Bug 141709 The Interface "IScalarParameterModel" should provide a "TEXT_ID_PROP" member.
In order to provide the "Localization" function in Property Editor of Parameter, it requires to implement a "ScalarParameterI18nPage" Class similar to the Class of "LabelI18nPage", and it consequently needs to "IScalarParameterModel" provide a "TEXT_ID_PROP" member for "ScalarParameterHandle" Class.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ScalarParameterHandle.java
* </ul>
	 * 
	 * @return the control type for the UI to display the parameter
	 * 
	 * @see org.eclipse.birt.report.model.api.elements.DesignChoiceConstants
	 */
	public String getControlType( )
	{
		return getStringProperty( ScalarParameter.CONTROL_TYPE_PROP );
	}
	/**
	 * Sets the control type for this parameter. Control types are one of
	 * constants defined in <code>DesignChoiceConstants</code>:
	 * 
	 * <ul>
	 * <li><code>PARAM_CONTROL_TEXT_BOX</code>
	 * <li><code>PARAM_CONTROL_LIST_BOX</code>
	 * <li><code>PARAM_CONTROL_COMBOBOX</code>
	 * <li><code>PARAM_CONTROL_RADIO_BUTTON</code>
	 * <li><code>PARAM_CONTROL_CHECK_BOX</code>
	 * </ul>
	 * 
	 * @param controlType
	 *            the control type for the UI to display the parameter
	 * 
	 * @throws SemanticException
	 *             if the input type is not one of above choices.
	 * @see #getDataType()
	 * @see org.eclipse.birt.report.model.api.elements.DesignChoiceConstants
	 */