/** Constructor
*
*/
public function __construct($value, $lang = null, $datatype = null)
{
if (EasyRdf_Utils::is_associative_array($value)) {
$this->_value = isset($value['value']) ? $value['value'] : null;
$this->_lang = isset($value['lang']) ? $value['lang'] : null;
$this->_datatype = isset($value['datatype']) ? $value['datatype'] : null;
} else {
$this->_value = $value;
$this->_lang = $lang ? $lang : null;
$this->_datatype = $datatype ? $datatype : null;
}
// Automatic datatype selection
if ($this->_datatype == null) {
if (is_float($this->_value)) {
$this->_datatype = 'xsd:decimal';
} else {
if (is_int($this->_value)) {
$this->_datatype = 'xsd:integer';
} else {
if (is_bool($this->_value)) {
$this->_datatype = 'xsd:boolean';
}
}
}
}
// Expand shortened URIs (qnames)
if ($this->_datatype) {
$this->_datatype = EasyRdf_Namespace::expand($this->_datatype);
}
}
protected function generateList($subject, $property, $list)
{
$current = $subject;
$prop = $property;
// Output a blank node for each item in the list
foreach ($list as $item) {
$newNode = $this->_graph->newBNodeId();
$this->addTriple($current, $prop, array('type' => 'bnode', 'value' => $newNode));
$this->addTriple($newNode, 'rdf:first', $item);
$current = $newNode;
$prop = 'rdf:rest';
}
// Finally, terminate the list
$this->addTriple($current, $prop, array('type' => 'uri', 'value' => EasyRdf_Namespace::expand('rdf:nil')));
}
public function testExpandNonString()
{
$this->setExpectedException('InvalidArgumentException', '$shortUri should be a string and cannot be null or empty');
EasyRdf_Namespace::expand($this);
}
/** Get all the resources in the graph of a certain type
*
* If no resources of the type are available and empty
* array is returned.
*
* @param string $type The type of the resource (e.g. foaf:Person)
* @return array The array of resources
*/
public function allOfType($type)
{
$uri = EasyRdf_Namespace::expand($type);
$resource = $this->resource($uri);
return $resource->all('-rdf:type');
}
/**
* Delete an existing RDF type mapping.
*
* @param string $type The RDF type (e.g. foaf:Person)
*/
public static function delete($type)
{
if (!is_string($type) or $type == null or $type == '') {
throw new InvalidArgumentException("\$type should be a string and cannot be null or empty");
}
$type = EasyRdf_Namespace::expand($type);
if (isset(self::$_map[$type])) {
unset(self::$_map[$type]);
}
}
/** Add one or more rdf:type properties to a resource
*
* @param string $resource The resource to add the type to
* @param string $type The new type (e.g. foaf:Person)
*/
public function addType($resource, $types)
{
$this->checkResourceParam($resource, true);
if (!is_array($types)) {
$types = array($types);
}
foreach ($types as $type) {
$type = EasyRdf_Namespace::expand($type);
$this->add($resource, 'rdf:type', array('type' => 'uri', 'value' => $type));
}
}
/**
* Method to serialise an EasyRdf_Graph into RDF/PHP
*
* http://n2.talis.com/wiki/RDF_PHP_Specification
*/
protected function to_rdfphp($graph)
{
$rdfphp = array();
foreach ($graph->resources() as $resource) {
$properties = $resource->properties();
if (count($properties) == 0) {
continue;
}
$subj = $resource->getUri();
if (!isset($rdfphp[$subj])) {
$rdfphp[$subj] = array();
}
foreach ($properties as $property) {
$prop = EasyRdf_Namespace::expand($property);
if ($prop) {
if (!isset($rdfphp[$subj][$prop])) {
$rdfphp[$subj][$prop] = array();
}
$objects = $resource->all($property);
foreach ($objects as $obj) {
if (is_object($obj) and $obj instanceof EasyRdf_Resource) {
if ($obj->isBNode()) {
$object = array('type' => 'bnode', 'value' => $obj->getUri());
} else {
$object = array('type' => 'uri', 'value' => $obj->getUri());
}
} else {
$object = array('type' => 'literal', 'value' => $obj);
}
array_push($rdfphp[$subj][$prop], $object);
}
}
}
}
return $rdfphp;
}
/** Constructor for creating a new literal
*
* @param string $value The value of the literal
* @param string $lang The natural language of the literal or null (e.g. 'en')
* @param string $datatype The datatype of the literal or null (e.g. 'xsd:string')
* @return object EasyRdf_Literal
*/
public function __construct($value, $lang = null, $datatype = null)
{
$this->_value = $value;
$this->_lang = $lang ? $lang : null;
$this->_datatype = $datatype ? $datatype : null;
if ($this->_datatype) {
// Expand shortened URIs (qnames)
$this->_datatype = EasyRdf_Namespace::expand($this->_datatype);
// Literals can not have both a language and a datatype
$this->_lang = null;
} else {
// Set the datatype based on the subclass
$class = get_class($this);
if (isset(self::$_classMap[$class])) {
$this->_datatype = self::$_classMap[$class];
$this->_lang = null;
}
}
// Cast to string if it is a string
if ($this->_lang or !$this->_datatype or $this->_datatype == 'http://www.w3.org/2001/XMLSchema#string') {
settype($this->_value, 'string');
}
}
/**
* Formats a sparql query clause for limiting the search to specific concept types.
