mirror of
https://github.com/cookiengineer/audacity
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239 lines
8.1 KiB
C
239 lines
8.1 KiB
C
/* -*- Mode: c; c-basic-offset: 2 -*-
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*
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* rdf_storage_internal.h - Internal RDF Storage definitions
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*
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* Copyright (C) 2000-2008, David Beckett http://www.dajobe.org/
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* Copyright (C) 2000-2005, University of Bristol, UK http://www.bristol.ac.uk/
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*
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* This package is Free Software and part of Redland http://librdf.org/
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*
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* It is licensed under the following three licenses as alternatives:
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* 1. GNU Lesser General Public License (LGPL) V2.1 or any newer version
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* 2. GNU General Public License (GPL) V2 or any newer version
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* 3. Apache License, V2.0 or any newer version
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*
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* You may not use this file except in compliance with at least one of
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* the above three licenses.
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*
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* See LICENSE.html or LICENSE.txt at the top of this package for the
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* complete terms and further detail along with the license texts for
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* the licenses in COPYING.LIB, COPYING and LICENSE-2.0.txt respectively.
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*
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*
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*/
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#ifndef LIBRDF_STORAGE_INTERNAL_H
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#define LIBRDF_STORAGE_INTERNAL_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** A storage object */
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struct librdf_storage_s
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{
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librdf_world *world;
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/* usage count of this instance
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* Used by other redland classes such as model, iterator, stream
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* via librdf_storage_add_reference librdf_storage_remove_reference
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* The usage count of storage after construction is 1.
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*/
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int usage;
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librdf_model *model;
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void *context;
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int index_contexts;
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struct librdf_storage_factory_s* factory;
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};
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/** A Storage Factory */
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struct librdf_storage_factory_s {
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char* name;
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char* label;
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/* the rest of this structure is populated by the
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storage-specific register function */
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size_t context_length;
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/* create a new storage */
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int (*init)(librdf_storage* storage, const char *name, librdf_hash* options);
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/* copy a storage */
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/* clone is assumed to do leave the new storage in the same state
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* after an init() method on an existing storage - i.e ready to
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* use but closed.
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*/
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int (*clone)(librdf_storage* new_storage, librdf_storage* old_storage);
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/* destroy a storage */
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void (*terminate)(librdf_storage* storage);
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/* make storage be associated with model */
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int (*open)(librdf_storage* storage, librdf_model* model);
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/* close storage/model context */
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int (*close)(librdf_storage* storage);
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/* return the number of statements in the storage for model */
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int (*size)(librdf_storage* storage);
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/* add a statement to the storage from the given model - OPTIONAL */
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int (*add_statement)(librdf_storage* storage, librdf_statement* statement);
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/* add a statement to the storage from the given model - OPTIONAL */
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int (*add_statements)(librdf_storage* storage, librdf_stream* statement_stream);
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/* remove a statement from the storage - OPTIONAL */
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int (*remove_statement)(librdf_storage* storage, librdf_statement* statement);
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/* check if statement in storage */
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int (*contains_statement)(librdf_storage* storage, librdf_statement* statement);
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/* check for [node, property, ?] */
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int (*has_arc_in)(librdf_storage *storage, librdf_node *node, librdf_node *property);
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/* check for [?, property, node] */
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int (*has_arc_out)(librdf_storage *storage, librdf_node *node, librdf_node *property);
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/* serialise the model in storage */
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librdf_stream* (*serialise)(librdf_storage* storage);
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/* serialise the results of a query */
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librdf_stream* (*find_statements)(librdf_storage* storage, librdf_statement* statement);
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/* OPTIONAL */
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librdf_stream* (*find_statements_with_options)(librdf_storage* storage, librdf_statement* statement, librdf_node* context_node, librdf_hash* options);
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/* return a list of Nodes marching given arc, target */
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librdf_iterator* (*find_sources)(librdf_storage* storage, librdf_node *arc, librdf_node *target);
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/* return a list of Nodes marching given source, target */
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librdf_iterator* (*find_arcs)(librdf_storage* storage, librdf_node *source, librdf_node *target);
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/* return a list of Nodes marching given source, target */
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librdf_iterator* (*find_targets)(librdf_storage* storage, librdf_node *source, librdf_node *target);
