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        KDE 4.4 PyKDE API Reference
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<h1>PreprocessorBase Class Reference</h1>
<code>from PyKDE4.akonadi import *</code>
<p>
Inherits: Akonadi.AgentBase &#x2192; <a href="http://www.riverbankcomputing.co.uk/static/Docs/PyQt4/html/qobject.html">QObject</a><br />

Namespace: Akonadi.PreprocessorBase<br />
<h2>Detailed Description</h2>

<p>The base class for all Akonadi preprocessor agents.
</p>
<p>
This class should be used as a base class by all preprocessor agents
since it encapsulates large parts of the protocol between
preprocessor agent, agent manager and the Akonadi storage.
</p>
<p>
Preprocessor agents are special agents that are informed about newly
added items before any other agents. This allows them to do filtering
on the items or any other task that shall be done before the new item
is visible in the Akonadi storage system.
</p>
<p>
The method all the preprocessors must implement is processItem().
</p>
<p>

<dl class="author" compact><dt><b>Author:</b></dt><dd> Szymon Stefanek &lt;s.stefanek@gmail.com&gt; </dd></dl>
<dl class="since" compact><dt><b>Since:</b></dt><dd> 4.4
</dd></dl>
</p>
<table border="0" cellpadding="0" cellspacing="0"><tr><td colspan="2"><br><h2>Enumerations</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="#ProcessingResult">ProcessingResult</a>&nbsp;</td><td class="memItemRight" valign="bottom">{&nbsp;ProcessingCompleted, ProcessingDelayed, ProcessingFailed, ProcessingRefused&nbsp;}</td></tr>
<tr><td colspan="2"><br><h2>Methods</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="#PreprocessorBase">__init__</a> (self, <a href="http://www.riverbankcomputing.co.uk/static/Docs/PyQt4/html/qstring.html">QString</a> id)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a href="../akonadi/Akonadi.ItemFetchScope.html">Akonadi.ItemFetchScope</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="#fetchScope">fetchScope</a> (self)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="#finishProcessing">finishProcessing</a> (self, <a href="../akonadi/Akonadi.PreprocessorBase.html#ProcessingResult">Akonadi.PreprocessorBase.ProcessingResult</a> result)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a href="../akonadi/Akonadi.PreprocessorBase.html#ProcessingResult">Akonadi.PreprocessorBase.ProcessingResult</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="#processItem">processItem</a> (self, <a href="../akonadi/Akonadi.Item.html">Akonadi.Item</a> item)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="#setFetchScope">setFetchScope</a> (self, <a href="../akonadi/Akonadi.ItemFetchScope.html">Akonadi.ItemFetchScope</a> fetchScope)</td></tr>
</table>
<hr><h2>Method Documentation</h2><a class="anchor" name="PreprocessorBase"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">__init__</td>
<td>(</td>
<td class="paramtype">&nbsp;<em>self</em>, </td>
<td class="paramname"></td>
</tr><tr>
<td class="memname"></td>
<td></td>
<td class="paramtype"><a href="http://www.riverbankcomputing.co.uk/static/Docs/PyQt4/html/qstring.html">QString</a>&nbsp;</td>
<td class="paramname"><em>id</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Creates a new preprocessor base agent.
</p>
<p>
</p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>id</em>&nbsp;</td><td> The instance id of the preprocessor base agent.
</td></tr>
</table></dl>
<p>
</p></div></div><a class="anchor" name="fetchScope"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"><a href="../akonadi/Akonadi.ItemFetchScope.html">Akonadi.ItemFetchScope</a> fetchScope</td>
<td>(</td>
<td class="paramtype">&nbsp;</td>
<td class="paramname"><em>self</em>&nbsp;)</td>
<td width="100%"> </td>
</tr>
</table>
</div>
<div class="memdoc"><p>Returns the item fetch scope.
</p>
<p>
Since this returns a reference it can be used to conveniently modify the
current scope in-place, i.e. by calling a method on the returned reference
without storing it in a local variable. See the ItemFetchScope documentation
for an example.
</p>