* @param array $types limit search to concepts of the given type(s)
* @param string $arrayClass the URI for thesaurus array class, or null if not used
* @return string sparql query clause
*/
protected function formatTypes($types, $arrayClass)
{
$unprefixed_types = array();
$type = '';
if (!empty($types)) {
foreach ($types as $type) {
$unprefixed_types[] = EasyRdf_Namespace::expand($type);
}
}
// extra types to query, if using thesaurus arrays and no additional type restrictions have been applied
$extratypes = $arrayClass && $types === array('skos:Concept') ? "UNION { ?s a <{$arrayClass}> }" : "";
if (sizeof($unprefixed_types) === 1) {
$type = '<' . $unprefixed_types[0] . '>';
} else {
// multiple type limitations require setting a UNION for each of those
$type = '[]';
foreach ($unprefixed_types as $utype) {
$extratypes .= "\nUNION { ?s a <{$utype}> }";
}
}
return "{ ?s rdf:type {$type} } UNION { ?s a isothes:ConceptGroup } {$extratypes}";
}
/** Constructor for creating a new literal
*
* @param string $value The value of the literal
* @param string $lang The natural language of the literal or null (e.g. 'en')
* @param string $datatype The datatype of the literal or null (e.g. 'xsd:string')
* @return object EasyRdf_Literal
*/
public function __construct($value, $lang = null, $datatype = null)
{
$this->value = $value;
$this->lang = $lang ? $lang : null;
$this->datatype = $datatype ? $datatype : null;
if ($this->datatype) {
if (is_object($this->datatype)) {
// Convert objects to strings
$this->datatype = strval($this->datatype);
} else {
// Expand shortened URIs (CURIEs)
$this->datatype = EasyRdf_Namespace::expand($this->datatype);
}
// Literals can not have both a language and a datatype
$this->lang = null;
} else {
// Set the datatype based on the subclass
$class = get_class($this);
if (isset(self::$classMap[$class])) {
$this->datatype = self::$classMap[$class];
$this->lang = null;
}
}
// Cast value to string
settype($this->value, 'string');
}
/** Constructor for creating a new literal
*
* @param string $value The value of the literal
* @param string $lang The natural language of the literal or null (e.g. 'en')
* @param string $datatype The datatype of the literal or null (e.g. 'xsd:string')
* @return object EasyRdf_Literal
*/
public function __construct($value, $lang = null, $datatype = null)
{
$this->value = $value;
$this->lang = $lang ? $lang : null;
$this->datatype = $datatype ? $datatype : null;
if ($this->datatype) {
if (is_object($this->datatype)) {
// Convert objects to strings
$this->datatype = strval($this->datatype);
} else {
// Expand shortened URIs (CURIEs)
$this->datatype = EasyRdf_Namespace::expand($this->datatype);
}
// Literals can not have both a language and a datatype
$this->lang = null;
} else {
// Set the datatype based on the subclass
$class = get_class($this);
if (isset(self::$classMap[$class])) {
$this->datatype = self::$classMap[$class];
$this->lang = null;
}
}
if (is_float($this->value)) {
// special handling of floats, as they suffer from locale [mis]configuration
$this->value = rtrim(sprintf('%F', $this->value), '0');
} else {
// Cast value to string
settype($this->value, 'string');
}
}
public function testExpandNonString()
{
$this->setExpectedException('InvalidArgumentException');
EasyRdf_Namespace::expand($this);
}
/** Check if a resource is of the specified type
*
* @param string $type The type to check (e.g. foaf:Person)
* @return boolean True if resource is of specified type.
*/
public function is_a($type)
{
$type = EasyRdf_Namespace::expand($type);
foreach ($this->all('rdf:type') as $t) {
if ($t->getUri() == $type) {
return true;
}
}
return false;
}
