[libxml++] Add dom_update_namespace example

[Kjell Ahlstedt <kjellahl src gnome org>]

commit 7fbaf2a95edd6a1f45f238e9dd5bedbb4bef18ad
Author: Mathias Lorente <mathias lorente gadz org>
Date:   Fri Oct 10 16:42:18 2014 +0200

    Add dom_update_namespace example
    
    * .gitignore: add /examples/dom_update_namespace/dom_update_namespace
    * examples/Makefile.am: Add dom_update_namespace files.
    * examples/dom_update_namespace/main.cc:
    * examples/dom_update_namespace/example1.xml:
    * examples/dom_update_namespace/example2.xml: New files. Bug #737682.

 .gitignore                                 |    1 +
 examples/Makefile.am                       |    6 +
 examples/dom_update_namespace/example1.xml |    6 +
 examples/dom_update_namespace/example2.xml |    4 +
 examples/dom_update_namespace/main.cc      |  189 ++++++++++++++++++++++++++++
 5 files changed, 206 insertions(+), 0 deletions(-)
---
diff --git a/.gitignore b/.gitignore
index 08b969a..270b5bf 100644
--- a/.gitignore
+++ b/.gitignore
@@ -51,6 +51,7 @@ stamp-h?
 /examples/dom_parser_raw/dom_parser_raw
 /examples/dom_read_write/dom_read_write
 /examples/dom_read_write/example_output.xml
+/examples/dom_update_namespace/dom_update_namespace
 /examples/dom_xinclude/dom_xinclude
 /examples/dom_xpath/dom_xpath
 /examples/dtdvalidation/dtdvalidation
diff --git a/examples/Makefile.am b/examples/Makefile.am
index d9541ca..57ebcc9 100644
--- a/examples/Makefile.am
+++ b/examples/Makefile.am
@@ -25,6 +25,7 @@ check_PROGRAMS = \
   dom_parser/dom_parser \
   dom_parser_raw/dom_parser_raw \
   dom_read_write/dom_read_write \
+  dom_update_namespace/dom_update_namespace \
   dom_xinclude/dom_xinclude \
   dom_xpath/dom_xpath \
   dtdvalidation/dtdvalidation \
@@ -43,6 +44,7 @@ check_SCRIPTS = \
   dom_parser/make_check.sh \
   dom_parser_raw/make_check.sh \
   dom_read_write/make_check.sh \
+  dom_update_namespace/make_check.sh \
   dom_xinclude/make_check.sh \
   dom_xpath/make_check.sh \
   dtdvalidation/make_check.sh \
@@ -68,6 +70,8 @@ dom_parser_raw_dom_parser_raw_SOURCES = \
   dom_parser_raw/main.cc
 dom_read_write_dom_read_write_SOURCES = \
   dom_read_write/main.cc
+dom_update_namespace_dom_update_namespace_SOURCES = \
+  dom_update_namespace/main.cc
 dom_xinclude_dom_xinclude_SOURCES = \
   dom_xinclude/main.cc
 dom_xpath_dom_xpath_SOURCES = \
@@ -117,6 +121,8 @@ dist_noinst_DATA = \
   dom_read_write/README \
   dom_read_write/example.xml \
   dom_read_write/example.dtd \
+  dom_update_namespace/example1.xml \
+  dom_update_namespace/example2.xml \
   dom_xinclude/example.xml \
   dom_xinclude/include1.txt \
   dom_xinclude/include2.xml \
diff --git a/examples/dom_update_namespace/example1.xml b/examples/dom_update_namespace/example1.xml
new file mode 100644
index 0000000..1c7ec41
--- /dev/null
+++ b/examples/dom_update_namespace/example1.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<root xmlns="http://default.namespace/root";>
+  <child>
+    <sub_child/>
+  </child>
+</root>
diff --git a/examples/dom_update_namespace/example2.xml b/examples/dom_update_namespace/example2.xml
new file mode 100644
index 0000000..5af6dfa
--- /dev/null
+++ b/examples/dom_update_namespace/example2.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ns0:root xmlns:ns0="http://default.namespace/root";>
+  <ns0:child/>
+</ns0:root>
diff --git a/examples/dom_update_namespace/main.cc b/examples/dom_update_namespace/main.cc
new file mode 100644
index 0000000..ce8037f
--- /dev/null
+++ b/examples/dom_update_namespace/main.cc
@@ -0,0 +1,189 @@
+/* Copyright (C) 2014 The libxml++ development team
+ *
+ * This file is part of libxml++.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <libxml++/libxml++.h>
+#include <iostream>
+#include <cstdlib>
+#include <exception>
+
+class Tests
+{
+  public:
+    virtual ~Tests() {}
+
+  protected:
+    template<typename RefType, typename ValueType>
+    void assert_equal(const RefType& reference, const ValueType& value, const std::string& msg);
+    template<typename RefType, typename ValueType>
+    void assert_not_equal(const RefType& reference, const ValueType& value, const std::string& msg);
+
+    template <typename RefType, typename ValueType>
+    void fail(const RefType& reference, const ValueType& value, const std::string& msg);
+};
+
+class fail_exception : public std::exception
+{
+  public:
+    fail_exception(const std::string& msg) : msg_(msg) {}
+    virtual ~fail_exception() throw() {}
+    virtual const char* what() const throw() { return msg_.c_str(); }
+
+  private:
+    std::string msg_;
+};
+
+
+////////////////////////////////////////////////////////////////////////////////
