Support for schema evolution using substitution groups

New examples: hybrid/evolution/ignore and hybrid/evolution/passthrough.

1 files changed, 66 insertions, 0 deletions

diff --git a/examples/cxx/hybrid/evolution/passthrough/unknown-type-pimpl.hxx b/examples/cxx/hybrid/evolution/passthrough/unknown-type-pimpl.hxx
new file mode 100644
index 0000000..1956e2c
--- /dev/null
+++ b/examples/cxx/hybrid/evolution/passthrough/unknown-type-pimpl.hxx
@@ -0,0 +1,66 @@
+// file      : examples/cxx/hybrid/evolution/passthrough/unknown-type-pimpl.hxx
+// author    : Boris Kolpackov <boris@codesynthesis.com>
+// copyright : not copyrighted - public domain
+
+#ifndef UNKNOWN_TYPE_PIMPL_HXX
+#define UNKNOWN_TYPE_PIMPL_HXX
+
+namespace transform
+{
+  // Customized unknown_type parser implementation.
+  //
+  class unknown_type_pimpl: public unknown_type_base_pimpl
+  {
+  public:
+    virtual void
+    _pre ();
+
+    // Wildcard content callbacks. All the unknown content is routed
+    // to these functions. We use them to construct the raw XML
+    // representation of the unknown transformation.
+    //
+    virtual void
+    _start_any_element (const xml_schema::ro_string& ns,
+                        const xml_schema::ro_string& name,
+                        const char* type);
+
+    virtual void
+    _end_any_element (const xml_schema::ro_string& ns,
+                      const xml_schema::ro_string& name);
+
+    virtual void
+    _any_attribute (const xml_schema::ro_string& ns,
+                    const xml_schema::ro_string& name,
+                    const xml_schema::ro_string& value);
+
+    virtual void
+    _any_characters (const xml_schema::ro_string&);
+
+    // Low-level content callbacks. These are normally implemented by
+    // the generated parsers. However, we need to intercept them and
+    // re-route the known elements and attributes to the base parser
+    // and the unknown content to the wildcard callbacks above.
+    //
+    virtual void
+    _start_element (const xml_schema::ro_string& ns,
+                        const xml_schema::ro_string& name,
+                        const char* type);
+
+    virtual void
+    _end_element (const xml_schema::ro_string& ns,
+                      const xml_schema::ro_string& name);
+
+    virtual void
+    _attribute (const xml_schema::ro_string& ns,
+                    const xml_schema::ro_string& name,
+                    const xml_schema::ro_string& value);
+
+    virtual void
+    _characters (const xml_schema::ro_string&);
+
+  private:
+    xml::element* cur_;
+  };
+}
+
+#endif // UNKNOWN_TYPE_PIMPL_HXX