1 files changed, 123 insertions, 0 deletions
diff --git a/BJC-Utils2/src/main/java/bjc/utils/funcdata/bst/BinarySearchTreeLeaf.java b/BJC-Utils2/src/main/java/bjc/utils/funcdata/bst/BinarySearchTreeLeaf.java
new file mode 100644
index 0000000..02b9c7a
--- /dev/null
+++ b/BJC-Utils2/src/main/java/bjc/utils/funcdata/bst/BinarySearchTreeLeaf.java
@@ -0,0 +1,123 @@
+package bjc.utils.funcdata.bst;
+
+import java.util.Comparator;
+import java.util.function.BiFunction;
+import java.util.function.Function;
+import java.util.function.Predicate;
+
+import bjc.utils.funcdata.ITreePart;
+
+/**
+ * A leaf in a tree.
+ * 
+ * @author ben
+ *
+ * @param <T>
+ *            The data stored in the tree.
+ */
+public class BinarySearchTreeLeaf<T> implements ITreePart<T> {
+	/**
+	 * The data held in this tree leaf
+	 */
+	protected T			data;
+
+	/**
+	 * Whether this node is soft-deleted or not
+	 */
+	protected boolean	deleted;
+
+	/**
+	 * Create a new leaf holding the specified data.
+	 * 
+	 * @param dat
+	 *            The data for the leaf to hold.
+	 */
+	public BinarySearchTreeLeaf(T dat) {
+		data = dat;
+	}
+
+	/*
+	 * Can't add things to a leaf. (non-Javadoc)
+	 * 
+	 * @see bjc.utils.data.bst.ITreePart#add(java.lang.Object,
+	 * java.util.Comparator)
+	 */
+	@Override
+	public void add(T dat, Comparator<T> comp) {
+		throw new IllegalArgumentException("Can't add to a leaf.");
+	}
+
+	/*
+	 * Just transform our data. (non-Javadoc)
+	 * 
+	 * @see
+	 * bjc.utils.data.bst.ITreePart#collapse(java.util.function.Function,
+	 * java.util.function.BiFunction)
+	 */
+	@Override
+	public <E> E collapse(Function<T, E> f, BiFunction<E, E, E> bf) {
+		return f.apply(data);
+	}
+
+	/*
+	 * Only check our data. (non-Javadoc)
+	 * 
+	 * @see bjc.utils.data.bst.ITreePart#contains(java.lang.Object,
+	 * java.util.Comparator)
+	 */
+	@Override
+	public boolean contains(T data, Comparator<T> cmp) {
+		return this.data.equals(data);
+	}
+
+	/*
+	 * Just get the data (non-Javadoc)
+	 * 
+	 * @see bjc.utils.data.bst.ITreePart#data()
+	 */
+	@Override
+	public T data() {
+		return data;
+	}
+
+	/*
+	 * Just mark ourselves as "not here" (non-Javadoc)
+	 * 
+	 * @see bjc.utils.data.bst.ITreePart#delete(java.lang.Object,
+	 * java.util.Comparator)
+	 */
+	@Override
+	public void delete(T dat, Comparator<T> cmp) {
+		if (data.equals(dat)) {
+			deleted = true;
+		}
+	}
+
+	/*
+	 * Just walk our data and only succede if the walk does, because
+	 * there's nowhere left to go. (non-Javadoc)
+	 * 
+	 * @see bjc.utils.data.bst.ITreePart#directedWalk(bjc.utils.data.bst.
+	 * DirectedWalkFunction)
+	 */
+	@Override
+	public boolean directedWalk(DirectedWalkFunction<T> ds) {
+		switch (ds.walk(data)) {
+			case SUCCESS:
+				return true;
+			default:
+				return false;
+		}
+	}
+
+	/*
+	 * Just check our data. (non-Javadoc)
+	 * 
+	 * @see
+	 * bjc.utils.data.bst.ITreePart#forEach(bjc.utils.data.bst.ITreePart.
+	 * TreeLinearizationMethod, java.util.function.Predicate)
+	 */
+	public boolean forEach(TreeLinearizationMethod tlm, Predicate<T> c) {
+		return c.test(data);
+	}
+}