Class: Nokogiri::XML::RelaxNG

Inherits:
NokogiriXmlSchema
  • Object
show all
Defined in:
lib/nokogiri/xml/relax_ng.rb,
ext/nokogiri/xml_relax_ng.c

Overview

Nokogiri::XML::RelaxNG is used for validating XML against a RelaxNG schema.

Synopsis

Validate an XML document against a RelaxNG schema. Loop over the errors that are returned and print them out:

schema  = Nokogiri::XML::RelaxNG(File.open(ADDRESS_SCHEMA_FILE))
doc     = Nokogiri::XML(File.open(ADDRESS_XML_FILE))

schema.validate(doc).each do |error|
  puts error.message
end

The list of errors are Nokogiri::XML::SyntaxError objects.

Class Method Summary collapse

Class Method Details

.from_document(doc) ⇒ Object

Create a new RelaxNG schema from the Nokogiri::XML::Document doc


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# File 'ext/nokogiri/xml_relax_ng.c', line 103

static VALUE from_document(VALUE klass, VALUE document)
{
  xmlDocPtr doc;
  xmlRelaxNGParserCtxtPtr ctx;
  xmlRelaxNGPtr schema;
  VALUE errors;
  VALUE rb_schema;

  Data_Get_Struct(document, xmlDoc, doc);

  /* In case someone passes us a node. ugh. */
  doc = doc->doc;

  ctx = xmlRelaxNGNewDocParserCtxt(doc);

  errors = rb_ary_new();
  xmlSetStructuredErrorFunc((void *)errors, Nokogiri_error_array_pusher);

#ifdef HAVE_XMLRELAXNGSETPARSERSTRUCTUREDERRORS
  xmlRelaxNGSetParserStructuredErrors(
    ctx,
    Nokogiri_error_array_pusher,
    (void *)errors
  );
#endif

  schema = xmlRelaxNGParse(ctx);

  xmlSetStructuredErrorFunc(NULL, NULL);

  if(NULL == schema) {
    xmlErrorPtr error = xmlGetLastError();
    if(error)
      Nokogiri_error_raise(NULL, error);
    else
      rb_raise(rb_eRuntimeError, "Could not parse document");

    return Qnil;
  }

  rb_schema = Data_Wrap_Struct(klass, 0, dealloc, schema);
  rb_iv_set(rb_schema, "@errors", errors);

  return rb_schema;
}

.read_memory(string) ⇒ Object

Create a new RelaxNG from the contents of string


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# File 'ext/nokogiri/xml_relax_ng.c', line 56

static VALUE read_memory(VALUE klass, VALUE content)
{
  xmlRelaxNGParserCtxtPtr ctx = xmlRelaxNGNewMemParserCtxt(
      (const char *)StringValuePtr(content),
      (int)RSTRING_LEN(content)
  );
  xmlRelaxNGPtr schema;
  VALUE errors = rb_ary_new();
  VALUE rb_schema;

  xmlSetStructuredErrorFunc((void *)errors, Nokogiri_error_array_pusher);

#ifdef HAVE_XMLRELAXNGSETPARSERSTRUCTUREDERRORS
  xmlRelaxNGSetParserStructuredErrors(
    ctx,
    Nokogiri_error_array_pusher,
    (void *)errors
  );
#endif

  schema = xmlRelaxNGParse(ctx);

  xmlSetStructuredErrorFunc(NULL, NULL);
  xmlRelaxNGFreeParserCtxt(ctx);

  if(NULL == schema) {
    xmlErrorPtr error = xmlGetLastError();
    if(error)
      Nokogiri_error_raise(NULL, error);
    else
      rb_raise(rb_eRuntimeError, "Could not parse document");

    return Qnil;
  }

  rb_schema = Data_Wrap_Struct(klass, 0, dealloc, schema);
  rb_iv_set(rb_schema, "@errors", errors);

  return rb_schema;
}