1 /*
2 * Copyright (C) 2006 - 2013 Vivien Malerba <malerba@gnome-db.org>
3 * Copyright (C) 2007 Armin Burgmeier <armin@openismus.com>
4 * Copyright (C) 2007 Murray Cumming <murrayc@murrayc.com>
5 * Copyright (C) 2009 Bas Driessen <bas.driessen@xobas.com>
6 * Copyright (C) 2010 David King <davidk@openismus.com>
7 * Copyright (C) 2010 Jonh Wendell <jwendell@gnome.org>
8 *
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2 of the License, or (at your option) any later version.
13 *
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with this library; if not, write to the
21 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
22 * Boston, MA 02110-1301, USA.
23 */
24
25 #include "gda-handler-string.h"
26 #include <string.h>
27 #include <glib/gi18n-lib.h>
28 #include <libgda/gda-util.h>
29 #include <libgda/gda-server-provider.h>
30
31 static void gda_handler_string_class_init (GdaHandlerStringClass * class);
32 static void gda_handler_string_init (GdaHandlerString * wid);
33 static void gda_handler_string_dispose (GObject * object);
34
35
36 /* GdaDataHandler interface */
37 static void gda_handler_string_data_handler_init (GdaDataHandlerIface *iface);
38 static gchar *gda_handler_string_get_sql_from_value (GdaDataHandler *dh, const GValue *value);
39 static gchar *gda_handler_string_get_str_from_value (GdaDataHandler *dh, const GValue *value);
40 static GValue *gda_handler_string_get_value_from_sql (GdaDataHandler *dh, const gchar *sql,
41 GType type);
42 static GValue *gda_handler_string_get_value_from_str (GdaDataHandler *dh, const gchar *sql,
43 GType type);
44 static GValue *gda_handler_string_get_sane_init_value (GdaDataHandler * dh, GType type);
45
46 static gboolean gda_handler_string_accepts_g_type (GdaDataHandler * dh, GType type);
47
48 static const gchar *gda_handler_string_get_descr (GdaDataHandler *dh);
49
50 struct _GdaHandlerStringPriv {
51 GdaServerProvider *prov;
52 GdaConnection *cnc;
53 };
54
55 /* get a pointer to the parents to be able to call their destructor */
56 static GObjectClass *parent_class = NULL;
57
58 GType
gda_handler_string_get_type(void)59 gda_handler_string_get_type (void)
60 {
61 static GType type = 0;
62
63 if (G_UNLIKELY (type == 0)) {
64 static GMutex registering;
65 static const GTypeInfo info = {
66 sizeof (GdaHandlerStringClass),
67 (GBaseInitFunc) NULL,
68 (GBaseFinalizeFunc) NULL,
69 (GClassInitFunc) gda_handler_string_class_init,
70 NULL,
71 NULL,
72 sizeof (GdaHandlerString),
73 0,
74 (GInstanceInitFunc) gda_handler_string_init,
75 NULL
76 };
77
78 static const GInterfaceInfo data_entry_info = {
79 (GInterfaceInitFunc) gda_handler_string_data_handler_init,
80 NULL,
81 NULL
82 };
83
84 g_mutex_lock (®istering);
85 if (type == 0) {
86 type = g_type_register_static (G_TYPE_OBJECT, "GdaHandlerString", &info, 0);
87 g_type_add_interface_static (type, GDA_TYPE_DATA_HANDLER, &data_entry_info);
88 }
89 g_mutex_unlock (®istering);
90 }
91 return type;
92 }
93
94 static void
gda_handler_string_data_handler_init(GdaDataHandlerIface * iface)95 gda_handler_string_data_handler_init (GdaDataHandlerIface *iface)
96 {
97 iface->get_sql_from_value = gda_handler_string_get_sql_from_value;
98 iface->get_str_from_value = gda_handler_string_get_str_from_value;
99 iface->get_value_from_sql = gda_handler_string_get_value_from_sql;
