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JSR-000344: JavaServer(TM) Faces 2.2 API
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package javax.faces.component;


/**
 * Base class for classes that wrap a MethodBinding and
 * implement a faces listener-like interface.
 *
 */ 

abstract class MethodBindingAdapterBase extends Object {
    
    /**
     * Recursively interrogate the cause property of the
     * argument exception and stop recursing either when it
     * is an instance of expectedExceptionClass or
     * null.  Return the result.
     */

    Throwable getExpectedCause(Class expectedExceptionClass, 
			       Throwable exception) {
	Throwable result = exception.getCause();
	if (null != result) {
	    if (!expectedExceptionClass.isAssignableFrom(result.getClass())) {
		result = getExpectedCause(expectedExceptionClass, result);
	    }
	}
	return result;
    }
    
}