1 files changed, 39 insertions, 0 deletions
diff --git a/src/main/java/bjc/funcdata/SentryList.java b/src/main/java/bjc/funcdata/SentryList.java
new file mode 100644
index 0000000..8a56675
--- /dev/null
+++ b/src/main/java/bjc/funcdata/SentryList.java
@@ -0,0 +1,39 @@
+package bjc.funcdata;
+
+import java.util.List;
+
+/**
+ * A list that logs when items are inserted into it.
+ *
+ * @author bjculkin
+ *
+ * @param <T>
+ *        The type of item in the list.
+ */
+public class SentryList<T> extends FunctionalList<T> {
+	/** Create a new sentry list. */
+	public SentryList() {
+		super();
+	}
+
+	/**
+	 * Create a new sentry list backed by an existing list.
+	 *
+	 * @param backing
+	 *        The backing list.
+	 */
+	public SentryList(final List<T> backing) {
+		super(backing);
+	}
+
+	@Override
+	public boolean add(final T item) {
+		final boolean val = super.add(item);
+
+		if(val) {
+			System.out.println("Added item (" + item + ") to list");
+		}
+
+		return val;
+	}
+}