<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd> a reference to the current item fetch scope
</dd></dl> </p>
<p>
<dl class="see" compact><dt><b>See also:</b></dt><dd> setFetchScope() for replacing the current item fetch scope
</dd></dl>
</p></div></div><a class="anchor" name="finishProcessing"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> finishProcessing</td>
<td>(</td>
<td class="paramtype">&nbsp;<em>self</em>, </td>
<td class="paramname"></td>
</tr><tr>
<td class="memname"></td>
<td></td>
<td class="paramtype"><a href="../akonadi/Akonadi.PreprocessorBase.html#ProcessingResult">Akonadi.PreprocessorBase.ProcessingResult</a>&nbsp;</td>
<td class="paramname"><em>result</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>This method must be called if processing is implemented asynchronously.
</p>
<p>
You should call it when you have completed the processing
or if an abortRequest() signal arrives (and in this case you
will probably use ProcessingFailed as result).
</p>
<p>
Valid values for <b>result</b> are ProcessingCompleted,
PocessingRefused and ProcessingFailed. Passing any
other value will lead to a runtime assertion.
</p></div></div><a class="anchor" name="processItem"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"><a href="../akonadi/Akonadi.PreprocessorBase.html#ProcessingResult">Akonadi.PreprocessorBase.ProcessingResult</a> processItem</td>
<td>(</td>
<td class="paramtype">&nbsp;<em>self</em>, </td>
<td class="paramname"></td>
</tr><tr>
<td class="memname"></td>
<td></td>
<td class="paramtype"><a href="../akonadi/Akonadi.Item.html">Akonadi.Item</a>&nbsp;</td>
<td class="paramname"><em>item</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><dl compact><dt><b>Abstract method:</b></dt><dd>This method is abstract and can be overridden but not called directly.</dd></dl><p>This method must be implemented by every preprocessor subclass.
</p>
<p>
It must realize the preprocessing of the given <b>item.</b>
</p>
<p>
The Akonadi server will push in for preprocessing any newly created item:
it's your responsibility to decide if you want to process the item or not.
</p>
<p>
The method should return ProcessingCompleted on success, ProcessingDelayed
if processing is implemented asynchronously and
ProcessingRefused or ProcessingFailed if the processing
didn't complete.
</p>
<p>
If your operation is asynchronous then you should also
connect to the abortRequested() signal and handle it
appropriately (as the server MAY abort your async job
if it decides that it's taking too long).
</p></div></div><a class="anchor" name="setFetchScope"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> setFetchScope</td>
<td>(</td>
<td class="paramtype">&nbsp;<em>self</em>, </td>
<td class="paramname"></td>
</tr><tr>
<td class="memname"></td>
<td></td>
<td class="paramtype"><a href="../akonadi/Akonadi.ItemFetchScope.html">Akonadi.ItemFetchScope</a>&nbsp;</td>
<td class="paramname"><em>fetchScope</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Sets the item fetch scope.
</p>
<p>
The ItemFetchScope controls how much of an item's data is fetched
from the server, e.g. whether to fetch the full item payload or
only meta data.
</p>
<p>
</p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>fetchScope</em>&nbsp;</td><td> The new scope for item fetch operations.
</td></tr>
</table></dl>
<p> <dl class="see" compact><dt><b>See also:</b></dt><dd> fetchScope()
</dd></dl>
</p></div></div><hr><h2>Enumeration Documentation</h2><a class="anchor" name="ProcessingResult"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr><td class="memname">ProcessingResult</td>
</tr>
</table>
</div>
<div class="memdoc"><p>Describes the possible return values of the processItem() method.
</p><dl compact><dt><b>Enumerator: </b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0"><tr><td valign="top"><em>ProcessingCompleted</em>&nbsp;</td><td><tr><td valign="top"><em>ProcessingDelayed</em>&nbsp;</td><td><tr><td valign="top"><em>ProcessingFailed</em>&nbsp;</td><td><tr><td valign="top"><em>ProcessingRefused</em>&nbsp;</td><td></table>
</dl>
</div></div><p>
</div>
</div>
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