ILIAS\Data\Result\Ok Class Reference

A result encapsulates a value or an error and simplifies the handling of those. More...

Inheritance diagram for ILIAS\Data\Result\Ok:

Collaboration diagram for ILIAS\Data\Result\Ok:

Public Member Functions
	__construct ($value)
	isOK ()
	Get to know if the result is ok. More...
	value ()
	Get the encapsulated value. Returns mixed Exceptions More...
	isError ()
	Get to know if the result is an error. More...
	error ()
	Get the encapsulated error. Returns |string Exceptions More...
	valueOr ($default)
	Get the encapsulated value or the supplied default if result is an error. Parameters mixed $default Returns mixed More...
	map (callable $f)
	Create a new result where the contained value is modified with $f.Does nothing if !isOK. Parameters callable $f mixed -> mixed More...
	then (callable $f)
	Get a new result from the callable or do nothing if this is an error.If null is returned from $f, the result is not touched.Does nothing if !isOK. This is monadic bind. Parameters callable $f mixed -> Result|null Exceptions More...
	except (callable $f)
	Feed the error into a callable and replace this with the result or do nothing if this is a value.If null is returned from $f, the error in the result is not touched.Does nothing if !isError. Parameters callable $f string| -> Result|null Exceptions More...

Protected Attributes
	$value

Detailed Description

A result encapsulates a value or an error and simplifies the handling of those.

Author

Stefan Hecken stefa.nosp@m.n.he.nosp@m.cken@.nosp@m.conc.nosp@m.epts-.nosp@m.and-.nosp@m.train.nosp@m.ing..nosp@m.de

Definition at line 16 of file Ok.php.

Constructor & Destructor Documentation

__construct()

ILIAS\Data\Result\Ok::__construct

(

$value

)

Definition at line 23 of file Ok.php.

References ILIAS\Data\Result\Ok\$value, and ILIAS\Data\Result\Ok\value().

    {
        $this->value = $value;
    }

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Member Function Documentation

error()

ILIAS\Data\Result\Ok::error

(

)

Get the encapsulated error.

Returns

|string

Exceptions

Implements ILIAS\Data\Result.

Definition at line 55 of file Ok.php.

    {
        throw new \LogicException("This is a OK result. No error message available");
    }

except()

ILIAS\Data\Result\Ok::except

(

callable

$f

)

Feed the error into a callable and replace this with the result or do nothing if this is a value.If null is returned from $f, the error in the result is not touched.Does nothing if !isError.

Parameters

callable

$f

string| -> Result|null

Exceptions

Implements ILIAS\Data\Result.

Definition at line 100 of file Ok.php.

                                       : Result
    {
        return $this;
    }

isError()

ILIAS\Data\Result\Ok::isError

(

)

Get to know if the result is an error.

Implements ILIAS\Data\Result.

Definition at line 47 of file Ok.php.

                             : bool
    {
        return false;
    }

isOK()

ILIAS\Data\Result\Ok::isOK

(

)

Get to know if the result is ok.

Implements ILIAS\Data\Result.

Definition at line 31 of file Ok.php.

                          : bool
    {
        return true;
    }

map()

ILIAS\Data\Result\Ok::map

(

callable

$f

)

Create a new result where the contained value is modified with $f.Does nothing if !isOK.

Parameters

callable

$f

mixed -> mixed

Implements ILIAS\Data\Result.

Definition at line 71 of file Ok.php.

References Vendor\Package\$f, ILIAS\Data\Result\Ok\$value, and ILIAS\Data\Result\Ok\value().

                                    : Result
    {
        $clone = clone $this;
        $value = $f($this->value);
        $clone->value = $value;
        return $clone;
    }

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then()

ILIAS\Data\Result\Ok::then

(

callable

$f

)

Get a new result from the callable or do nothing if this is an error.If null is returned from $f, the result is not touched.Does nothing if !isOK. This is monadic bind.

Parameters

callable

$f

mixed -> Result|null

Exceptions

Implements ILIAS\Data\Result.

Definition at line 82 of file Ok.php.

References Vendor\Package\$f, and ILIAS\Data\Result\Ok\value().

                                     : Result
    {
        $result = $f($this->value);

        if ($result === null) {
            return $this;
        }

        if (!$result instanceof Result) {
            throw new \UnexpectedValueException("The returned type of callable is not an instance of interface Result");
        }

        return $result;
    }

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value()

ILIAS\Data\Result\Ok::value

(

)

Get the encapsulated value.

Returns

mixed

Exceptions

Implements ILIAS\Data\Result.

Definition at line 39 of file Ok.php.

References ILIAS\Data\Result\Ok\$value.

Referenced by ILIAS\Data\Result\Ok\__construct(), ILIAS\Data\Result\Ok\map(), and ILIAS\Data\Result\Ok\then().

    {
        return $this->value;
    }

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valueOr()

ILIAS\Data\Result\Ok::valueOr

(

$default

)

Get the encapsulated value or the supplied default if result is an error.

Parameters

mixed

$default

Returns

mixed

Implements ILIAS\Data\Result.

Definition at line 63 of file Ok.php.

References ILIAS\Data\Result\Ok\$value.

    {
        return $this->value;
    }

Field Documentation

$value

ILIAS\Data\Result\Ok::$value

protected

Definition at line 21 of file Ok.php.

Referenced by ILIAS\Data\Result\Ok\__construct(), ILIAS\Data\Result\Ok\map(), ILIAS\Data\Result\Ok\value(), and ILIAS\Data\Result\Ok\valueOr().

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The documentation for this class was generated from the following file:

• src/Data/Result/Ok.php