColorTrans extends DataRecordTransform {
  
  	@Override
  	public boolean init() throws ComponentNotReadyException {
  		return super.init();
  	}
  
  	@Override
  	public int transform(DataRecord[] arg0, DataRecord[] arg1)
  			throws TransformException {
  
  		byte[] bytearray;
  		
  		// get source value
  		String value=arg0[0].getField("myfieldStr").toString();
  		
  		// do some manipulation
  		bytearray = value.getBytes();
  		
  		//set result to output
  		arg1[0].getField("myoutputBye").setValue(bytearray);
  		
  		return OK; //next record
  	}
  
  }
  

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