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BundleTracker
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org.osgi.util.tracker</FONT>
<BR>
Class BundleTracker<T></H2>
<PRE>
java.lang.Object
<IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>org.osgi.util.tracker.BundleTracker<T></B>
</PRE>
<DL>
<DT><DT><B>Type Parameters:</B><DD><CODE>T</CODE> - The type of the tracked object.</DL>
<DL>
<DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../../../org/osgi/util/tracker/BundleTrackerCustomizer.html" title="interface in org.osgi.util.tracker">BundleTrackerCustomizer</A><T></DD>
</DL>
<HR>
<DL>
<DT><PRE>public class <B>BundleTracker<T></B><DT>extends java.lang.Object<DT>implements <A HREF="../../../../org/osgi/util/tracker/BundleTrackerCustomizer.html" title="interface in org.osgi.util.tracker">BundleTrackerCustomizer</A><T></DL>
</PRE>
<P>
The <code>BundleTracker</code> class simplifies tracking bundles much like
the <code>ServiceTracker</code> simplifies tracking services.
<p>
A <code>BundleTracker</code> is constructed with state criteria and a
<code>BundleTrackerCustomizer</code> object. A <code>BundleTracker</code> can
use the <code>BundleTrackerCustomizer</code> to select which bundles are
tracked and to create a customized object to be tracked with the bundle. The
<code>BundleTracker</code> can then be opened to begin tracking all bundles
whose state matches the specified state criteria.
<p>
The <code>getBundles</code> method can be called to get the
<code>Bundle</code> objects of the bundles being tracked. The
<code>getObject</code> method can be called to get the customized object for
a tracked bundle.
<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>
<P>
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<CODE>protected org.osgi.framework.BundleContext</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/osgi/util/tracker/BundleTracker.html#context">context</A></B></CODE>
<BR>
The Bundle Context used by this <code>BundleTracker</code>.</TD>
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<TD><CODE><B><A HREF="../../../../org/osgi/util/tracker/BundleTracker.html#BundleTracker(org.osgi.framework.BundleContext, int, org.osgi.util.tracker.BundleTrackerCustomizer)">BundleTracker</A></B>(org.osgi.framework.BundleContext context,
int stateMask,
<A HREF="../../../../org/osgi/util/tracker/BundleTrackerCustomizer.html" title="interface in org.osgi.util.tracker">BundleTrackerCustomizer</A><<A HREF="../../../../org/osgi/util/tracker/BundleTracker.html" title="type parameter in BundleTracker">T</A>> customizer)</CODE>
<BR>
Create a <code>BundleTracker</code> for bundles whose state is present in
the specified state mask.</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../../../../org/osgi/util/tracker/BundleTracker.html" title="type parameter in BundleTracker">T</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/osgi/util/tracker/BundleTracker.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>
Default implementation of the
<code>BundleTrackerCustomizer.addingBundle</code> method.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/osgi/util/tracker/BundleTracker.html#close()">close</A></B>()</CODE>
<BR>
Close this <code>BundleTracker</code>.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> org.osgi.framework.Bundle[]</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/osgi/util/tracker/BundleTracker.html#getBundles()">getBundles</A></B>()</CODE>
<BR>
Return an array of <code>Bundle</code>s for all bundles being tracked by
this <code>BundleTracker</code>.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../../../../org/osgi/util/tracker/BundleTracker.html" title="type parameter in BundleTracker">T</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/osgi/util/tracker/BundleTracker.html#getObject(org.osgi.framework.Bundle)">getObject</A></B>(org.osgi.framework.Bundle bundle)</CODE>
<BR>
Returns the customized object for the specified <code>Bundle</code> if
the specified bundle is being tracked by this <code>BundleTracker</code>.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> java.util.Map<org.osgi.framework.Bundle,<A HREF="../../../../org/osgi/util/tracker/BundleTracker.html" title="type parameter in BundleTracker">T</A>></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/osgi/util/tracker/BundleTracker.html#getTracked()">getTracked</A></B>()</CODE>
<BR>
Return a <code>Map</code> with the <code>Bundle</code>s and customized
objects for all bundles being tracked by this <code>BundleTracker</code>.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/osgi/util/tracker/BundleTracker.html#getTrackingCount()">getTrackingCount</A></B>()</CODE>
