jltl2ba.APSet: comments, add Iterable<APElement> elements() method

git-svn-id: https://www.prismmodelchecker.org/svn/prism/prism/trunk@11274 bbc10eb1-c90d-0410-af57-cb519fbb1720

prism/src/jltl2ba/APSet.java

@@ -28,6 +28,7 @@ import java.io.PrintStream;
 
 /**
  * Class representing a set of atomic propositions (AP).
+ * The APs are ordered, in insertion order.
  */
 public class APSet implements Iterable<String> {
 	
@@ -120,16 +121,37 @@ public class APSet implements Iterable<String> {
     	return canonical;
 	}
 
+	/** Returns an iterator over the atomic propositions in this set */
 	public Iterator<String> iterator()
 	{
 		return vector.iterator();
 	}
 
+	/**
+	 * Returns an Iterator over the APElements induced by this AP set,
+	 * i.e., all possible subsets for the AP set.
+	 */
 	public Iterator<APElement> elementIterator()
 	{
 		return new APElementIterator(vector.size());
 	}
 
+	/**
+	 * Returns an Iterable over the APElements induced by this AP set,
+	 * i.e., all possible subsets for the AP set.
+	 */
+	public Iterable<APElement> elements()
+	{
+		return new Iterable<APElement>() {
+			@Override
+			public Iterator<APElement> iterator()
+			{
+				return elementIterator();
+			}
+
+		};
+	}
+	
 	public void print(PrintStream out) {
 		for (int i = 0; i < size(); i++) {
 			out.println(i + ": " + getAP(i));