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Diffstat (limited to 'examples/cxx/parser/wildcard/driver.cxx')
| -rw-r--r-- | examples/cxx/parser/wildcard/driver.cxx | 359 |
1 files changed, 359 insertions, 0 deletions
diff --git a/examples/cxx/parser/wildcard/driver.cxx b/examples/cxx/parser/wildcard/driver.cxx new file mode 100644 index 0000000..aed2560 --- /dev/null +++ b/examples/cxx/parser/wildcard/driver.cxx @@ -0,0 +1,359 @@ +// file : examples/cxx/parser/wildcard/driver.cxx +// author : Boris Kolpackov <boris@codesynthesis.com> +// copyright : not copyrighted - public domain + +#include <string> +#include <memory> +#include <iostream> + +#include "email-pskel.hxx" + +#ifndef XSDE_REUSE_STYLE_TIEIN +# error this example requires the tiein parser reuse support +#endif + +using namespace std; +using xml_schema::ro_string; + +namespace email +{ + class binary_pimpl: public binary_pskel + { + public: + binary_pimpl () + : binary_pskel (&base_impl_) + { + } + + virtual void + name (const string& n) + { + cerr << "binary: " << n << endl; + } + + virtual void + mime (const string& t) + { + cerr << "type: " << t << endl; + } + + virtual void + post_binary () + { + std::auto_ptr<xml_schema::buffer> buf (post_base64_binary ()); + + cerr << "size: " << buf->size () << endl + << endl; + } + + private: + xml_schema::base64_binary_pimpl base_impl_; + }; + + class envelope_pimpl: public envelope_pskel + { + public: + envelope_pimpl (xml_schema::unsigned_int_pskel& uint_p, + xml_schema::string_pskel& string_p, + binary_pskel& binary_p) + : depth_ (0), + uint_p_ (uint_p), string_p_ (string_p), binary_p_ (binary_p) + { + } + + virtual void + to (const string& addr) + { + cerr << "To: " << addr << endl; + } + + virtual void + from (const string& addr) + { + cerr << "From: " << addr << endl; + } + + virtual void + subject (const string& s) + { + cerr << "Subject: " << s << endl; + } + + // Wildcard handling. All wildcard events are routed to the + // _start_any_element, _end_any_element, _any_attribute, and + // _any_characters functions. We can dynamically select a + // parser from the _start_any_element after which all inner + // content will be automatically routed to this parser. At + // the end we will get a call to _end_any_element in which + // we can call post(), clean up, etc. + // + // If we are not using exceptions or XML Schema validation + // is enabled then we need to check for the error condition + // and, if the (user) error was set in pre() or post(), + // also copy the error code to the context. The _error_type() + // function returns non-0 value if there an error pending. + // The _copy_error() functions copies the error state to + // the context. + // + // Finally, if the XSD runtime library was configured with + // polymorphism support, then _start_any_element has a third + // argument which is a dynamic type id that comes from xsi:type + // or substitution groups. + // + virtual void +#ifndef XSDE_POLYMORPHIC + _start_any_element (const ro_string& ns, const ro_string& name) +#else + _start_any_element (const ro_string& ns, + const ro_string& name, + const char*) +#endif + { + // We use the depth_ counter to filter out nested elements + // and attributes for the content matched by the wildcard + // but which we don't know how to handle. + // + + if (depth_++ == 0) + { + // Top-level (relative to this type) element matched by the + // any wildcard. + // + xml_schema::parser_base* p = 0; + + if (ns == "http://www.codesynthesis.com/email") + { + if (name == "text") + { + p = &string_p_; + } + else if (name == "binary") + { + p = &binary_p_; + } + + if (p != 0) + { + xml_schema::parser_context& ctx = _context (); + + p->pre (); + +#ifndef XSDE_EXCEPTIONS + if (p->_error_type ()) + { + // Propagate the error. + // + p->_copy_error (ctx); + return; + } +#endif + p->_pre_impl (ctx); + } + } + + if (p == 0) + { + cerr << "Unknown wildcard