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Major changes: 

added: SAX parser support, setMetadataValue and deleteRecord methods
 modified: getMetadataValue
This commit is contained in:
tomas 2005-02-07 23:17:40 +00:00
parent 7590bbaa49
commit 5248ab23a2
1 changed files with 319 additions and 218 deletions
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537
livesupport/modules/storageServer/var/MetaData.php
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@ -23,20 +23,25 @@
Author : $Author: tomas $ Author : $Author: tomas $
Version : $Revision: 1.15 $ Version : $Revision: 1.16 $
Location : $Source: /home/paul/cvs2svn-livesupport/newcvsrepo/livesupport/modules/storageServer/var/MetaData.php,v $ Location : $Source: /home/paul/cvs2svn-livesupport/newcvsrepo/livesupport/modules/storageServer/var/MetaData.php,v $
------------------------------------------------------------------------------*/ ------------------------------------------------------------------------------*/
define('DEBUG', FALSE);
#define('DEBUG', TRUE);
define('MODIFY_LAST_MATCH', TRUE);
require_once "XML/Util.php";
/** /**
* MetaData class * MetaData class
* *
* LiveSupport file storage support class.<br> * LiveSupport file storage support class.<br>
* Store metadata tree in relational database.<br> * Store metadata tree in relational database.<br>
* <b>requires DOMXML support in PHP!</b>
* TODO: use SAX parser instead of DOMXML
* *
* @see StoredFile * @see StoredFile
* @see XmlParser
* @see DataEngine
*/ */
class MetaData{ class MetaData{
/** /**
@ -64,13 +69,13 @@ class MetaData{
* Parse and store metadata from XML file or XML string * Parse and store metadata from XML file or XML string
* *
* @param mdata string, local path to metadata XML file or XML string * @param mdata string, local path to metadata XML file or XML string
* @param loc string 'file'|'string' * @param loc string - location: 'file'|'string'
* @return true or PEAR::error * @return true or PEAR::error
*/ */
function insert($mdata, $loc='file') function insert($mdata, $loc='file')
{ {
if($this->exists) return FALSE; if($this->exists) return FALSE;
$res = $this->storeXMLDoc($mdata, $loc); $res = $this->storeDoc($mdata, $loc);
if(PEAR::isError($res)) return $res; if(PEAR::isError($res)) return $res;
switch($loc){ switch($loc){
case"file": case"file":
@ -113,7 +118,7 @@ class MetaData{
return $this->replace($mdata, $loc); return $this->replace($mdata, $loc);
/* /*
if(!$this->exists) return FALSE; if(!$this->exists) return FALSE;
$res = $this->storeXMLDoc($mdata, $loc, 'update'); $res = $this->storeDoc($mdata, $loc, 'update');
if(PEAR::isError($res)) return $res; if(PEAR::isError($res)) return $res;
$this->exists = TRUE; $this->exists = TRUE;
return TRUE; return TRUE;
@ -167,12 +172,158 @@ class MetaData{
function getMetaData() function getMetaData()
{ {
// return $this->genXMLDoc(); // obsolete // return $this->genXMLDoc(); // obsolete
if(file_exists($this->fname)) if(file_exists($this->fname)){
return file_get_contents($this->fname); $res = file_get_contents($this->fname);
else # require_once "XML/Beautifier.php";
# $fmt = new XML_Beautifier();
# $res = $fmt->formatString($res);
return $res;
}else
return "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<metadata/>\n"; return "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<metadata/>\n";
} }
/**
* Get metadata element value
*
* @param category string, metadata element name
* @param lang string, optional xml:lang value for select language version
