Changeset 94 for trunk/EventBenchCore/src/de/ugoe/cs/eventbench/models

Timestamp:

07/04/11 10:56:31 (13 years ago)

Author:

sherbold

Message:

+ added de.ugoe.cs.eventbench.models.generateValidSequences() to IStochasticProcess

Location:

trunk/EventBenchCore/src/de/ugoe/cs/eventbench/models

Files:

• IStochasticProcess.java (modified) (1 diff)
• TrieBasedModel.java (modified) (2 diffs)

trunk/EventBenchCore/src/de/ugoe/cs/eventbench/models/IStochasticProcess.java

@@ -15 +15 @@
         public Set<List<? extends Event<?>>> generateSequences(int length);
         
+        public Set<List<? extends Event<?>>> generateSequences(int length, boolean fromStart);
+        
+        public Set<List<? extends Event<?>>> generateValidSequences(int length);
+        
         public int getNumStates();
         

trunk/EventBenchCore/src/de/ugoe/cs/eventbench/models/TrieBasedModel.java

@@ -112 +112 @@
         
         public Set<List<? extends Event<?>>> generateSequences(int length) {
-                Set<List<? extends Event<?>>> sequenceSet = new LinkedHashSet<List<? extends Event<?>>>();;
+                return generateSequences(length, false);
+                /*Set<List<? extends Event<?>>> sequenceSet = new LinkedHashSet<List<? extends Event<?>>>();;
                 if( length<1 ) {
                         throw new InvalidParameterException("Length of generated subsequences must be at least 1.");
@@ -137 +138 @@
                 }
                 return sequenceSet;
+                */
+        }
+        
+        // if startValid, all sequences will start in Event.STARTEVENT
+        public Set<List<? extends Event<?>>> generateSequences(int length, boolean fromStart) {
+                Set<List<? extends Event<?>>> sequenceSet = new LinkedHashSet<List<? extends Event<?>>>();;
+                if( length<1 ) {
+                        throw new InvalidParameterException("Length of generated subsequences must be at least 1.");
+                }
+                if( length==1 ) {
+                        if( fromStart ) {
+                                List<Event<?>> subSeq = new LinkedList<Event<?>>();
+                                subSeq.add(Event.STARTEVENT);
+                        } else {
+                                for( Event<?> event : getEvents() ) {
+                                        List<Event<?>> subSeq = new LinkedList<Event<?>>();
+                                        subSeq.add(event);
+                                        sequenceSet.add(subSeq);
+                                }
+                        }
+                        return sequenceSet;
+                }
+                Set<? extends Event<?>> events = getEvents();
+                Set<List<? extends Event<?>>> seqsShorter = generateSequences(length-1);
+                for( Event<?> event : events ) {
+                        for( List<? extends Event<?>> seqShorter : seqsShorter ) {
+                                Event<?> lastEvent = event;
+                                if( getProbability(seqShorter, lastEvent)>0.0 ) {
+                                        List<Event<?>> subSeq = new ArrayList<Event<?>>(seqShorter);
+                                        subSeq.add(lastEvent);
+                                        sequenceSet.add(subSeq);
+                                }
+                        }
+                }
+                return sequenceSet;
+        }
+        
+        // sequences from start to end
+        public Set<List<? extends Event<?>>> generateValidSequences(int length) {
+                // check for min-length implicitly done by generateSequences
+                Set<List<? extends Event<?>>> validSequences = generateSequences(length, true);
+                for( List<? extends Event<?>> sequence : validSequences ) {
+                        if( sequence.size()!=length ) {
+                                validSequences.remove(sequence);
+                        } else {
+                                if( !Event.ENDEVENT.equals(sequence.get(sequence.size()-1)) ) {
+                                        validSequences.remove(sequence);
+                                }
+                        }
+                }
+                return validSequences;
         }