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<a name="json-glib-GObject-Serialization"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="json-glib-GObject-Serialization.top_of_page"></a>GObject Serialization</span></h2>
<p>GObject Serialization — Serialize and deserialize GObjects</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="json-glib-GObject-Serialization.functions"></a><h2>Functions</h2>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<a class="link" href="json-glib-JSON-Node.html#JsonNode"><span class="returnvalue">JsonNode</span></a> *
</td>
<td class="function_name">
<a class="link" href="json-glib-GObject-Serialization.html#json-gobject-serialize" title="json_gobject_serialize ()">json_gobject_serialize</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">GObject</span> *
</td>
<td class="function_name">
<a class="link" href="json-glib-GObject-Serialization.html#json-gobject-deserialize" title="json_gobject_deserialize ()">json_gobject_deserialize</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gchar</span> *
</td>
<td class="function_name">
<a class="link" href="json-glib-GObject-Serialization.html#json-gobject-to-data" title="json_gobject_to_data ()">json_gobject_to_data</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">GObject</span> *
</td>
<td class="function_name">
<a class="link" href="json-glib-GObject-Serialization.html#json-gobject-from-data" title="json_gobject_from_data ()">json_gobject_from_data</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">GObject</span> *
</td>
<td class="function_name">
<a class="link" href="json-glib-GObject-Serialization.html#json-construct-gobject" title="json_construct_gobject ()">json_construct_gobject</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gchar</span> *
</td>
<td class="function_name">
<a class="link" href="json-glib-GObject-Serialization.html#json-serialize-gobject" title="json_serialize_gobject ()">json_serialize_gobject</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="json-glib-GObject-Serialization.description"></a><h2>Description</h2>
<p>JSON-GLib provides API for serializing and deserializing <span class="type">GObject</span>
instances to and from JSON data streams.</p>
<p>Simple <span class="type">GObject</span> classes can be (de)serialized into JSON objects, if the
properties have compatible types with the native JSON types (integers,
booleans, strings, string vectors). If the class to be (de)serialized has
complex data types for properties (like boxed types or other objects)
then the class should implement the provided <a class="link" href="json-glib-Serializable-Interface.html#JsonSerializable"><span class="type">JsonSerializable</span></a> interface
and its virtual functions.</p>
</div>
<div class="refsect1">
<a name="json-glib-GObject-Serialization.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="json-gobject-serialize"></a><h3>json_gobject_serialize ()</h3>
<pre class="programlisting"><a class="link" href="json-glib-JSON-Node.html#JsonNode"><span class="returnvalue">JsonNode</span></a> *
json_gobject_serialize (<em class="parameter"><code><span class="type">GObject</span> *gobject</code></em>);</pre>
<p>Creates a <a class="link" href="json-glib-JSON-Node.html#JsonNode"><span class="type">JsonNode</span></a> representing the passed <span class="type">GObject</span>
instance. Each member of the returned JSON object will
map to a property of the <span class="type">GObject</span></p>
<div class="refsect3">
<a name="id-1.5.2.5.2.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>gobject</p></td>
<td class="parameter_description"><p>a <span class="type">GObject</span></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.5.2.5.2.6"></a><h4>Returns</h4>
<p> the newly created <a class="link" href="json-glib-JSON-Node.html#JsonNode"><span class="type">JsonNode</span></a>
of type <a class="link" href="json-glib-JSON-Node.html#JSON-NODE-OBJECT:CAPS"><code class="literal">JSON_NODE_OBJECT</code></a>. Use <a class="link" href="json-glib-JSON-Node.html#json-node-free" title="json_node_free ()"><code class="function">json_node_free()</code></a> to free
the resources allocated by this function. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
<p class="since">Since 0.10</p>
</div>
<hr>
<div class="refsect2">
<a name="json-gobject-deserialize"></a><h3>json_gobject_deserialize ()</h3>
<pre class="programlisting"><span class="returnvalue">GObject</span> *
json_gobject_deserialize (<em class="parameter"><code><span class="type">GType</span> gtype</code></em>,
