type of operation
a file which has the specifications for the GdaServerOperation object to create
Creates a binding between source_property on source and target_property
on target.
Whenever the source_property is changed the target_property is
updated using the same value. For instance:
g_object_bind_property (action, "active", widget, "sensitive", 0);
Will result in the "sensitive" property of the widget #GObject instance to be updated with the same value of the "active" property of the action #GObject instance.
If flags contains %G_BINDING_BIDIRECTIONAL then the binding will be mutual:
if target_property on target changes then the source_property on source
will be updated as well.
The binding will automatically be removed when either the source or the
target instances are finalized. To remove the binding without affecting the
source and the target you can just call g_object_unref() on the returned
#GBinding instance.
Removing the binding by calling g_object_unref() on it must only be done if
the binding, source and target are only used from a single thread and it
is clear that both source and target outlive the binding. Especially it
is not safe to rely on this if the binding, source or target can be
finalized from different threads. Keep another reference to the binding and
use g_binding_unbind() instead to be on the safe side.
A #GObject can have multiple bindings.
the property on source to bind
the target #GObject
the property on target to bind
flags to pass to #GBinding
Creates a binding between source_property on source and target_property
on target, allowing you to set the transformation functions to be used by
the binding.
This function is the language bindings friendly version of g_object_bind_property_full(), using #GClosures instead of function pointers.
the property on source to bind
the target #GObject
the property on target to bind
flags to pass to #GBinding
a #GClosure wrapping the transformation function from the source to the target, or %NULL to use the default
a #GClosure wrapping the transformation function from the target to the source, or %NULL to use the default
This function is intended for #GObject implementations to re-enforce a [floating][floating-ref] object reference. Doing this is seldom required: all #GInitiallyUnowneds are created with a floating reference which usually just needs to be sunken by calling g_object_ref_sink().
Increases the freeze count on object. If the freeze count is
non-zero, the emission of "notify" signals on object is
stopped. The signals are queued until the freeze count is decreased
to zero. Duplicate notifications are squashed so that at most one
#GObject::notify signal is emitted for each property modified while the
object is frozen.
This is necessary for accessors that modify multiple properties to prevent premature notification while the object is still being modified.
Gets a named field from the objects table of associations (see g_object_set_data()).
name of the key for that association
Get the complete path to the parent of the node defined by path
a complete path to a node (starting with "/")
Get the last part of path
a complete path to a node (starting with "/")
Convenience function to get the type of a node.
a complete path to a node (starting with "/")
a place to store the status of the node, or %NULL
Get the type of operation op is for
Gets a property of an object.
The value can be:
In general, a copy is made of the property contents and the caller is responsible for freeing the memory by calling g_value_unset().
Note that g_object_get_property() is really intended for language bindings, g_object_get() is much more convenient for C programming.
the name of the property to get
return location for the property value
This function gets back user data pointers stored via g_object_set_qdata().
A #GQuark, naming the user data pointer
Get an array of strings containing the paths of nodes situated at the root of op.
Fetch the contents of a sequence. path can describe either a sequence (for example "/SEQNAME") or an item in a sequence
(for example "/SEQNAME/3")
a complete path to a sequence node (starting with "/")
Get the value for the node at the path path
a complete path to a node (starting with "/")
Gets n_properties properties for an object.
Obtained properties will be set to values. All properties must be valid.
Warnings will be emitted and undefined behaviour may result if invalid
properties are passed in.
the names of each property to get
the values of each property to get
Checks whether object has a [floating][floating-ref] reference.
Tells if all the required values in op have been defined.
if xml_file is not %NULL, the validity of op is tested against that specification,
and not against the current op's specification.
an XML specification file (see gda_server_operation_new()) or %NULL
Tells if all the required values in op have been defined.
if xml_data is not %NULL, the validity of op is tested against that specification,
and not against the current op's specification.
the name of a resource containing an XML specification data (see gda_server_operation_new()) or %NULL
Loads the contents of node into op. The XML tree passed through the node
argument must correspond to an XML tree saved using gda_server_operation_save_data_to_xml().
a #xmlNodePtr
Emits a "notify" signal for the property property_name on object.
When possible, eg. when signaling a property change from within the class that registered the property, you should use g_object_notify_by_pspec() instead.
