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<a name="libbonobo-bonobo-moniker-extender"></a><div class="titlepage"></div>
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<h2><span class="refentrytitle"><a name="libbonobo-bonobo-moniker-extender.top_of_page"></a>BonoboMonikerExtender</span></h2>
<p>BonoboMonikerExtender — A way to extend arbitary monikers</p>
</td>
<td valign="top" align="right"></td>
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<div class="refsynopsisdiv">
<a name="libbonobo-bonobo-moniker-extender.synopsis"></a><h2>Synopsis</h2>
<a name="BonoboMonikerExtender"></a><pre class="synopsis">struct <a class="link" href="libbonobo-bonobo-moniker-extender.html#BonoboMonikerExtender-struct" title="struct BonoboMonikerExtender">BonoboMonikerExtender</a>;
<a class="link" href="libbonobo-bonobo-moniker-extender.html#BonoboMonikerExtenderClass" title="BonoboMonikerExtenderClass">BonoboMonikerExtenderClass</a>;
<span class="returnvalue">Bonobo_Unknown</span> (<a class="link" href="libbonobo-bonobo-moniker-extender.html#BonoboMonikerExtenderFn" title="BonoboMonikerExtenderFn ()">*BonoboMonikerExtenderFn</a>) (<em class="parameter"><code><a class="link" href="libbonobo-bonobo-moniker-extender.html#BonoboMonikerExtender"><span class="type">BonoboMonikerExtender</span></a> *extender</code></em>,
<em class="parameter"><code>const <span class="type">Bonobo_Moniker</span> parent</code></em>,
<em class="parameter"><code>const <span class="type">Bonobo_ResolveOptions</span> *options</code></em>,
<em class="parameter"><code>const <span class="type">CORBA_char</span> *display_name</code></em>,
<em class="parameter"><code>const <span class="type">CORBA_char</span> *requested_interface</code></em>,
<em class="parameter"><code><span class="type">CORBA_Environment</span> *ev</code></em>);
<a class="link" href="libbonobo-bonobo-moniker-extender.html#BonoboMonikerExtender"><span class="returnvalue">BonoboMonikerExtender</span></a> * <a class="link" href="libbonobo-bonobo-moniker-extender.html#bonobo-moniker-extender-new" title="bonobo_moniker_extender_new ()">bonobo_moniker_extender_new</a> (<em class="parameter"><code><a class="link" href="libbonobo-bonobo-moniker-extender.html#BonoboMonikerExtenderFn" title="BonoboMonikerExtenderFn ()"><span class="type">BonoboMonikerExtenderFn</span></a> resolve</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> data</code></em>);
<span class="returnvalue">Bonobo_MonikerExtender</span> <a class="link" href="libbonobo-bonobo-moniker-extender.html#bonobo-moniker-find-extender" title="bonobo_moniker_find_extender ()">bonobo_moniker_find_extender</a> (<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>,
<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *interface</code></em>,
<em class="parameter"><code><span class="type">CORBA_Environment</span> *opt_ev</code></em>);
<span class="returnvalue">Bonobo_Unknown</span> <a class="link" href="libbonobo-bonobo-moniker-extender.html#bonobo-moniker-use-extender" title="bonobo_moniker_use_extender ()">bonobo_moniker_use_extender</a> (<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *extender_oafiid</code></em>,
<em class="parameter"><code><a class="link" href="libbonobo-bonobo-moniker.html#BonoboMoniker"><span class="type">BonoboMoniker</span></a> *moniker</code></em>,
<em class="parameter"><code>const <span class="type">Bonobo_ResolveOptions</span> *options</code></em>,
<em class="parameter"><code>const <span class="type">CORBA_char</span> *requested_interface</code></em>,
<em class="parameter"><code><span class="type">CORBA_Environment</span> *opt_ev</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="libbonobo-bonobo-moniker-extender.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="synopsis">
<a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject">GObject</a>
+----<a class="link" href="libbonobo-bonobo-object.html#BonoboObject">BonoboObject</a>
+----BonoboMonikerExtender
</pre>
</div>
<div class="refsect1">
<a name="libbonobo-bonobo-moniker-extender.description"></a><h2>Description</h2>
<p>
A moniker extender is used to extend the functionality of a moniker.
