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#include "ruby_libxml.h"
#include "ruby_xml_schema.h"
/*
* Document-class: LibXML::XML::Schema
*
* The XML::Schema class is used to prepare XML Schemas for validation of xml
* documents.
*
* Schemas can be created from XML documents, strings 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)
*/
VALUE cXMLSchema;
static void rxml_schema_free(xmlSchemaPtr xschema)
{
xmlSchemaFree(xschema);
}
/*
* call-seq:
* XML::Schema.initialize(schema_uri) -> schema
*
* Create a new schema from the specified URI.
*/
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);
}
/*
* call-seq:
* XML::Schema.document(document) -> schema
*
* Create a new schema from the specified document.
*/
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);
return Data_Wrap_Struct(cXMLSchema, NULL, rxml_schema_free, xschema);
}
/*
* call-seq:
* XML::Schema.string("schema_data") -> "value"
*
* Create a new schema using the specified string.
*/
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);
}
void rxml_init_schema(void)
{
cXMLSchema = rb_define_class_under(mXML, "Schema", rb_cObject);
rb_define_singleton_method(cXMLSchema, "new", rxml_schema_init_from_uri, 1);
rb_define_singleton_method(cXMLSchema, "from_string", rxml_schema_init_from_string, 1);
rb_define_singleton_method(cXMLSchema, "document", rxml_schema_init_from_document, 1);
}
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