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Diffstat (limited to 'BJC-Utils2/src/main/java/bjc/utils/data/lazy/LazyPair.java')
| -rw-r--r-- | BJC-Utils2/src/main/java/bjc/utils/data/lazy/LazyPair.java | 168 |
1 files changed, 0 insertions, 168 deletions
diff --git a/BJC-Utils2/src/main/java/bjc/utils/data/lazy/LazyPair.java b/BJC-Utils2/src/main/java/bjc/utils/data/lazy/LazyPair.java deleted file mode 100644 index dcaeeba..0000000 --- a/BJC-Utils2/src/main/java/bjc/utils/data/lazy/LazyPair.java +++ /dev/null @@ -1,168 +0,0 @@ -package bjc.utils.data.lazy; - -import java.util.function.BiConsumer; -import java.util.function.BiFunction; -import java.util.function.Supplier; - -import bjc.utils.data.IHolder; -import bjc.utils.data.IPair; -import bjc.utils.data.Pair; - -/** - * A lazy holder of two values - * - * Lazy variant of {@link IPair} - * - * @author ben - * - * @param <L> - * The type of value stored on the left side of the pair - * @param <R> - * The type of value stored on the right side of the pair - */ -public class LazyPair<L, R> implements IPair<L, R>, ILazy { - /** - * The backing store for this pair - */ - protected IHolder<IPair<L, R>> delegatePair; - - private boolean materialized = false; - private boolean pendingActions = false; - - /** - * Create a new blank lazy pair - */ - public LazyPair() { - delegatePair = new LazyHolder<>(new Pair<>()); - } - - /** - * Create a new lazy pair with the specified initial values - * - * @param leftValue - * The initial value for the left side of the pair - * @param rightValue - * The initial value for the right side of the pair - */ - public LazyPair(L leftValue, R rightValue) { - materialized = true; - - delegatePair = new LazyHolder<>(new Pair<>(leftValue, rightValue)); - } - - /** - * Create a new lazy pair with the specified sources for initial values - * - * @param leftValueSource - * The function to call for the left initial value - * @param rightValueSource - * The function to call for the right initial value - */ - public LazyPair(Supplier<L> leftValueSource, - Supplier<R> rightValueSource) { - if (leftValueSource == null || rightValueSource == null) { - throw new NullPointerException("Sources must be non-null"); - } - - delegatePair = new LazyHolder<>(() -> { - return new Pair<>(leftValueSource.get(), - rightValueSource.get()); - }); - } - - /** - * Create a new lazy pair with a specified internal delegate - * - * @param delegate - * The internal delegate for the pair - */ - private LazyPair(IHolder<IPair<L, R>> delegate, boolean mater, - boolean pend) { - materialized = mater; - pendingActions = pend; - - delegatePair = delegate; - } - - /* - * (non-Javadoc) - * - * @see bjc.utils.data.IPair#doWith(java.util.function.BiConsumer) - */ - @Override - public void doWith(BiConsumer<L, R> action) { - if (action == null) { - throw new NullPointerException("Action must be non-null"); - } - - pendingActions = true; - - delegatePair.doWith((currentPair) -> { - currentPair.doWith(action); - }); - } - - /* - * (non-Javadoc) - * - * @see bjc.utils.data.IPair#merge(java.util.function.BiFunction) - */ - @Override - public <E> E merge(BiFunction<L, R, E> merger) { - if (merger == null) { - throw new NullPointerException("Merger must be non-null"); - } - - materialized = true; - pendingActions = false; - - return delegatePair - .unwrap((currentPair) -> currentPair.merge(merger)); - } - - @Override - public boolean isMaterialized() { - return materialized; - } - - @Override - public boolean hasPendingActions() { - return pendingActions; - } - - /* - * Note: Materializing will also apply all currently pending actions - */ - @Override - public void materialize() { - merge((left, right) -> null); - - materialized = true; - pendingActions = false; - } - - @Override - public void applyPendingActions() { - merge((left, right) -> null); - - materialized = true; - pendingActions = false; - } - - @Override - public <L2, R2> IPair<L2, R2> bind( - BiFunction<L, R, IPair<L2, R2>> binder) { - IHolder<IPair<L2, R2>> newDelegate = delegatePair - .map((pairVal) -> { - return pairVal.bind(binder); - }); - - return new LazyPair<>(newDelegate, isMaterialized(), - hasPendingActions()); - } - - @Override - public String toString() { - return delegatePair.toString(); - } -}
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