* @param objns string, object namespace prefix - for internal use only
* @return array of matching records as hash with fields:
* <ul>
* <li>mid int, local metadata record id</li>
* <li>value string, element value</li>
* <li>attrs hasharray of element's attributes indexed by
* qualified name (e.g. xml:lang)</li>
* </ul>
* @see BasicStor::bsGetMetadataValue
*/
function getMetadataValue($category, $lang=NULL, $objns='_L')
{
// handle predicate namespace shortcut
$a = XML_Util::splitQualifiedName(strtolower($category));
if(PEAR::isError($a)) return $a;
$catNs = $a['namespace'];
$cat = $a['localPart'];
$cond = "
gunid=x'{$this->gunid}'::bigint AND objns='$objns' AND
predicate='$cat'
";
if(!is_null($catNs)) $cond .= " AND predns='$catNs'";
$sql = "
SELECT id as mid, object as value
FROM {$this->mdataTable}
WHERE $cond
ORDER BY id
";
$all = $this->dbc->getAll($sql);
if(PEAR::isError($all)) return $all;
$res = array();
// add attributes to result
foreach($all as $i=>$rec){
$pom = $this->getSubrows($rec['mid']);
if(PEAR::isError($pom)) return $pom;
$all[$i]['attrs'] = $pom['attrs'];
$atlang = $pom['attrs']['xml:lang'];
// select only matching lang (en is default)
if(
is_null($lang) ||
strtolower($lang) == strtolower($atlang) ||
(is_null($atlang) && strtolower($lang) == 'en')
){
$res[] = $all[$i];
}
}
return $res;
}
/**
* Set metadata element value
*
* @param category string, metadata element name (e.g. dc:title)
* @param value string/NULL value to store, if NULL then delete record
* @param lang string, optional xml:lang value for select language version
* @param mid int, metadata record id (OPTIONAL on unique elements)
* @return boolean
*/
function setMetadataValue($category, $value, $lang=NULL, $mid=NULL)
{
$rows = $this->getMetadataValue($category, $lang);
$aktual = NULL;
if(count($rows)>1){
if(is_null($mid)){
if(MODIFY_LAST_MATCH){ $aktual = array_pop($rows); }
else{
return PEAR::raiseError(
"MetaData::setMdataValue:".
" nonunique category, mid required"
);
}
}else{
foreach($rows as $i=>$row){
if($mid == intval($row['mid'])) $aktual = $row;
}
}
}else $aktual = $rows[0];
if(!is_null($aktual)){
if(!is_null($value)){
$sql = "
UPDATE {$this->mdataTable}
SET object='$value'
WHERE id={$aktual['mid']}
";
$res = $this->dbc->query($sql);
}else{
$res = $this->deleteRecord($aktual['mid']);
}
if(PEAR::isError($res)) return $res;
}else{
$container = $this->getMetadataValue('metadata', NULL, '_blank');
if(PEAR::isError($container)) return $container;
$id = $container[0]['mid'];
if(is_null($id)){
return PEAR::raiseError(
"MetaData::setMdataValue: metadata container not found"
);
}
$a = XML_Util::splitQualifiedName(strtolower($category));
if(PEAR::isError($a)) return $a;
$catNs = $a['namespace'];
$cat = $a['localPart'];
$nid= $this->storeRecord('_I', $id, $catNs, $cat, $predxml='T',
'_L', $value);
if(PEAR::isError($nid)) return $nid;
if(!is_null($lang)){
$res= $this->storeRecord('_I', $nid, 'xml', 'lang', $predxml='A',
'_L', $lang);
if(PEAR::isError($res)) return $res;
}
}
return TRUE;
}
/**
* Regenerate XML metadata file after category value change
*
* @return boolean
*/
function regenerateXmlFile()
{
$fn = $this->fname;
$xml = $this->genXMLDoc();
if (!$fh = fopen($fn, 'w')) {
return PEAR::raiseError(
"MetaData::regenerateXmlFile: cannot open for write ($fn)"
);
}
if(fwrite($fh, $xml) === FALSE) {
return PEAR::raiseError(
"MetaData::regenerateXmlFile: write error ($fn)"
);
}
fclose($fh);
return TRUE;
}
/** /**
* Contruct filepath of metadata file * Contruct filepath of metadata file
* *