Note that emission of the notify signal may be blocked with g_object_freeze_notify(). In this case, the signal emissions are queued and will be emitted (in reverse order) when g_object_thaw_notify() is called.
the name of a property installed on the class of object.
Emits a "notify" signal for the property specified by pspec on object.
This function omits the property name lookup, hence it is faster than g_object_notify().
One way to avoid using g_object_notify() from within the class that registered the properties, and using g_object_notify_by_pspec() instead, is to store the GParamSpec used with g_object_class_install_property() inside a static array, e.g.:
enum
{
PROP_0,
PROP_FOO,
PROP_LAST
};
static GParamSpec *properties[PROP_LAST];
static void
my_object_class_init (MyObjectClass *klass)
{
properties[PROP_FOO] = g_param_spec_int ("foo", "Foo", "The foo",
0, 100,
50,
G_PARAM_READWRITE);
g_object_class_install_property (gobject_class,
PROP_FOO,
properties[PROP_FOO]);
}
and then notify a change on the "foo" property with:
g_object_notify_by_pspec (self, properties[PROP_FOO]);
the #GParamSpec of a property installed on the class of object.
Creates a new database using the specifications in op. op can be obtained using
gda_server_provider_create_operation(), or gda_server_operation_prepare_create_database().
the database provider to use, or %NULL if op has been created using gda_server_operation_prepare_create_database()
Destroys an existing database using the specifications in op. op can be obtained using
gda_server_provider_create_operation(), or gda_server_operation_prepare_drop_database().
the database provider to use, or %NULL if op has been created using gda_server_operation_prepare_drop_database()
Increase the reference count of object, and possibly remove the
[floating][floating-ref] reference, if object has a floating reference.
In other words, if the object is floating, then this call "assumes ownership" of the floating reference, converting it to a normal reference by clearing the floating flag while leaving the reference count unchanged. If the object is not floating, then this call adds a new normal reference increasing the reference count by one.
Since GLib 2.56, the type of object will be propagated to the return type
under the same conditions as for g_object_ref().
Creates an SQL statement (possibly using some specific extensions of the DBMS) corresponding to the
op operation. Note that the returned string may actually contain more than one SQL statement.
This function's purpose is mainly informative to get the actual SQL code which would be executed to perform the operation; to actually perform the operation, use gda_server_operation_perform().
Releases all references to other objects. This can be used to break reference cycles.
This function should only be called from object system implementations.
Each object carries around a table of associations from strings to pointers. This function lets you set an association.
If the object already had an association with that name, the old association will be destroyed.
Internally, the key is converted to a #GQuark using g_quark_from_string().
This means a copy of key is kept permanently (even after object has been
finalized) — so it is recommended to only use a small, bounded set of values
for key in your program, to avoid the #GQuark storage growing unbounded.
name of the key
data to associate with that key
Sets a property on an object.
the name of the property to set
the value
Set the value for the node at the path formed using path_format and the ... ellipse (the rules are the same as
for g_strdup_printf()).
Note that trying to set a value for a path which is not used by the current
provider, such as "/TABLE_OPTIONS_P/TABLE_ENGINE" for a PostgreSQL connection (this option is only supported for MySQL),
will
Here are the possible formats of path_format:
@COLUMN/5" for the value at the
6th row of the "COLUMN" column of the "ARRAY" data model, then:
a string
a complete path to a node (starting with "/")
Remove a specified datum from the object's data associations, without invoking the association's destroy handler.
name of the key
This function gets back user data pointers stored via
g_object_set_qdata() and removes the data from object
without invoking its destroy() function (if any was
set).
Usually, calling this function is only required to update
user data pointers with a destroy notifier, for example:
void
object_add_to_user_list (GObject *object,
const gchar *new_string)
{
// the quark, naming the object data
GQuark quark_string_list = g_quark_from_static_string ("my-string-list");
// retrieve the old string list
GList *list = g_object_steal_qdata (object, quark_string_list);
// prepend new string
list = g_list_prepend (list, g_strdup (new_string));
// this changed 'list', so we need to set it again
g_object_set_qdata_full (object, quark_string_list, list, free_string_list);
}
static void
free_string_list (gpointer data)
{
GList *node, *list = data;
for (node = list; node; node = node->next)
g_free (node->data);
g_list_free (list);
}
Using g_object_get_qdata() in the above example, instead of g_object_steal_qdata() would have left the destroy function set, and thus the partial string list would have been freed upon g_object_set_qdata_full().
