Bug 121111 Bad event handler class name does not cause an error
Open a report design, open any Data Set's Property editor. Type in an invalid Java class name for the "Event Handler Class" property, say "aaa". Preview a report that uses that Data Set. The report executes normally. No error is shown. Event handlers are an integral part of a report design, and if a script handler class is not found, or if the handler throws a runtime exception, Report Engine should either stop the report execution, or show the error message in the generated report. (Tested with the 2005-12-15 nightly build)
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/api/impl/GetParameterDefinitionTask.java
* 
	 * @param value
	 *            value string
	 * @param valueType
	 *            value type
	 * @return object with the specified value
	 */
	private Object getStringValue( String value, String valueType )
	{
		try
		{
			if ( DesignChoiceConstants.PARAM_TYPE_BOOLEAN.equals( valueType ) )
				return DataTypeUtil.toBoolean( value );
			if ( DesignChoiceConstants.PARAM_TYPE_DATETIME.equals( valueType ) )
				return DataTypeUtil.toDate( value );
			if ( DesignChoiceConstants.PARAM_TYPE_DECIMAL.equals( valueType ) )
				return DataTypeUtil.toBigDecimal( value );
			if ( DesignChoiceConstants.PARAM_TYPE_FLOAT.equals( valueType ) )
				return DataTypeUtil.toDouble( value );
		} catch ( BirtException e )
		{
			log.log( Level.SEVERE, e.getLocalizedMessage( ), e );
		}
		return value;
	}
	/**
	 * get selection choices from the data set.
	 * 
	 * @param dataSetName
	 *            data set name