/**
* Get a non-modal boolean property value. Throws an exception if no property value exists or an
* error occurs.
*
* @param ph The property holder from which to retrieve the property value.
* @param pd The property to retrieve.
* @return The boolean value of the property.
* @throws InvalidModelException Thrown if the property value cannot be retrieved because the
* model is incomplete or otherwise invalid.
* @throws PropertyNotPresentException Thrown if the property is undefined for ph.
* @throws PropertyIsModalException Thrown if ph is modal and declarative.
* @throws IllegalStateException Thrown if the lookup encounters a cycle of property reference
* dependencies.
* @throws IllegalArgumentException Thrown if ph or pd is null.
* @throws PropertyDoesNotApplyToHolderException Thrown if pd does not apply to ph.
* @throws PropertyIsListException Thrown if the property is not scalar.
* @throws ClassCastException Thrown if the retrieved value is not a {@link TrueFalseValue} value.
*/
public static boolean getBooleanValue(final NamedElement ph, final Property pd)
throws InvalidModelException, PropertyNotPresentException, PropertyIsModalException,
IllegalStateException, IllegalArgumentException, PropertyDoesNotApplyToHolderException,
PropertyIsListException, ClassCastException {
final BooleanLiteral pv = (BooleanLiteral) getSimplePropertyValue(ph, pd);
return pv.isValue();
}
