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
executionContext.registerBean( jsName, obj );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.engine.api2.IEngineTask#getID()
	 */
	public int getID( )
	{
		return taskID;
	}
	protected Object convertToType( Object value, String type )
	{
		try
		{
			if ( DesignChoiceConstants.PARAM_TYPE_BOOLEAN.equals( type ) )
			{
				return DataTypeUtil.toBoolean( value );
			}
			else if ( DesignChoiceConstants.PARAM_TYPE_DATETIME.equals( type ) )
			{
				return DataTypeUtil.toDate( value );
			}
			else if ( DesignChoiceConstants.PARAM_TYPE_DATE.equals( type ) )
			{
				return DataTypeUtil.toSqlDate( value );
			}
			else if ( DesignChoiceConstants.PARAM_TYPE_TIME.equals( type ) )
			{
				return DataTypeUtil.toSqlTime( value );