A #GQuark, naming the user data pointer
Reverts the effect of a previous call to
g_object_freeze_notify(). The freeze count is decreased on object
and when it reaches zero, queued "notify" signals are emitted.
Duplicate notifications for each property are squashed so that at most one #GObject::notify signal is emitted for each property, in the reverse order in which they have been queued.
It is an error to call this function when the freeze count is zero.
Decreases the reference count of object. When its reference count
drops to 0, the object is finalized (i.e. its memory is freed).
If the pointer to the #GObject may be reused in future (for example, if it is an instance variable of another object), it is recommended to clear the pointer to %NULL rather than retain a dangling pointer to a potentially invalid #GObject instance. Use g_clear_object() for this.
This function essentially limits the life time of the closure to
the life time of the object. That is, when the object is finalized,
the closure is invalidated by calling g_closure_invalidate() on
it, in order to prevent invocations of the closure with a finalized
(nonexisting) object. Also, g_object_ref() and g_object_unref() are
added as marshal guards to the closure, to ensure that an extra
reference count is held on object during invocation of the
closure. Usually, this function will be called on closures that
use this object as closure data.
#GClosure to watch
Find the #GParamSpec with the given name for an
interface. Generally, the interface vtable passed in as g_iface
will be the default vtable from g_type_default_interface_ref(), or,
if you know the interface has already been loaded,
g_type_default_interface_peek().
any interface vtable for the interface, or the default vtable for the interface
name of a property to look up.
Add a property to an interface; this is only useful for interfaces that are added to GObject-derived types. Adding a property to an interface forces all objects classes with that interface to have a compatible property. The compatible property could be a newly created #GParamSpec, but normally g_object_class_override_property() will be used so that the object class only needs to provide an implementation and inherits the property description, default value, bounds, and so forth from the interface property.
This function is meant to be called from the interface's default
vtable initialization function (the class_init member of
#GTypeInfo.) It must not be called after after class_init has
been called for any object types implementing this interface.
If pspec is a floating reference, it will be consumed.
any interface vtable for the interface, or the default vtable for the interface.
the #GParamSpec for the new property
Lists the properties of an interface.Generally, the interface
vtable passed in as g_iface will be the default vtable from
g_type_default_interface_ref(), or, if you know the interface has
already been loaded, g_type_default_interface_peek().
any interface vtable for the interface, or the default vtable for the interface
IMPORTANT NOTE: Using this funtion is not the recommended way of creating a #GdaServerOperation object, the correct way is to use gda_server_provider_create_operation(); this method is reserved for the database provider's implementation.
Creates a new #GdaServerOperation object from the xml_file specifications
The xml_file must respect the DTD described in the "libgda-server-operation.dtd" file: its top
node must be a <serv_op> tag.
type of operation
a file which has the specifications for the GdaServerOperation object to create
Creates a new instance of a #GObject subtype and sets its properties.
Construction parameters (see %G_PARAM_CONSTRUCT, %G_PARAM_CONSTRUCT_ONLY) which are not explicitly specified are set to their default values.
the type id of the #GObject subtype to instantiate
an array of #GParameter
Get a string version of type
a #GdaServerOperationType value
Creates a new #GdaServerOperation object which contains the specifications required to create a database. Once these specifications are provided, use gda_server_operation_perform_create_database() to perform the database creation.
If db_name is left %NULL, then the name of the database to create will have to be set in the
returned #GdaServerOperation using gda_server_operation_set_value_at().
the database provider to use
the name of the database to create, or %NULL
Creates a new #GdaServerOperation object which contains the specifications required to drop a database. Once these specifications provided, use gda_server_operation_perform_drop_database() to perform the database creation.
If db_name is left %NULL, then the name of the database to drop will have to be set in the
returned #GdaServerOperation using gda_server_operation_set_value_at().
the database provider to use
the name of the database to drop, or %NULL
Performs the reverse of gda_server_operation_op_type_to_string()
a string
IMPORTANT NOTE: Using this funtion is not the recommended way of creating a #GdaServerOperation object, the correct way is to use gda_server_provider_create_operation(); this method is reserved for the database provider's implementation.
Creates a new #GdaServerOperation object from the
xml_filespecificationsThe
xml_filemust respect the DTD described in the "libgda-server-operation.dtd" file: its top node must be a <serv_op> tag.