References to java methods from JSNI must always refer to the class signatures of the defining base class, not the inheriting child class. Compile-time- OR Runtime-Exceptions can occur.
Example: Take the following abstract class...
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package org.clazzes.example;
abstract class Parent {
public void parentMethod() {
//Do something...
}
}
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which is extended as follows (factory method added for clarity):
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package org.clazzes.example;
class Child extends Parent {
public static Child getInstance() {
return new Child();
}
}
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To use parentMethod() from an instance of Child, you must use the following:
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public native final void callParentMethodFromJSNI() /*-{
var child = @org.clazzes.example.Child::newInstance()();
//access to parentMethod() only works like this:
child.@org.clazzes.example.Parent::parentMethod()();
}-*/;
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