<em class="parameter"><code><a class="link" href="json-glib-JSON-Node.html#JsonNode"><span class="type">JsonNode</span></a> *node</code></em>);</pre>
<p>Creates a new <span class="type">GObject</span> of type <em class="parameter"><code>gtype</code></em>
, and constructs it
using the members of the passed <a class="link" href="json-glib-JSON-Object.html#JsonObject"><span class="type">JsonObject</span></a></p>
<div class="refsect3">
<a name="id-1.5.2.5.3.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>gtype</p></td>
<td class="parameter_description"><p>the type of the <span class="type">GObject</span> to create</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>node</p></td>
<td class="parameter_description"><p>a <a class="link" href="json-glib-JSON-Node.html#JsonNode"><span class="type">JsonNode</span></a> of type <a class="link" href="json-glib-JSON-Node.html#JSON-NODE-OBJECT:CAPS"><code class="literal">JSON_NODE_OBJECT</code></a> describing the
instance of type <em class="parameter"><code>gtype</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.5.2.5.3.6"></a><h4>Returns</h4>
<p> The newly created <span class="type">GObject</span>
instance. Use <code class="function">g_object_unref()</code> to free the resources
allocated by this function. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
<p class="since">Since 0.10</p>
</div>
<hr>
<div class="refsect2">
<a name="json-gobject-to-data"></a><h3>json_gobject_to_data ()</h3>
<pre class="programlisting"><span class="returnvalue">gchar</span> *
json_gobject_to_data (<em class="parameter"><code><span class="type">GObject</span> *gobject</code></em>,
<em class="parameter"><code><span class="type">gsize</span> *length</code></em>);</pre>
<p>Serializes a <span class="type">GObject</span> into a JSON data stream, iterating recursively
over each property.</p>
<p>If <em class="parameter"><code>gobject</code></em>
implements the <a class="link" href="json-glib-Serializable-Interface.html#JsonSerializableIface" title="struct JsonSerializableIface"><span class="type">JsonSerializableIface</span></a> interface, it will
be asked to serialize all its properties; otherwise, the default
implementation will be use to translate the compatible types into
JSON native types.</p>
<div class="refsect3">
<a name="id-1.5.2.5.4.6"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>gobject</p></td>
<td class="parameter_description"><p>a <span class="type">GObject</span></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>length</p></td>
<td class="parameter_description"><p> return value for the length of the buffer, or <code class="literal">NULL</code>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.5.2.5.4.7"></a><h4>Returns</h4>
<p> a JSON data stream representing the passed <span class="type">GObject</span></p>
<p></p>
</div>
<p class="since">Since 0.10</p>
</div>
<hr>
<div class="refsect2">
<a name="json-gobject-from-data"></a><h3>json_gobject_from_data ()</h3>
<pre class="programlisting"><span class="returnvalue">GObject</span> *
json_gobject_from_data (<em class="parameter"><code><span class="type">GType</span> gtype</code></em>,
<em class="parameter"><code>const <span class="type">gchar</span> *data</code></em>,
<em class="parameter"><code><span class="type">gssize</span> length</code></em>,
<em class="parameter"><code><span class="type">GError</span> **error</code></em>);</pre>
<p>Deserializes a JSON data stream and creates the corresponding
<span class="type">GObject</span> class. If <em class="parameter"><code>gtype</code></em>
implements the <a class="link" href="json-glib-Serializable-Interface.html#JsonSerializableIface" title="struct JsonSerializableIface"><span class="type">JsonSerializableIface</span></a>
interface, it will be asked to deserialize all the JSON members
into the respective properties; otherwise, the default implementation
will be used to translate the compatible JSON native types.</p>
<p>Note: the JSON data stream must be an object declaration.</p>
<div class="refsect3">
<a name="id-1.5.2.5.5.6"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>gtype</p></td>
<td class="parameter_description"><p>the <span class="type">GType</span> of object to construct</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>data</p></td>
<td class="parameter_description"><p>a JSON data stream</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>length</p></td>
<td class="parameter_description"><p>length of the data stream, or -1 if it is NUL-terminated</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>return location for a <span class="type">GError</span>, or <code class="literal">NULL</code></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.5.2.5.5.7"></a><h4>Returns</h4>
