diff options
Diffstat (limited to 'base/src/main/java/bjc/utils/data/Identity.java')
| -rw-r--r-- | base/src/main/java/bjc/utils/data/Identity.java | 112 |
1 files changed, 0 insertions, 112 deletions
diff --git a/base/src/main/java/bjc/utils/data/Identity.java b/base/src/main/java/bjc/utils/data/Identity.java deleted file mode 100644 index 44ddc31..0000000 --- a/base/src/main/java/bjc/utils/data/Identity.java +++ /dev/null @@ -1,112 +0,0 @@ -package bjc.utils.data; - -import java.util.function.Function; -import java.util.function.UnaryOperator; - -/** - * Simple implementation of IHolder that has no hidden behavior. - * - * @author ben - * - * @param <ContainedType> - * The type contained in the holder. - */ -public class Identity<ContainedType> implements IHolder<ContainedType> { - /* The held value. */ - private ContainedType heldValue; - - /** Create a holder holding null */ - public Identity() { - heldValue = null; - } - - /** - * Create a holder holding the specified value. - * - * @param value - * The value to hold. - */ - public Identity(final ContainedType value) { - heldValue = value; - } - - @Override - public <BoundType> IHolder<BoundType> bind(final Function<ContainedType, IHolder<BoundType>> binder) { - return binder.apply(heldValue); - } - - @Override - public int hashCode() { - final int prime = 31; - int result = 1; - - result = prime * result + (heldValue == null ? 0 : heldValue.hashCode()); - - return result; - } - - @Override - public boolean equals(final Object obj) { - if(this == obj) return true; - if(obj == null) return false; - if(!(obj instanceof Identity)) return false; - - final Identity<?> other = (Identity<?>) obj; - - if(heldValue == null) { - if(other.heldValue != null) return false; - } else if(!heldValue.equals(other.heldValue)) return false; - - return true; - } - - @Override - public <NewType> Function<ContainedType, IHolder<NewType>> lift(final Function<ContainedType, NewType> func) { - return (val) -> { - return new Identity<>(func.apply(val)); - }; - } - - @Override - public <MappedType> IHolder<MappedType> map(final Function<ContainedType, MappedType> mapper) { - return new Identity<>(mapper.apply(heldValue)); - } - - @Override - public String toString() { - return String.format("Identity [heldValue=%s]", heldValue); - } - - @Override - public IHolder<ContainedType> transform(final UnaryOperator<ContainedType> transformer) { - heldValue = transformer.apply(heldValue); - - return this; - } - - @Override - public <UnwrappedType> UnwrappedType unwrap(final Function<ContainedType, UnwrappedType> unwrapper) { - return unwrapper.apply(heldValue); - } - - /** - * Create a new identity container. - * - * @param val - * The contained value. - * - * @return A new identity container. - */ - public static <ContainedType> Identity<ContainedType> id(final ContainedType val) { - return new Identity<>(val); - } - - /** - * Create a new empty identity container. - * - * @return A new empty identity container. - */ - public static <ContainedType> Identity<ContainedType> id() { - return new Identity<>(); - } -} |
