Class: LibXML::XML::Schema

Inherits:
Object
  • Object
show all
Defined in:
ext/libxml/ruby_xml_schema.c,
lib/libxml/schema.rb,
ext/libxml/ruby_xml_schema.c

Overview

The XML::Schema class is used to prepare XML Schemas for validation of xml documents.

Schemas can be created from XML documents, strinings or URIs using the corresponding methods (new for URIs).

Once a schema is prepared, an XML document can be validated by the XML::Document#validate_schema method providing the XML::Schema object as parameter. The method return true if the document validates, false otherwise.

Basic usage:

# parse schema as xml document
schema_document = XML::Document.file('schema.rng')

# prepare schema for validation
schema = XML::Schema.document(schema_document)

# parse xml document to be validated
instance = XML::Document.file('instance.xml')

# validate
instance.validate_schema(schema)

Defined Under Namespace

Modules: Types Classes: Attribute, Element, Facet, Namespaces, Type

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.cached(location) ⇒ Object 



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# File 'lib/libxml/schema.rb', line 61

def self.cached(location)
  @_schemas ||= {}
  @_schemas[location] ||= new(location)
end

.XML::Schema.document(document) ⇒ Object

Create a new schema from the specified document.



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# File 'ext/libxml/ruby_xml_schema.c', line 80

static VALUE rxml_schema_init_from_document(VALUE class, VALUE document)
{
  xmlDocPtr xdoc;
  xmlSchemaPtr xschema;
  xmlSchemaParserCtxtPtr xparser;

  Data_Get_Struct(document, xmlDoc, xdoc);

  xparser = xmlSchemaNewDocParserCtxt(xdoc);
  xschema = xmlSchemaParse(xparser);
  xmlSchemaFreeParserCtxt(xparser);

  if (xschema == NULL)
    return Qnil;

  return Data_Wrap_Struct(cXMLSchema, NULL, rxml_schema_free, xschema);
}

.XML::Schema.from_string("schema_data") ⇒ Object

Create a new schema using the specified string.



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# File 'ext/libxml/ruby_xml_schema.c', line 104

static VALUE rxml_schema_init_from_string(VALUE self, VALUE schema_str)
{
  xmlSchemaParserCtxtPtr xparser;
  xmlSchemaPtr xschema;

  Check_Type(schema_str, T_STRING);

  xparser = xmlSchemaNewMemParserCtxt(StringValuePtr(schema_str), strlen(
      StringValuePtr(schema_str)));
  xschema = xmlSchemaParse(xparser);
  xmlSchemaFreeParserCtxt(xparser);

  return Data_Wrap_Struct(cXMLSchema, NULL, rxml_schema_free, xschema);
}

.XML::Schema.initialize(schema_uri) ⇒ Object

Create a new schema from the specified URI.



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# File 'ext/libxml/ruby_xml_schema.c', line 60

static VALUE rxml_schema_init_from_uri(VALUE class, VALUE uri)
{
  xmlSchemaParserCtxtPtr xparser;
  xmlSchemaPtr xschema;

  Check_Type(uri, T_STRING);

  xparser = xmlSchemaNewParserCtxt(StringValuePtr(uri));
  xschema = xmlSchemaParse(xparser);
  xmlSchemaFreeParserCtxt(xparser);

  return Data_Wrap_Struct(cXMLSchema, NULL, rxml_schema_free, xschema);
}

Instance Method Details

#_collect_types ⇒ Object 



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# File 'ext/libxml/ruby_xml_schema.c', line 266

static VALUE rxml_schema_collect_types(VALUE self)
{
  xmlSchemaPtr xschema;

  Data_Get_Struct(self, xmlSchema, xschema);

  if(xschema){
    xmlHashScan(xschema->schemasImports, (xmlHashScanner) collectSchemaTypes, (void *)self);
  }

  return Qnil;
}

#_namespaces ⇒ Object 



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# File 'ext/libxml/ruby_xml_schema.c', line 186

static VALUE rxml_schema_namespaces(VALUE self)
{
  VALUE schemas;
  xmlSchemaPtr xschema;

  Data_Get_Struct(self, xmlSchema, xschema);

  if (rb_iv_get(self, "@namespaces") == Qnil) {
    schemas = rb_ary_new();
    rb_iv_set(self, "@namespaces", schemas);
    xmlHashScan(xschema->schemasImports, (xmlHashScanner) storeNs, (void *)self);
  }

  return rb_iv_get(self, "@namespaces");
}

#document ⇒ Object 



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# File 'ext/libxml/ruby_xml_schema.c', line 157

static VALUE rxml_schema_document(VALUE self)
{
  xmlSchemaPtr xschema;

  Data_Get_Struct(self, xmlSchema, xschema);

  return rxml_node_wrap(xmlDocGetRootElement(xschema->doc));
}

#elements ⇒ Object 



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# File 'ext/libxml/ruby_xml_schema.c', line 243

static VALUE rxml_schema_elements(VALUE self)
{
  VALUE elements;
  xmlSchemaPtr xschema;

  Data_Get_Struct(self, xmlSchema, xschema);

  if (rb_iv_get(self, "@elements") == Qnil) {
    elements = rb_hash_new();
    rb_iv_set(self, "@elements", elements);
    xmlHashScan(xschema->elemDecl, (xmlHashScanner) storeElement, (void *)self);
  }

  return rb_iv_get(self, "@elements");
}

#id ⇒ Object 



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# File 'ext/libxml/ruby_xml_schema.c', line 147

static VALUE rxml_schema_id(VALUE self)
{
  xmlSchemaPtr xschema;

  Data_Get_Struct(self, xmlSchema, xschema);

  QNIL_OR_STRING(xschema->id)
}

#name ⇒ Object 



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# File 'ext/libxml/ruby_xml_schema.c', line 129

static VALUE rxml_schema_name(VALUE self)
{
  xmlSchemaPtr xschema;

  Data_Get_Struct(self, xmlSchema, xschema);

  QNIL_OR_STRING(xschema->name)
}

#namespaces ⇒ Object 



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# File 'lib/libxml/schema.rb', line 57

def namespaces
  Namespaces.new(_namespaces.uniq { |n| n.href })
end

#target_namespace ⇒ Object 



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# File 'ext/libxml/ruby_xml_schema.c', line 120

static VALUE rxml_schema_target_namespace(VALUE self)
{
  xmlSchemaPtr xschema;

  Data_Get_Struct(self, xmlSchema, xschema);

  QNIL_OR_STRING(xschema->targetNamespace)
}

#types ⇒ Object 



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# File 'ext/libxml/ruby_xml_schema.c', line 215

static VALUE rxml_schema_types(VALUE self)
{
  VALUE types;
  xmlSchemaPtr xschema;

  Data_Get_Struct(self, xmlSchema, xschema);

  if (rb_iv_get(self, "@types") == Qnil) {
    types = rb_hash_new();
    rb_iv_set(self, "@types", types);
    rxml_schema_collect_types(self);
    if(xschema != NULL && xschema->typeDecl != NULL)
      xmlHashScan(xschema->typeDecl, (xmlHashScanner) storeType, (void *)self);
  }

  return rb_iv_get(self, "@types");
}

#version ⇒ Object 



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# File 'ext/libxml/ruby_xml_schema.c', line 138

static VALUE rxml_schema_version(VALUE self)
{
  xmlSchemaPtr xschema;

  Data_Get_Struct(self, xmlSchema, xschema);

  QNIL_OR_STRING(xschema->version)
}