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authorbjculkin <bjculkin@WIT-136XG42.wvu-ad.wvu.edu>2017-02-27 10:11:43 -0500
committerbjculkin <bjculkin@WIT-136XG42.wvu-ad.wvu.edu>2017-02-27 10:11:43 -0500
commite6459a351f14d76dbac83e95a55664820387ad7b (patch)
tree3fba82ce642fb6da2359bf55510b87fcd8064a88 /BJC-Utils2/src/main/java/bjc/utils/data/BoundLazy.java
parent0b4fd83d36eb82c92a39af8b8e1c521d822bd4c3 (diff)
Package reorganization
Diffstat (limited to 'BJC-Utils2/src/main/java/bjc/utils/data/BoundLazy.java')
-rw-r--r--BJC-Utils2/src/main/java/bjc/utils/data/BoundLazy.java162
1 files changed, 0 insertions, 162 deletions
diff --git a/BJC-Utils2/src/main/java/bjc/utils/data/BoundLazy.java b/BJC-Utils2/src/main/java/bjc/utils/data/BoundLazy.java
deleted file mode 100644
index b2ae7ce..0000000
--- a/BJC-Utils2/src/main/java/bjc/utils/data/BoundLazy.java
+++ /dev/null
@@ -1,162 +0,0 @@
-package bjc.utils.data;
-
-import java.util.function.Function;
-import java.util.function.Supplier;
-import java.util.function.UnaryOperator;
-
-import bjc.utils.funcdata.FunctionalList;
-import bjc.utils.funcdata.IList;
-
-/**
- * Implements a lazy holder that has been bound
- */
-class BoundLazy<OldType, BoundContainedType>
- implements IHolder<BoundContainedType> {
- /*
- * The old value
- */
- private Supplier<IHolder<OldType>> oldSupplier;
-
- /*
- * The function to use to transform the old value into a new value
- */
- private Function<OldType, IHolder<BoundContainedType>> binder;
-
- /*
- * The bound value being held
- */
- private IHolder<BoundContainedType> boundHolder;
-
- /*
- * Whether the bound value has been actualized or not
- */
- private boolean holderBound;
-
- /*
- * Transformations currently pending on the bound value
- */
- private IList<UnaryOperator<BoundContainedType>> actions = new FunctionalList<>();
-
- /*
- * Create a new bound lazy value
- */
- public BoundLazy(Supplier<IHolder<OldType>> supp,
- Function<OldType, IHolder<BoundContainedType>> binder) {
- oldSupplier = supp;
- this.binder = binder;
- }
-
- @Override
- public <BoundType> IHolder<BoundType> bind(
- Function<BoundContainedType, IHolder<BoundType>> bindr) {
- if (bindr == null) {
- throw new NullPointerException("Binder must not be null");
- }
-
- /*
- * Prepare a list of pending actions
- */
- IList<UnaryOperator<BoundContainedType>> pendingActions = new FunctionalList<>();
- actions.forEach(pendingActions::add);
-
- /*
- * Create the new supplier of a value
- */
- Supplier<IHolder<BoundContainedType>> typeSupplier = () -> {
- IHolder<BoundContainedType> oldHolder = boundHolder;
-
- /*
- * Bind the value if it hasn't been bound before
- */
- if (!holderBound) {
- oldHolder = oldSupplier.get().unwrap(binder);
- }
-
- /*
- * Apply all the pending actions
- */
- return pendingActions.reduceAux(oldHolder, (action, state) -> {
- return state.transform(action);
- }, (value) -> value);
- };
-
- return new BoundLazy<>(typeSupplier, bindr);
- }
-
- @Override
- public <NewType> Function<BoundContainedType, IHolder<NewType>> lift(
- Function<BoundContainedType, NewType> func) {
- if (func == null) {
- throw new NullPointerException(
- "Function to lift must not be null");
- }
-
- return (val) -> {
- return new Lazy<>(func.apply(val));
- };
- }
-
- @Override
- public <MappedType> IHolder<MappedType> map(
- Function<BoundContainedType, MappedType> mapper) {
- if (mapper == null) {
- throw new NullPointerException("Mapper must not be null");
- }
-
- // Prepare a list of pending actions
- IList<UnaryOperator<BoundContainedType>> pendingActions = new FunctionalList<>();
- actions.forEach(pendingActions::add);
-
- // Prepare the new supplier
- Supplier<MappedType> typeSupplier = () -> {
- IHolder<BoundContainedType> oldHolder = boundHolder;
-
- // Bound the value if it hasn't been bound
- if (!holderBound) {
- oldHolder = oldSupplier.get().unwrap(binder);
- }
-
- return pendingActions.reduceAux(oldHolder.getValue(),
- (action, state) -> {
- return action.apply(state);
- }, (value) -> mapper.apply(value));
- };
-
- return new Lazy<>(typeSupplier);
- }
-
- @Override
- public String toString() {
- if (holderBound) {
- return boundHolder.toString();
- }
-
- return "(unmaterialized)";
- }
-
- @Override
- public IHolder<BoundContainedType> transform(
- UnaryOperator<BoundContainedType> transformer) {
- if (transformer == null) {
- throw new NullPointerException("Transformer must not be null");
- }
-
- actions.add(transformer);
-
- return this;
- }
-
- @Override
- public <UnwrappedType> UnwrappedType unwrap(
- Function<BoundContainedType, UnwrappedType> unwrapper) {
- if (unwrapper == null) {
- throw new NullPointerException("Unwrapper must not be null");
- }
-
- if (!holderBound) {
- boundHolder = oldSupplier.get().unwrap(binder::apply);
- }
-
- return boundHolder.unwrap(unwrapper);
- }
-} \ No newline at end of file