Load::objects() - Code Metrics - Stratadox/TableLoader - Measure and Improve Code Quality continuously with Scrutinizer

Load::objects() A
last analyzed 2018-11-18 12:18 UTC

↳ Parent: Load

Complexity

Conditions	2
Paths	2

Size

Total Lines	11
Code Lines	8

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	2
eloc	8
nc	2
nop	0
dl	0
loc	11
rs	10
c	0
b	0
f	0

<?php
declare(strict_types=1);

namespace Stratadox\TableLoader\Builder;

use function count;
use Stratadox\Hydration\Mapper\Mapper;
use Stratadox\HydrationMapper\InvalidMapperConfiguration;
use Stratadox\Hydrator\ArrayHydrator;
use Stratadox\Hydrator\Hydrates;
use Stratadox\Hydrator\SimpleHydrator;
use Stratadox\Hydrator\VariadicConstructor;
use Stratadox\Instantiator\CannotInstantiateThis;
use Stratadox\TableLoader\Loader\From;
use Stratadox\TableLoader\Loader\HasMany;
use Stratadox\TableLoader\Loader\HasOne;
use Stratadox\TableLoader\Loader\Identified;
use Stratadox\TableLoader\Loader\MakesObjects;
use Stratadox\TableLoader\Loader\Objects;
use Stratadox\TableLoader\Loader\Prefixed;
use Stratadox\TableLoader\Loader\To;
use Stratadox\TableLoader\Loader\Wire;
use Stratadox\TableLoader\Loader\Wired;
use Stratadox\TableLoader\Loader\WiresObjects;

/**
 * Builds the required infrastructure to load objects that have no parents.
 *
 * @author Stratadox
 */
final class Load implements DefinesSingleClassMapping
{
    private $label;
    private $ownId = ['id'];
    private $identityColumnsFor = [];
    private $class;
    private $properties = [];
    private $relation = [];

    private function __construct(string $label)
    {
        $this->label = $label;
        $this->identityColumnsFor[$label] = [$label . '_id'];
    }

    /**
     * Makes a new builder to load each of the entities that have this label.
     *
     * @param string $label
     * @return DefinesSingleClassMapping
     */
    public static function each(string $label): DefinesSingleClassMapping
    {
        return new self($label);
    }

    /** @inheritdoc */
    public function by(string ...$columns): DefinesSingleClassMapping
    {
        $label = $this->label;
        $new = clone $this;
        $new->ownId = $columns;
        $new->identityColumnsFor[$label] = $this->mapThe($columns, $label . '_');
        return $new;
    }

    /** @inheritdoc */
    public function as(
        string $class,
        array $properties = []
    ): DefinesSingleClassMapping {
        $new = clone $this;
        $new->class = $class;
        $new->properties = $properties;
        return $new;
    }

    /** @inheritdoc */
    public function havingOne(
        string $property,
        string $label
    ): DefinesObjectMapping {
        $new = clone $this;
        $new->relation[$label] = HasOne::in($property);
        return $new;
    }

    /** @inheritdoc */
    public function havingMany(
        string $property,
        string $label,
        string $collectionClass = null
    ): DefinesObjectMapping {
        $hydrator = $collectionClass ?
            VariadicConstructor::forThe($collectionClass) :
            ArrayHydrator::create();
        $new = clone $this;
        $new->relation[$label] = HasMany::in($property, $hydrator);
        return $new;
    }

    /** @inheritdoc */
    public function identifying(
        string $label,
        string ...$columns
    ): DefinesObjectMapping {
        $new = clone $this;
        $new->identityColumnsFor[$label] = $columns;
        return $new;
    }

    /** @inheritdoc */
    public function label(): string
    {
        return $this->label;
    }

    /** @inheritdoc */
    public function identityColumns(): array
    {
        return $this->identityColumnsFor[$this->label];
    }

    /** @inheritdoc */
    public function objects(): MakesObjects
    {
        try {
            $hydrator = $this->hydratorFor($this->class, $this->properties);
        } catch (CannotInstantiateThis|InvalidMapperConfiguration $exception) {
            throw CannotProduceObjects::encountered($exception, $this->label);
        }
        return Objects::producedByThis(
            $hydrator,
            Prefixed::with($this->label),
            Identified::by(...$this->ownId)
        );
    }

