Reflection - How to determine the method parameter class

[bazong]

Hi,

I need to write a String value into set method with different parameter objects. For this i need to know the parameter class.
e.g.:

MyClass.setFoo(myValue)

My Question is, if myValue is a String or a BigInteger class?

I tried following code example, but didn't get the decided result ...

Method m = iRecord.getClass().getDeclaredMethods()[j];
Class params[] = m.getParameterTypes();
if(params.length == 1){
  if(params[0] instanceof String){
    System.out.println("String recogniZed");
  }
  if(params[0] instanceof BigInteger){
    System.out.println("BigInteger recogniZed");
  }
}

Any suggestions to this?

thx in advance
Michael

[j2me64]

it sounds you need to overload your method setFoo, example

public void setFoo(String s) {}
public void setFoo(int i) {}
and so on

when you now call setFoo("myString") then the method with the string parameter will be called. more on this topi here

[RamyaSivakanth]

please give the complete code...not understandable

[bazong]

My problem is, the MyClass in my example is a auto-generated JAXB class which i won't change and i'm trying to create a generic method to fill in different JAXB classes. Theses classes have exactly one set method according to an XML element. So i need to now the arguments type.

[bazong]

here my complete code:

public DTSalesTurnover setIFRecord(String filename) throws InvalidContentException {
		// record field information
		int idx = 0;
		public Vector<DataField> record = new Vector<DataField>();
		record.add(new DataField(COMPANY_CODE_QUALIFIER, "", idx++, 6));
		record.add(new DataField(PERIOD_DATE_QUALIFIER, "", idx++, 6));
		// XML record element
		DTSalesTurnover iRecord = oFactory.createDTSalesTurnover();
		int i = 0;
		try {
			for (; i < record.size(); i++) {
				// loop all record fields
				try {
					for (int j = 0; j < iRecord.getClass().getDeclaredMethods().length; j++) {
						// loop all XML object methods ...
						if (iRecord.getClass().getDeclaredMethods()[j].toString().contains("." + SETTER_PREFIX)) {
							// ... setter
							Method m = iRecord.getClass().getDeclaredMethods()[j];
							if (m.getName().contains(
									SETTER_PREFIX + record.get(i).name.substring(0, 1).toUpperCase() + record.get(i).name.substring(1))) {
								System.out.println("--> " + m.getName());
							
//-------------------------------------------------------------------------------------
// Here i'd like to determine the class type of the set method
// all my field values are in a String format ....

								Object iParams[] = new Object[1];
								if ( m.getParameterTypes()[0].getClass().isInstance(BigInteger.class) ) {
									iParams[0] = new BigInteger(record.get(i).value);
								}
								else if (m.getParameterTypes()[0].getClass().isInstance(Float.class)){
									iParams[0] = new Float(record.get(i).value);
								}
								else if (m.getParameterTypes()[0].getClass().isInstance(String.class)){
									iParams[0] = record.get(i).value;
								}
								else{
									System.out.println("???\t"+record.get(i).value);
								}
								iRecord.getClass().getMethod(m.getName(), params).invoke(m, iParams);

//-------------------------------------------------------------------------------------
							}
						}
					}// for
				} catch (IllegalArgumentException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				} catch (SecurityException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				} catch (IllegalAccessException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				} catch (InvocationTargetException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				} catch (NoSuchMethodException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}// for
		} catch (NumberFormatException e) {
			throw new InvalidContentException(e.getClass().getSimpleName() + ": Element <" + record.get(i).name + ">" + e.getMessage());
		}
		return iRecord;
	}