content: " << ns << "#" << name << endl; + } + } + } + + virtual void + _end_any_element (const ro_string& ns, const ro_string& name) + { + if (--depth_ == 0) + { + if (ns == "http://www.codesynthesis.com/email") + { + if (name == "text") + { + // Note that we don't call _post_impl() (corresponding to + // _pre_impl()) here. It is called automatically by the + // infrastructure. + // + + string text (string_p_.post_string ()); + +#ifndef XSDE_EXCEPTIONS + if (string_p_._error_type ()) + { + // Propagate the error. + // + string_p_._copy_error (_context ()); + return; + } +#endif + cerr << text << endl + << endl; + } + else if (name == "binary") + { + // Note that we don't call _post_impl() (corresponding to + // _pre_impl()) here. It is called automatically by the + // infrastructure. + // + + binary_p_.post_binary (); + +#ifndef XSDE_EXCEPTIONS + if (binary_p_._error_type ()) + { + // Propagate the error. + // + binary_p_._copy_error (_context ()); + return; + } +#endif + } + } + } + } + + virtual void + _any_attribute (const ro_string& ns, + const ro_string& name, + const ro_string& value) + { + if (depth_ == 0) + { + // Top-level (relative to this type) attribute matched by the + // anyAttribute wildcard. + // + if (ns == "http://www.codesynthesis.com/email" && name == "thread-id") + { + xml_schema::parser_context& ctx = _context (); + + uint_p_.pre (); + +#ifndef XSDE_EXCEPTIONS + if (uint_p_._error_type ()) + { + uint_p_._copy_error (ctx); + return; + } +#endif + + uint_p_._pre_impl (ctx); + +#if defined(XSDE_PARSER_VALIDATION) || !defined(XSDE_EXCEPTIONS) + if (ctx.error_type ()) + return; +#endif + + uint_p_._characters (value); + +#if defined(XSDE_PARSER_VALIDATION) || !defined(XSDE_EXCEPTIONS) + if (ctx.error_type ()) + return; +#endif + + uint_p_._post_impl (); + +#if defined(XSDE_PARSER_VALIDATION) || !defined(XSDE_EXCEPTIONS) + if (ctx.error_type ()) + return; +#endif + + unsigned int tid = uint_p_.post_unsigned_int (); + +#ifndef XSDE_EXCEPTIONS + if (uint_p_._error_type ()) + { + uint_p_._copy_error (ctx); + return; + } +#endif + + cerr << "Thread-id: " << tid << endl; + } + } + } + + // If we need to be able to reset and reuse the parser after + // an error then we also need to override _reset() and reset + // the parsers that are used to handle wildcards. Note that + // you always need to call _reset() from the base. + // + virtual void + _reset () + { + envelope_pskel::_reset (); + + depth_ = 0; + uint_p_._reset (); + string_p_._reset (); + binary_p_._reset (); + } + + private: + std::size_t depth_; + + // Parsers for the unsigned int, string and binary types. + // + private: + xml_schema::unsigned_int_pskel& uint_p_; + xml_schema::string_pskel& string_p_; + binary_pskel& binary_p_; + }; +} + + +int +main (int argc, char* argv[]) +{ + const char* input; + + if (argc < 2) + { + input = "STDIN"; + cerr << "XML file not specified, reading from STDIN" << endl; + } + else + input = argv[1]; + + try + { + // Construct the parser. + // + xml_schema::unsigned_int_pimpl unsigned_int_p; + xml_schema::string_pimpl string_p; + email::binary_pimpl binary_p; + email::envelope_pimpl envelope_p (unsigned_int_p, string_p, binary_p); + + binary_p.parsers (string_p, // name + string_p); // mime + + envelope_p.parsers (string_p, // to + string_p, // from + string_p); // subject + + // Parse the XML instance document. + // + xml_schema::document_pimpl doc_p ( + envelope_p, + "http://www.codesynthesis.com/email", + "message"); + + envelope_p.pre (); + + if (argc < 2) + doc_p.parse (cin); + else + doc_p.parse (argv[1]); + + envelope_p.post_envelope (); + } + catch (const xml_schema::parser_exception& e) + { + cerr << input << ":" << e.line () << ":" << e.column () << ": " + << e.text () << endl; + return 1; + } + catch (const std::ios_base::failure&) + { + cerr << input << ": unable to open or read failure" << endl; + return 1; + } + + return 0; +} |