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/*
* jso.h
*
* $Id: jso.h,v 1.12.2.1 2009/04/18 21:55:12 source Exp $
*
* This file is part of the OpenLink Software Virtuoso Open-Source (VOS)
* project.
*
* Copyright (C) 1998-2006 OpenLink Software
*
* This project is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; only version 2 of the License, dated June 1991.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifndef __JSO_H
#define __JSO_H
#include "Dk.h"
#include "xmltree.h"
/* Part 1. Java Script style objects with named instances and properties. */
/* A property of a class MAY, MUST or SHOULD NOT appear in declaration of instances of the class. TBD: support for it :) */
#define JSO_OPTIONAL 11 /*!< The property is fully optional */
#define JSO_INHERITABLE 12 /*!< The property is required but it can be inherited */
#define JSO_REQUIRED 13 /*!< The property is required, it should be specified directly even if can be inherited */
#define JSO_PRIVATE 14 /*!< The property is never loaded. It's used only in C code */
#define JSO_DEPRECATED 15 /*!< The property is deprecated and should not be specified at all */
#define JSO_ANY "http://www.w3.org/2001/XMLSchema#any" /*!< Arbitrary boxed SQL value */
#define JSO_ANY_array "http://www.openlinksw.com/schemas/virtrdf#array-of-any" /*!< A vector of arbitrary boxed SQL values */
#define JSO_ANY_URI "http://www.w3.org/2001/XMLSchema#anyURI" /*!< boxed DV_UNAME in UTF-8 encoding */
#define JSO_BOOLEAN "http://www.w3.org/2001/XMLSchema#boolean" /*!< Bool as ptrlong 1 or 0 */
#define JSO_BITMASK "http://www.openlinksw.com/schemas/virtrdf#bitmask" /*!< Bitmask as ptrlong, can be loaded as OR of a list of values */
#define JSO_DOUBLE "http://www.w3.org/2001/XMLSchema#double" /*!< Double float as unboxed double */
#define JSO_INTEGER "http://www.w3.org/2001/XMLSchema#integer" /*!< Integer as ptrlong */
#define JSO_INTEGER_array "http://www.openlinksw.com/schemas/virtrdf#array-of-integer" /*!< Either a vector of DV_LONG_INTs or DV_ARRAY_OF_LONG */
#define JSO_STRING "http://www.w3.org/2001/XMLSchema#string" /*!< String, boxed DV_STRING */
#define JSO_STRING_array "http://www.openlinksw.com/schemas/virtrdf#array-of-string" /*!< A vector of DV_STRING-s */
#define JSO_FIELD_OFFSET(dt,f) (((char *)(&(((dt *)NULL)->f)))-((char *)NULL))
#define JSO_FIELD_ACCESS(dt,inst,ofs) ((dt *)(((char *)(inst)) + (ofs)))
#define JSO_FIELD_PTR(inst,fldd) JSO_FIELD_ACCESS(caddr_t,(inst),(fldd)->jsofd_byte_offset)
/*! Description of a single field of JSO class or JSO array */
typedef struct jso_field_descr_s {
const char * jsofd_property_iri; /*!< IRI for loading from RDF graphs, will be used as a predicate IRI */
const char * jsofd_local_name; /*!< Name of a field in C structure, it usually matches local part of \c jsofd_property_iri */
const char * jsofd_type; /*!< Datatype IRI that is either one of JSO_xxx preset type IRIs or an IRI of some JSO class */
int jsofd_required; /*!< One of JSO_OPTIONAL ... JSO_DEPRECATED */
ptrdiff_t jsofd_byte_offset; /*!< Byte offset of the beginning of the field from the beginning of the class instance */
struct jso_class_descr_s * jsofd_class; /*!< The backlink to the class where the field is declared */
} jso_field_descr_t;
/* Category of JSO class. This implementation supports only structures with fixed list of named fields and arrays with nonnegative integer indexes */
#define JSO_CAT_STRUCT 21 /*!< Class instances are strtuctures with fixed list of named fields */
#define JSO_CAT_ARRAY 22 /*!< Class instances are arrays with nonnegative integer indexes */
/*#define JSO_CAT_MAP 23 *!< Class instances are sets of key-value pairs with keys and values of any types */
/*! Data specific to JSO_CAT_STRUCT classes */
typedef struct jso_struct_descr_s {
size_t jsosd_sizeof; /*!< Size of an instance in bytes */
int jsosd_field_count; /*!< Number of fields, including deprecated fields */
jso_field_descr_t * jsosd_field_list; /*!< Array of field descriptions. The array may be longer than needed and have NULL pointers at the end */
dk_hash_t * jsosd_field_hash; /*!< Hashtable to get field description by jsofd_property_iri of a field */
} jso_struct_descr_t;
