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BundleTrackerCustomizer
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org.osgi.util.tracker</FONT>
<BR>
Interface BundleTrackerCustomizer<T></H2>
<DL>
<DT><DT><B>Type Parameters:</B><DD><CODE>T</CODE> - The type of the tracked object.</DL>
<DL>
<DT><B>All Known Implementing Classes:</B> <DD><A HREF="../../../../org/osgi/util/tracker/BundleTracker.html" title="class in org.osgi.util.tracker">BundleTracker</A></DD>
</DL>
<HR>
<DL>
<DT><PRE>public interface <B>BundleTrackerCustomizer<T></B></DL>
</PRE>
<P>
The <code>BundleTrackerCustomizer</code> interface allows a
<code>BundleTracker</code> to customize the <code>Bundle</code>s that are
tracked. A <code>BundleTrackerCustomizer</code> is called when a bundle is
being added to a <code>BundleTracker</code>. The
<code>BundleTrackerCustomizer</code> can then return an object for the
tracked bundle. A <code>BundleTrackerCustomizer</code> is also called when a
tracked bundle is modified or has been removed from a
<code>BundleTracker</code>.
<p>
The methods in this interface may be called as the result of a
<code>BundleEvent</code> being received by a <code>BundleTracker</code>.
Since <code>BundleEvent</code>s are received synchronously by the
<code>BundleTracker</code>, it is highly recommended that implementations of
these methods do not alter bundle states while being synchronized on any
object.
<p>
The <code>BundleTracker</code> class is thread-safe. It does not call a
<code>BundleTrackerCustomizer</code> while holding any locks.
<code>BundleTrackerCustomizer</code> implementations must also be
thread-safe.
<P>
<P>
<DL>
<DT><B>Since:</B></DT>
<DD>1.4</DD>
</DL>
<HR>
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<CODE> <A HREF="../../../../org/osgi/util/tracker/BundleTrackerCustomizer.html" title="type parameter in BundleTrackerCustomizer">T</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/osgi/util/tracker/BundleTrackerCustomizer.html#addingBundle(org.osgi.framework.Bundle, org.osgi.framework.BundleEvent)">addingBundle</A></B>(org.osgi.framework.Bundle bundle,
org.osgi.framework.BundleEvent event)</CODE>
<BR>
A bundle is being added to the <code>BundleTracker</code>.</TD>
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<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/osgi/util/tracker/BundleTrackerCustomizer.html#modifiedBundle(org.osgi.framework.Bundle, org.osgi.framework.BundleEvent, T)">modifiedBundle</A></B>(org.osgi.framework.Bundle bundle,
org.osgi.framework.BundleEvent event,
<A HREF="../../../../org/osgi/util/tracker/BundleTrackerCustomizer.html" title="type parameter in BundleTrackerCustomizer">T</A> object)</CODE>
<BR>
A bundle tracked by the <code>BundleTracker</code> has been modified.</TD>
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<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/osgi/util/tracker/BundleTrackerCustomizer.html#removedBundle(org.osgi.framework.Bundle, org.osgi.framework.BundleEvent, T)">removedBundle</A></B>(org.osgi.framework.Bundle bundle,
org.osgi.framework.BundleEvent event,
<A HREF="../../../../org/osgi/util/tracker/BundleTrackerCustomizer.html" title="type parameter in BundleTrackerCustomizer">T</A> object)</CODE>
<BR>
A bundle tracked by the <code>BundleTracker</code> has been removed.</TD>
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<A NAME="addingBundle(org.osgi.framework.Bundle, org.osgi.framework.BundleEvent)"><!-- --></A><H3>
addingBundle</H3>
<PRE>
<A HREF="../../../../org/osgi/util/tracker/BundleTrackerCustomizer.html" title="type parameter in BundleTrackerCustomizer">T</A> <B>addingBundle</B>(org.osgi.framework.Bundle bundle,
org.osgi.framework.BundleEvent event)</PRE>
<DL>
<DD>A bundle is being added to the <code>BundleTracker</code>.
<p>
This method is called before a bundle which matched the search parameters
of the <code>BundleTracker</code> is added to the
<code>BundleTracker</code>. This method should return the object to be
tracked for the specified <code>Bundle</code>. The returned object is
stored in the <code>BundleTracker</code> and is available from the
<A HREF="../../../../org/osgi/util/tracker/BundleTracker.html#getObject(org.osgi.framework.Bundle)"><CODE>getObject</CODE></A> method.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>bundle</CODE> - The <code>Bundle</code> being added to the
<code>BundleTracker</code>.<DD><CODE>event</CODE> - The bundle event which caused this customizer method to be
called or <code>null</code> if there is no bundle event associated
with the call to this method.
<DT><B>Returns:</B><DD>The object to be tracked for the specified <code>Bundle</code>
object or <code>null</code> if the specified <code>Bundle</code>
object should not be tracked.</DL>
</DD>
</DL>
<HR>
<A NAME="modifiedBundle(org.osgi.framework.Bundle,org.osgi.framework.BundleEvent,java.lang.Object)"><!-- --></A><A NAME="modifiedBundle(org.osgi.framework.Bundle, org.osgi.framework.BundleEvent, T)"><!-- --></A><H3>
modifiedBundle</H3>
<PRE>
void <B>modifiedBundle</B>(org.osgi.framework.Bundle bundle,
org.osgi.framework.BundleEvent event,
<A HREF="../../../../org/osgi/util/tracker/BundleTrackerCustomizer.html" title="type parameter in BundleTrackerCustomizer">T</A> object)</PRE>
<DL>
<DD>A bundle tracked by the <code>BundleTracker</code> has been modified.
<p>
This method is called when a bundle being tracked by the
<code>BundleTracker</code> has had its state modified.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>bundle</CODE> - The <code>Bundle</code> whose state has been modified.<DD><CODE>event</CODE> - The bundle event which caused this customizer method to be
called or <code>null</code> if there is no bundle event associated
with the call to this method.<DD><CODE>object</CODE> - The tracked object for the specified bundle.</DL>
</DD>
</DL>
<HR>
<A NAME="removedBundle(org.osgi.framework.Bundle,org.osgi.framework.BundleEvent,java.lang.Object)"><!-- --></A><A NAME="removedBundle(org.osgi.framework.Bundle, org.osgi.framework.BundleEvent, T)"><!-- --></A><H3>
removedBundle</H3>
<PRE>
void <B>removedBundle</B>(org.osgi.framework.Bundle bundle,
org.osgi.framework.BundleEvent event,
<A HREF="../../../../org/osgi/util/tracker/BundleTrackerCustomizer.html" title="type parameter in BundleTrackerCustomizer">T</A> object)</PRE>
<DL>
<DD>A bundle tracked by the <code>BundleTracker</code> has been removed.
<p>
This method is called after a bundle is no longer being tracked by the
<code>BundleTracker</code>.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>bundle</CODE> - The <code>Bundle</code> that has been removed.<DD><CODE>event</CODE> - The bundle event which caused this customizer method to be
called or <code>null</code> if there is no bundle event associated
with the call to this method.<DD><CODE>object</CODE> - The tracked object for the specified bundle.</DL>
</DD>
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