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Add Quad, the QuadSerializer interface and the NQuads serializer
This allows it to easily serialize data from a JSON-LD document to other formats. This addresses #11.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,68 @@ | ||
| <?php | ||
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| /* | ||
| * (c) Markus Lanthaler <mail@markus-lanthaler.com> | ||
| * | ||
| * For the full copyright and license information, please view the LICENSE | ||
| * file that was distributed with this source code. | ||
| */ | ||
|
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| namespace ML\JsonLD; | ||
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| use ML\JsonLD\Exception\ParseException; | ||
| use ML\IRI\IRI; | ||
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| /** | ||
| * NQuads serializes quads to the NQuads format | ||
| * | ||
| * @author Markus Lanthaler <mail@markus-lanthaler.com> | ||
| */ | ||
| class NQuads implements QuadSerializer | ||
| { | ||
| /** | ||
| * {@inheritDoc} | ||
| */ | ||
| public function serialize(array $quads) | ||
| { | ||
| $result = ''; | ||
| foreach ($quads as $quad) | ||
| { | ||
| $result .= ('_' === $quad->getSubject()->getScheme()) | ||
| ? $quad->getSubject() | ||
| : '<' . $quad->getSubject() . '>'; | ||
| $result .= ' '; | ||
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| $result .= ('_' === $quad->getProperty()->getScheme()) | ||
| ? $quad->getProperty() | ||
| : '<' . $quad->getProperty() . '>'; | ||
| $result .= ' '; | ||
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| if ($quad->getObject() instanceof IRI) | ||
| { | ||
| $result .= ('_' === $quad->getObject()->getScheme()) | ||
| ? $quad->getObject() | ||
| : '<' . $quad->getObject() . '>'; | ||
| } | ||
| else | ||
| { | ||
| $result .= '"' . $quad->getObject()->getValue() . '"'; | ||
| $result .= ($quad->getObject() instanceof TypedValue) | ||
| ? '^^<' . $quad->getObject()->getType() . '>' | ||
| : '@' . $quad->getObject()->getLanguage(); | ||
| } | ||
| $result .= ' '; | ||
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| if ($quad->getGraph()) | ||
| { | ||
| $result .= ('_' === $quad->getGraph()->getScheme()) | ||
| ? $quad->getGraph() : | ||
| '<' . $quad->getGraph() . '>'; | ||
| $result .= ' '; | ||
| } | ||
| $result .= ".\n"; | ||
| } | ||
|
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| return $result; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,154 @@ | ||
| <?php | ||
|
|
||
| /* | ||
| * (c) Markus Lanthaler <mail@markus-lanthaler.com> | ||
| * | ||
| * For the full copyright and license information, please view the LICENSE | ||
| * file that was distributed with this source code. | ||
| */ | ||
|
|
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| namespace ML\JsonLD; | ||
|
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| use ML\IRI\IRI; | ||
|
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| /** | ||
| * A quad | ||
| * | ||
| * @author Markus Lanthaler <mail@markus-lanthaler.com> | ||
| */ | ||
| class Quad | ||
| { | ||
| /** | ||
| * The subject | ||
| * | ||
| * @var IRI | ||
| */ | ||
| private $subject; | ||
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| /** | ||
| * The property or predicate | ||
| * | ||
| * @var IRI | ||
| */ | ||
| private $property; | ||
|
|
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| /** | ||
| * The object | ||
| * | ||
| * @var Value|IRI | ||
| */ | ||
| private $object; | ||
|
|
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| /** | ||
| * The graph | ||
| * | ||
| * @var IRI | ||
| */ | ||
| private $graph; | ||
|
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|
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| /** | ||
| * Constructor | ||
| * | ||
| * @param IRI $subject The subject. | ||
| * @param IRI $property The property. | ||
| * @param Value|IRI $object The object. | ||
| * @param IRI $graph The graph. | ||
| * | ||
| * @throws InvalidArgumentException If the object parameter has a wrong type | ||
| */ | ||
| public function __construct(IRI $subject, IRI $property, $object, IRI $graph = null) | ||
| { | ||
| $this->subject = $subject; | ||
| $this->property = $property; | ||
| $this->setObject($object); // use setter which checks the type | ||
| $this->graph = $graph; | ||
| } | ||
|
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| /** | ||
| * Set the subject | ||
| * | ||
| * @param IRI $subject The subject | ||
| */ | ||
| public function setSubject(IRI $subject) | ||
| { | ||
| $this->subject = $subject; | ||
| } | ||
|
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| /** | ||
| * Get the subject | ||
| * | ||
| * @return IRI The subject | ||
| */ | ||
| public function getSubject() | ||
| { | ||
| return $this->subject; | ||
| } | ||
|
|
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| /** | ||
| * Set the property | ||
| * | ||
| * @param IRI $property The property | ||
| */ | ||
| public function setProperty(IRI $property) | ||
| { | ||
| $this->property = $property; | ||
| } | ||
|
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| /** | ||
| * Get the property | ||
| * | ||
| * @return IRI The property | ||
| */ | ||
| public function getProperty() | ||
| { | ||
| return $this->property; | ||
| } | ||
|
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| /** | ||
| * Set the object | ||
| * | ||
| * @param IRI|Value $object The object | ||
| * | ||
| * @throws InvalidArgumentException If object is of wrong type. | ||
| */ | ||
| public function setObject($object) | ||
| { | ||
| if (!($object instanceof IRI) && !($object instanceof Value)) | ||
| { | ||
| throw new \InvalidArgumentException('Object must be an IRI or Value object'); | ||
| } | ||
|
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| $this->object = $object; | ||
| } | ||
|
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| /** | ||
| * Get the object | ||
| * | ||
| * @return IRI|Value The object | ||
| */ | ||
| public function getObject() | ||
| { | ||
| return $this->object; | ||
| } | ||
|
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| /** | ||
| * Set the graph | ||
| * | ||
| * @param IRI $graph The graph | ||
| */ | ||
| public function setGraph(IRI $graph = null) | ||
| { | ||
| $this->graph = $graph; | ||
| } | ||
|
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| /** | ||
| * Get the graph | ||
| * | ||
| * @return IRI The graph | ||
| */ | ||
| public function getGraph() | ||
| { | ||
| return $this->graph; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,29 @@ | ||
| <?php | ||
|
|
||
| /* | ||
| * (c) Markus Lanthaler <mail@markus-lanthaler.com> | ||
| * | ||
| * For the full copyright and license information, please view the LICENSE | ||
| * file that was distributed with this source code. | ||
| */ | ||
|
|
||
| namespace ML\JsonLD; | ||
|
|
||
| use ML\JsonLD\Exception\ParseException; | ||
|
|
||
| /** | ||
| * Quad serializer interface | ||
| * | ||
| * @author Markus Lanthaler <mail@markus-lanthaler.com> | ||
| */ | ||
| interface QuadSerializer | ||
| { | ||
| /** | ||
| * Serializes quads to a string. | ||
| * | ||
| * @param array $quads Array of {@link Quad Quads} to be serialized | ||
| * | ||
| * @return string The serialized quads. | ||
| */ | ||
| public function serialize(array $quads); | ||
| } |
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