[xsd-users] <any> and xerces cloneNode

[Ray Lischner]

I need to handle an <any> element. To make it easier, I defined a new complex type whose sole content is <any>, so I have only this type to customize. I customized the type to store the any content in a a DOMNode.
 
The default constructor stores a null pointer, of course. The copy constructor and assignment operator call cloneNode(source, true) to make a deep copy of the <any> element and its subelements. I overload operator<<(DOMElement&, MyType) to call importNode so I can copy the <any> element into the destination DOM.
 
But it doesn't work. I keep getting memory errors. I commented out all calls to release(), just to make sure I didn't have a logic error that resulted in a double-free. So I should have some memory leaks, but no other problems. Still, I get segfaults from inside cloneNode(). What am I doing wrong? (I'm still using Code Synthesis 2.3.1, with Xerces 2.7.)
 
The class looks something like this:
 
class Any : public AnyBase {
public:
   Any() : AnyBase(), any_(0) {}
  ~Any() {}
  Any(const xercesc::DOMElement& dom, xml_schema::flags f=0, xml_schema::type* c=0)
  : AnyBase(dom, f, c), any_(dom.getFirstChild())
  {}
  Any(Any const& other, xml_schema::flags f=0, xml_schema::type* c=0)
  : Any(other, f, c), any_(other.any())
  {}
  Any& operator=(Any const& other) {
    static_cast<AnyBase&>(*this) = other;
    any(other.any());
    return *this;
  }
  virtual Any* _clone(xml_schema::flags f=0, xml_schema::type* c = 0) const { return new Any(*this, f, c); }
 
  xercesc::DOMNode* any() { return any_; }
  xercesc::DOMNode const* any() const { return any_; }
  void any(xercesc::DOMNode const* any) { any_ = any ? any->cloneNode() : 0; }
private:
  xercesc::DOMNode* any_;
};
 
void operator<<(xercesc::DOMElement& e, Any& a)
{
  e << static_cast<AnyBase const&>(a);
  if (a.any() != 0) {
    xercesc::DOMNode* n = e.getOwnerDocument()->importNode(a.any());
    e.appendChild(n);
  }
}
 
Ray Lischner,
Senior Member of Technical Staff
133 National Business Pkwy, Ste 150      t. 443.539.3448
Annapolis Junction, MD 20701                c. 410.854.5170
rlischner at proteus-technologies.com         f. 443.539.3370
 
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