Java Code Examples for io.vavr.control.Option#isEmpty()

/**
 * @param name The qualified name of the tag to write, or none() to have the last item of [getters] deliver a {@link QName}.
 * @param getters Getter function for each sub-protocol to write (and additional first element delivering a QName, if name == none())
 * @param protocols Protocols to use to write each of the getter elements
 */
public TagWriteProtocol(Option<QName> name, Vector<? extends WriteProtocol<XMLEvent,?>> protocols, Vector<Function1<T, ?>> g) {
    if (name.isDefined() && (protocols.size() != g.size()) ||
        name.isEmpty() && (protocols.size() != g.size() - 1)) {
        throw new IllegalArgumentException ("Number of protocols and getters does not match");
    }
    this.name = name;
    this.getName = t -> name.getOrElse(() -> (QName) g.head().apply(t));
    
    Vector<Function1<T, ?>> getters = (name.isEmpty()) ? g.drop(1) : g;
    
    Tuple2<Vector<Tuple2<WriteProtocol<XMLEvent,?>, Function1<T, ?>>>, Vector<Tuple2<WriteProtocol<XMLEvent,?>, Function1<T, ?>>>> partition =
        ((Vector<WriteProtocol<XMLEvent,?>>)protocols).zip(getters)
        .partition(t -> Attribute.class.isAssignableFrom(t._1.getEventType()));
    
    this.attrProtocols = partition._1().map(t -> t._1());
    this.attrGetters = partition._1().map(t -> t._2());
    this.otherProtocols = partition._2().map(t -> t._1());
    this.otherGetters = partition._2().map(t -> t._2());
}
 

public Either<BookHoldFailed, BookPlacedOnHoldEvents> placeOnHold(AvailableBook aBook, HoldDuration duration) {
    Option<Rejection> rejection = patronCanHold(aBook, duration);
    if (rejection.isEmpty()) {
        BookPlacedOnHold bookPlacedOnHold = bookPlacedOnHoldNow(aBook.getBookId(), aBook.type(), aBook.getLibraryBranch(), patron.getPatronId(), duration);
        if (patronHolds.maximumHoldsAfterHolding(aBook)) {
            return announceSuccess(events(bookPlacedOnHold, MaximumNumberOhHoldsReached.now(patron, MAX_NUMBER_OF_HOLDS)));
        }
        return announceSuccess(events(bookPlacedOnHold));
    }
    return announceFailure(bookHoldFailedNow(rejection.get(), aBook.getBookId(), aBook.getLibraryBranch(), patron));
}
 

/**
 * Validates that all the columns being sorted are comparable.
 *
 * @param columns The columns to sort.
 * @return Returns the result as a Try : Success / Failure.
 */
private static Try<Void> validateColumnsAreComparable(Seq<IDataColumn> columns) {
    Option<IDataColumn> invalidCol = columns.find(col -> !col.IsComparable());

    return invalidCol.isEmpty()
            ? Try.success(null)
            : DataTableException.tryError("Column '" + invalidCol.get().name() + "' doesn't support comparable.");
}
 

/**
 * Asserts there is a validation error and returns it, casting it to the given type.
 * Useful for subclasses for concrete Results implementations that have a fixed message type.
 */
protected <M> M validationError(Class<M> type) {
    Option<Object> err = actual.getValidationError(0);
    if (err.isEmpty()) {
        throwAssertionError(new BasicErrorMessageFactory("Expected a Result with validation errors, but instead was %s",
            actualToString()));
    }
    return type.cast(err.get());
}
 

private static long earliest(long a, Option<Instant> b) {
    return (b.isEmpty() || a < b.get().toEpochMilli()) ? a : b.get().toEpochMilli();
}
 

@Override
public boolean isEmpty(SerializerProvider provider, Option<?> value) {
    return value.isEmpty();
}