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/* return list of properties to/from a node */
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librdf_iterator* (*get_arcs_in)(librdf_storage *storage, librdf_node *node);
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librdf_iterator* (*get_arcs_out)(librdf_storage *storage, librdf_node *node);
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/* add a statement to the storage from the context - OPTIONAL */
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/* NOTE: if context is NULL, this MUST be equivalent to add_statement */
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int (*context_add_statement)(librdf_storage* storage, librdf_node* context, librdf_statement *statement);
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/* remove a statement from the context - OPTIONAL */
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/* NOTE: if context is NULL, this MUST be equivalent to remove_statement */
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int (*context_remove_statement)(librdf_storage* storage, librdf_node* context, librdf_statement *statement);
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/* list statements in a context - OPTIONAL */
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librdf_stream* (*context_serialise)(librdf_storage* storage, librdf_node* context);
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/* synchronise to underlying storage - OPTIONAL */
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int (*sync)(librdf_storage* storage);
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/* add statements to the context - OPTIONAL (rdf_storage will do it
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* using context_add_statement if missing)
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* NOTE: if context is NULL, this MUST be equivalent to add_statements
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*/
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int (*context_add_statements)(librdf_storage* storage, librdf_node* context, librdf_stream *stream);
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/* remove statements from the context - OPTIONAL (rdf_storage will do it
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* using context_remove_statement if missing)
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*/
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int (*context_remove_statements)(librdf_storage* storage, librdf_node* context);
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/* search for statement in a context - OPTIONAL (rdf_storage will do
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* it using find_statements if missing)
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*/
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librdf_stream* (*find_statements_in_context)(librdf_storage* storage, librdf_statement* statement, librdf_node* context_node);
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/* return an iterator of context nodes in the store - OPTIONAL
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* (returning NULL)
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*/
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librdf_iterator* (*get_contexts)(librdf_storage* storage);
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/* features - OPTIONAL */
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librdf_node* (*get_feature)(librdf_storage* storaage, librdf_uri* feature);
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int (*set_feature)(librdf_storage* storage, librdf_uri* feature, librdf_node* value);
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/* transactions - OPTIONAL */
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int (*transaction_start)(librdf_storage* storage);
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int (*transaction_start_with_handle)(librdf_storage* storage, void* handle);
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int (*transaction_commit)(librdf_storage* storage);
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int (*transaction_rollback)(librdf_storage* storage);
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void* (*transaction_get_handle)(librdf_storage* storage);
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};
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void librdf_init_storage_list(librdf_world *world);
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void librdf_init_storage_hashes(librdf_world *world);
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void librdf_init_storage_trees(librdf_world *world);
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void librdf_init_storage_file(librdf_world *world);
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#ifdef STORAGE_MYSQL
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void librdf_init_storage_mysql(librdf_world *world);
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#endif
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#ifdef STORAGE_POSTGRESQL
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void librdf_init_storage_postgresql(librdf_world *world);
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#endif
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#ifdef STORAGE_TSTORE
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void librdf_init_storage_tstore(librdf_world *world);
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#endif
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#ifdef STORAGE_SQLITE
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void librdf_init_storage_sqlite(librdf_world *world);
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#endif
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/* module init */
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void librdf_init_storage(librdf_world *world);
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/* module terminate */
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void librdf_finish_storage(librdf_world *world);
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/* class methods */
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librdf_storage_factory* librdf_get_storage_factory(librdf_world* world, const char *name);
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/* rdf_storage_sql.c */
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typedef struct
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{
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char* filename;
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const char** predicate_uri_strings;
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int predicates_count;
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/* array of char* with NULL at end - size predicates_count */
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char** values;
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} librdf_sql_config;
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librdf_sql_config* librdf_new_sql_config(librdf_world* world, const char *storage_name, const char* layout, const char* config_dir, const char** predicate_uri_strings);
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librdf_sql_config* librdf_new_sql_config_for_storage(librdf_storage* storage, const char* layout, const char* dir);
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void librdf_free_sql_config(librdf_sql_config* config);
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typedef enum {
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DBCONFIG_CREATE_TABLE_STATEMENTS,
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DBCONFIG_CREATE_TABLE_LITERALS,
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DBCONFIG_CREATE_TABLE_RESOURCES,
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DBCONFIG_CREATE_TABLE_BNODES,
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DBCONFIG_CREATE_TABLE_MODELS,
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DBCONFIG_CREATE_TABLE_LAST = DBCONFIG_CREATE_TABLE_MODELS
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} librdf_dbconfig;
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extern const char* librdf_storage_sql_dbconfig_predicates[DBCONFIG_CREATE_TABLE_LAST+2];
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#ifdef __cplusplus
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}
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#endif
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#endif
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