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sudo gem install nokogiri
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github.com/tenderlove/nokogiri

An HTML, XML, SAX, & Reader parser with the ability to search documents via XPath or CSS3 selectors… and much more

Nokogiri 鋸

Class Nokogiri::XML::Schema inherits from Object

Nokogiri::XML::Schema is used for validating XML against a schema (usually from an xsd file).

Synopsis

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

xsd = Nokogiri::XML::Schema(File.read(PO_SCHEMA_FILE))
doc = Nokogiri::XML(File.read(PO_XML_FILE))

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

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

Attributes

errors RW

Errors while parsing the schema file

Public Class Methods

from_document(p1) Show Source

Create a new Schema from the Nokogiri::XML::Document doc

static VALUE from_document(VALUE klass, VALUE document) { xmlDocPtr doc; xmlSchemaParserCtxtPtr ctx; xmlSchemaPtr schema; VALUE errors; VALUE rb_schema; Data_Get_Struct(document, xmlDoc, doc); /* In case someone passes us a node. ugh. */ doc = doc->doc; ctx = xmlSchemaNewDocParserCtxt(doc); errors = rb_ary_new(); xmlSetStructuredErrorFunc((void *)errors, Nokogiri_error_array_pusher); #ifdef HAVE_XMLSCHEMASETPARSERSTRUCTUREDERRORS xmlSchemaSetParserStructuredErrors( ctx, Nokogiri_error_array_pusher, (void *)errors ); #endif schema = xmlSchemaParse(ctx); xmlSetStructuredErrorFunc(NULL, NULL); xmlSchemaFreeParserCtxt(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; return Qnil; }
new(string_or_io) Show Source

Create a new Nokogiri::XML::Schema object using a string_or_io object.

# File lib/nokogiri/xml/schema.rb, line 36 36: def self.new string_or_io 37: from_document Nokogiri::XML(string_or_io) 38: end
read_memory(p1) Show Source

Create a new Schema from the contents of string

static VALUE read_memory(VALUE klass, VALUE content) { xmlSchemaPtr schema; xmlSchemaParserCtxtPtr ctx = xmlSchemaNewMemParserCtxt( (const char *)StringValuePtr(content), (int)RSTRING_LEN(content) ); VALUE rb_schema; VALUE errors = rb_ary_new(); xmlSetStructuredErrorFunc((void *)errors, Nokogiri_error_array_pusher); #ifdef HAVE_XMLSCHEMASETPARSERSTRUCTUREDERRORS xmlSchemaSetParserStructuredErrors( ctx, Nokogiri_error_array_pusher, (void *)errors ); #endif schema = xmlSchemaParse(ctx); xmlSetStructuredErrorFunc(NULL, NULL); xmlSchemaFreeParserCtxt(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; }

Public Instance Methods

valid?(thing) Show Source

Returns true if thing is a valid Nokogiri::XML::Document or file.

# File lib/nokogiri/xml/schema.rb, line 52 52: def valid? thing 53: validate(thing).length == 0 54: end
validate(thing) Show Source

Validate thing against this schema. thing can be a Nokogiri::XML::Document object, or a filename. An Array of Nokogiri::XML::SyntaxError objects found while validating the thing is returned.

# File lib/nokogiri/xml/schema.rb, line 45 45: def validate thing 46: thing.is_a?(Nokogiri::XML::Document) ? validate_document(thing) : validate_file(thing) 47: end