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/performance/serialization.cxx | 151 ++++++++++++++++++++++++
 1 file changed, 151 insertions(+)
 create mode 100644 examples/cxx/tree/performance/serialization.cxx

(limited to 'examples/cxx/tree/performance/serialization.cxx')

diff --git a/examples/cxx/tree/performance/serialization.cxx b/examples/cxx/tree/performance/serialization.cxx
new file mode 100644
index 0000000..5ad6654
--- /dev/null
+++ b/examples/cxx/tree/performance/serialization.cxx
@@ -0,0 +1,151 @@
+// file      : examples/cxx/tree/performance/serialization.cxx
+// author    : Boris Kolpackov <boris@codesynthesis.com>
+// copyright : not copyrighted - public domain
+
+#include <memory>  // std::auto_ptr
+#include <cstddef> // std::size_t
+#include <sstream>
+#include <iostream>
+
+#include <xercesc/dom/DOM.hpp>
+#if _XERCES_VERSION >= 30000
+#  include <xercesc/dom/DOMLSOutput.hpp>
+#  include <xercesc/dom/DOMLSSerializer.hpp>
+#else
+#  include <xercesc/dom/DOMWriter.hpp>
+#endif
+#include <xercesc/dom/DOMImplementation.hpp>
+#include <xercesc/dom/DOMImplementationRegistry.hpp>
+
+#include <xercesc/framework/MemBufFormatTarget.hpp>
+
+#include <xercesc/util/XMLUniDefs.hpp>
+
+#include <xsd/cxx/xml/dom/bits/error-handler-proxy.hxx>
+#include <xsd/cxx/tree/error-handler.hxx>
+
+#include "time.hxx"
+#include "test.hxx"
+
+using namespace std;
+
+bool
+serialization (const char* file, unsigned long iter)
+{
+  try
+  {
+    using namespace xercesc;
+
+    cerr << "serialization:" << endl;
+
+    // Get the object model using the standard parsing function.
+    //
+    auto_ptr<test::root> r (
+      test::root_ (file,
+                   xml_schema::flags::dont_initialize |
+                   xml_schema::flags::dont_validate));
+
+    // Serialize it to the in-memory buffer. This makes sure the buffer
+    // pre-allocates enough memory.
+    //
+    xml_schema::namespace_infomap map;
+    map["t"].name = "test";
+    map["t"].schema = "test.xsd";
+
+    MemBufFormatTarget ft (10240);
+    test::root_ (ft, *r, map, "UTF-8",
+                 xml_schema::flags::dont_initialize |
+                 xml_schema::flags::dont_pretty_print |
+                 xml_schema::flags::no_xml_declaration);
+
+    std::size_t size (ft.getLen ());
+    cerr << "  document size:  " << size << " bytes" << endl
+         << "  iterations:     " << iter << endl;
+
+    // Create XML serializer that we are going to use in all iterations.
+    //
+    const XMLCh ls_id[] =
+      {xercesc::chLatin_L, xercesc::chLatin_S, xercesc::chNull};
+
+    DOMImplementation* impl (
+      DOMImplementationRegistry::getDOMImplementation (ls_id));
+
+    // Use the error handler implementation provided by the XSD runtime.
+    //
+    xsd::cxx::tree::error_handler<char> eh;
+    xsd::cxx::xml::dom::bits::error_handler_proxy<char> ehp (eh);
+
+#if _XERCES_VERSION >= 30000
+    xml_schema::dom::auto_ptr<DOMLSSerializer> writer (
+      impl->createLSSerializer ());
+
+    DOMConfiguration* conf (writer->getDomConfig ());
+
+    conf->setParameter (XMLUni::fgDOMErrorHandler, &ehp);
+    conf->setParameter (XMLUni::fgDOMXMLDeclaration, false);
+
+    xml_schema::dom::auto_ptr<DOMLSOutput> out (impl->createLSOutput ());
+
+    out->setByteStream (&ft);
+#else
+    // Same as above but for Xerces-C++ 2 series.
+    //
+    xml_schema::dom::auto_ptr<DOMWriter> writer (impl->createDOMWriter ());
+
+    writer->setErrorHandler (&ehp);
+    writer->setFeature (XMLUni::fgDOMXMLDeclaration, false);
+#endif
+
+    // Serialization loop.
+    //
+    os::time start;
+
+    for (unsigned long i (0); i < iter; ++i)
+    {
+      // First serialize the object model to DOM.
+      //
+      xml_schema::dom::auto_ptr<DOMDocument> doc (test::root_ (*r, map));
+
+      ft.reset ();
+
+      // Then serialize DOM to XML reusing the serializer we created above.
+      //
+#if _XERCES_VERSION >= 30000
+      writer->write (doc.get (), out.get ());
+#else
+      writer->writeNode (&ft, *doc);
+#endif
+
+      eh.throw_if_failed<xml_schema::parsing> ();
+    }
+
+    os::time end;
+    os::time time (end - start);
+
+    cerr << "  time:           " << time << " sec" << endl;
+
+    double ms (time.sec () * 1000000ULL + time.nsec () / 1000ULL);
+
+    // Calculate throughput in documents/sec.
+    //
+    double tpd ((iter / ms) * 1000000);
+    cerr << "  throughput:     " << tpd << " documents/sec" << endl;
+
+    // Calculate throughput in MBytes/sec.
+    //
+    double tpb (((size * iter) / ms) * 1000000/(1024*1024));
+    cerr << "  throughput:     " << tpb << " MBytes/sec" << endl;
+  }
+  catch (const xml_schema::exception& e)
+  {
+    cerr << e << endl;
+    return false;
+  }
+  catch (std::ios_base::failure const&)
+  {
+    cerr << "io failure" << endl;
+    return false;
+  }
+
+  return true;
+}
-- 
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