Start splitting into maven modules

1 files changed, 53 insertions, 0 deletions

diff --git a/base/src/main/java/bjc/utils/data/GeneratingIterator.java b/base/src/main/java/bjc/utils/data/GeneratingIterator.java
new file mode 100644
index 0000000..9abca7c
--- /dev/null
+++ b/base/src/main/java/bjc/utils/data/GeneratingIterator.java
@@ -0,0 +1,53 @@
+package bjc.utils.data;
+
+import java.util.Iterator;
+import java.util.function.Predicate;
+import java.util.function.UnaryOperator;
+
+/**
+ * An iterator that generates a series of elements from a single element.
+ * 
+ * @author bjculkin
+ *
+ * @param <E>
+ *                The type of element generated.
+ */
+public class GeneratingIterator<E> implements Iterator<E> {
+	private E state;
+
+	private UnaryOperator<E> transtion;
+
+	private Predicate<E> stpper;
+
+	/**
+	 * Create a new generative iterator.
+	 * 
+	 * @param initial
+	 *                The initial state of the generator.
+	 * 
+	 * @param transition
+	 *                The function to apply to the state.
+	 * 
+	 * @param stopper
+	 *                The predicate applied to the current state to
+	 *                determine when to stop.
+	 */
+	public GeneratingIterator(E initial, UnaryOperator<E> transition, Predicate<E> stopper) {
+		state = initial;
+		transtion = transition;
+		stpper = stopper;
+	}
+
+	@Override
+	public boolean hasNext() {
+		return stpper.test(state);
+	}
+
+	@Override
+	public E next() {
+		state = transtion.apply(state);
+
+		return state;
+	}
+
+}