@ -215,53 +366,44 @@ class MetaData{
* Parse and insert or update metadata XML to database * Parse and insert or update metadata XML to database
* *
* @param mdata string, local path to metadata XML file or XML string * @param mdata string, local path to metadata XML file or XML string
* @param loc string 'file'|'string' * @param loc string, location: 'file'|'string'
* @param mode string 'insert'|'update'
* @return true or PEAR::error * @return true or PEAR::error
*/ */
function storeXMLDoc($mdata='', $loc='file', $mode='insert') function storeDoc($mdata='', $loc='file')
{ {
switch($loc){ switch($loc){
case"file": case"file":
if(!is_file($mdata)){ if(!is_file($mdata)){
return PEAR::raiseError( return PEAR::raiseError(
"MetaData::storeXMLDoc: metadata file not found ($mdata)" "MetaData::storeDoc: metadata file not found ($mdata)"
); );
} }
if(!is_readable($mdata)){ if(!is_readable($mdata)){
return PEAR::raiseError( return PEAR::raiseError(
"MetaData::storeXMLDoc: can't read metadata file ($mdata)" "MetaData::storeDoc: can't read metadata file ($mdata)"
); );
} }
$mdstr = file_get_contents($mdata); $mdata = file_get_contents($mdata);
$xml = domxml_open_mem($mdstr);
break;
case"string": case"string":
$xml = domxml_open_mem($mdata); require_once"XmlParser.php";
$parser =& new XmlParser($mdata);
if($parser->isError()){
return PEAR::raiseError(
"MetaData::storeDoc: ".$parser->getError()
);
}
$tree = $parser->getTree();
break; break;
default: default:
return PEAR::raiseError( return PEAR::raiseError(
"MetaData::storeXMLDoc: unsupported metadata location ($loc)" "MetaData::storeDoc: unsupported metadata location ($loc)"
); );
} }
$root = $xml->document_element();
if(!is_object($root)) return PEAR::raiseError(
"MetaData::storeXMLDoc: metadata parser failed (".gettype($root).")"
);
$this->dbc->query("BEGIN"); $this->dbc->query("BEGIN");
if($mode == 'update') $this->nameSpaces = $this->readNamespaces(); $res = $this->storeNode($tree);
$res = $this->storeXMLNode($root, NULL, $mode);
if(PEAR::isError($res)){ if(PEAR::isError($res)){
$this->dbc->query("ROLLBACK"); return $res; $this->dbc->query("ROLLBACK"); return $res;
} }
foreach($this->nameSpaces as $prefix=>$uri){
$res = $this->storeRecord(
'_L', $prefix, NULL, '_namespace', 'T', '_L', $uri, $mode
);
if(PEAR::isError($res)){
$this->dbc->query("ROLLBACK"); return $res;
}
}
$res = $this->dbc->query("COMMIT"); $res = $this->dbc->query("COMMIT");
if(PEAR::isError($res)){ $this->dbc->query("ROLLBACK"); return $res; } if(PEAR::isError($res)){ $this->dbc->query("ROLLBACK"); return $res; }
return TRUE; return TRUE;
@ -270,109 +412,43 @@ class MetaData{
return $root; return $root;
} }
/**
* Read namespace definitions from database and return it as array
*
* @return array or PEAR::error
*/
function readNamespaces()
{
$nameSpaces = array();
$arr = $this->dbc->getAll("SELECT subject, object
FROM {$this->mdataTable}
WHERE gunid=x'{$this->gunid}'::bigint
AND subjns='_L'
AND predns is null AND predicate='_namespace'
AND objns='_L'
");
if(PEAR::isError($arr)) return $arr;
if(is_array($arr)){
foreach($arr as $i=>$v){
$nameSpaces[$v['subject']] = $v['object'];
}
}
return $nameSpaces;
}
/** /**
* Process one node of metadata XML for insert or update.<br> * Process one node of metadata XML for insert or update.<br>
* <b>TODO: add support for other usable node types</b>
* *
* @param node DOM node object * @param node object, node in tree returned by XmlParser
* @param parid int, parent id * @param parid int, parent id