    /** @inheritdoc */
    public function wiring(): WiresObjects
    {
        $ownLabel = $this->label;
        $ownId = $this->identityColumnsFor[$ownLabel];
        $wires = [];
        foreach ($this->relation as $otherLabel => $connectThem) {
            $this->mustKnowTheIdentityColumnsFor($otherLabel);
            $otherId = $this->identityColumnsFor[$otherLabel];
            $wires[] = Wire::it(
                From::the($ownLabel, Identified::by(...$ownId)),
                To::the($otherLabel, Identified::by(...$otherId)),
                $connectThem
            );
        }
        if (count($wires) === 1) {
            return $wires[0];
        }
        return Wired::together(...$wires);
    }

    /**
     * Prepends the identifying columns with a label.
     *
     * @param array $columns
     * @return array
     */
    private function mapThe(array $columns, string $prefix): array
    {
        return array_map(function(string $column) use ($prefix): string {
            return $prefix . $column;
        }, $columns);
    }

    /**
     * Produces a hydrator to prepare the objects.
     *
     * @param string $class
     * @param array  $properties
     *
     * @return Hydrates
     * @throws CannotInstantiateThis
     * @throws InvalidMapperConfiguration
     */
    private function hydratorFor(string $class, array $properties): Hydrates
    {
        if (empty($properties)) {
            return SimpleHydrator::forThe($class);
        }
        $mapper = Mapper::forThe($class);
        foreach ($properties as $name => $instruction) {
            $mapper = $mapper->property($name, $instruction);
        }
        return $mapper->finish();
    }

    /**
     * Checks that the columns that identify the label are known.
     *
     * @param string $label           The label we need to identify.
     * @throws CannotMakeTableMapping When the label cannot be identified.
     */
    private function mustKnowTheIdentityColumnsFor(string $label): void
    {
        if (!isset($this->identityColumnsFor[$label])) {
            throw CannotMakeMapping::missingTheIdentityColumns($label, $this->label);
        }
    }
}


