BDB XML + PHP, some questions

Question

Hello, nice to be there...
I've got some questions...
Now, im writing application in PHP and using the Berkeley DB XML.
I wrote some code, but i cant find the documentation to using Berkeley DB XML in PHP.
My code are look that, some comments to understanting...
<?php
// Version of BDBXML
print(dbxml_version());
echo "<br/>";
$con_name="container.dbdbxml";
// Initialize XmlManager
$mgr = new XmlManager();
if($mgr->existsContainer($con_name)) $mgr->removeContainer($con_name);
* Container location: C:/Documents and Settings/UserName/
$con = $mgr->createContainer($con_name);
// Opening container
$mgr->openContainer($con_name);
// Adding XML documents
$con->putDocument(1, "<base><element1>String text</element1><element2>Integer</element2></base>");
$con->putDocument(2, "<base><element1>String text 2</element1><element2>Integer 2</element2></base>");
// Iteriation adding documents
$iter = 3;
for($i=0;$i<20;$i++) {
$con->putDocument($iter, "<base><element1>String text ".$iter."</element1><element2>Integer ".$iter."</element2></base>");
++$iter;
// Documents the container
$res = $con->getAllDocuments();
$res->reset();
// Couting the elements
$count = $con->getNumDocuments(); echo "Numbers of count - documents: ".$count."<br/>";
// Listing the resultset using getAllDocuments
while($res->hasNext()) {
$value = $res->next();
$doc = $value->asDocument();
print $doc->getName()." = ".$value->asString()."<br/>";
// Listing the result set using query,
$qc = $mgr->createQueryContext();
$qc->setDefaultCollection($con_name);
$query="collection(\"container.dbdbxml\")";
$res2 = $mgr->query($query);
// Size of result set
$size = $res2->size(); echo "Size of resultset: ".$size."<br/>";
$res2->reset();
while($res2->hasNext()) {
$value = $res2->next();
$doc = $value->asDocument();
print $doc->getName()." = ".$value->asString()."<br/>";
?>
Now, I want to know those things:
*1. Can I create the Container which autoincrement names the files? Example: putDocuments(AutoIncrementname,FileDocument);*
Can I increment that in the container?
*2. How I can create relation with containers?*
For example:
Container1 -> Document1 [  <xml id="1"><name>Something</name></xml>  ]
Container2 -> ExtraDocument1 [ <base> <id>1</id> <names>Pre Name</names><relation> *" Here is relation to Container1 @ id "* </relation></base> ]
*3. Where I can find the classes for using in PHP?*
Thank You for answers and Really Sorry For My Bad English!
Edited by: user12232307 on 2010-02-11 10:32

Answer 1

Hi,
I'm not using PHP, but probably some ideas would be helpful:
1) In Java there is a XmlDocumentConfig class and its method setGenerateName(boolean). If you set it to true and provide a XmlDocumentConfig object to a putDocument() method, then DB XML will generate names for you with default prefix 'dbxml_' and the incremental numeric id (if I remember correctly), but the incremental numeric id is not guaranteed by DB XML, only that the document name will be an unique value (at least according to the documentation). You can change this prefix by providing a name of XmlDocument object that you are trying to put. Then the final name of a document will be "<your_doc_name>_id".
2) It depends what you mean by relation? Why don't just use the name of a container?
3) All that I was able to find by quick googling is http://www.oracle.com/technology/products/berkeley-db/pdf/building-php-applications-with-db-xml.pdf
Vyacheslav