* @param mode 'insert'|'update' * @param nSpaces array of name spaces definitions
* @return * @return int, local metadata record id
*/ */
function storeXMLNode($node, $parid=NULL, $mode='insert') function storeNode($node, $parid=NULL, $nSpaces=array())
{ {
//echo $node->node_name().", ".$node->node_type().", ".$node->prefix().", $parid.\n"; //echo $node->node_name().", ".$node->node_type().", ".$node->prefix().", $parid.\n";
// preprocessing: $nSpaces = array_merge($nSpaces, $node->nSpaces);
switch($node->node_type()){ // null parid = root node of metadata tree
case 1: // element $subjns = (is_null($parid)? '_G' : '_I');
case 2: // attribute $subject = (is_null($parid)? $this->gunid : $parid);
$subjns = (is_null($parid)? '_G' : '_I'); $object = $node->content;
$subject = (is_null($parid)? $this->gunid : $parid); if(is_null($object) || $object == ''){
// DOM XML extension doesn't like empty prefix - use '_d' $objns = '_blank';
$prefix = $node->prefix(); $prefix = ($prefix === '' ? '_d' : $prefix); $object = 'NULL';
if(!isset($this->nameSpaces[$prefix])) }else $objns = '_L';
$this->nameSpaces[$prefix] = $node->namespace_uri(); $id = $this->storeRecord($subjns, $subject,
break; $node->ns, $node->name, 'T', $objns, $object);
// process attributes
foreach($node->attrs as $atn=>$ato){
$this->storeRecord('_I', $id,
$ato->ns, $ato->name, 'A', '_L', $ato->val);
} }
// main processing: // process child nodes
switch($node->node_type()){ foreach($node->children as $ch){
case 9: // document $this->storeNode($ch, $id, $nSpaces);
$this->storeXMLNode($node->document_element(), $parid, $mode);
break;
case 1: // element
if($node->is_blank_node()) break;
$id = $this->storeRecord(
$subjns, $subject, $prefix, $node->node_name(), 'T',
'_blank', NULL, $mode
);
if(PEAR::isError($id)) return $id;
if($node->has_attributes()){
foreach($node->attributes() as $attr){
$res = $this->storeXMLNode($attr, $id, $mode);
if(PEAR::isError($res)) return $res;
}
}
if($node->has_child_nodes()){
foreach($node->child_nodes() as $child){
$res = $this->storeXMLNode($child, $id, $mode);
if(PEAR::isError($res)) return $res;
}
}
break;
case 2: // attribute
$res = $this->storeRecord(
$subjns, $subject, $prefix, $node->node_name(),
'A', '_L', $node->value(), $mode
);
if(PEAR::isError($res)) return $res;
break;
case 3: // text
case 4: // cdata
# echo"T\n";
if($node->is_blank_node()) break;
$objns_sql = "'_L'";
// coalesce ... returns the first of its arguments that is not NULL
$object_sql = "coalesce(object,'')||'".$node->node_value()."'";
$res = $this->dbc->query("
UPDATE {$this->mdataTable}
SET objns=$objns_sql, object=$object_sql
WHERE id='$parid'
");
if(PEAR::isError($res)) return $res;
break;
case"5": case"6": case"7": case"8":
break;
default:
return PEAR::raiseError(
"MetaData::storeXMLNode: unsupported node type (".
$node->node_type().")"
);
} }
return TRUE; // process namespace definitions
foreach($node->nSpaces as $ns=>$uri){
$this->storeRecord('_I', $id,
'xmlns', $ns, 'N', '_L', $uri);
}
return $id;
} }
/** /**
@ -404,63 +480,66 @@ class MetaData{
* @param predns string, predicate namespace prefix, have to be defined * @param predns string, predicate namespace prefix, have to be defined
* in file's metadata (or reserved prefix) * in file's metadata (or reserved prefix)
* @param predicate string, predicate value, e.g. name of DC element * @param predicate string, predicate value, e.g. name of DC element
* @param predxml string 'T'|'A' - XML tag or attribute * @param predxml string 'T'|'A'|'N' - XML tag, attribute or NS def.