There are two standard moniker extenders that cannot be system wide,
since they use the oaf database to expand the scope of a moniker to
arbitrarily many interfaces. These are invoked explicitely by monikers
implementing the stream interface in the following way:
</p>
<div class="example">
<a name="id420249"></a><p class="title"><b>Example 18. Explicit Stream extender usage example</b></p>
<div class="example-contents"><pre class="programlisting">
Bonobo_Unknown
example_moniker_resolve (BonoboMoniker *moniker,
const Bonobo_ResolveOptions *options,
const CORBA_char *requested_interface,
CORBA_Environment *ev)
{
if (!strcmp (requested_interface, "IDL:Bonobo/Stream:1.0"))
return handle_stream (moniker, options, ev);
else
return bonobo_moniker_use_extender (
"OAFIID:Bonobo_MonikerExtender_stream",
moniker, options, requested_interface, ev);
}
</pre></div>
</div>
<p><br class="example-break">
The moniker extender essentialy resolves 'moniker' against stream
and by some means ( not known when the moniker was written ) converts
this to a new exotic interface - via. the PersistStream interface.
</p>
<p>
All standard moniker extenders are registered by adding a fragment
like this:
</p>
<div class="example">
<a name="id420271"></a><p class="title"><b>Example 19. Oaf information for an extender</b></p>
<div class="example-contents"><pre class="programlisting">
<oaf_attribute name="bonobo:moniker_extender" type="stringv">
<item value="file:"/>
</oaf_attribute>
</pre></div>
</div>
<p><br class="example-break">
to the .oaf file. This registers the extender with the system, such
that when a moniker resolve fails an extender can be found for any
of the monikers with prefix specified in the "bonobo:moniker_extender"
stringv.
</p>
<p>
Implementing your own extender is extremely simple, much like
<a class="link" href="libbonobo-bonobo-moniker-simple.html#BonoboMonikerSimple"><span class="type">BonoboMonikerSimple</span></a>.
</p>
<div class="example">
<a name="id420298"></a><p class="title"><b>Example 20. Oaf information for an extender</b></p>
<div class="example-contents"><pre class="programlisting">
Bonobo_Unknown
example_extender_resolve (BonoboMonikerExtender *extender,
const Bonobo_Moniker m,
const Bonobo_ResolveOptions *options,
const CORBA_char *display_name,
const CORBA_char *requested_interface,
CORBA_Environment *ev)
{
... resolve 'm' against an interface we know it supports ...
... then use that interface to provide requested_interface ...
}
</pre></div>
</div>
<p><br class="example-break">
It is registered again in much the same way in your factory:
</p>
<div class="example">
<a name="id420314"></a><p class="title"><b>Example 21. Creating a new simple moniker</b></p>
<div class="example-contents"><pre class="programlisting">
static BonoboObject *
bonobo_std_moniker_factory (BonoboGenericFactory *this,
const char *object_id,
void *data)
{
g_return_val_if_fail (object_id != NULL, NULL);
if (!strcmp (object_id, "OAFIID:Bonobo_MonikerExtender_file"))
return BONOBO_OBJECT (bonobo_moniker_extender_new (
example_extender_resolve, NULL));
else
return NULL;
}
</pre></div>
</div>
<p><br class="example-break">
</p>
</div>
<div class="refsect1">
<a name="libbonobo-bonobo-moniker-extender.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="BonoboMonikerExtender-struct"></a><h3>struct BonoboMonikerExtender</h3>
<pre class="programlisting">struct BonoboMonikerExtender;</pre>
<p>
Implements a moniker extender: Bonobo::MonikerExtender.
</p>
</div>
<hr>
<div class="refsect2">
<a name="BonoboMonikerExtenderClass"></a><h3>BonoboMonikerExtenderClass</h3>
<pre class="programlisting">typedef struct {
BonoboObjectClass parent_class;
POA_Bonobo_MonikerExtender__epv epv;
BonoboMonikerExtenderFn resolve;
} BonoboMonikerExtenderClass;
</pre>
<p>
BonoboMonikerExtender's class.
