Bug 138562 Splite extendsexcpetion to seperate sub class
The suggestion is Parent invalid Cycle extends Different type extends Not top level extends
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/DesignElement.java
}
	/**
	 * Checks all value items in the specific property whose type is list
	 * property type. This method is used in command. If any error is found, the
	 * exception will be thrown.
	 * 
	 * @param module
	 *            the module
	 * @param propDefn
	 *            the property definition of the list property
	 * @param list
	 *            the value list to check
	 * @param toAdd
	 *            the value item to add. This parameter maybe is
	 *            <code>null</code>.
	 * @throws PropertyValueException
	 *             if the structure list or the item to add has any semantic
	 *             error..
	 */
	public void checkSimpleList( Module module, PropertyDefn propDefn,
			List list, Object toAdd ) throws PropertyValueException
	{
		List errorList = SimpleListValidator.getInstance( ).validateForAdding(
				getHandle( module ), propDefn, list, toAdd );
		if ( errorList.size( ) > 0 )
		{
			throw (PropertyValueException) errorList.get( 0 );
		}
	}
}