+
+class TestNamespace : public Tests
+{
+  public:
+    TestNamespace();
+    void test_create_new_node_with_default_namespace();
+    void test_create_new_node_using_existing_namespace_prefix();
+
+  private:
+    void setup(const std::string& filename);
+
+    xmlpp::Node::PrefixNsMap nsmap_;
+    xmlpp::DomParser parser_;
+    xmlpp::Node* root_;
+};
+
+
+TestNamespace::TestNamespace()
+:
+root_(0)
+{
+  nsmap_["ns0"] = "http://default.namespace/root";;
+  nsmap_["ns1"] = "http://default.namespace/child";;
+}
+
+void TestNamespace::setup(const std::string& filename)
+{
+  parser_.set_throw_messages(true);
+  parser_.set_substitute_entities(true);
+  parser_.parse_file(filename);
+
+  xmlpp::Document* document = parser_.get_document();
+  root_ = document->get_root_node();
+}
+
+void TestNamespace::test_create_new_node_with_default_namespace()
+{
+  const Glib::ustring filename = "example1.xml";
+  setup(filename);
+
+  // Check original document
+  assert_equal(1, root_->find("/ns0:root/ns0:child", nsmap_).size(),
+      "Input file should have one child in default namespace");
+  assert_equal(0, root_->find("/ns0:root/ns1:child", nsmap_).size(),
+      "Input file shouldn't have any child in alternate default namespace");
+
+  // Add child node in default namespace and check again document
+  xmlpp::Element* child = root_->add_child("child");
+  child->set_namespace_declaration(nsmap_["ns1"], "");
+
+  std::cout << "   File " << filename << " after modification" << std::endl
+            << parser_.get_document()->write_to_string_formatted() << std::endl;
+
+  // Here we should have two children nodes into two different namespaces
+  assert_equal(1, root_->find("/ns0:root/ns0:child", nsmap_).size(),
+      "Updated input file should have one child in default namespace");
+  assert_equal(1, root_->find("/ns0:root/ns1:child", nsmap_).size(),
+      "Updated input file should have one child in alternate default namespace");
+}
+
+void TestNamespace::test_create_new_node_using_existing_namespace_prefix()
+{
+  const Glib::ustring filename = "example2.xml";
+  setup(filename);
+
+  // Check original document
+  assert_equal(1, root_->find("/ns0:root/ns0:child", nsmap_).size(),
+      "Input file should have one child in root namespace");
+  assert_equal(0, root_->find("/ns0:root/ns1:child", nsmap_).size(),
+      "Input file shouldn't have any child in child namespace");
+
+  // Add child node with specific namespace and check again document
+  xmlpp::Element* child = root_->add_child("child", "ns0");
+  child->set_namespace_declaration(nsmap_["ns1"], "");
+
+  std::cout << "   File " << filename << " after modification" << std::endl
+            << parser_.get_document()->write_to_string_formatted() << std::endl;
+
+  // Here we should have two children nodes in same namespace
+  assert_equal(2, root_->find("/ns0:root/ns0:child", nsmap_).size(),
+      "Updated input file should have two children in root namespace");
+  assert_equal(0, root_->find("/ns0:root/ns1:child", nsmap_).size(),
+      "Updated input file shouldn't have any child in child namespace");
+}
+
+
+////////////////////////////////////////////////////////////////////////////////
+template <typename RefType, typename ValueType>
+void Tests::assert_equal(const RefType& reference, const ValueType& value, const std::string& msg)
+{
+  if (ValueType(reference) == value) return;
+  fail(reference, value, msg);
+}
+
+template <typename RefType, typename ValueType>
+void Tests::assert_not_equal(const RefType& reference, const ValueType& value, const std::string& msg)
+{
+  if (ValueType(reference) != value) return;
+  fail(reference, value, msg);
+}
+
+template <typename RefType, typename ValueType>
+void Tests::fail(const RefType& reference, const ValueType& value, const std::string& msg)
+{
+  std::stringstream error;
+  error << msg << " (reference: " << reference << ", found: " << value << ")";
+  throw fail_exception(error.str());
+}
+
+
+////////////////////////////////////////////////////////////////////////////////
+
+int
+main(int /* argc */, char** /* argv */)
+{
+  // Set the global C and C++ locale to the user-configured locale,
+  // so we can use std::cout with UTF-8, via Glib::ustring, without exceptions.
+  std::locale::global(std::locale(""));
+
+  TestNamespace tests;
+
+  try
+  {
+    tests.test_create_new_node_with_default_namespace();
+    tests.test_create_new_node_using_existing_namespace_prefix();
+  }
+  catch (const std::exception& ex)
+  {
+    std::cerr << "Exception caught: " << ex.what() << std::endl;
+    return EXIT_FAILURE;
+  }
+
+  return EXIT_SUCCESS;
+}