/*! Data specific to JSO_CAT_ARRAY classes */
typedef struct jso_array_descr_s {
const char * jsoad_member_type; /*!< Datatype IRI that is either one of JSO_xxx preset type IRIs or an IRI of some JSO class */
int jsoad_min_length; /*!< Min allowed number of elements in the instance */
int jsoad_max_length; /*!< Max allowed number of elements in the instance */
} jso_array_descr_t;
/*! Description of a JSO class */
typedef struct jso_class_descr_s {
int jsocd_cat; /*!< Class category as an JSO_CAT_xxx value */
const char * jsocd_c_typedef; /*!< Text of C typedef (say, 'struct myexample_s') */
const char * jsocd_class_iri; /*!< IRI for loading from RDF graphs, will be used as value of rdf:type property of an instance */
const char * jsocd_ns_uri; /*!< Namespace URI, it will be used for fields as well */
const char * jsocd_local_name; /*!< Local part of jsocd_class_iri */
dk_hash_t * jsocd_rttis; /*!< Hashtable to get jso_rtti_t of an instance by instance IRI */
struct {
jso_struct_descr_t sd;
jso_array_descr_t ad;
} _;
} jso_class_descr_t;
extern jso_class_descr_t jso_cd_array_of_any; /*!< JSO class 'array of any number of values' */
extern jso_class_descr_t jso_cd_array_of_string; /*!< JSO class 'array of any number of strings' */
/* State of a JSO class instance. An instance is NEW when created, FAILED if filled incorrectly, LOADED if filled correctly, DELETED when it become a memory leak */
#define JSO_STATUS_NEW 31 /*!< The instance is created but jso_pin() is not called for it */
#define JSO_STATUS_LOADED 32 /*!< jso_pin() has found no errors in the content of the instance and all referred instances and has unboxed values that should be unboxed. The result is a valid C structure */
#define JSO_STATUS_FAILED 33 /*!< jso_pin() has found errors in the content of the instance, the result is an invalid structure */
#define JSO_STATUS_DELETED 34 /*!< The instance is deleted. It stays in memory because it still can have references from other places */
/*! Run-time type info about JSO instance */
typedef struct jso_rtti_s {
void * jrtti_self; /*!< Pointer to the actual C structure that contains instance data */
caddr_t jrtti_inst_iri; /*!< Instance IRI */
jso_class_descr_t * jrtti_class; /*!< Pointer to description of the class of the instance */
int jrtti_status; /*!< Status as one of JSO_STATUS_xxx values */
#ifdef DEBUG
struct jso_rtti_s * jrtti_loop; /*!< Loop pointer to the RTTI itself: when debug code copies DV_OBJECT box, the pointer remains unchanged and points to the original rtti */
#endif
} jso_rtti_t;
/*! Initialization of JSO unit */
extern void jso_init (void);
/*! Declaration of an named constant that can be used later in loading values of JSO_BITMASK type */
extern void jso_define_const (const char *iri, ptrlong value);
/*! Initialization of an class description that can be used later in loading instances of that class */
extern void jso_define_class (jso_class_descr_t *jsocd);
/*! The function searches for an loaded instance such that { ?jinstance rdf:type ?jclass } */
extern void jso_get_cd_and_rtti (ccaddr_t jclass, ccaddr_t jinstance, jso_class_descr_t **cd_ptr, jso_rtti_t **inst_rtti_ptr, int quiet_if_deleted);
extern dk_hash_t *jso_consts; /*!< All known named constants, e.g., made by jso_define_const() */
extern dk_hash_t *jso_classes; /*!< All known JSO classes, e.g., made by jso_define_class() */
extern dk_hash_t *jso_properties; /*!< All known property names of all JSO classes, to cross-check classes for duplicate names */
extern dk_hash_t *jso_rttis_of_names; /*!< All JSO class instances of all classes, to distinguish between missing instances and type mismatches */
extern dk_hash_t *jso_rttis_of_structs; /*!< Similar to jso_rttis_of_names but keys are 'jrtti_self' structures, not instance IRIs */
/* Part 2. A small storage of triples that are not preset properties of objects. */
extern caddr_t jso_triple_add (caddr_t * qst, caddr_t jsubj, caddr_t jpred, caddr_t jobj);
extern caddr_t *jso_triple_get_objs (caddr_t * qst, caddr_t jsubj, caddr_t jpred);
extern caddr_t *jso_triple_get_subjs (caddr_t * qst, caddr_t jpred, caddr_t jobj);
#endif
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