Name: dk106046 Date: 08/03/2004

Customer's application receives an servlet exception, such as,
Servlet Error-[No getter method for property cardHolders of bean customerForm]:
javax.servlet.jsp.JspException: No getter method for property cardHolders of bean customerForm

The above error is observed when the customer defines the setter/getter method for the property cardHolders of type Collection as a normal property and as also an indexed property as indicated in the following code snippet:
-----code snippet start----

private Collection cardHolders;
....
public java.util.Collection getCardHolders(){
   if (cardHolders == null) setCardHolders(new ArrayList());
   return cardHolders;
}

public void setCardHolders(Collection cardHolders){
   this.cardHolders = cardHolders;
}


public Customer getCardHolders(int i){
   Customer cust = null;

   if (cardHolders == null)
      cust = (Customer)((ArrayList)this.cardHolders).get(i);
   return cust;
}

public void setCardHolders(int i, Customer newCust){
   ((ArrayList)this.cardHolders).set(i, newCust);
}

-----code snippet end----

- Any additional information
This problem is not found with level earlier to 1.3.1_08. This is due
to the fix for Sun bug id 4477877.

Further, Per the Sun beans specification:
----start extract-------------------
Indexed properties
If we find a property whose type is an array “<PropertyElement>[]”, then we also look for methods of the form:

public < PropertyElement> get< PropertyName>(int a);
public void set< PropertyName>(int a, < PropertyElement> b);

If we find either kind of pattern then we assume that “<propertyName>” is an indexed property and that these methods can be used to read and/or write an indexed value. Thus an indexed property “foo” might be represented by four accessor methods:

public Bah[] getFoo();
public void setFoo(Bah a[]);
public Bah getFoo(int a);
public void setFoo(int a, Bah b);
------end extract-------------------

However, we find that the property "cardHolders" is of type Collection which, IMHO, neither this would be considered as a Indexed property (as per the above spec), nor qualifies as a simple property, since there are overloaded setter/getter methods or due to the property type in itself


Alternate Testcase (with List Type)
import java.util.*;
import java.beans.*;

public class PropertyDescriptorTest {
    static class TestBean {
        private List list;
        
        public void setList(List list){
            this.list = list;
        }
        
        public List getList(){
            return list;
        }
        
        public Object getList(int index){
            return list.get(index);
        }
        
        public void setList(int index, Object bean){
            list.set(index, bean);
        }
    }
    
    public static void main(String[] args) throws Exception{
        TestBean testBean = new TestBean();

        BeanInfo beanInfo = Introspector.getBeanInfo(TestBean.class);
        PropertyDescriptor[] descriptors = beanInfo.getPropertyDescriptors();

        for (int i = 0; i < descriptors.length; i++) {
            System.out.println(i);
            System.out.println(descriptors[i].getName());
            System.out.println(descriptors[i].getPropertyType());
            System.out.println(descriptors[i].getReadMethod());
            System.out.println(descriptors[i].getWriteMethod());
            System.out.println();
        }
    }
}

======================================================================