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<? |
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|
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// ================================================================== |
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// parses pdl-file and stores result to a passed-in reference to a "PDLModel"-object |
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class PDLReader { |
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|
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// our local reference to the "PDLModel"-object |
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var $ref_PDLModel; |
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|
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var $variabletypes_patternpart; |
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|
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|
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// ------------------------------------------------------------------ |
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// parses a given pdl-file |
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function parsePdlFile($filename, &$ref_pdlmodel) { |
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|
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global $benchmark; |
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if (isset($benchmark)) { $benchmark->setMarker('parsePdlFile - begin'); } |
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|
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// debug |
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slog("PDLModel: parsePdlFile($filename)"); |
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|
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// store reference to passed-in "PDLModel"-object in classvariable |
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$this->ref_PDLModel =& $ref_pdlmodel; |
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|
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// clear all "PDLModelObject"-objects |
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$this->ref_PDLModel->pdlModelObjects = array(); |
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|
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// trigger error if pdl-file cannot be found |
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if (!file_exists($filename)) { |
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trigger_error("could not load pdl-file \"$filename\"", E_USER_ERROR); |
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} |
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|
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// build PCRE-pattern from defined variable-types in "PDLModel" |
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// for matching against these variable-types when parsing the PDL-file later |
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$this->variabletypes_patternpart = join('|', $this->ref_PDLModel->meta_VariableTypes); |
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|
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// --- |
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// pdl-parsing starts here |
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|
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// get file into array (line by line) |
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$pdl_raw = file($filename); |
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|
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// initialize array for storing temporary parsing informations |
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$ptmp = array('curlycount' => 0); |
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|
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// parse file by iterating through each line |
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while ($line = current($pdl_raw)) { |
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|
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// strip bounding whitespaces and stuff from current line |
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$line = trim($line); |
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|
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// strip comments from line |
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$line = preg_replace("/(\/\/.*)/", "", $line); |
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|
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// strip bounding whitespaces and stuff from current line |
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$line = trim($line); |
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|
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// if nothing's left (perhaps empty line), we move on to the next line |
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if (!$line) { |
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next($pdl_raw); |
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continue; |
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} |
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|
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// curlycount (counting "{"s and "}"s) |
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if ( strstr($line, '}') ) { $ptmp['curlycount']--; } |
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|
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|
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
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// 1. "main-entity" detection and parsing |
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|
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// - - - - - - - - - - - - - - - |
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// 1.1. entity "object" |
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|
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// . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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// object ready |
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if ( (isset($ptmp['modelobject'])) && ($ptmp['modelobject']['cc_start'] == $ptmp['curlycount']) ) { |
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$this->ref_PDLModel->addObject($ptmp['modelobject']['obj']->type, &$ptmp['modelobject']['obj']); |
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unset($ptmp['modelobject']); |
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} |
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|
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// . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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// object begin |
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if ( preg_match('/object type.(.+).{/', $line, $regs) ) { |
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$objecttype = $regs[1]; |
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$ptmp['modelobject']['obj'] =& new PDLModelObject($objecttype); |
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$ptmp['modelobject']['cc_start'] = $ptmp['curlycount']; |
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} |
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|
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|
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// - - - - - - - - - - - - - - - |
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// 1.2. entity "data-operation" |
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|
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// . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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// data-operation ready |
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if ( (isset($ptmp['pc']['inDataOperation'])) && ($ptmp['pc']['inDataOperation']['cc_start'] == $ptmp['curlycount']) ) { |
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$parse_result = $this->_parseEvent($ptmp['pc']['inDataOperation']['name'], $ptmp['pc']['inDataOperation']['content']); |
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$do =& new PDLModelDataOperation($parse_result[0], $parse_result[1]); |
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$this->ref_PDLModel->addDataOperation($do->name, &$do); |
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unset($ptmp['pc']['inDataOperation']); |
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} |
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|
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// . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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// inside data-operation |
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if (isset($ptmp['pc']['inDataOperation'])) { |
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$ptmp['pc']['inDataOperation']['content'] .= $line . ' '; |
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} |
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|
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// . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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// data-operation begin |
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if ( preg_match('/data operation.(.+).{/', $line, $regs) ) { |
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$operationname = $regs[1]; |
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$ptmp['pc']['inDataOperation']['flag'] = 1; |
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$ptmp['pc']['inDataOperation']['name'] = $operationname; |
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$ptmp['pc']['inDataOperation']['cc_start'] = $ptmp['curlycount']; |
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$ptmp['pc']['inDataOperation']['content'] = ""; |
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} |
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|
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|
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
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// 2. attribute detection and parsing |
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|
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// . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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// attribute ready |
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if ( (isset($ptmp['pc']['inAttribute'])) && ($ptmp['pc']['inAttribute']['cc_start'] == $ptmp['curlycount']) ) { |
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// $ptmp['modelobject']['obj']->addAttribute($this->_parseAttribute($ptmp['pc']['inAttribute']['content'])); |
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// unset($ptmp['pc']['inAttribute']); |
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} |
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|
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// . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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// attribute begin |
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if (preg_match('/^(' . $this->variabletypes_patternpart . ') (.+);$/', $line, $regs)) { |
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/* |
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$ptmp['pc']['inAttribute']['flag'] = 1; |