100 iface->get_value_from_str = gda_handler_string_get_value_from_str;
101 iface->get_sane_init_value = gda_handler_string_get_sane_init_value;
102 iface->accepts_g_type = gda_handler_string_accepts_g_type;
103 iface->get_descr = gda_handler_string_get_descr;
104 }
105
106
107 static void
gda_handler_string_class_init(GdaHandlerStringClass * class)108 gda_handler_string_class_init (GdaHandlerStringClass * class)
109 {
110 GObjectClass *object_class = G_OBJECT_CLASS (class);
111
112 parent_class = g_type_class_peek_parent (class);
113
114 object_class->dispose = gda_handler_string_dispose;
115 }
116
117 static void
gda_handler_string_init(GdaHandlerString * hdl)118 gda_handler_string_init (GdaHandlerString * hdl)
119 {
120 /* Private structure */
121 hdl->priv = g_new0 (GdaHandlerStringPriv, 1);
122 g_object_set_data (G_OBJECT (hdl), "name", _("InternalString"));
123 g_object_set_data (G_OBJECT (hdl), "descr", _("Strings representation"));
124 }
125
126 static void
gda_handler_string_dispose(GObject * object)127 gda_handler_string_dispose (GObject * object)
128 {
129 GdaHandlerString *hdl;
130
131 g_return_if_fail (object != NULL);
132 g_return_if_fail (GDA_IS_HANDLER_STRING (object));
133
134 hdl = GDA_HANDLER_STRING (object);
135
136 if (hdl->priv) {
137 if (hdl->priv->prov)
138 g_object_remove_weak_pointer (G_OBJECT (hdl->priv->prov), (gpointer) &(hdl->priv->prov));
139 if (hdl->priv->cnc)
140 g_object_remove_weak_pointer (G_OBJECT (hdl->priv->cnc), (gpointer) &(hdl->priv->cnc));
141
142 g_free (hdl->priv);
143 hdl->priv = NULL;
144 }
145
146 /* for the parent class */
147 parent_class->dispose (object);
148 }
149
150 /**
151 * gda_handler_string_new:
152 *
153 * Creates a data handler for strings
154 *
155 * Returns: (transfer full): the new object
156 */
157 GdaDataHandler *
gda_handler_string_new(void)158 gda_handler_string_new (void)
159 {
160 GObject *obj;
161
162 obj = g_object_new (GDA_TYPE_HANDLER_STRING, NULL);
163
164 return (GdaDataHandler *) obj;
165 }
166
167 /**
168 * gda_handler_string_new_with_provider:
169 * @prov: a #GdaServerProvider object
170 * @cnc: (allow-none): a #GdaConnection object, or %NULL
171 *
172 * Creates a data handler for strings, which will use some specific methods implemented
173 * by the @prov object (possibly also @cnc).
174 *
175 * Returns: (transfer full): the new object
176 */
177 GdaDataHandler *
gda_handler_string_new_with_provider(GdaServerProvider * prov,GdaConnection * cnc)178 gda_handler_string_new_with_provider (GdaServerProvider *prov, GdaConnection *cnc)
179 {
180 GObject *obj;
181 GdaHandlerString *dh;
182
183 g_return_val_if_fail (GDA_IS_SERVER_PROVIDER (prov), NULL);
184 g_return_val_if_fail (!cnc || GDA_IS_CONNECTION (cnc), NULL);
185
186 obj = g_object_new (GDA_TYPE_HANDLER_STRING, NULL);
187 dh = (GdaHandlerString*) obj;
188
189 dh->priv->prov = prov;
190 if (cnc)
191 dh->priv->cnc = cnc;
192
193 g_object_add_weak_pointer (G_OBJECT (prov), (gpointer) &(dh->priv->prov));
194 if (cnc)
195 g_object_add_weak_pointer (G_OBJECT (cnc), (gpointer) &(dh->priv->cnc));
196
197 return (GdaDataHandler *) obj;
198 }
199
200 static gchar *
gda_handler_string_get_sql_from_value(GdaDataHandler * iface,const GValue * value)201 gda_handler_string_get_sql_from_value (GdaDataHandler *iface, const GValue *value)
