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MID Profile: Interface Controllable
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javax.microedition.media</FONT>
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Interface Controllable</H2>
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<DT><B>All Known Subinterfaces:</B> <DD><A HREF="../../../javax/microedition/media/Player.html">Player</A></DD>
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<DT>public interface <B>Controllable</B></DL>
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<code>Controllable</code> provides an interface for obtaining the <code>Control</code>s from an object like a <code>Player</code>. It provides methods to query all the supported <code>Control</code>s and to obtain a particular <code>Control</code> based on its class name.
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<CODE> <A HREF="../../../javax/microedition/media/Control.html">Control</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/media/Controllable.html#getControl(java.lang.String)">getControl</A></B>(<A HREF="../../../java/lang/String.html">String</A> controlType)</CODE>
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Obtain the object that implements the specified <code>Control</code> interface.</TD>
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<CODE> <A HREF="../../../javax/microedition/media/Control.html">Control</A>[]</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/media/Controllable.html#getControls()">getControls</A></B>()</CODE>
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Obtain the collection of <code>Control</code>s from the object that implements this interface.</TD>
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<A NAME="getControls()"><!-- --></A><H3>
getControls</H3>
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public <A HREF="../../../javax/microedition/media/Control.html">Control</A>[] <B>getControls</B>()</PRE>
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<DD>Obtain the collection of <code>Control</code>s from the object that implements this interface. <p> Since a single object can implement multiple <code>Control</code> interfaces, it's necessary to check each object against different <code>Control</code> types. For example: <p> <code> Controllable controllable;<br> :<br> Control cs[];<br> cs = controllable.getControls();<br> for (int i = 0; i < cs.length; i++) {<br> if (cs[i] instanceof ControlTypeA)<br> doSomethingA();<br> if (cs[i] instanceof ControlTypeB)<br> doSomethingB();<br> // etc. <br> }<br> </code> <p> The list of <code>Control</code> objects returned will not contain any duplicates. And the list will not change over time. <p> If no <code>Control</code> is supported, a zero length array is returned.<DD><DL>
<DT><B>Returns:</B><DD>the collection of <code>Control</code> objects.<DT><B>Throws:</B><DD><CODE><A HREF="../../../java/lang/IllegalStateException.html">IllegalStateException</A></CODE> - Thrown if <code>getControls</code> is called in a wrong state. See <a href="Player.html#controls"><code>Player</code></a> for more details.</DL>
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getControl</H3>
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public <A HREF="../../../javax/microedition/media/Control.html">Control</A> <B>getControl</B>(<A HREF="../../../java/lang/String.html">String</A> controlType)</PRE>
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<DD>Obtain the object that implements the specified <code>Control</code> interface. <p> If the specified <code>Control</code> interface is not supported then <code>null</code> is returned. <p> If the <code>Controllable</code> supports multiple objects that implement the same specified <code>Control</code> interface, only one of them will be returned. To obtain all the <code>Control</code>'s of that type, use the <code>getControls</code> method and check the list for the requested type.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>controlType</CODE> - the class name of the <code>Control</code>. The class name should be given either as the fully-qualified name of the class; or if the package of the class is not given, the package <code>javax.microedition.media.control</code> is assumed.<DT><B>Returns:</B><DD>the object that implements the control, or <code>null</code>.<DT><B>Throws:</B><DD><CODE><A HREF="../../../java/lang/IllegalArgumentException.html">IllegalArgumentException</A></CODE> - Thrown if <code>controlType</code> is <code>null</code>.<DD><CODE><A HREF="../../../java/lang/IllegalStateException.html">IllegalStateException</A></CODE> - Thrown if <code>getControl</code> is called in a wrong state. See <a href="Player.html#controls"><code>Player</code></a> for more details.</DL>
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