"from" will iterate for you, exactly like "accumulate" counted the events. If you need more details, please consult the documentation
On 03/10/2014 07:29 PM, Sandhya Sree wrote: > The problem here is even if multiple files are added, there is only > one event object created. i want to have like say if 3 new files are > added, 3 event objects must be created, and all three event objects > must be added to List<Event> listOfEvents. > > > Thanks. > > > On Mon, Mar 10, 2014 at 11:48 PM, Davide Sottara <dso...@gmail.com > <mailto:dso...@gmail.com>> wrote: > > The "accumulates" should not be in the "then" part of a rule (see > my previous email). > That rule gave you two lists, in the variables $plus and $mins, > that you can use in the consequence. > > If you need to process each file separately, you may want to do > something like this: > > rule "new file" > when > FileData($old : fileOld, $new : fileNew, fileOld != fileNew) > $newFile : String( this not memberOf $old ) from $new > then > // create new event for a new file : new Event(...) > // add to list : Event.listOfEvents.add(...) > end > > You'll need another rule for the files that have been removed. > > Notice that your Event class has no way to distinguish "added" > from "removed" files, you may want to > add a boolean or something there. > Best > Davide > > > On 03/10/2014 07:04 PM, Sandhya Sree wrote: >> hi, >> im new to drools..im trying to create a project as follows. i >> have a class called Monitor which monitors a folder and creates >> two lists called fileOld( which is the list of filenames in that >> folder at time t1) and fileNew(which is the list of filenames in >> that folder at time t2). i have another class called FileData >> which contains two members fileOld and fileNew (list of strings) >> with getters,setters and constructor. fileOld and fileNew from >> Monitor Class are passed to FileData class. >> >> i also have another class called Event which is as follows: >> public class Event { >> public static String name; >> private File source; >> private Date timeStamp; >> public static List<Event> listOfEvents = new >> ArrayList<Event>(); >> >> public Event(String name, File source, Date timeStamp) { >> this.name <http://this.name> = name; >> this.source = source; >> this.timeStamp = timeStamp; >> } >> public String getName() { >> return name; >> } >> public void setName(String name) { >> this.name <http://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; >> } >> >> now i have to compare these two lists(fileOld and fileNew) in a >> rule file and if they are not equal i have to create an event >> object for every file added and deleted and put it in the >> List<Event> listOfEvents. >> >> here is my rule file: >> >> rrule "files are equal" >> when >> FileData( fileOld == fileNew) >> then >> System.out.println("files are equal"); >> end >> >> >> rule "files not equal" >> when >> FileData($old : fileOld, $new : fileNew, fileOld != fileNew) >> >> then >> accumulate( $s : String( this not memberOf $old ) from $new, >> $plus : collectList( $s ) ) >> accumulate( $t : String( this not memberOf $new ) from $old, >> $mins : collectList( $t ) ) >> System.out.println("files added:" + $plus ); >> System.out.println( "files deleted:" + $mins ); >> end >> >> >> >> how can i loop through each of the file added or deleted and >> create an Event Class object for every file added and deleted >> and finally add all the created objects to List<Event> >> listOfEvents.. >> >> >> Thanks. >> >> >> _______________________________________________ >> rules-users mailing list >> rules-users@lists.jboss.org <mailto:rules-users@lists.jboss.org> >> https://lists.jboss.org/mailman/listinfo/rules-users > > > _______________________________________________ > rules-users mailing list > rules-users@lists.jboss.org <mailto:rules-users@lists.jboss.org> > https://lists.jboss.org/mailman/listinfo/rules-users > > > > > _______________________________________________ > rules-users mailing list > rules-users@lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users
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