summaryrefslogtreecommitdiff
path: root/BJC-Utils2/src/main/java/bjc/utils/data/Option.java
diff options
context:
space:
mode:
authorBenjamin J. Culkin <bjculkin@mix.wvu.edu>2017-10-08 22:39:59 -0300
committerBenjamin J. Culkin <bjculkin@mix.wvu.edu>2017-10-08 22:39:59 -0300
commitc82e3b3b2de0633317ec8fc85925e91422820597 (patch)
tree96567416ce23c5ce85601f9cedc3a94bb1c55cba /BJC-Utils2/src/main/java/bjc/utils/data/Option.java
parentb3ac1c8690c3e14c879913e5dcc03a5f5e14876e (diff)
Start splitting into maven modules
Diffstat (limited to 'BJC-Utils2/src/main/java/bjc/utils/data/Option.java')
-rw-r--r--BJC-Utils2/src/main/java/bjc/utils/data/Option.java93
1 files changed, 0 insertions, 93 deletions
diff --git a/BJC-Utils2/src/main/java/bjc/utils/data/Option.java b/BJC-Utils2/src/main/java/bjc/utils/data/Option.java
deleted file mode 100644
index 37e0cde..0000000
--- a/BJC-Utils2/src/main/java/bjc/utils/data/Option.java
+++ /dev/null
@@ -1,93 +0,0 @@
-package bjc.utils.data;
-
-import java.util.function.Function;
-import java.util.function.UnaryOperator;
-
-/**
- * A holder that may or may not contain a value
- *
- * @author ben
- *
- * @param <ContainedType>
- * The type of the value that may or may not be held
- */
-public class Option<ContainedType> implements IHolder<ContainedType> {
- private ContainedType held;
-
- /**
- * Create a new optional, using the given initial value
- *
- * @param seed
- * The initial value for the optional
- */
- public Option(final ContainedType seed) {
- held = seed;
- }
-
- @Override
- public <BoundType> IHolder<BoundType> bind(final Function<ContainedType, IHolder<BoundType>> binder) {
- if (held == null) return new Option<>(null);
-
- return binder.apply(held);
- }
-
- @Override
- public <NewType> Function<ContainedType, IHolder<NewType>> lift(final Function<ContainedType, NewType> func) {
- return val -> {
- return new Option<>(func.apply(val));
- };
- }
-
- @Override
- public <MappedType> IHolder<MappedType> map(final Function<ContainedType, MappedType> mapper) {
- if (held == null) return new Option<>(null);
-
- return new Option<>(mapper.apply(held));
- }
-
- @Override
- public IHolder<ContainedType> transform(final UnaryOperator<ContainedType> transformer) {
- if (held != null) {
- held = transformer.apply(held);
- }
-
- return this;
- }
-
- @Override
- public <UnwrappedType> UnwrappedType unwrap(final Function<ContainedType, UnwrappedType> unwrapper) {
- if (held == null) return null;
-
- return unwrapper.apply(held);
- }
-
- @Override
- public String toString() {
- return String.format("Option [held='%s']", held);
- }
-
- @Override
- public int hashCode() {
- final int prime = 31;
-
- int result = 1;
- result = prime * result + (held == null ? 0 : held.hashCode());
-
- return result;
- }
-
- @Override
- public boolean equals(final Object obj) {
- if (this == obj) return true;
- if (obj == null) return false;
- if (!(obj instanceof Option<?>)) return false;
-
- final Option<?> other = (Option<?>) obj;
-
- if (held == null) {
- if (other.held != null) return false;
- } else if (!held.equals(other.held)) return false;
-
- return true;
- }
-}