<BR>
Returns the tracking count for this <code>BundleTracker</code>.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/osgi/util/tracker/BundleTracker.html#isEmpty()">isEmpty</A></B>()</CODE>
<BR>
Return if this <code>BundleTracker</code> is empty.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/osgi/util/tracker/BundleTracker.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/BundleTracker.html" title="type parameter in BundleTracker">T</A> object)</CODE>
<BR>
Default implementation of the
<code>BundleTrackerCustomizer.modifiedBundle</code> method.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/osgi/util/tracker/BundleTracker.html#open()">open</A></B>()</CODE>
<BR>
Open this <code>BundleTracker</code> and begin tracking bundles.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/osgi/util/tracker/BundleTracker.html#remove(org.osgi.framework.Bundle)">remove</A></B>(org.osgi.framework.Bundle bundle)</CODE>
<BR>
Remove a bundle from this <code>BundleTracker</code>.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/osgi/util/tracker/BundleTracker.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/BundleTracker.html" title="type parameter in BundleTracker">T</A> object)</CODE>
<BR>
Default implementation of the
<code>BundleTrackerCustomizer.removedBundle</code> method.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/osgi/util/tracker/BundleTracker.html#size()">size</A></B>()</CODE>
<BR>
Return the number of bundles being tracked by this
<code>BundleTracker</code>.</TD>
</TR>
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<TH ALIGN="left"><B>Methods inherited from class java.lang.Object</B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD>
</TR>
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<A NAME="context"><!-- --></A><H3>
context</H3>
<PRE>
protected final org.osgi.framework.BundleContext <B>context</B></PRE>
<DL>
<DD>The Bundle Context used by this <code>BundleTracker</code>.
<P>
<DL>
</DL>
</DL>
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<A NAME="BundleTracker(org.osgi.framework.BundleContext, int, org.osgi.util.tracker.BundleTrackerCustomizer)"><!-- --></A><H3>
BundleTracker</H3>
<PRE>
public <B>BundleTracker</B>(org.osgi.framework.BundleContext context,
int stateMask,
<A HREF="../../../../org/osgi/util/tracker/BundleTrackerCustomizer.html" title="interface in org.osgi.util.tracker">BundleTrackerCustomizer</A><<A HREF="../../../../org/osgi/util/tracker/BundleTracker.html" title="type parameter in BundleTracker">T</A>> customizer)</PRE>
<DL>
<DD>Create a <code>BundleTracker</code> for bundles whose state is present in
the specified state mask.
<p>
Bundles whose state is present on the specified state mask will be
tracked by this <code>BundleTracker</code>.
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>context</CODE> - The <code>BundleContext</code> against which the tracking
is done.<DD><CODE>stateMask</CODE> - The bit mask of the <code>OR</code>ing of the bundle
states to be tracked.<DD><CODE>customizer</CODE> - The customizer object to call when bundles are added,
modified, or removed in this <code>BundleTracker</code>. If
customizer is <code>null</code>, then this
<code>BundleTracker</code> will be used as the
<code>BundleTrackerCustomizer</code> and this
<code>BundleTracker</code> will call the
<code>BundleTrackerCustomizer</code> methods on itself.<DT><B>See Also:</B><DD><CODE>Bundle.getState()</CODE></DL>
</DL>
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<A NAME="open()"><!-- --></A><H3>
open</H3>
<PRE>
public void <B>open</B>()</PRE>
<DL>
<DD>Open this <code>BundleTracker</code> and begin tracking bundles.
<p>
Bundle which match the state criteria specified when this
<code>BundleTracker</code> was created are now tracked by this
<code>BundleTracker</code>.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Throws:</B>
<DD><CODE>java.lang.IllegalStateException</CODE> - If the <code>BundleContext</code>
with which this <code>BundleTracker</code> was created is no
longer valid.
<DD><CODE>java.lang.SecurityException</CODE> - If the caller and this class do not
have the appropriate
<code>AdminPermission[context bundle,LISTENER]</code>, and the
Java Runtime Environment supports permissions.</DL>
</DD>
</DL>
<HR>
<A NAME="close()"><!-- --></A><H3>
close</H3>
<PRE>
public void <B>close</B>()</PRE>
<DL>
<DD>Close this <code>BundleTracker</code>.
<p>
This method should be called when this <code>BundleTracker</code> should
end the tracking of bundles.
