function buildChangesetDefinition()
{
if (!file_exists($this->file_changes)) {
$this->_logError('changes file not found: ' . $this->file_changes);
return false;
}
$this->aChanges = $this->oCache->get($this->file_changes);
if (!$this->aChanges) {
$this->oLogger->logOnly('changeset definition from cache FALSE');
$this->aChanges = $this->oSchema->parseChangesetDefinitionFile($this->file_changes);
if ($this->_isPearError($this->aChanges, 'failed to parse changeset (' . $this->file_changes . ')')) {
return false;
}
// On-the fly cache writing disabled
//$this->oCache->save($this->aChanges, $this->file_changes);
} else {
$this->oLogger->logOnly('changeset definition from cache TRUE');
}
$this->_logOnly('successfully parsed the changeset');
$this->_logOnly('changeset name: ' . $this->aChanges['name']);
$this->_logOnly('changeset version: ' . $this->aChanges['version']);
$this->_logOnly('changeset comments: ' . $this->aChanges['comments']);
$this->_logOnly($this->aDefinitionNew['version'] == $this->aChanges['version'] ? 'schema and changeset versions match' : 'hmmm.. schema and changeset versions don\'t match');
$this->_logOnly($this->aChanges['constructive'] ? 'constructive changes found' : 'constructive changes not found');
$this->_logOnly($this->aChanges['destructive'] ? 'destructive changes found' : 'destructive changes not found');
return true;
}
/**
* A method to initialise the class by parsing a database XML schema file, so that
* the class will be ready to create/drop tables for the supplied schema.
*
* @todo Better handling of cache files
*
* @param string $file The name of the database XML schema file to parse for
* the table definitions.
* @param bool $useCache If true definitions are loaded from the cache file
* @return boolean True if the class was initialised correctly, false otherwise.
*/
function init($file, $useCache = true)
{
// Ensure that the schema XML file can be read
if (!is_readable($file)) {
OA::debug('Unable to read the database XML schema file: ' . $file, PEAR_LOG_ERR);
return false;
}
// Create an instance of MDB2_Schema to parse the schema file
$options = array('force_defaults' => false);
$this->oSchema =& MDB2_Schema::factory($this->oDbh, $options);
if ($useCache) {
$oCache = new OA_DB_XmlCache();
$this->aDefinition = $oCache->get($file);
$this->cached_definition = true;
} else {
$this->aDefinition = false;
}
if (!$this->aDefinition) {
$this->cached_definition = false;
// Parse the schema file
$this->aDefinition = $this->oSchema->parseDatabaseDefinitionFile($file);
if (PEAR::isError($this->aDefinition)) {
OA::debug('Error parsing the database XML schema file: ' . $file, PEAR_LOG_ERR);
return false;
}
// On-the fly cache writing disabled
//if ($useCache) {
// $oCache->save($this->aDefinition, $file);
//}
}
return true;
}
