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/*
* Copyright (C) 2022, Red Hat, Inc
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
* Author: Carlos Garnacho <carlosg@gnome.org>
*/
#include "config.h"
#include "tracker-deserializer.h"
#include "tracker-deserializer-turtle.h"
#include "tracker-deserializer-json.h"
#include "tracker-deserializer-json-ld.h"
#include "tracker-deserializer-xml.h"
#include "tracker-private.h"
enum {
PROP_0,
PROP_STREAM,
PROP_NAMESPACE_MANAGER,
N_PROPS
};
static GParamSpec *props[N_PROPS];
typedef struct _TrackerDeserializerPrivate TrackerDeserializerPrivate;
struct _TrackerDeserializerPrivate
{
GInputStream *stream;
TrackerNamespaceManager *namespaces;
};
G_DEFINE_ABSTRACT_TYPE_WITH_PRIVATE (TrackerDeserializer, tracker_deserializer,
TRACKER_TYPE_SPARQL_CURSOR)
static void
tracker_deserializer_finalize (GObject *object)
{
TrackerDeserializer *deserializer = TRACKER_DESERIALIZER (object);
TrackerDeserializerPrivate *priv =
tracker_deserializer_get_instance_private (deserializer);
g_clear_object (&priv->stream);
g_clear_object (&priv->namespaces);
G_OBJECT_CLASS (tracker_deserializer_parent_class)->finalize (object);
}
static void
tracker_deserializer_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
TrackerDeserializer *deserializer = TRACKER_DESERIALIZER (object);
TrackerDeserializerPrivate *priv =
tracker_deserializer_get_instance_private (deserializer);
switch (prop_id) {
case PROP_STREAM:
priv->stream = g_value_dup_object (value);
break;
case PROP_NAMESPACE_MANAGER:
priv->namespaces = g_value_dup_object (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
tracker_deserializer_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
TrackerDeserializer *deserializer = TRACKER_DESERIALIZER (object);
TrackerDeserializerPrivate *priv =
tracker_deserializer_get_instance_private (deserializer);
switch (prop_id) {
case PROP_STREAM:
g_value_set_object (value, priv->stream);
break;
case PROP_NAMESPACE_MANAGER:
g_value_set_object (value,
tracker_deserializer_get_namespaces (deserializer));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
tracker_deserializer_is_bound (TrackerSparqlCursor *cursor,
gint column)
{
return tracker_sparql_cursor_get_string (cursor, column, NULL) != NULL;
}
static void
tracker_deserializer_close (TrackerSparqlCursor *cursor)
{
TrackerDeserializer *deserializer = TRACKER_DESERIALIZER (cursor);
TrackerDeserializerPrivate *priv =
tracker_deserializer_get_instance_private (deserializer);
if (priv->stream)
g_input_stream_close (priv->stream, NULL, NULL);
}
static void
tracker_deserializer_class_init (TrackerDeserializerClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
TrackerSparqlCursorClass *cursor_class = TRACKER_SPARQL_CURSOR_CLASS (klass);
object_class->finalize = tracker_deserializer_finalize;
object_class->set_property = tracker_deserializer_set_property;
object_class->get_property = tracker_deserializer_get_property;
cursor_class->is_bound = tracker_deserializer_is_bound;
cursor_class->close = tracker_deserializer_close;
props[PROP_STREAM] =
g_param_spec_object ("stream",
"Stream",
"Stream",
G_TYPE_INPUT_STREAM,
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS |
G_PARAM_READABLE |
G_PARAM_WRITABLE);
props[PROP_NAMESPACE_MANAGER] =
g_param_spec_object ("namespace-manager",
"Namespace Manager",
"Namespace Manager",
TRACKER_TYPE_NAMESPACE_MANAGER,
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS |
G_PARAM_READABLE |
G_PARAM_WRITABLE);
g_object_class_install_properties (object_class, N_PROPS, props);
}
static void
tracker_deserializer_init (TrackerDeserializer *deserializer)
{
}
TrackerSparqlCursor *
tracker_deserializer_new (GInputStream *stream,
TrackerNamespaceManager *namespaces,
TrackerSerializerFormat format)
{
g_return_val_if_fail (G_IS_INPUT_STREAM (stream), NULL);
switch (format) {
case TRACKER_SERIALIZER_FORMAT_JSON:
return tracker_deserializer_json_new (stream, namespaces);
case TRACKER_SERIALIZER_FORMAT_XML:
return tracker_deserializer_xml_new (stream, namespaces);
case TRACKER_SERIALIZER_FORMAT_TTL:
return tracker_deserializer_turtle_new (stream, namespaces);
case TRACKER_SERIALIZER_FORMAT_TRIG:
return tracker_deserializer_trig_new (stream, namespaces);
case TRACKER_SERIALIZER_FORMAT_JSON_LD:
return tracker_deserializer_json_ld_new (stream, namespaces);
default:
g_warn_if_reached ();
return NULL;
}
}
static TrackerSerializerFormat
pick_format_for_file (GFile *file)
{
TrackerSerializerFormat format = TRACKER_SERIALIZER_FORMAT_TTL;
gchar *uri;
uri = g_file_get_uri (file);
if (g_str_has_suffix (uri, ".trig"))
format = TRACKER_SERIALIZER_FORMAT_TRIG;
if (g_str_has_suffix (uri, ".jsonld"))
format = TRACKER_SERIALIZER_FORMAT_JSON_LD;
g_free (uri);
return format;
}
TrackerSparqlCursor *
tracker_deserializer_new_for_file (GFile *file,
TrackerNamespaceManager *namespaces,
GError **error)
{
TrackerSparqlCursor *deserializer;
GInputStream *istream;
TrackerSerializerFormat format;
g_return_val_if_fail (G_IS_FILE (file), NULL);
g_return_val_if_fail (!error || !*error, NULL);
istream = G_INPUT_STREAM (g_file_read (file, NULL, error));
if (!istream)
return NULL;
format = pick_format_for_file (file);
deserializer = tracker_deserializer_new (istream, namespaces, format);
g_object_unref (istream);
return TRACKER_SPARQL_CURSOR (deserializer);
}
gboolean
tracker_deserializer_get_parser_location (TrackerDeserializer *deserializer,
goffset *line_no,
goffset *column_no)
{
return TRACKER_DESERIALIZER_GET_CLASS (deserializer)->get_parser_location (deserializer,
line_no,
column_no);
}
GInputStream *
tracker_deserializer_get_stream (TrackerDeserializer *deserializer)
{
TrackerDeserializerPrivate *priv =
tracker_deserializer_get_instance_private (deserializer);
return priv->stream;
}
TrackerNamespaceManager *
tracker_deserializer_get_namespaces (TrackerDeserializer *deserializer)
{
TrackerDeserializerPrivate *priv =
tracker_deserializer_get_instance_private (deserializer);
if (!priv->namespaces)
priv->namespaces = tracker_namespace_manager_new ();
return priv->namespaces;
}
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