Slight tweak in MDP interface (to match STPG).

git-svn-id: https://www.prismmodelchecker.org/svn/prism/prism/trunk@3399 bbc10eb1-c90d-0410-af57-cb519fbb1720

prism/src/explicit/MDP.java

@@ -37,14 +37,14 @@ import explicit.rewards.*;
 public interface MDP extends Model
 {
 	/**
-	 * Get the number of transitions from choice {@code i} of state {@code s}.
+	 * Get the action label (if any) for choice {@code i} of state {@code s}.
 	 */
-	public int getNumTransitions(int s, int i);
+	public Object getAction(int s, int i);
 
 	/**
-	 * Get the action label (if any) for choice {@code i} of state {@code s}.
+	 * Get the number of transitions from choice {@code i} of state {@code s}.
 	 */
-	public Object getAction(int s, int i);
+	public int getNumTransitions(int s, int i);
 
 	/**
 	 * Get an iterator over the transitions from choice {@code i} of state {@code s}.

prism/src/explicit/MDPSimple.java

@@ -597,12 +597,6 @@ public class MDPSimple extends ModelSimple implements MDP
 
 	// Accessors (for MDP)
 
-	@Override
-	public int getNumTransitions(int s, int i)
-	{
-		return trans.get(s).get(i).size();
-	}
-
 	@Override
 	public Object getAction(int s, int i)
 	{
@@ -612,6 +606,12 @@ public class MDPSimple extends ModelSimple implements MDP
 		return list.get(i);
 	}
 
+	@Override
+	public int getNumTransitions(int s, int i)
+	{
+		return trans.get(s).get(i).size();
+	}
+
 	@Override
 	public Iterator<Entry<Integer, Double>> getTransitionsIterator(int s, int i)
 	{

prism/src/explicit/MDPSparse.java

@@ -588,15 +588,15 @@ public class MDPSparse extends ModelSparse implements MDP
 	// Accessors (for MDP)
 
 	@Override
-	public int getNumTransitions(int s, int i)
+	public Object getAction(int s, int i)
 	{
-		return choiceStarts[rowStarts[s] + i + 1] - choiceStarts[rowStarts[s] + i];
+		return actions == null ? null : actions[rowStarts[s] + i];
 	}
 
 	@Override
-	public Object getAction(int s, int i)
+	public int getNumTransitions(int s, int i)
 	{
-		return actions == null ? null : actions[rowStarts[s] + i];
+		return choiceStarts[rowStarts[s] + i + 1] - choiceStarts[rowStarts[s] + i];
 	}
 
 	@Override