Bug 179743 Parameter Validate Event is not Called
I have tested the validate event on parameters and it never appears to get called.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/api/impl/EngineTask.java
}
		else if ( DesignChoiceConstants.PARAM_TYPE_DATETIME.equals( type ) )
		{
			if ( paramValue instanceof Date )
				return true;
			log
					.log(
							Level.SEVERE,
							"The supplied value {0} for parameter {1} is not a valid date time.", new String[]{paramValue.toString( ), paramName} ); 
			return false;
		}
		else if ( DesignChoiceConstants.PARAM_TYPE_DATE.equals( type ) )
		{
			if ( paramValue instanceof java.sql.Date )
				return true;
			log
					.log(
							Level.SEVERE,
							"The supplied value {0} for parameter {1} is not a valid date.", new String[]{paramValue.toString( ), paramName} ); 
			return false;
		}
		else if ( DesignChoiceConstants.PARAM_TYPE_TIME.equals( type ) )
		{
			if ( paramValue instanceof java.sql.Time )
				return true;
			log
					.log(
							Level.SEVERE,
							"The supplied value {0} for parameter {1} is not a valid time.", new String[]{paramValue.toString( ), paramName} ); 
			return false;