Class: Nokogiri::XML::RelaxNG

Inherits:
NokogiriXmlSchema
  • Object
show all
Defined in:
lib/nokogiri/xml/relax_ng.rb,
lib/nokogiri/ffi/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 99

def self.from_document document
  ctx = LibXML.xmlRelaxNGNewDocParserCtxt document.document.cstruct

  errors = []

  LibXML.xmlSetStructuredErrorFunc(nil, SyntaxError.error_array_pusher(errors))
  LibXML.xmlRelaxNGSetParserStructuredErrors(
    ctx, SyntaxError.error_array_pusher(errors), nil) unless Nokogiri.is_2_6_16?

  schema_ptr = LibXML.xmlRelaxNGParse(ctx)

  LibXML.xmlSetStructuredErrorFunc(nil, nil)
  LibXML.xmlRelaxNGFreeParserCtxt(ctx) unless Nokogiri.is_2_6_16?

  if schema_ptr.null?
    error = LibXML.xmlGetLastError
    if error
      raise SyntaxError.wrap(error)
    else
      raise RuntimeError, "Could not parse document"
    end
  end

  LibXML.xmlRelaxNGFreeParserCtxt(ctx) if Nokogiri.is_2_6_16?

  schema = allocate
  schema.cstruct = LibXML::XmlRelaxNG.new schema_ptr
  schema.errors = errors
  schema
end

.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 54

def self.read_memory content
  content_copy = FFI::MemoryPointer.from_string(content)
  ctx = LibXML.xmlRelaxNGNewMemParserCtxt(content_copy, content.length)

  errors = []

  LibXML.xmlSetStructuredErrorFunc(nil, SyntaxError.error_array_pusher(errors))
  LibXML.xmlRelaxNGSetParserStructuredErrors(
    ctx, SyntaxError.error_array_pusher(errors), nil) unless Nokogiri.is_2_6_16?

  schema_ptr = LibXML.xmlRelaxNGParse(ctx)

  LibXML.xmlSetStructuredErrorFunc(nil, nil)
  LibXML.xmlRelaxNGFreeParserCtxt(ctx)

  if schema_ptr.null?
    error = LibXML.xmlGetLastError
    if error
      raise SyntaxError.wrap(error)
    else
      raise RuntimeError, "Could not parse document"
    end
  end

  schema = allocate
  schema.cstruct = LibXML::XmlRelaxNG.new schema_ptr
  schema.errors = errors
  schema
end