1			<?php
2			declare(strict_types=1);
3
4			namespace Stratadox\TableLoader\Builder;
5
6			use function count;
7			use Stratadox\Hydration\Mapper\Mapper;
8			use Stratadox\HydrationMapper\InvalidMapperConfiguration;
9			use Stratadox\Hydrator\ArrayHydrator;
10			use Stratadox\Hydrator\Hydrates;
11			use Stratadox\Hydrator\SimpleHydrator;
12			use Stratadox\Hydrator\VariadicConstructor;
13			use Stratadox\Instantiator\CannotInstantiateThis;
14			use Stratadox\TableLoader\Loader\From;
15			use Stratadox\TableLoader\Loader\HasMany;
16			use Stratadox\TableLoader\Loader\HasOne;
17			use Stratadox\TableLoader\Loader\Identified;
18			use Stratadox\TableLoader\Loader\MakesObjects;
19			use Stratadox\TableLoader\Loader\Objects;
20			use Stratadox\TableLoader\Loader\Prefixed;
21			use Stratadox\TableLoader\Loader\To;
22			use Stratadox\TableLoader\Loader\Wire;
23			use Stratadox\TableLoader\Loader\Wired;
24			use Stratadox\TableLoader\Loader\WiresObjects;
25
26			/**
27			* Builds the required infrastructure to load objects that have no parents.
28			*
29			* @author Stratadox
30			*/
31			final class Load implements DefinesSingleClassMapping
32			{
33			private $label;
34			private $ownId = ['id'];
35			private $identityColumnsFor = [];
36			private $class;
37			private $properties = [];
38			private $relation = [];
39
40			private function __construct(string $label)
41			{
42			$this->label = $label;
43			$this->identityColumnsFor[$label] = [$label . '_id'];
44			}
45
46			/**
47			* Makes a new builder to load each of the entities that have this label.
48			*
49			* @param string $label
50			* @return DefinesSingleClassMapping
51			*/
52			public static function each(string $label): DefinesSingleClassMapping
53			{
54			return new self($label);
55			}
56
57			/** @inheritdoc */
58			public function by(string ...$columns): DefinesSingleClassMapping
59			{
60			$label = $this->label;
61			$new = clone $this;
62			$new->ownId = $columns;
63			$new->identityColumnsFor[$label] = $this->mapThe($columns, $label . '_');
64			return $new;
65			}
66
67			/** @inheritdoc */
68			public function as(
69			string $class,
70			array $properties = []
71			): DefinesSingleClassMapping {
72			$new = clone $this;
73			$new->class = $class;
74			$new->properties = $properties;
75			return $new;
76			}
77
78			/** @inheritdoc */
79			public function havingOne(
80			string $property,
81			string $label
82			): DefinesObjectMapping {
83			$new = clone $this;
84			$new->relation[$label] = HasOne::in($property);
85			return $new;
86			}
87
88			/** @inheritdoc */
89			public function havingMany(
90			string $property,
91			string $label,
92			string $collectionClass = null
93			): DefinesObjectMapping {
94			$hydrator = $collectionClass ?
95			VariadicConstructor::forThe($collectionClass) :
96			ArrayHydrator::create();
97			$new = clone $this;
98			$new->relation[$label] = HasMany::in($property, $hydrator);
99			return $new;
100			}
101
102			/** @inheritdoc */
103			public function identifying(
104			string $label,
105			string ...$columns
106			): DefinesObjectMapping {
107			$new = clone $this;
108			$new->identityColumnsFor[$label] = $columns;
109			return $new;
110			}
111
112			/** @inheritdoc */
113			public function label(): string
114			{
115			return $this->label;
116			}
117
118			/** @inheritdoc */
119			public function identityColumns(): array
120			{
121			return $this->identityColumnsFor[$this->label];
122			}
123
124			/** @inheritdoc */
125			public function objects(): MakesObjects
126			{
127			try {
128			$hydrator = $this->hydratorFor($this->class, $this->properties);
129			} catch (CannotInstantiateThis\|InvalidMapperConfiguration $exception) {
130			throw CannotProduceObjects::encountered($exception, $this->label);
131			}
132			return Objects::producedByThis(
133			$hydrator,
134			Prefixed::with($this->label),
135			Identified::by(...$this->ownId)
136			);
137			}
138
139			/** @inheritdoc */
140			public function wiring(): WiresObjects
141			{
142			$ownLabel = $this->label;
143			$ownId = $this->identityColumnsFor[$ownLabel];
144			$wires = [];
145			foreach ($this->relation as $otherLabel => $connectThem) {
146			$this->mustKnowTheIdentityColumnsFor($otherLabel);
147			$otherId = $this->identityColumnsFor[$otherLabel];
148			$wires[] = Wire::it(
149			From::the($ownLabel, Identified::by(...$ownId)),
150			To::the($otherLabel, Identified::by(...$otherId)),
151			$connectThem
152			);
153			}
154			if (count($wires) === 1) {
155			return $wires[0];
156			}
157			return Wired::together(...$wires);
158			}
159
160			/**
161			* Prepends the identifying columns with a label.
162			*
163			* @param array $columns
164			* @return array
165			*/
166			private function mapThe(array $columns, string $prefix): array
167			{
168			return array_map(function(string $column) use ($prefix): string {
169			return $prefix . $column;
170			}, $columns);
171			}
172
173			/**
174			* Produces a hydrator to prepare the objects.
175			*
176			* @param string $class
177			* @param array $properties
178			*
179			* @return Hydrates
180			* @throws CannotInstantiateThis
181			* @throws InvalidMapperConfiguration
182			*/
183			private function hydratorFor(string $class, array $properties): Hydrates
184			{
185			if (empty($properties)) {
186			return SimpleHydrator::forThe($class);
187			}
188			$mapper = Mapper::forThe($class);
189			foreach ($properties as $name => $instruction) {
190			$mapper = $mapper->property($name, $instruction);
191			}
192			return $mapper->finish();
193			}
194
195			/**
196			* Checks that the columns that identify the label are known.
197			*
198			* @param string $label The label we need to identify.
199			* @throws CannotMakeTableMapping When the label cannot be identified.
200			*/
201			private function mustKnowTheIdentityColumnsFor(string $label): void
202			{
203			if (!isset($this->identityColumnsFor[$label])) {
204			throw CannotMakeMapping::missingTheIdentityColumns($label, $this->label);
205			}
206			}
207			}
208

Stratadox / TableLoader

Load::objects() A last analyzed 2018-11-18 12:18 UTC

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Load::objects() A
last analyzed 2018-11-18 12:18 UTC