General changes

1 files changed, 89 insertions, 0 deletions

diff --git a/BJC-Utils2/src/main/java/bjc/utils/data/WrappedOption.java b/BJC-Utils2/src/main/java/bjc/utils/data/WrappedOption.java
new file mode 100644
index 0000000..c36cafa
--- /dev/null
+++ b/BJC-Utils2/src/main/java/bjc/utils/data/WrappedOption.java
@@ -0,0 +1,89 @@
+package bjc.utils.data;
+
+import java.util.function.Function;
+import java.util.function.UnaryOperator;
+
+class WrappedOption<ContainedType> implements IHolder<ContainedType> {
+	private IHolder<IHolder<ContainedType>> held;
+
+	private WrappedOption(IHolder<IHolder<ContainedType>> toHold,
+			@SuppressWarnings("unused") boolean dummy) {
+		held = toHold;
+	}
+
+	public WrappedOption(IHolder<ContainedType> seedValue) {
+		held = new Option<>(seedValue);
+	}
+
+	@Override
+	public <BoundType> IHolder<BoundType> bind(
+			Function<ContainedType, IHolder<BoundType>> binder) {
+		IHolder<IHolder<BoundType>> newHolder = held
+				.map((containedHolder) -> {
+					return containedHolder.bind((containedValue) -> {
+						if (containedValue == null) {
+							return new Option<>(null);
+						}
+
+						return binder.apply(containedValue);
+					});
+				});
+
+		return new WrappedOption<>(newHolder, false);
+	}
+
+	@Override
+	public <MappedType> IHolder<MappedType> map(
+			Function<ContainedType, MappedType> mapper) {
+		IHolder<IHolder<MappedType>> newHolder = held
+				.map((containedHolder) -> {
+					return containedHolder.map((containedValue) -> {
+						if (containedValue == null) {
+							return null;
+						}
+
+						return mapper.apply(containedValue);
+					});
+				});
+
+		return new WrappedOption<>(newHolder, false);
+	}
+
+	@Override
+	public IHolder<ContainedType> transform(
+			UnaryOperator<ContainedType> transformer) {
+		held.transform((containedHolder) -> {
+			return containedHolder.transform((containedValue) -> {
+				if (containedValue == null) {
+					return null;
+				}
+
+				return transformer.apply(containedValue);
+			});
+		});
+
+		return this;
+	}
+
+	@Override
+	public <UnwrappedType> UnwrappedType unwrap(
+			Function<ContainedType, UnwrappedType> unwrapper) {
+		return held.unwrap((containedHolder) -> {
+			return containedHolder.unwrap((containedValue) -> {
+				if (containedValue == null) {
+					return null;
+				}
+
+				return unwrapper.apply(containedValue);
+			});
+		});
+	}
+
+	@Override
+	public <NewType> Function<ContainedType, IHolder<NewType>> lift(
+			Function<ContainedType, NewType> func) {
+		return (val) -> {
+			return new Option<>(func.apply(val));
+		};
+	}
+}