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$ptmp['pc']['inAttribute']['name'] = $regs[2]; |
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$ptmp['pc']['inAttribute']['cc_start'] = $ptmp['curlycount']; |
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$ptmp['pc']['inAttribute']['content'] = $line; |
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*/ |
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$ptmp['modelobject']['obj']->addAttribute($this->_parseAttribute($line)); |
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} |
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|
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|
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
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// 3. "object key (<attributename>);" detection and parsing |
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|
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// . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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// object_key ready |
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if (preg_match('/^object key \((.+)\);$/', $line, $regs)) { |
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$ptmp['modelobject']['obj']->setObjectKey($regs[1]); |
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} |
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|
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|
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
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// 4. event detection and parsing (also maps in events) |
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|
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// . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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// event ready |
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if ( (isset($ptmp['pc']['inEvent'])) && ($ptmp['pc']['inEvent']['cc_start'] == $ptmp['curlycount']) ) { |
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$ptmp['modelobject']['obj']->addEventAndOrMap($this->_parseEvent($ptmp['pc']['inEvent']['name'], $ptmp['pc']['inEvent']['content'])); |
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unset($ptmp['pc']['inEvent']); |
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} |
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|
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// . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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// inside event |
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if (isset($ptmp['pc']['inEvent'])) { |
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$ptmp['pc']['inEvent']['content'] .= $line . ' '; |
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} |
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|
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// . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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// event begin |
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if ( preg_match('/(retrieve |add|update|remove)(.*).{/', $line, $regs) ) { |
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$ptmp['pc']['inEvent']['flag'] = 1; |
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$ptmp['pc']['inEvent']['name'] = $regs[1] . $regs[2]; |
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$ptmp['pc']['inEvent']['cc_start'] = $ptmp['curlycount']; |
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$ptmp['pc']['inEvent']['content'] = ""; |
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} |
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|
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|
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// curlycount (counting "{"s and "}"s) |
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if (stristr($line, '{')) { $ptmp['curlycount']++; } |
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|
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// next line in pdl-file |
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next($pdl_raw); |
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} |
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|
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if (isset($benchmark)) { $benchmark->setMarker('parsePdlFile - end'); } |
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|
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} |
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|
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|
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// ------------------------------------------------------------------ |
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// handle different kinds of attribute-declarations here: |
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// a) "normal" ones |
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// b) including column-mapping-info |
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// c) including column-mapping- and association-info (TODO) |
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function _parseAttribute($content_raw) { |
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|
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// TODO: enhance! |
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if (preg_match('/^(' . $this->variabletypes_patternpart . ') (.+?) = (?:(.*)|(.*)\s(.*));$/', $content_raw, $regs)) { |
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if (stristr($regs[3], ' ')) { |
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$tmp_arr = split(' ', $regs[3]); |
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$regs[3] = $tmp_arr[0]; |
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$regs[4] = $tmp_arr[1]; |
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} else { |
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$regs[4] = ''; |
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} |
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} else { |
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preg_match('/^(' . $this->variabletypes_patternpart . ') (.+)()();$/', $content_raw, $regs); |
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} |
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|
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return array($regs[2], $regs[1], $regs[3], $regs[4]); |
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|
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} |
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|
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|
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// ------------------------------------------------------------------ |
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// this is intended to create column-mapping-info |
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// based on "do { ... } map { ... }" - declarations from the PDL-file |
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function _parseEvent($name, $content_raw) { |
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|
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// the "unready" sql-statement which is declared inside the "do... map..."-block |
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$return_unreadySql = ''; |
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|
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// column-mapping-info which will be built here |
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$return_map = array(); |
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|
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// examine "content_raw", get "unreadySql"- and "mapping"-info |
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if (!preg_match('/do.{.(.+).}.map.{.(.+).}./', $content_raw, $regs)) { |
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preg_match('/do.{.(.+).}./', $content_raw, $regs); |
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} |
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|
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// strip out "unready" sql-statement |
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$return_unreadySql = ''; |
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(isset($regs[1])) && ($return_unreadySql = trim($regs[1])); |
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|
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// strip out raw-content of column-mapping-info |
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$map_raw = ''; |
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(isset($regs[2])) && ($map_raw = trim($regs[2])); |
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// create mapping-hash |
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$return_map = $this->_parseEvent_Map($map_raw); |
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|
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return array($name, $return_unreadySql, $return_map); |
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|
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} |
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|
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|
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// ------------------------------------------------------------------ |
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// create the mapping-hash from "map { ... }" - declarations in the PDL-file (raw-content of column-mapping-info) |
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function _parseEvent_Map($map_raw = '') { |
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|
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// column-mapping-info which will be built here |
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$return_map = array(); |
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|
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// an array of mapping-entries |
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$map_entries = split(';', $map_raw); |
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|
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// iterate through each mapping-entry and create hash |
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// from attribute-name (as key) and column-name (as value) |
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// with both strings stripped from bounding whitespaces |
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while ($map_entry = current($map_entries)) { |
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list($attributename, $mapname) = split(' = ', $map_entry); |
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$attributename = trim($attributename); |
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$mapname = trim($mapname); |
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$return_map[$attributename] = $mapname; |
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next($map_entries); |
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} |
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|
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return $return_map; |
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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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?> |
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