* @param objns string, object namespace prefix, have to be defined * @param objns string, object namespace prefix, have to be defined
* in file's metadata (or reserved prefix) * in file's metadata (or reserved prefix)
* @param object string, object value, e.g. title of song * @param object string, object value, e.g. title of song
* @param mode 'insert'|'update'
* @return int, new metadata record id * @return int, new metadata record id
*/ */
function storeRecord($subjns, $subject, $predns, $predicate, $predxml='T', function storeRecord($subjns, $subject, $predns, $predicate, $predxml='T',
$objns=NULL, $object=NULL, $mode='insert') $objns=NULL, $object=NULL)
{ {
//echo "$subjns, $subject, $predns, $predicate, $predxml, $objns, $object, $mode\n"; //echo "$subjns, $subject, $predns, $predicate, $predxml, $objns, $object\n";
$predns_sql = (is_null($predns) ? "NULL" : "'".strtolower($predns)."'" ); $predns_sql = (is_null($predns) ? "NULL" : "'$predns'" );
$objns_sql = (is_null($objns) ? "NULL" : "'$objns'" ); $objns_sql = (is_null($objns) ? "NULL" : "'$objns'" );
$object_sql = (is_null($object)? "NULL" : "'$object'"); $object_sql = (is_null($object)? "NULL" : "'$object'");
$predicate = strtolower($predicate); $id = $this->dbc->nextId("{$this->mdataTable}_id_seq");
$id = NULL;
if($mode == 'update'){
$cond = "gunid = x'{$this->gunid}'::bigint AND predns=$predns_sql
AND predicate='$predicate'";
if($subjns == '_I'){
$cond .= " AND subjns='_I' AND subject='$subject'";
}
$id = $this->dbc->getOne("SELECT id FROM {$this->mdataTable}
WHERE $cond");
//echo "$id, ".(is_null($id) ? 'null' : 'not null')."\n";
}
if(is_null($id)){ $mode = 'insert'; }
if($mode == 'insert'){
$id = $this->dbc->nextId("{$this->mdataTable}_id_seq");
}
if(PEAR::isError($id)) return $id; if(PEAR::isError($id)) return $id;
if($mode == 'insert'){ $res = $this->dbc->query("
$res = $this->dbc->query(" INSERT INTO {$this->mdataTable}
INSERT INTO {$this->mdataTable} (id , gunid , subjns , subject ,
(id , gunid , subjns , subject , predns , predicate , predxml ,
predns , predicate , predxml , objns , object
objns , object )
) VALUES
VALUES ($id, x'{$this->gunid}'::bigint, '$subjns', '$subject',
($id, x'{$this->gunid}'::bigint, '$subjns', '$subject', $predns_sql, '$predicate', '$predxml',
$predns_sql, '$predicate', '$predxml', $objns_sql, $object_sql
$objns_sql, $object_sql )
) ");
");
}else{
$res = $this->dbc->query("
UPDATE {$this->mdataTable}
SET subjns = '$subjns', subject = '$subject',
objns = $objns_sql, object = $object_sql
WHERE id='$id'
");
// WHERE $cond
}
if(PEAR::isError($res)) return $res; if(PEAR::isError($res)) return $res;
return $id; return $id;
} }
/**
* Delete metadata record recursively
*
* @return boolean
*/
function deleteRecord($mid)
{
$sql = "
SELECT id FROM {$this->mdataTable}
WHERE subjns='_I' AND subject='{$mid}' AND
gunid=x'{$this->gunid}'::bigint
";
$rh = $this->dbc->query($sql);
if(PEAR::isError($rh)) return $rh;
while($row = $rh->fetchRow()){
$r = $this->deleteRecord($row['id']);
if(PEAR::isError($r)) return $r;
}
$rh->free();
$sql = "
DELETE FROM {$this->mdataTable}
WHERE id={$mid} AND
gunid=x'{$this->gunid}'::bigint
";
$res = $this->dbc->query($sql);
if(PEAR::isError($res)) return $res;
return TRUE;
}
/* =========================================== XML reconstruction from db */ /* =========================================== XML reconstruction from db */
/** /**
* Generate XML document from metadata database * Generate XML document from metadata database
@ -469,7 +548,8 @@ class MetaData{
*/ */
function genXMLDoc() function genXMLDoc()
{ {
$domd =& domxml_new_xmldoc('1.0'); require_once "XML/Util.php";
$res = XML_Util::getXMLDeclaration("1.0", "UTF-8")."\n";
$row = $this->dbc->getRow(" $row = $this->dbc->getRow("
SELECT * FROM {$this->mdataTable} SELECT * FROM {$this->mdataTable}
WHERE gunid=x'{$this->gunid}'::bigint WHERE gunid=x'{$this->gunid}'::bigint
@ -477,74 +557,95 @@ class MetaData{
"); ");
if(PEAR::isError($row)) return $row; if(PEAR::isError($row)) return $row;