</p>
</div>
<hr>
<div class="refsect2">
<a name="BonoboMonikerExtenderFn"></a><h3>BonoboMonikerExtenderFn ()</h3>
<pre class="programlisting"><span class="returnvalue">Bonobo_Unknown</span> (*BonoboMonikerExtenderFn) (<em class="parameter"><code><a class="link" href="libbonobo-bonobo-moniker-extender.html#BonoboMonikerExtender"><span class="type">BonoboMonikerExtender</span></a> *extender</code></em>,
<em class="parameter"><code>const <span class="type">Bonobo_Moniker</span> parent</code></em>,
<em class="parameter"><code>const <span class="type">Bonobo_ResolveOptions</span> *options</code></em>,
<em class="parameter"><code>const <span class="type">CORBA_char</span> *display_name</code></em>,
<em class="parameter"><code>const <span class="type">CORBA_char</span> *requested_interface</code></em>,
<em class="parameter"><code><span class="type">CORBA_Environment</span> *ev</code></em>);</pre>
<p>
Moniker resolution callback function.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>extender</code></em> :</span></p></td>
<td>extender (self)</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>parent</code></em> :</span></p></td>
<td>parent moniker</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>options</code></em> :</span></p></td>
<td>resolve options</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>display_name</code></em> :</span></p></td>
<td>? FIXME</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>requested_interface</code></em> :</span></p></td>
<td>? FIXME</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the resolution resulting object</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="bonobo-moniker-extender-new"></a><h3>bonobo_moniker_extender_new ()</h3>
<pre class="programlisting"><a class="link" href="libbonobo-bonobo-moniker-extender.html#BonoboMonikerExtender"><span class="returnvalue">BonoboMonikerExtender</span></a> * bonobo_moniker_extender_new (<em class="parameter"><code><a class="link" href="libbonobo-bonobo-moniker-extender.html#BonoboMonikerExtenderFn" title="BonoboMonikerExtenderFn ()"><span class="type">BonoboMonikerExtenderFn</span></a> resolve</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> data</code></em>);</pre>
<p>
This creates a new moniker extender.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>resolve</code></em> :</span></p></td>
<td>the resolve function that will be used to do the extension</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>data</code></em> :</span></p></td>
<td>user data to be passed back to the resolve function.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the extender object</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="bonobo-moniker-find-extender"></a><h3>bonobo_moniker_find_extender ()</h3>
<pre class="programlisting"><span class="returnvalue">Bonobo_MonikerExtender</span> bonobo_moniker_find_extender (<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>,
<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *interface</code></em>,
<em class="parameter"><code><span class="type">CORBA_Environment</span> *opt_ev</code></em>);</pre>
<p>
This routine tries to locate an extender for our moniker
by examining a registry of extenders that map new interfaces
to certain moniker names.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>name</code></em> :</span></p></td>
<td>the name of the moniker we want to extend eg. 'file:'</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>interface</code></em> :</span></p></td>
<td>the interface we want to resolve to</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>opt_ev</code></em> :</span></p></td>
<td>an optional corba exception environment.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>an appropriate extender or CORBA_OBJECT_NIL.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="bonobo-moniker-use-extender"></a><h3>bonobo_moniker_use_extender ()</h3>
<pre class="programlisting"><span class="returnvalue">Bonobo_Unknown</span> bonobo_moniker_use_extender (<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *extender_oafiid</code></em>,
<em class="parameter"><code><a class="link" href="libbonobo-bonobo-moniker.html#BonoboMoniker"><span class="type">BonoboMoniker</span></a> *moniker</code></em>,
<em class="parameter"><code>const <span class="type">Bonobo_ResolveOptions</span> *options</code></em>,
<em class="parameter"><code>const <span class="type">CORBA_char</span> *requested_interface</code></em>,
<em class="parameter"><code><span class="type">CORBA_Environment</span> *opt_ev</code></em>);</pre>
<p>
Locates a known extender via. OAFIID; eg.
OAFIID:Bonobo_Moniker_Extender_file
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>extender_oafiid</code></em> :</span></p></td>
<td>The IID of the extender to use</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>moniker</code></em> :</span></p></td>
<td>the moniker to extend</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>options</code></em> :</span></p></td>
<td>resolve options</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>requested_interface</code></em> :</span></p></td>
<td>the requested interface</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>opt_ev</code></em> :</span></p></td>
<td>optional corba environment</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the resolved result or CORBA_OBJECT_NIL.</td>
</tr>
</tbody>
</table></div>
</div>
</div>
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