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<?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 stdClass as JsonObject;
/**
* A typed value represents a value with an associated type.
*
* @author Markus Lanthaler <mail@markus-lanthaler.com>
*/
final class TypedValue extends Value
{
/**
* The type of the value in the form of an IRI.
*
* @var string
*/
private $type;
/**
* Constructor
*
* @param string $value The value.
* @param string $type The type.
*/
public function __construct($value, $type)
{
$this->setValue($value);
$this->setType($type);
}
/**
* Set the type
*
* For the sake of simplicity, the type is currently just a Node
* identifier in the form of a string and not a Node reference.
* This might be changed in the future.
*
* @param string $type The type.
*
* @return self
*
* @throws \InvalidArgumentException If the type is not a string. No
* further checks are currently done.
*/
public function setType($type)
{
if (!is_string($type)) {
throw new \InvalidArgumentException('type must be a string.');
}
$this->type = $type;
return $this;
}
/**
* Get the type
*
* For the sake of simplicity, the type is currently just a Node
* identifier in the form of a string and not a Node reference.
* This might be changed in the future.
*
* @return string The type.
*/
public function getType()
{
return $this->type;
}
/**
* {@inheritdoc}
*/
public function toJsonLd($useNativeTypes = true)
{
$result = new JsonObject();
if (RdfConstants::XSD_STRING === $this->type) {
$result->{'@value'} = $this->value;
return $result;
}
if (true === $useNativeTypes) {
if (RdfConstants::XSD_BOOLEAN === $this->type) {
if ('true' === $this->value) {
$result->{'@value'} = true;
return $result;
} elseif ('false' === $this->value) {
$result->{'@value'} = false;
return $result;
}
} elseif (RdfConstants::XSD_INTEGER === $this->type) {
if (preg_match('/^[\+|-]?\d+$/', trim($this->value))) {
$result->{'@value'} = intval($this->value);
return $result;
}
} elseif (RdfConstants::XSD_DOUBLE === $this->type) {
// TODO Need to handle +/-INF and NaN as well?
if (preg_match('/^[\+|-]?\d+(?:\.\d*)?(?:[eE][\+|-]?\d+)?$/', trim($this->value))) {
$result->{'@value'} = floatval($this->value);
return $result;
}
// TODO Need to preserve doubles without fraction for round-tripping??
}
}
$result->{'@value'} = $this->value;
$result->{'@type'} = $this->type;
return $result;
}
/**
* {@inheritdoc}
*/
public function equals($other)
{
if (get_class($this) !== get_class($other)) {
return false;
}
return ($this->value === $other->value) && ($this->type === $other->type);
}
}
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