Changeset 99

Timestamp:

07/04/11 13:43:08 (13 years ago)

Author:

sherbold

Message:

• code documentation

File:

• trunk/EventBenchCore/src/de/ugoe/cs/eventbench/models/IStochasticProcess.java (modified) (1 diff)

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

@@ -7 +7 @@
 import de.ugoe.cs.eventbench.data.Event;
 
+/**
+ * <p>
+ * This interface defines the functionalities provided by stochastic processes.
+ * </p>
+ * 
+ * @author Steffen Herbold
+ * @version 1.0
+ */
 public interface IStochasticProcess extends Serializable {
-        
+
+        /**
+         * <p>
+         * Returns the probability, that the next event is {@code symbol} given the
+         * last events are {@code context}. The last element of {@code context} is
+         * the most recent in the history, the first element is the oldest.
+         * </p>
+         * 
+         * @param context
+         *            recently observed symbols
+         * @param symbol
+         *            event for which the probability is calculated
+         * @return probabilty the {@code symbol} is the next event, given the last
+         *         events {@code context}
+         */
         double getProbability(List<? extends Event<?>> context, Event<?> symbol);
 
+        /**
+         * <p>
+         * Generates a random sequence of events. The sequence starts with
+         * {@link Event#STARTEVENT} and finishes with {@link Event#ENDEVENT}.
+         * </p>
+         * 
+         * @return randomly generated sequence
+         */
         public List<? extends Event<?>> randomSequence();
-        
+
+        /**
+         * <p>
+         * Generates all sequences of a given length are possible, i.e., have a
+         * positive probability.<br>
+         * All states are used as possible starting states.
+         * </p>
+         * 
+         * @param length
+         *            length of the generated sequences
+         * @return generated sequences
+         * @see #generateSequences(int, boolean)
+         */
         public Set<List<? extends Event<?>>> generateSequences(int length);
-        
-        public Set<List<? extends Event<?>>> generateSequences(int length, boolean fromStart);
-        
+
+        /**
+         * <p>
+         * Generates all sequences of given length that can are possible, i.e., have
+         * positive probability.<br>
+         * If {@code fromStart==true}, all generated sequences start in
+         * {@link Event#STARTEVENT}. Otherwise this method is the same as
+         * {@link #generateSequences(int)}.
+         * </p>
+         * 
+         * @param length
+         *            length of the generated sequences
+         * @param fromStart
+         *            if true, all generated sequences start with
+         *            {@link Event#STARTEVENT}
+         * @return generated sequences
+         */
+        public Set<List<? extends Event<?>>> generateSequences(int length,
+                        boolean fromStart);
+
+        /**
+         * <p>
+         * Generates all sequences starting with {@link Event#STARTEVENT} and
+         * finishing with {@link Event#ENDEVENT} of a given length. It is possible
+         * that no such sequence exists with the defined length and the returned set
+         * is empty. If {@code length} is less than 2 the returned set is always
+         * empty.
+         * </p>
+         * 
+         * @param length
+         * @return generated sequences
+         */
         public Set<List<? extends Event<?>>> generateValidSequences(int length);
-        
+
+        /**
+         * <p>
+         * Returns the number of states known by the stochastic process, i.e., the
+         * size of its alphabet.
+         * </p>
+         * 
+         * @return number of states
+         */
         public int getNumStates();
-        
+
+        /**
+         * <p>
+         * Returns a string representation of all known states.
+         * </p>
+         * 
+         * @return string representation for all known states
+         */
         public String[] getStateStrings();
-        
+
+        /**
+         * <p>
+         * Returns all states known by the stochastic process, i.e., its
+         * {@link Event}s.
+         * </p>
+         * 
+         * @return events known by the process
+         */
         public Set<? extends Event<?>> getEvents();