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<? |
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|
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// ======================================================= |
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// things done here: |
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// - creating and loading new models |
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// - retrieve metadata about ds-objects and their keys, ds-events, db-tables, db-columns etc. from proper "PDLModelObject" |
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// - retrieve data-operations (raw "unready"-sql) |
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|
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class PDLEngine { |
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|
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// path to the pdl-files |
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var $path_pdl; |
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|
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// a hash with references to PDLModel-objects |
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var $models; |
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|
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var $object_model_map; |
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|
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|
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// ---------------------------------------------------- |
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// constructor |
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function PDLEngine($args) { |
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|
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// debugging |
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//slog("PDL: new PDL (" . join($args, ';') . ")"); |
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|
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// clear models |
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$this->models = array(); |
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$this->object_model_map = array(); |
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|
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// set pdl-path |
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if ( isset($args['path_pdl']) ) { $this->path_pdl = $args['path_pdl']; } |
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|
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// load models |
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if (isset($args['models']) && count($args['models'])) { |
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while($modelname = current($args['models'])) { |
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$this->_loadModel($modelname); |
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next($args['models']); |
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} |
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$this->_object_model_map_create(); |
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} |
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|
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} |
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|
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function _object_model_map_create() { |
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reset($this->models); |
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while($model =& current($this->models)) { |
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reset($model->pdlModelObjects); |
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while($pdlmodelobject =& current($model->pdlModelObjects)) { |
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$this->object_model_map[$pdlmodelobject->type] = $model->name; |
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next($model->pdlModelObjects); |
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} |
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next($this->models); |
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} |
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} |
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|
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|
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// ---------------------------------------------------- |
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// returns a reference to a "PDLModelObject"-object |
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// function &getPDLModelObject($objecttype, $modelname = 'main') { |
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function &getPDLObject($objecttype_ShortOrFull) { |
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|
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if (stristr($objecttype_ShortOrFull, '.')) { |
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list($modelname, $objecttype) = split('\.', $objecttype_ShortOrFull); |
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} else { |
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$objecttype = $objecttype_ShortOrFull; |
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$modelname = $this->object_model_map[$objecttype]; |
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} |
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|
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// load model if needed |
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//$this->_loadModelByObjectType($objecttype, $modelname); |
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if ( !isset($this->models[$modelname]) ) { |
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$this->_loadModel($modelname); |
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} |
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|
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// return object-reference if it exists |
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if ($this->models[$modelname]->existsObject($objecttype)) { |
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return $this->models[$modelname]->getObject($objecttype); |
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} else { |
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print("<font color=\"red\">PDLEngine->getPDLObject() failed, object \"$objecttype_ShortOrFull\" was not found in model, please check pdl-file.</font><br>"); |
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} |
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|
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} |
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|
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|
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// ---------------------------------------------------- |
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// returns a reference to a "PDLModelObject"-object |
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// function &getPDLModelObject($objecttype, $modelname = 'main') { |
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function &getPDLDataOperation($dataOperation_Full) { |
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|
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list($modelname, $operationname) = split('\.', $dataOperation_Full); |
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|
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// load model if needed |
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//$this->_loadModelByObjectType($objecttype, $modelname); |
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if ( !isset($this->models[$modelname]) ) { |
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$this->_loadModel($modelname); |
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} |
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|
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// return object-reference |
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return $this->models[$modelname]->getDataOperation($operationname); |
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|
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} |
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|
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|
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// ---------------------------------------------------- |
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// loads a model by creating a new "PDLModel"-object and passing the absolute path to the pdl-file to the constructor |
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function _loadModel($modelname) { |
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|
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// debugging |
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slog("PDL: loadModel($modelname)"); |
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|
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// instantiate new "PDLModel"-object and store reference into a new hash-entry of a local classvariable |
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$this->models[$modelname] =& new PDLModel($modelname, $this->path_pdl . $modelname . '.pdl'); |
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|
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} |
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|
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|
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// ---------------------------------------------------- |
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// returns column-metadata by given rdbms-table |
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function rdbms_getColumnMetaData($tablename) { |
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|
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print "rdbms_getColumnMetaData($tablename)<br>"; |
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|
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// HACK(s): |
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//$objecttype_full = 'main.' . ucfirst($tablename); |
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if ($objecttype_full == 'main.Users') { $objecttype_full = 'main.User'; } |
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|
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$meta_attribs = $this->_getAttributeMetaData($objecttype_full); |
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dumpVar('meta_attribs', $meta_attribs, 'html'); |
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|
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} |
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|
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|
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// ---------------------------------------------------- |
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// returns attribute-metadata by given objecttype |
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function _getAttributeMetaData($objecttype_full) { |
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$mo = $this->getPDLObject($objecttype_full); |
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return $mo->getAttributes(); |
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} |
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|
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|
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} |
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|
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?> |
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