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<?xml version="1.0" encoding="iso-8859-1" ?> 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">  
<!--http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd-->  
<html xmlns="http://www.w3.org/1999/xhtml"  
> 
<head><title>DBusExecutionException</title> 
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> 
<meta name="generator" content="TeX4ht (http://www.cse.ohio-state.edu/~gurari/TeX4ht/)" /> 
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<meta name="date" content="2014-02-01 19:41:00" /> 
<link rel="stylesheet" type="text/css" href="dbus-java.css" /> 
</head><body 
>
   <!--l. 374--><div class="crosslinks"><p class="noindent">[<a 
href="dbus-javase4.html" >prev</a>] [<a 
href="dbus-javase4.html#taildbus-javase4.html" >prev-tail</a>] [<a 
href="dbus-javase2.html#taildbus-javase5.html">tail</a>] [<a 
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   <h3 class="sectionHead"><span class="titlemark">5   </span> <a 
 id="x20-180005"></a>DBusExecutionException</h3>
<!--l. 376--><p class="noindent" >If you wish to report an error condition in a method call you can throw an instance of
<span 
class="cmtt-12">DBusExecutionException</span><span class="footnote-mark"><a 
href="dbus-java21.html#fn12x0"><sup class="textsuperscript">12</sup></a></span><a 
 id="x20-18001f12"></a> .
This will be sent back to the caller as an error message, and the error name is taken from the
class name of the exception. For example, if you wanted to report an unknown method you
would define an exception as in figure <a 
href="#x20-180026">6<!--tex4ht:ref: fig:exceptiondef --></a> and then throw it in your method as in figure
<a 
href="#x20-180037">7<!--tex4ht:ref: fig:exceptioncall --></a>.
</p>
   <hr class="figure" /><div class="figure" 
>
                                                                                      
                                                                                      
<a 
 id="x20-180026"></a>
                                                                                      
                                                                                      
<div class="center" 
>
<!--l. 386--><p class="noindent" >
                                                                                      
                                                                                      
</p>
<div class="verbatim" id="verbatim-12">
package&#x00A0;org.freedesktop.DBus.Error;
&#x00A0;<br />import&#x00A0;org.freedesktop.dbus.exceptions.DBusExecutionException;
&#x00A0;<br />
&#x00A0;<br />public&#x00A0;class&#x00A0;UnknownMethod&#x00A0;extends&#x00A0;DBusExecutionException
&#x00A0;<br />{
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;public&#x00A0;UnknownMethod(String&#x00A0;message)
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;{
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;super(message);
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;}
&#x00A0;<br />}
</div>
<!--l. 398--><p class="nopar" ></p></div>
<br /> <div class="caption" 
><span class="id">Figure&#x00A0;6: </span><span  
class="content">An Exception</span></div><!--tex4ht:label?: x20-180026 -->
                                                                                      
                                                                                      
   </div><hr class="endfigure" />
   <hr class="figure" /><div class="figure" 
>
                                                                                      
                                                                                      
<a 
 id="x20-180037"></a>
                                                                                      
                                                                                      
<div class="center" 
>
<!--l. 405--><p class="noindent" >
                                                                                      
                                                                                      
</p>
<div class="verbatim" id="verbatim-13">
...
&#x00A0;<br />public&#x00A0;void&#x00A0;throwme()&#x00A0;throws&#x00A0;org.freedesktop.DBus.Error.UnknownMethod
&#x00A0;<br />{
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;throw&#x00A0;new&#x00A0;org.freedesktop.DBus.Error.UnknownMethod("hi");
&#x00A0;<br />}
&#x00A0;<br />...
</div>
<!--l. 413--><p class="nopar" ></p></div>
<br /> <div class="caption" 
><span class="id">Figure&#x00A0;7: </span><span  
class="content">Throwing An Exception</span></div><!--tex4ht:label?: x20-180037 -->
                                                                                      
                                                                                      
   </div><hr class="endfigure" />
<!--l. 419--><p class="indent" >   If you are calling a remote method and you want to handle such an error you can simply
catch the exception as in figure <a 
href="#x20-180048">8<!--tex4ht:ref: fig:exceptioncatch --></a>.
</p>
   <hr class="figure" /><div class="figure" 
>
                                                                                      
                                                                                      
<a 
 id="x20-180048"></a>
                                                                                      
                                                                                      
<div class="center" 
>
<!--l. 423--><p class="noindent" >
                                                                                      
                                                                                      
</p>
<div class="verbatim" id="verbatim-14">
...
&#x00A0;<br />try&#x00A0;{
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;remote.throwme();
&#x00A0;<br />}&#x00A0;catch&#x00A0;(org.freedesktop.DBus.Error.UnknownMethod&#x00A0;UM)&#x00A0;{
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;...
&#x00A0;<br />}
&#x00A0;<br />...
</div>
<!--l. 432--><p class="nopar" ></p></div>
<br /> <div class="caption" 
><span class="id">Figure&#x00A0;8: </span><span  
class="content">Catching An Exception</span></div><!--tex4ht:label?: x20-180048 -->
                                                                                      
                                                                                      
   </div><hr class="endfigure" />
                                                                                      
                                                                                      
   <!--l. 438--><div class="crosslinks"><p class="noindent">[<a 
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href="dbus-javase5.html" >front</a>] [<a 
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<!--l. 438--><p class="indent" >   <a 
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