Java Try.failure方法代码示例

import io.vavr.control.Try; //导入方法依赖的package包/类
/**
 * Returns the value of a particular row column as a specific type.
 * This method performs bounds checks and type checks. Any errors
 * will return a Try.failure.
 *
 * @param type The data type.
 * @param idx The index of the column.
 * @param <T> The value type.
 * @return Returns the value at the specified index.
 */
public <T> Try<T> tryGetAs(Class<T> type, Integer idx) {

    // Get the column as it's typed version.
    Try<DataColumn<T>> col = this.table.columns()
            .tryGet(idx)
            .flatMap(c -> c.asType(type));

    return col.isFailure()
            ? Try.failure(col.getCause())
            : Try.success(col.get().valueAt(this.rowIdx));
}
 

import io.vavr.control.Try; //导入方法依赖的package包/类
@Override
public final Try<T> value() {
    List<Try<X>> outcomes = results.map(Result::value);
    if (!outcomes.filter(Try::isFailure).isEmpty()) {
        return Try.failure(
                new RuntimeException(
                        String.join("\r\n", issues())
                )
        );
    }
    return Try.success(
        outcomes.map(Try::get).transform(transformFunction)
    );
}
 

import io.vavr.control.Try; //导入方法依赖的package包/类
@Override
public final Try<T> value() {
    return Try.failure(
        new RuntimeException(
            String.join("\r\n", issues)
        )
    );
}
 

import io.vavr.control.Try; //导入方法依赖的package包/类
private Try<Object> columnToValue(Try<IDataColumn> column) {
    return column.isSuccess()
            ? Try.success(column.get().valueAt(this.rowIdx))
            : Try.failure(column.getCause());
}
 

import io.vavr.control.Try; //导入方法依赖的package包/类
/**
 * Used to perform a type check and cast on an object instance.
 * Returns a Try success or failure depending on if it was valid cast.
 *
 * @param <T> The type to return.
 * @param type The type to cast to.
 * @param obj The object to cast.
 * @return Returns a Success<T> or a Failure.
 */
@SuppressWarnings({"unchecked"})
static <T> Try<T> tryCast(Class<T> type, Object obj) {
    return type.isInstance(obj)
            ? Try.success((T)obj)
            : Try.failure(new DataTableException("Invalid cast."));
}
 

import io.vavr.control.Try; //导入方法依赖的package包/类
/**
 * Asserts the argument is not null. Returns in a Try.
 *
 * @param <T> The argument type.
 * @param argument The argument to check.
 * @param name The name of the argument.
 * @return Returns a Try testing the argument being null.
 */
public static <T> Try<T> tryNotNull(T argument, String name) {
    return argument == null
            ? Try.failure(new IllegalArgumentException("Invalid value [NULL] for argument " + name))
            : Try.success(argument);
}
 

import io.vavr.control.Try; //导入方法依赖的package包/类
/**
 * Creates a DataTableException wrapped in a Try.
 *
 * @param errorMessage The error message.
 * @param <T> The Try type.
 * @return Returns a new DataTable Exception in a try.
 */
public static <T> Try<T> tryError(String errorMessage) {
    return Try.failure(new DataTableException(errorMessage));
}