mirror of
https://github.com/cookiengineer/audacity
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199 lines
6.9 KiB
C
199 lines
6.9 KiB
C
/* -*- Mode: c; c-basic-offset: 2 -*-
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*
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* rdf_model_internal.h - Internal RDF Model 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_MODEL_INTERNAL_H
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#define LIBRDF_MODEL_INTERNAL_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct librdf_model_s {
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librdf_world *world;
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/* usage: usage count of this instance
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*
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* Used by other redland classes such as iterator, stream
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* via librdf_model_add_reference librdf_model_remove_reference
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* The usage count of model after construction is 1.
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*/
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int usage;
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/* sub_models: list of sub librdf_model* */
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librdf_list* sub_models;
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/* supports_contexts : does the storage model support redland contexts? */
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int supports_contexts;
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/* context : model implementation user data */
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void *context;
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struct librdf_model_factory_s* factory;
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};
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/* A Model Factory */
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struct librdf_model_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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model-specific register function */
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size_t context_length;
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/* init the factory */
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void (*init)(void);
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/* terminate the factory */
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void (*terminate)(void);
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/* create a new model */
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int (*create)(librdf_model* model, librdf_storage* storage, librdf_hash* options);
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/* copy a model */
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/* clone is assumed to do leave the new model in the same state
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* after an init() method on an existing model - i.e ready to
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* use but closed.
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*/
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librdf_model* (*clone)(librdf_model* new_model);
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/* destroy model */
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void (*destroy)(librdf_model* model);
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/* return the number of statements in the model for model */
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int (*size)(librdf_model* model);
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/* add a statement to the model from the given model */
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int (*add_statement)(librdf_model* model, librdf_statement* statement);
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/* add a statement to the model from the given model */
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int (*add_statements)(librdf_model* model, librdf_stream* statement_stream);
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/* remove a statement from the model */
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int (*remove_statement)(librdf_model* model, librdf_statement* statement);
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/* check if statement in model */
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int (*contains_statement)(librdf_model* model, librdf_statement* statement);
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/* check for [node, property, ?] */
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int (*has_arc_in)(librdf_model *model, librdf_node *node, librdf_node *property);
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/* check for [?, property, node] */
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int (*has_arc_out)(librdf_model *model, librdf_node *node, librdf_node *property);
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/* serialise the model in model */
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librdf_stream* (*serialise)(librdf_model* model);
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/* serialise the results of a query */
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librdf_stream* (*find_statements)(librdf_model* model, librdf_statement* statement);
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librdf_stream* (*find_statements_with_options)(librdf_model* model, 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* (*get_sources)(librdf_model* model, 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* (*get_arcs)(librdf_model* model, 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* (*get_targets)(librdf_model* model, 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_model *model, librdf_node *node);
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librdf_iterator* (*get_arcs_out)(librdf_model *model, librdf_node *node);
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/* add a statement to the model from the context */
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int (*context_add_statement)(librdf_model* model, librdf_node* context, librdf_statement *statement);
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/* remove a statement from the context */
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int (*context_remove_statement)(librdf_model* model, librdf_node* context, librdf_statement *statement);
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/* list statements in a context */
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librdf_stream* (*context_serialize)(librdf_model* model, librdf_node* context);
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/* query the model */
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librdf_query_results* (*query_execute)(librdf_model* model, librdf_query* query);
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/* sync the model to the storage - OPTIONAL */
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int (*sync)(librdf_model* model);
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/* add a statement from the context - OPTIONAL (librdf_model will
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* implement using context_add_statement if missing)
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*/
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int (*context_add_statements)(librdf_model* model, librdf_node* context, librdf_stream *stream);
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/* remove a statement from the context - OPTIONAL (librdf_model will
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* implement using context_remove_statement if missing)
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*/
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int (*context_remove_statements)(librdf_model* model, librdf_node* context);
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/* get the single storage for this model if there is one - OPTIONAL */
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librdf_storage* (*get_storage)(librdf_model* model);
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/* search for statement in a context - OPTIONAL (rdf_model 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_model* model, 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_model* model);
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/* features - OPTIONAL */
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librdf_node* (*get_feature)(librdf_model* model, librdf_uri* feature);
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int (*set_feature)(librdf_model* model, librdf_uri* feature, librdf_node* value);
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/* transactions - OPTIONAL */
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int (*transaction_start)(librdf_model* model);
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int (*transaction_start_with_handle)(librdf_model* model, void* handle);
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int (*transaction_commit)(librdf_model* model);
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int (*transaction_rollback)(librdf_model* model);
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void* (*transaction_get_handle)(librdf_model* model);
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};
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/* module init */
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void librdf_init_model(librdf_world *world);
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/* module terminate */
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void librdf_finish_model(librdf_world *world);
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/* class methods */
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void librdf_model_register_factory(librdf_world *world, const char *name, const char *label, void (*factory) (librdf_model_factory*));
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librdf_model_factory* librdf_get_model_factory(librdf_world* world, const char *name);
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void librdf_model_add_reference(librdf_model *model);
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void librdf_model_remove_reference(librdf_model *model);
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/* model storage factory initialise (the only model factory at present) */
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void librdf_init_model_storage(librdf_world *world);
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#ifdef __cplusplus
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}
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#endif
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#endif
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