<p> a <span class="type">GObject</span> or <code class="literal">NULL</code>. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
<p class="since">Since 0.10</p>
</div>
<hr>
<div class="refsect2">
<a name="json-construct-gobject"></a><h3>json_construct_gobject ()</h3>
<pre class="programlisting"><span class="returnvalue">GObject</span> *
json_construct_gobject (<em class="parameter"><code><span class="type">GType</span> gtype</code></em>,
<em class="parameter"><code>const <span class="type">gchar</span> *data</code></em>,
<em class="parameter"><code><span class="type">gsize</span> length</code></em>,
<em class="parameter"><code><span class="type">GError</span> **error</code></em>);</pre>
<div class="warning">
<p><code class="literal">json_construct_gobject</code> has been deprecated since version 0.10 and should not be used in newly-written code.</p>
<p>Use <a class="link" href="json-glib-GObject-Serialization.html#json-gobject-from-data" title="json_gobject_from_data ()"><code class="function">json_gobject_from_data()</code></a> instead</p>
</div>
<p>Deserializes a JSON data stream and creates the corresponding
<span class="type">GObject</span> class. If <em class="parameter"><code>gtype</code></em>
implements the <a class="link" href="json-glib-Serializable-Interface.html#JsonSerializableIface" title="struct JsonSerializableIface"><span class="type">JsonSerializableIface</span></a>
interface, it will be asked to deserialize all the JSON members
into the respective properties; otherwise, the default implementation
will be used to translate the compatible JSON native types.</p>
<p>Note: the JSON data stream must be an object declaration.</p>
<div class="refsect3">
<a name="id-1.5.2.5.6.8"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>gtype</p></td>
<td class="parameter_description"><p>the <span class="type">GType</span> of object to construct</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>data</p></td>
<td class="parameter_description"><p>a JSON data stream</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>length</p></td>
<td class="parameter_description"><p>length of the data stream</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>return location for a <span class="type">GError</span>, or <code class="literal">NULL</code></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.5.2.5.6.9"></a><h4>Returns</h4>
<p> a <span class="type">GObject</span> or <code class="literal">NULL</code>. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
<p class="since">Since 0.4</p>
</div>
<hr>
<div class="refsect2">
<a name="json-serialize-gobject"></a><h3>json_serialize_gobject ()</h3>
<pre class="programlisting"><span class="returnvalue">gchar</span> *
json_serialize_gobject (<em class="parameter"><code><span class="type">GObject</span> *gobject</code></em>,
<em class="parameter"><code><span class="type">gsize</span> *length</code></em>);</pre>
<div class="warning">
<p><code class="literal">json_serialize_gobject</code> has been deprecated since version 0.10 and should not be used in newly-written code.</p>
<p>Use <a class="link" href="json-glib-GObject-Serialization.html#json-gobject-to-data" title="json_gobject_to_data ()"><code class="function">json_gobject_to_data()</code></a> instead</p>
</div>
<p>Serializes a <span class="type">GObject</span> into a JSON data stream. If <em class="parameter"><code>gobject</code></em>
implements
the <a class="link" href="json-glib-Serializable-Interface.html#JsonSerializableIface" title="struct JsonSerializableIface"><span class="type">JsonSerializableIface</span></a> interface, it will be asked to serizalize all
its properties; otherwise, the default implementation will be use to
translate the compatible types into JSON native types.</p>
<div class="refsect3">
<a name="id-1.5.2.5.7.6"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>gobject</p></td>
<td class="parameter_description"><p>a <span class="type">GObject</span></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>length</p></td>
<td class="parameter_description"><p> return value for the length of the buffer, or <code class="literal">NULL</code>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.5.2.5.7.7"></a><h4>Returns</h4>
<p> a JSON data stream representing the passed <span class="type">GObject</span></p>
<p></p>
</div>
</div>
</div>
<div class="refsect1">
<a name="json-glib-GObject-Serialization.other_details"></a><h2>Types and Values</h2>
</div>
</div>
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