From f0510d2f90467de8e8f260b47d79a9baaf9bef17 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Thu, 17 Sep 2009 07:15:29 +0200
Subject: Start tracking XSD with git

---
 examples/cxx/tree/xpath/driver.cxx | 137 +++++++++++++++++++++++++++++++++++++
 1 file changed, 137 insertions(+)
 create mode 100644 examples/cxx/tree/xpath/driver.cxx

(limited to 'examples/cxx/tree/xpath/driver.cxx')

diff --git a/examples/cxx/tree/xpath/driver.cxx b/examples/cxx/tree/xpath/driver.cxx
new file mode 100644
index 0000000..b55037b
--- /dev/null
+++ b/examples/cxx/tree/xpath/driver.cxx
@@ -0,0 +1,137 @@
+// file      : examples/cxx/tree/xpath/driver.cxx
+// author    : Boris Kolpackov <boris@codesynthesis.com>
+// copyright : not copyrighted - public domain
+
+#include <memory>   // std::auto_ptr
+#include <string>
+#include <fstream>
+#include <iostream>
+
+#include <xercesc/dom/DOM.hpp>
+
+#include <xqilla/xqilla-dom3.hpp>
+
+#include <xsd/cxx/xml/string.hxx>       // xml::string, xml::transcode
+
+#include "dom-parse.hxx"
+
+#include "people.hxx"
+
+using namespace std;
+using namespace xercesc;
+namespace xml = xsd::cxx::xml;
+
+int
+main (int argc, char* argv[])
+{
+  if (argc != 2)
+  {
+    cerr << "usage: " << argv[0] << " people.xml" << endl;
+    return 1;
+  }
+
+  int r (0);
+
+  // Initialise Xerces-C++ and XQilla.
+  //
+  XQillaPlatformUtils::initialize();
+
+  // Get the XQilla DOMImplementation object with support for XPath.
+  //
+  DOMImplementation* impl (
+    DOMImplementationRegistry::getDOMImplementation(
+      xml::string ("XPath2 3.0").c_str ()));
+
+  try
+  {
+    using namespace people;
+
+    ifstream ifs;
+    ifs.exceptions (ifstream::badbit | ifstream::failbit);
+    ifs.open (argv[1]);
+
+    // Parse the XML file to DOM using the XQilla DOMImplementation.
+    //
+    xml_schema::dom::auto_ptr<xercesc::DOMDocument> dom (
+      parse (ifs, argv[1], true, impl));
+
+    // Parse the DOM document to the object model. We also request that
+    // the DOM document to be associated with the object model.
+    //
+    std::auto_ptr<directory> d (
+      directory_ (dom,
+                  xml_schema::flags::keep_dom | xml_schema::flags::own_dom));
+
+    // Obtain the root element and document corresponding to the
+    // directory object.
+    //
+    DOMElement* root (static_cast<DOMElement*> (d->_node ()));
+    DOMDocument* doc (root->getOwnerDocument ());
+
+    // Obtain namespace resolver.
+    //
+    xml_schema::dom::auto_ptr<DOMXPathNSResolver> resolver (
+      doc->createNSResolver (root));
+
+    // Set the namespace prefix for the people namespace that we can
+    // use reliably in XPath expressions regardless of what is used
+    // in XML documents.
+    //
+    resolver->addNamespaceBinding (
+      xml::string ("p").c_str (),
+      xml::string ("http://www.codesynthesis.com/people").c_str ());
+
+    // Create XPath expression.
+    //
+    xml_schema::dom::auto_ptr<DOMXPathExpression> expr (
+      doc->createExpression (
+        xml::string ("p:directory/person[age > 30]").c_str (),
+        resolver.get ()));
+
+    // Execute the query.
+    //
+    xml_schema::dom::auto_ptr<DOMXPathResult> r (
+      expr->evaluate (doc, DOMXPathResult::ITERATOR_RESULT_TYPE, 0));
+
+    // Iterate over the result.
+    //
+    cout << "Records matching the query:" << endl;
+
+    while (r->iterateNext ())
+    {
+      DOMNode* n (r->getNodeValue ());
+
+      // Obtain the object model node corresponding to this DOM node.
+      //
+      person* p (
+        static_cast<person*> (
+          n->getUserData (xml_schema::dom::tree_node_key)));
+
+      // Print the data using the object model.
+      //
+      cout << endl
+           << "First  : " << p->first_name () << endl
+           << "Last   : " << p->last_name () << endl
+           << "Gender : " << p->gender () << endl
+           << "Age    : " << p->age () << endl;
+    }
+  }
+  catch(const DOMException& e)
+  {
+    cerr << xml::transcode<char> (e.getMessage ()) << std::endl;
+    r = 1;
+  }
+  catch (const xml_schema::exception& e)
+  {
+    cerr << e << endl;
+    r = 1;
+  }
+  catch (const std::ios_base::failure&)
+  {
+    cerr << argv[1] << ": unable to open or read failure" << endl;
+    r = 1;
+  }
+
+  XQillaPlatformUtils::terminate();
+  return r;
+}
-- 
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