Basic data structure code.

Still importing things from the old project.

1 files changed, 54 insertions, 0 deletions

diff --git a/BJC-Utils2/src/main/java/bjc/utils/data/Pair.java b/BJC-Utils2/src/main/java/bjc/utils/data/Pair.java
new file mode 100644
index 0000000..14ac52d
--- /dev/null
+++ b/BJC-Utils2/src/main/java/bjc/utils/data/Pair.java
@@ -0,0 +1,54 @@
+package bjc.utils.data;
+
+import java.util.function.BiFunction;
+import java.util.function.Function;
+
+/**
+ * Holds a pair of values of two different types.
+ * @author ben
+ *
+ * @param <L> The type of the thing held on the left (first)
+ * @param <R> The type of the thing held on the right (second)
+ */
+public class Pair<L, R> {
+	public L	l;
+	public R	r;
+
+	/**
+	 * Create a new pair that holds two nulls.
+	 */
+	public Pair() {
+		
+	}
+	
+	/**
+	 * Create a new pair holding the specified values.
+	 * @param left The value to hold on the left.
+	 * @param right The value to hold on the right.
+	 */
+	public Pair(L left, R right) {
+		l = left;
+		r = right;
+	}
+	
+	/**
+	 * Create a new pair by applying the given functions to the left/right.
+	 * 		Does not change the internal contents of this pair.
+	 * @param lf The function to apply to the left value.
+	 * @param rf The function to apply to the right value.
+	 * @return A new pair containing the two modified values.
+	 */
+	public <L2, R2> Pair<L2, R2> apply(Function<L, L2> lf, Function<R, R2> rf) {
+		return new Pair<L2, R2>(lf.apply(l), rf.apply(r));
+	}
+	
+	/**
+	 * Collapse this pair to a single value.
+	 * 		Does not change the internal contents of this pair.
+	 * @param bf The function to use to collapse the pair.
+	 * @return The collapsed value.
+	 */
+	public <E> E merge(BiFunction<L, R, E> bf) {
+		return bf.apply(l, r);
+	}
+}