Implement Pratt parser.

1 files changed, 46 insertions, 0 deletions

diff --git a/BJC-Utils2/src/main/java/bjc/utils/data/TransformIterator.java b/BJC-Utils2/src/main/java/bjc/utils/data/TransformIterator.java
new file mode 100644
index 0000000..a0987af
--- /dev/null
+++ b/BJC-Utils2/src/main/java/bjc/utils/data/TransformIterator.java
@@ -0,0 +1,46 @@
+package bjc.utils.data;
+
+import java.util.Iterator;
+import java.util.function.Function;
+
+/**
+ * An iterator that transforms values from one type to another.
+ * 
+ * @author EVE
+ *
+ * @param <S>
+ *                The source iterator type.
+ * 
+ * @param <D>
+ *                The destination iterator type.
+ */
+public class TransformIterator<S, D> implements Iterator<D> {
+	private Iterator<S> source;
+
+	private Function<S, D> transform;
+
+	/**
+	 * Create a new transform iterator.
+	 * 
+	 * @param source
+	 *                The source iterator to use.
+	 * 
+	 * @param transform
+	 *                The transform to apply.
+	 */
+	public TransformIterator(Iterator<S> source, Function<S, D> transform) {
+		this.source = source;
+		this.transform = transform;
+	}
+
+	@Override
+	public boolean hasNext() {
+		return source.hasNext();
+	}
+
+	@Override
+	public D next() {
+		return transform.apply(source.next());
+	}
+
+}