diff options
Diffstat (limited to 'BJC-Utils2/src/main/java/bjc/utils/data/BoundListHolder.java')
| -rw-r--r-- | BJC-Utils2/src/main/java/bjc/utils/data/BoundListHolder.java | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/BJC-Utils2/src/main/java/bjc/utils/data/BoundListHolder.java b/BJC-Utils2/src/main/java/bjc/utils/data/BoundListHolder.java index fe47dcc..a967383 100644 --- a/BJC-Utils2/src/main/java/bjc/utils/data/BoundListHolder.java +++ b/BJC-Utils2/src/main/java/bjc/utils/data/BoundListHolder.java @@ -5,6 +5,9 @@ import java.util.function.UnaryOperator; import bjc.utils.funcdata.IList; +/* + * Holds a list, converted into a holder + */ class BoundListHolder<ContainedType> implements IHolder<ContainedType> { private IList<IHolder<ContainedType>> heldHolders; @@ -15,6 +18,10 @@ class BoundListHolder<ContainedType> implements IHolder<ContainedType> { @Override public <BoundType> IHolder<BoundType> bind( Function<ContainedType, IHolder<BoundType>> binder) { + if (binder == null) { + throw new NullPointerException("Binder must not be null"); + } + IList<IHolder<BoundType>> boundHolders = heldHolders .map((containedHolder) -> { return containedHolder.bind(binder); @@ -26,6 +33,11 @@ class BoundListHolder<ContainedType> implements IHolder<ContainedType> { @Override public <NewType> Function<ContainedType, IHolder<NewType>> lift( Function<ContainedType, NewType> func) { + if (func == null) { + throw new NullPointerException( + "Function to lift must not be null"); + } + return (val) -> { return new ListHolder<>(func.apply(val)); }; @@ -34,6 +46,10 @@ class BoundListHolder<ContainedType> implements IHolder<ContainedType> { @Override public <MappedType> IHolder<MappedType> map( Function<ContainedType, MappedType> mapper) { + if (mapper == null) { + throw new NullPointerException("Mapper must not be null"); + } + IList<IHolder<MappedType>> mappedHolders = heldHolders .map((containedHolder) -> { return containedHolder.map(mapper); @@ -45,6 +61,10 @@ class BoundListHolder<ContainedType> implements IHolder<ContainedType> { @Override public IHolder<ContainedType> transform( UnaryOperator<ContainedType> transformer) { + if (transformer == null) { + throw new NullPointerException("Transformer must not be null"); + } + heldHolders.forEach((containedHolder) -> { containedHolder.transform(transformer); }); @@ -55,6 +75,10 @@ class BoundListHolder<ContainedType> implements IHolder<ContainedType> { @Override public <UnwrappedType> UnwrappedType unwrap( Function<ContainedType, UnwrappedType> unwrapper) { + if (unwrapper == null) { + throw new NullPointerException("Unwrapper must not be null"); + } + return heldHolders.randItem().unwrap(unwrapper); } -} +}
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