<p>
This implementation calls <A HREF="../../../../org/osgi/util/tracker/BundleTracker.html#getBundles()"><CODE>getBundles()</CODE></A> to get the list of
tracked bundles to remove.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="addingBundle(org.osgi.framework.Bundle, org.osgi.framework.BundleEvent)"><!-- --></A><H3>
addingBundle</H3>
<PRE>
public <A HREF="../../../../org/osgi/util/tracker/BundleTracker.html" title="type parameter in BundleTracker">T</A> <B>addingBundle</B>(org.osgi.framework.Bundle bundle,
org.osgi.framework.BundleEvent event)</PRE>
<DL>
<DD>Default implementation of the
<code>BundleTrackerCustomizer.addingBundle</code> method.
<p>
This method is only called when this <code>BundleTracker</code> has been
constructed with a <code>null BundleTrackerCustomizer</code> argument.
<p>
This implementation simply returns the specified <code>Bundle</code>.
<p>
This method can be overridden in a subclass to customize the object to be
tracked for the bundle being added.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/osgi/util/tracker/BundleTrackerCustomizer.html#addingBundle(org.osgi.framework.Bundle, org.osgi.framework.BundleEvent)">addingBundle</A></CODE> in interface <CODE><A HREF="../../../../org/osgi/util/tracker/BundleTrackerCustomizer.html" title="interface in org.osgi.util.tracker">BundleTrackerCustomizer</A><<A HREF="../../../../org/osgi/util/tracker/BundleTracker.html" title="type parameter in BundleTracker">T</A>></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>bundle</CODE> - The <code>Bundle</code> being added to this
<code>BundleTracker</code> object.<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 specified bundle.<DT><B>See Also:</B><DD><A HREF="../../../../org/osgi/util/tracker/BundleTrackerCustomizer.html#addingBundle(org.osgi.framework.Bundle, org.osgi.framework.BundleEvent)"><CODE>BundleTrackerCustomizer.addingBundle(Bundle, BundleEvent)</CODE></A></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>
public void <B>modifiedBundle</B>(org.osgi.framework.Bundle bundle,
org.osgi.framework.BundleEvent event,
<A HREF="../../../../org/osgi/util/tracker/BundleTracker.html" title="type parameter in BundleTracker">T</A> object)</PRE>
<DL>
<DD>Default implementation of the
<code>BundleTrackerCustomizer.modifiedBundle</code> method.
<p>
This method is only called when this <code>BundleTracker</code> has been
constructed with a <code>null BundleTrackerCustomizer</code> argument.
<p>
This implementation does nothing.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/osgi/util/tracker/BundleTrackerCustomizer.html#modifiedBundle(org.osgi.framework.Bundle, org.osgi.framework.BundleEvent, T)">modifiedBundle</A></CODE> in interface <CODE><A HREF="../../../../org/osgi/util/tracker/BundleTrackerCustomizer.html" title="interface in org.osgi.util.tracker">BundleTrackerCustomizer</A><<A HREF="../../../../org/osgi/util/tracker/BundleTracker.html" title="type parameter in BundleTracker">T</A>></CODE></DL>
</DD>
<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 customized object for the specified Bundle.<DT><B>See Also:</B><DD><A HREF="../../../../org/osgi/util/tracker/BundleTrackerCustomizer.html#modifiedBundle(org.osgi.framework.Bundle, org.osgi.framework.BundleEvent, T)"><CODE>BundleTrackerCustomizer.modifiedBundle(Bundle, BundleEvent, Object)</CODE></A></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>
public void <B>removedBundle</B>(org.osgi.framework.Bundle bundle,
org.osgi.framework.BundleEvent event,
<A HREF="../../../../org/osgi/util/tracker/BundleTracker.html" title="type parameter in BundleTracker">T</A> object)</PRE>
<DL>
<DD>Default implementation of the
<code>BundleTrackerCustomizer.removedBundle</code> method.
<p>
This method is only called when this <code>BundleTracker</code> has been
constructed with a <code>null BundleTrackerCustomizer</code> argument.