if(is_null($row)){ if(is_null($row)){
// return PEAR::raiseError( $node = XML_Util::createTagFromArray(array(
// "MetaData::genXMLDoc: not exists ({$this->gunid})" 'localpart'=>'none'
// ); ));
$nxn =& $domd->create_element('metadata');
$domd->append_child($nxn);
}else{ }else{
$rr = $this->genXMLNode($domd, $domd, $row); $node = $this->genXMLNode($row);
if(PEAR::isError($rr)) return $rr; if(PEAR::isError($node)) return $node;
} }
//return preg_replace("|</([^>]*)>|", "</\\1>\n", $domd->dump_mem())."\n"; $res .= $node;
return $domd->dump_mem(TRUE, 'UTF-8'); require_once "XML/Beautifier.php";
$fmt = new XML_Beautifier();
$res = $fmt->formatString($res);
return $res;
} }
/** /**
* Generate XML element from database * Generate XML element from database
* *
* @param domd DOM document object * @param row array, hash with metadata record fields
* @param xn DOM element object * @return string, XML serialization of node
* @param row array, database row with values for created element
* @return void
*/ */
function genXMLNode(&$domd, &$xn, $row) function genXMLNode($row)
{ {
if($row['predxml']=='T'){ if(DEBUG) echo"genXMLNode:\n";
$nxn =& $domd->create_element($row['predicate']); if(DEBUG) var_dump($row);
}else{ extract($row);
$nxn =& $domd->create_attribute($row['predicate'], ''); $arr = $this->getSubrows($id);
} if(PEAR::isError($arr)) return $arr;
$xn->append_child($nxn); if(DEBUG) var_dump($arr);
$uri = $this->dbc->getOne(" extract($arr);
SELECT object FROM {$this->mdataTable} $node = XML_Util::createTagFromArray(array(
WHERE gunid=x'{$this->gunid}'::bigint AND predicate='_namespace' 'namespace' => $predns,
AND subjns='_L' AND subject='{$row['predns']}' 'localPart' => $predicate,
"); 'attributes'=> $attrs,
if(!is_null($uri) && $uri !== ''){ # 'content' => $object." X ".$children,
$root =& $domd->document_element(); 'content' => ($object == 'NULL' ? $children : $object),
if($row['predns'] === '') $row['predns']='_d'; ), FALSE);
$root->add_namespace($uri, $row['predns']); return $node;
$nxn->set_namespace($uri, $row['predns']);
}
if($row['object'] != 'NULL'){
$tn =& $domd->create_text_node($row['object']);
$nxn->append_child($tn);
}
$this->genXMLTree($domd, $nxn, $row['id']);
} }
/** /**
* Generate XML subtree from database * Return values of attributes, child nodes and namespaces for
* one metadata record
* *
* @param domd DOM document object * @param parid int, local id of parent metadata record
* @param xn DOM element object * @return hash with three fields:
* @param parid parent id * - attr hash, attributes
* @return void * - children array, child nodes
* - nSpaces hash, namespace definitions
*/ */
function genXMLTree(&$domd, &$xn, $parid) function getSubrows($parid)
{ {
$qh = $this->dbc->query(" if(DEBUG) echo" getSubrows:\n";
SELECT * FROM {$this->mdataTable} $qh = $this->dbc->query($q = "
WHERE gunid=x'{$this->gunid}'::bigint AND subjns='_I' SELECT
AND subject='$parid' id, predxml, predns, predicate, objns,
coalesce(object, 'NULL')as object
FROM {$this->mdataTable}
WHERE
subjns='_I' AND subject='$parid' AND
gunid=x'{$this->gunid}'::bigint
ORDER BY id ORDER BY id
"); ");
if(PEAR::isError($qh)) return $qh; if(PEAR::isError($qh)) return $qh;
$attrs = array();
$children = array();
$nSpaces = array();
if(DEBUG) echo " #=".$qh->numRows()."\n$q\n";
while($row = $qh->fetchRow()){ while($row = $qh->fetchRow()){
$this->genXMLNode($domd, $xn, $row); if(DEBUG) var_dump($row);
extract($row);
switch($predxml){
case"N":
$nSpaces["$predicate"] = $object;
case"A":
$sep=':';
if($predns=='' || $predicate=='') $sep='';
$attrs["{$predns}{$sep}{$predicate}"] = $object;
break;
case"T":
$children[] = $this->genXMLNode($row);
break;
default:
return PEAR::raiseError(
"MetaData::getSubrows: unknown predxml ($predxml)");
} // switch
} }
$qh->free(); $qh->free();
$children = join(" ", $children);
return compact('attrs', 'children', 'nSpaces');
} }
/* ========================================================= test methods */ /* ========================================================= test methods */