202 {
203 g_assert (value);
204
205 gchar *str, *retval;
206 GdaHandlerString *hdl;
207
208 g_return_val_if_fail (GDA_IS_HANDLER_STRING (iface), NULL);
209 hdl = (GdaHandlerString*) (iface);
210
211 str = gda_value_stringify ((GValue *) value);
212 if (str) {
213 gchar *str2;
214 if (hdl->priv->prov)
215 str2 = gda_server_provider_escape_string (hdl->priv->prov, hdl->priv->cnc, str);
216 else
217 str2 = gda_default_escape_string (str);
218 retval = g_strdup_printf ("'%s'", str2);
219 g_free (str2);
220 g_free (str);
221 }
222 else
223 retval = g_strdup ("NULL");
224
225 return retval;
226 }
227
228 static gchar *
gda_handler_string_get_str_from_value(G_GNUC_UNUSED GdaDataHandler * iface,const GValue * value)229 gda_handler_string_get_str_from_value (G_GNUC_UNUSED GdaDataHandler *iface, const GValue *value)
230 {
231 g_assert (value);
232 return gda_value_stringify ((GValue *) value);
233 }
234
235 static GValue *
gda_handler_string_get_value_from_sql(GdaDataHandler * iface,const gchar * sql,G_GNUC_UNUSED GType type)236 gda_handler_string_get_value_from_sql (GdaDataHandler *iface, const gchar *sql, G_GNUC_UNUSED GType type)
237 {
238 g_assert (sql);
239
240 GdaHandlerString *hdl;
241 GValue *value = NULL;
242
243 g_return_val_if_fail (GDA_IS_HANDLER_STRING (iface), NULL);
244 hdl = (GdaHandlerString*) (iface);
245
246 if (*sql) {
247 gint i = strlen (sql);
248 if ((i>=2) && (*sql=='\'') && (sql[i-1]=='\'')) {
249 gchar *str = g_strdup (sql);
250 gchar *unstr;
251
252 str[i-1] = 0;
253 if (hdl->priv->prov)
254 unstr = gda_server_provider_unescape_string (hdl->priv->prov, hdl->priv->cnc, str+1);
255 else
256 unstr = gda_default_unescape_string (str+1);
257 if (unstr) {
258 value = g_value_init (g_new0 (GValue, 1), G_TYPE_STRING);
259 g_value_take_string (value, unstr);
260 }
261 g_free (str);
262 }
263 }
264 else
265 value = gda_value_new_null ();
266
267 return value;
268 }
269
270 static GValue *
gda_handler_string_get_value_from_str(G_GNUC_UNUSED GdaDataHandler * iface,const gchar * str,G_GNUC_UNUSED GType type)271 gda_handler_string_get_value_from_str (G_GNUC_UNUSED GdaDataHandler *iface, const gchar *str, G_GNUC_UNUSED GType type)
272 {
273 g_assert (str);
274
275 GValue *value;
276 value = g_value_init (g_new0 (GValue, 1), G_TYPE_STRING);
277 g_value_set_string (value, str);
278 return value;
279 }
280
281 static GValue *
gda_handler_string_get_sane_init_value(G_GNUC_UNUSED GdaDataHandler * iface,G_GNUC_UNUSED GType type)282 gda_handler_string_get_sane_init_value (G_GNUC_UNUSED GdaDataHandler *iface, G_GNUC_UNUSED GType type)
283 {
284 GValue *value;
285
286 value = g_value_init (g_new0 (GValue, 1), G_TYPE_STRING);
287 g_value_set_string (value, "");
288 return value;
289 }
290
291 static gboolean
gda_handler_string_accepts_g_type(GdaDataHandler * iface,GType type)292 gda_handler_string_accepts_g_type (GdaDataHandler *iface, GType type)
293 {
294 g_assert (iface);
295 return type == G_TYPE_STRING ? TRUE : FALSE;
296 }
297
298 static const gchar *
gda_handler_string_get_descr(GdaDataHandler * iface)299 gda_handler_string_get_descr (GdaDataHandler *iface)
300 {
301 g_return_val_if_fail (GDA_IS_HANDLER_STRING (iface), NULL);
302 return g_object_get_data (G_OBJECT (iface), "descr");
303 }
304