Initializing references to objects is always a good idea to avoid NPE.
-W
On 10/03/2014, Sandhya Sree <sandhyachinna...@gmail.com> wrote:
> im getting the following error on doing that
>
> Exception in thread "pool-2-thread-1" Exception executing consequence for
> rule "size" in com.net: java.lang.NullPointerException
>
> what might be the problem?
>
>
>
> On Mon, Mar 10, 2014 at 4:16 PM, Wolfgang Laun
> <wolfgang.l...@gmail.com>wrote:
>
>> Seeing that the list is static you can use the usual way for accessing
>> a static class member:
>>
>> Event.listOfEvent.add( ... );
>>
>> @Mauricio: It's not unusual to maintain a static collection (even
>> though there may be better ways, esp. with Drools).
>>
>>
>>
>> On 10/03/2014, Mauricio Salatino <sala...@gmail.com> wrote:
>> > Can you please elaborate about why do you want to do that? what's the
>> point
>> > of having a list inside of the Event class that will contain the same
>> > event?
>> >
>> > The "Then" side of the rule is pure java.. so you just do
>> > event.getEvents().add(event);
>> >
>> > but I don't see the point of doing that.
>> >
>> > Regards
>> >
>> >
>> > On Mon, Mar 10, 2014 at 10:31 AM, Sandhya Sree
>> > <sandhyachinna...@gmail.com>wrote:
>> >
>> >> hi ,
>> >>
>> >> i have a class called Event which is as follows:
>> >>
>> >> public class Event {
>> >> private String name;
>> >> private File source;
>> >> private Date timeStamp;
>> >> public static List<Event> listOfEvents;
>> >>
>> >> public Event(String name, File source, Date timeStamp) {
>> >> this.name = name;
>> >> this.source = source;
>> >> this.timeStamp = timeStamp;
>> >> }
>> >> public String getName() {
>> >> return name;
>> >> }
>> >> public void setName(String name) {
>> >> this.name = name;
>> >> }
>> >> public File getSource() {
>> >> return source;
>> >> }
>> >> public void setSource(File source) {
>> >> this.source = source;
>> >> }
>> >> public Date getTimeStamp() {
>> >> return timeStamp;
>> >> }
>> >> public void setTimeStamp(Date timeStamp) {
>> >> this.timeStamp = timeStamp;
>> >> }
>> >>
>> >>
>> >> public void display()
>> >> {
>> >> System.out.println(name +" " + "in folder: " + source + " on " +
>> >> timeStamp );
>> >> }
>> >>
>> >>
>> >>
>> >> there are also some other classes associated with my project.. i have
>> >> a
>> >> rules file which computes the size of a folder and creates an object
>> >> of
>> >> Event class. every time this object of Event class is created i wwant
>> >> to
>> >> put it in a List<Event>.. how can i do this..
>> >>
>> >> my rules is as follows:
>> >>
>> >> rule "size"
>> >> when
>> >> $p: RuleContext($size: getOldContext().getParent().getUsableSpace()
>> >> >
>> >> (30*1024*1024))
>> >>
>> >> then
>> >> Event event = new Event("folder almost full",
>> >> $p.getOldContext().getParent(), new Date());
>> >> event.display();
>> >> ......here i want to put this event into the List<Event> declared
>> >> in
>> >> Event Class.....
>> >>
>> >> end
>> >>
>> >>
>> >>
>> >> thanks,
>> >> Sandhya
>> >>
>> >> _______________________________________________
>> >> rules-users mailing list
>> >> rules-users@lists.jboss.org
>> >> https://lists.jboss.org/mailman/listinfo/rules-users
>> >>
>> >
>> >
>> >
>> > --
>> > - MyJourney @ http://salaboy.com <http://salaboy.wordpress.com>
>> > - Co-Founder @ http://www.jugargentina.org
>> > - Co-Founder @ http://www.jbug.com.ar
>> >
>> > - Salatino "Salaboy" Mauricio -
>> >
>> _______________________________________________
>> rules-users mailing list
>> rules-users@lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/rules-users
>>
>
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