diff options
Diffstat (limited to 'base/src/main/java/bjc/utils/data/internals/WrappedOption.java')
| -rw-r--r-- | base/src/main/java/bjc/utils/data/internals/WrappedOption.java | 96 |
1 files changed, 0 insertions, 96 deletions
diff --git a/base/src/main/java/bjc/utils/data/internals/WrappedOption.java b/base/src/main/java/bjc/utils/data/internals/WrappedOption.java deleted file mode 100644 index 19d5e26..0000000 --- a/base/src/main/java/bjc/utils/data/internals/WrappedOption.java +++ /dev/null @@ -1,96 +0,0 @@ -package bjc.utils.data.internals; - -import java.util.function.Function; -import java.util.function.UnaryOperator; - -import bjc.utils.data.IHolder; -import bjc.utils.data.Option; - -/** - * A wrapped optional value. - * - * @author Ben Culkin. - * @param <ContainedType> - * The wrapped type. - */ -public class WrappedOption<ContainedType> implements IHolder<ContainedType> { - /* The held value. */ - private final IHolder<IHolder<ContainedType>> held; - - /** - * Create a new wrapped option. - * - * @param seedValue - * The value to wrap. - */ - public WrappedOption(final IHolder<ContainedType> seedValue) { - held = new Option<>(seedValue); - } - - /* - * The dummy parameter is to ensure the compiler can pick the right - * method, because without this method erases to the same type as the - * public one. - */ - private WrappedOption(final IHolder<IHolder<ContainedType>> toHold, - @SuppressWarnings("unused") final boolean dummy) { - held = toHold; - } - - @Override - public <BoundType> IHolder<BoundType> bind(final Function<ContainedType, IHolder<BoundType>> binder) { - final 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 <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) { - final 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(final 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(final Function<ContainedType, UnwrappedType> unwrapper) { - return held.unwrap((containedHolder) -> { - return containedHolder.unwrap((containedValue) -> { - if(containedValue == null) return null; - - return unwrapper.apply(containedValue); - }); - }); - } -} |