<p>
This implementation does nothing.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/osgi/util/tracker/BundleTrackerCustomizer.html#removedBundle(org.osgi.framework.Bundle, org.osgi.framework.BundleEvent, T)">removedBundle</A></CODE> in interface <CODE><A HREF="../../../../org/osgi/util/tracker/BundleTrackerCustomizer.html" title="interface in org.osgi.util.tracker">BundleTrackerCustomizer</A><<A HREF="../../../../org/osgi/util/tracker/BundleTracker.html" title="type parameter in BundleTracker">T</A>></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>bundle</CODE> - The <code>Bundle</code> being 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 customized object for the specified bundle.<DT><B>See Also:</B><DD><A HREF="../../../../org/osgi/util/tracker/BundleTrackerCustomizer.html#removedBundle(org.osgi.framework.Bundle, org.osgi.framework.BundleEvent, T)"><CODE>BundleTrackerCustomizer.removedBundle(Bundle, BundleEvent, Object)</CODE></A></DL>
</DD>
</DL>
<HR>
<A NAME="getBundles()"><!-- --></A><H3>
getBundles</H3>
<PRE>
public org.osgi.framework.Bundle[] <B>getBundles</B>()</PRE>
<DL>
<DD>Return an array of <code>Bundle</code>s for all bundles being tracked by
this <code>BundleTracker</code>.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>An array of <code>Bundle</code>s or <code>null</code> if no
bundles are being tracked.</DL>
</DD>
</DL>
<HR>
<A NAME="getObject(org.osgi.framework.Bundle)"><!-- --></A><H3>
getObject</H3>
<PRE>
public <A HREF="../../../../org/osgi/util/tracker/BundleTracker.html" title="type parameter in BundleTracker">T</A> <B>getObject</B>(org.osgi.framework.Bundle bundle)</PRE>
<DL>
<DD>Returns the customized object for the specified <code>Bundle</code> if
the specified bundle is being tracked by this <code>BundleTracker</code>.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>bundle</CODE> - The <code>Bundle</code> being tracked.
<DT><B>Returns:</B><DD>The customized object for the specified <code>Bundle</code> or
<code>null</code> if the specified <code>Bundle</code> is not
being tracked.</DL>
</DD>
</DL>
<HR>
<A NAME="remove(org.osgi.framework.Bundle)"><!-- --></A><H3>
remove</H3>
<PRE>
public void <B>remove</B>(org.osgi.framework.Bundle bundle)</PRE>
<DL>
<DD>Remove a bundle from this <code>BundleTracker</code>.
The specified bundle will be removed from this <code>BundleTracker</code>
. If the specified bundle was being tracked then the
<code>BundleTrackerCustomizer.removedBundle</code> method will be called
for that bundle.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>bundle</CODE> - The <code>Bundle</code> to be removed.</DL>
</DD>
</DL>
<HR>
<A NAME="size()"><!-- --></A><H3>
size</H3>
<PRE>
public int <B>size</B>()</PRE>
<DL>
<DD>Return the number of bundles being tracked by this
<code>BundleTracker</code>.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>The number of bundles being tracked.</DL>
</DD>
</DL>
<HR>
<A NAME="getTrackingCount()"><!-- --></A><H3>
getTrackingCount</H3>
<PRE>
public int <B>getTrackingCount</B>()</PRE>
<DL>
<DD>Returns the tracking count for this <code>BundleTracker</code>.
The tracking count is initialized to 0 when this <code>BundleTracker</code> is
opened. Every time a bundle is added, modified or removed from this
<code>BundleTracker</code> the tracking count is incremented.
<p>
The tracking count can be used to determine if this <code>BundleTracker</code>
has added, modified or removed a bundle by comparing a tracking count
value previously collected with the current tracking count value. If the
value has not changed, then no bundle has been added, modified or removed
from this <code>BundleTracker</code> since the previous tracking count was
collected.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>The tracking count for this <code>BundleTracker</code> or -1 if this
<code>BundleTracker</code> is not open.</DL>
</DD>
</DL>
<HR>
<A NAME="getTracked()"><!-- --></A><H3>
getTracked</H3>
<PRE>
public java.util.Map<org.osgi.framework.Bundle,<A HREF="../../../../org/osgi/util/tracker/BundleTracker.html" title="type parameter in BundleTracker">T</A>> <B>getTracked</B>()</PRE>
<DL>
<DD>Return a <code>Map</code> with the <code>Bundle</code>s and customized
objects for all bundles being tracked by this <code>BundleTracker</code>.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>A <code>Map</code> with the <code>Bundle</code>s and customized
objects for all services being tracked by this
<code>BundleTracker</code>. If no bundles are being tracked, then
the returned map is empty.<DT><B>Since:</B></DT>
<DD>1.5</DD>
</DL>
</DD>
</DL>
<HR>
<A NAME="isEmpty()"><!-- --></A><H3>
isEmpty</H3>
<PRE>
public boolean <B>isEmpty</B>()</PRE>
<DL>
<DD>Return if this <code>BundleTracker</code> is empty.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD><code>true</code> if this <code>BundleTracker</code> is not tracking any
bundles.<DT><B>Since:</B></DT>
<DD>1.5</DD>
</DL>
</DD>
</DL>
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