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authorJörg Frings-Fürst <jff@merkur>2014-05-18 16:08:14 +0200
committerJörg Frings-Fürst <jff@merkur>2014-05-18 16:08:14 +0200
commita15cf65c44d5c224169c32ef5495b68c758134b7 (patch)
tree3419f58fc8e1b315ba8171910ee044c5d467c162 /xsd/documentation/cxx/tree/dbxml/driver.cxx
Imported Upstream version 3.3.0.2upstream/3.3.0.2
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+// 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;
+ }
+}