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Diffstat (limited to 'xsd/documentation/cxx/tree/dbxml/driver.cxx')
-rw-r--r-- | xsd/documentation/cxx/tree/dbxml/driver.cxx | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/xsd/documentation/cxx/tree/dbxml/driver.cxx b/xsd/documentation/cxx/tree/dbxml/driver.cxx new file mode 100644 index 0000000..56cbb4a --- /dev/null +++ b/xsd/documentation/cxx/tree/dbxml/driver.cxx @@ -0,0 +1,175 @@ +// file : examples/cxx/tree/dbxml/driver.cxx +// author : Boris Kolpackov <boris@codesynthesis.com> +// copyright : not copyrighted - public domain + +#include <memory> // std::auto_ptr +#include <string> +#include <cassert> +#include <iostream> + +#include <dbxml/DbXml.hpp> + +#include "library.hxx" + +using std::cerr; +using std::endl; +using std::string; +using std::auto_ptr; + +using namespace DbXml; +using namespace xsd::cxx; // for xml::string + +void +print_document (const string& desc, + XmlContainer container, + const string& name) +{ + XmlDocument doc (container.getDocument (name)); + + string content; + doc.getContent (content); + + cerr << endl + << desc << endl + << content << endl; +} + +int +main () +{ + try + { + using namespace library; + using xml_schema::date; + + XmlManager manager; + + { + XmlContainer container (manager.createContainer ("new.bdbxml")); + + XmlUpdateContext update_context (manager.createUpdateContext ()); + + XmlQueryContext context (manager.createQueryContext ()); + context.setNamespace ("lib", "http://www.codesynthesis.com/library"); + + + // Create a new document from an object model. + // + { + // Create a new catalog with one book. + // + catalog c; + + book b (20530902, // ISBN + "The Elements of Style", // Title + genre::reference, // Genre + "ES"); // ID + + author strunk ("William Strunk, Jr.", date (1869, 7, 1)); + strunk.died (date (1946, 9, 26)); + + b.author ().push_back (strunk); + c.book ().push_back (b); + + + // Create a new XML document. + // + XmlDocument doc (manager.createDocument ()); + doc.setName ("new.xml"); + + + // Obtain its DOM representation and add the root element. + // + xercesc::DOMDocument& dom_doc (*doc.getContentAsDOM ()); + + dom_doc.appendChild ( + dom_doc.createElementNS ( + xml::string ("http://www.codesynthesis.com/library").c_str (), + xml::string ("lib:catalog").c_str ())); + + + // Serialize the object model to the XML document. Also avoid + // re-initializing the Xerces-C++ runtime since XmlManager has + // it initialized. + // + catalog_ (dom_doc, c, xml_schema::flags::dont_initialize); + + + // Place the document into the container. + // + container.putDocument (doc, update_context); + + print_document ("after create:", container, "new.xml"); + } + + // Create an object model from a document in DB. + // + { + // Resolve the document in the container. + // + XmlDocument doc (container.getDocument ("new.xml")); + + + // Create the object model from the document's DOM. Also avoid + // re-initializing the Xerces-C++ runtime since XmlManager has + // it initialized. + // + auto_ptr<catalog> c (catalog_ (*doc.getContentAsDOM (), + xml_schema::flags::dont_initialize)); + + cerr << *c << endl; + } + + + // Lookup a document fragment. + // + + string query ("collection('new.bdbxml')/lib:catalog/book[@id='ES']"); + + // Find "The Elements of Style". + // + XmlValue v; + XmlResults results (manager.query (query, context)); + + if (results.next (v)) + { + // Create an object model from the document fragment. + // + auto_ptr<book> b ( + new book ( + *static_cast<xercesc::DOMElement*> (v.asNode ()))); + + cerr << *b << endl; + + + // Add another author, change the availability status. + // + author white ("E.B. White", date (1899, 7, 11)); + white.died (date (1985, 10, 1)); + + b->author ().push_back (white); + b->available (false); + + + // Update the document fragment from the object model. + // + *static_cast<xercesc::DOMElement*> (v.asNode ()) << *b; + + + // Update the document in the container. + // + XmlDocument doc (v.asDocument ()); + container.updateDocument (doc, update_context); + } + + print_document ("after update:", container, "new.xml"); + } + + manager.removeContainer ("new.bdbxml"); + } + catch (const std::exception& e) + { + cerr << e.what () << endl; + return 1; + } +} |