/**
*
* @param STRING $elementName
* @access private
*/
function getElementText($elementName)
{
$namespace = RDF_Util::guessNamespace($elementName);
$localName = RDF_Util::guessName($elementName);
if ($namespace == "") {
return $localName;
}
$prefix = array_search($namespace, $this->m_namespaces);
if ($prefix === false) {
$errmsg = "Prefix for element '{$elementName}' cannot be found.";
return RDF::raiseError(RDF_ERROR, null, null, $errmsg);
}
if ($prefix != RDF_NAMESPACE_PREFIX) {
return $prefix . ':' . $localName;
} else {
return $this->rdf_qname_prefix . $localName;
}
}
/**
* Add the given model to this Model_MDB.
* This function monitors for SQL errors, and will commit if no errors have occured,
* otherwise it will rollback.
* If any statement of the model to be added to this model contains a blankNode
* with an identifier already existing in this model, a new blankNode is generated.
*
* @param object Model $model
* @throw PhpError
* @access public
*/
function addModel(&$model)
{
if (!is_a($model, 'RDF_Model')) {
$errmsg = 'Model expected, got unexpected: ' . (is_object($model) ? get_class($model) : gettype($model));
return RDF::raiseError(RDF_ERROR_UNEXPECTED, null, null, $errmsg);
}
$blankNodes_tmp = array();
if (is_a($model, 'RDF_Model_Memory')) {
$this->dbConn->autoCommit(false);
foreach ($model->triples as $statement) {
$this->_addStatementFromAnotherModel($statement, $blankNodes_tmp);
}
$this->dbConn->commit();
$this->dbConn->autoCommit(true);
} elseif (is_a($model, 'RDF_Model_MDB')) {
$this->dbConn->autoCommit(false);
$Model_Memory =& $model->getMemModel();
foreach ($Model_Memory->triples as $statement) {
$this->_addStatementFromAnotherModel($statement, $blankNodes_tmp);
}
$this->dbConn->commit();
$this->dbConn->autoCommit(true);
}
}
function factory()
{
$errmsg = 'Not implemented';
return RDF::raiseError(RDF_ERROR, null, null, $errmsg);
}
/**
* Generates a new Model_Memory from a URI, a file or from memory.
* If you want to parse an RDF document, pass the URI or location in the filesystem
* of the RDF document. You can also pass RDF code direct to the function. If you pass
* RDF code directly to the parser and there is no xml:base included, you should set
* the base URI manually using the optional second parameter $rdfBaseURI.
* Make sure that here are proper namespace declarations in your input document.
*
* @access public
* @param string $base
* @param boolean $rdfBaseURI
* @return object Model_Memory
*/
function &generateModel($base, $rdfBaseURI = false)
{
// Check if $base is a URI or filename or a string containing RDF code.
if (substr(ltrim($base), 0, 1) != '<') {
// $base is URL or filename
$this->model =& new RDF_Model_Memory($base);
$input = @fopen($base, 'r');
if (!$input) {
$errmsg = "RDF Parser: Could not open File: {$base}. Stopped parsing.";
return RDF::raiseError(RDF_ERROR, null, null, $errmsg);
}
$this->rdf_parser_create(null);
$this->rdf_set_base($base);
$done = false;
while (!$done) {
$buf = fread($input, 512);
$done = feof($input);
if (!$this->rdf_parse($buf, feof($input))) {
$err_code = xml_get_error_code($this->rdf_get_xml_parser());
$line = xml_get_current_line_number($this->rdf_get_xml_parser());
$errmsg = 'XML-parser-error ' . $err_code . ' in Line ' . $line . ' of input document.';
return RDF::raiseError(RDF_ERROR, null, null, $errmsg);
}
}
/* close file. */
fclose($input);
} else {
// $base is RDF string
$this->model =& new RDF_Model_Memory();
$this->rdf_parser_create(null);
if ($rdfBaseURI !== false) {
$this->rdf_set_base($rdfBaseURI);
} else {
$this->rdf_set_base(null);
}
if (!$this->rdf_parse($base, true)) {
$err_code = xml_get_error_code($this->rdf_get_xml_parser());
$line = xml_get_current_line_number($this->rdf_get_xml_parser());
$errmsg = RDF_ERROR . '(class: parser; method: generateModel): XML-parser-error ' . $err_code . ' in Line ' . $line . ' of input document.';
return RDF::raiseError(RDF_RDQL_ERR, null, null, $errmsg);
}
}
// base_uri could have changed while parsing
$this->model->setBaseURI($this->rdf_parser['base_uri']);
$this->rdf_parser_free();
return $this->model;
}
/**
* Set the object of the triple.
*
* @access public
* @return object node
*/
function setObject($obj)
{
if (!(is_a($obj, 'RDF_Resource') or is_a($obj, 'RDF_Literal'))) {
$errmsg = 'Resource or Literal expected as object, got unexpected: ' . (is_object($obj) ? get_class($obj) : gettype($obj));
return RDF::raiseError(RDF_ERROR_UNEXPECTED, null, null, $errmsg);
}
$this->obj = $obj;
}
