[WICKET-6707] Property setter parameter type is assumed to be equal to getter return type

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 8.6.1
• Fix Version/s: 8.7.0, 9.0.0-M4, 7.16.0
• Component/s: wicket-core
• Assignee: Martin Tzvetanov Grigorov
• Reporter: David Rain
• Created: 03/Oct/19 06:35
• Updated: 15/Oct/19 09:32
• Resolved: 10/Oct/19 10:45

Description

I am getting error: Method [public boolean cz.kb.dcs.module_transaction.api.data_objects.cexi.TransactionFormItem.isInstantPayment()]. Can't convert null value to a primitive class: boolean

This is due to

if (setMethod != null) {
    // getMethod is always there and if the value will be set through a setMethod then
    // the getMethod return type will be its type. Else we have to look at the
    // parameters if the setter but getting the return type is quicker
    type = getMethod.getReturnType();
}

I have this getter and setter:

public boolean isInstantPayment() {
    return instantPayment == null ? false : instantPayment.booleanValue();
}

public void setInstantPayment(final Boolean instantPayment) {
    this.instantPayment = instantPayment;
}

So setting NULL would be possible (the property itself is object Boolean). Although it is not according to Java Beans specification.