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ListenerHook.ListenerInfo
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org.osgi.framework.hooks.service</FONT>
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Interface ListenerHook.ListenerInfo</H2>
<DL>
<DT><B>Enclosing interface:</B><DD><A HREF="../../../../../org/osgi/framework/hooks/service/ListenerHook.html" title="interface in org.osgi.framework.hooks.service">ListenerHook</A></DD>
</DL>
<HR>
<DL>
<DT><PRE>public static interface <B>ListenerHook.ListenerInfo</B></DL>
</PRE>
<P>
Information about a Service Listener. This interface describes the bundle
which added the Service Listener and the filter with which it was added.
<P>
<P>
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<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/osgi/framework/hooks/service/ListenerHook.ListenerInfo.html#equals(java.lang.Object)">equals</A></B>(java.lang.Object obj)</CODE>
<BR>
Compares this <code>ListenerInfo</code> to another
<code>ListenerInfo</code>.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../../../../../org/osgi/framework/BundleContext.html" title="interface in org.osgi.framework">BundleContext</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/osgi/framework/hooks/service/ListenerHook.ListenerInfo.html#getBundleContext()">getBundleContext</A></B>()</CODE>
<BR>
Return the context of the bundle which added the listener.</TD>
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<CODE> java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/osgi/framework/hooks/service/ListenerHook.ListenerInfo.html#getFilter()">getFilter</A></B>()</CODE>
<BR>
Return the filter string with which the listener was added.</TD>
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<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/osgi/framework/hooks/service/ListenerHook.ListenerInfo.html#hashCode()">hashCode</A></B>()</CODE>
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Returns the hash code for this <code>ListenerInfo</code>.</TD>
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<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/osgi/framework/hooks/service/ListenerHook.ListenerInfo.html#isRemoved()">isRemoved</A></B>()</CODE>
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Return the state of the listener for this addition and removal life
cycle.</TD>
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<A NAME="getBundleContext()"><!-- --></A><H3>
getBundleContext</H3>
<PRE>
<A HREF="../../../../../org/osgi/framework/BundleContext.html" title="interface in org.osgi.framework">BundleContext</A> <B>getBundleContext</B>()</PRE>
<DL>
<DD>Return the context of the bundle which added the listener.
<P>
<DD><DL>
<DT><B>Returns:</B><DD>The context of the bundle which added the listener.</DL>
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<A NAME="getFilter()"><!-- --></A><H3>
getFilter</H3>
<PRE>
java.lang.String <B>getFilter</B>()</PRE>
<DL>
<DD>Return the filter string with which the listener was added.
<P>
<DD><DL>
<DT><B>Returns:</B><DD>The filter string with which the listener was added. This may
be <code>null</code> if the listener was added without a
filter.</DL>
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</DL>
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<A NAME="isRemoved()"><!-- --></A><H3>
isRemoved</H3>
<PRE>
boolean <B>isRemoved</B>()</PRE>
<DL>
<DD>Return the state of the listener for this addition and removal life
cycle. Initially this method will return <code>false</code>
indicating the listener has been added but has not been removed.
After the listener has been removed, this method must always return
<code>true</code>.
<p>
There is an extremely rare case in which removed notification to
<A HREF="../../../../../org/osgi/framework/hooks/service/ListenerHook.html" title="interface in org.osgi.framework.hooks.service"><CODE>ListenerHook</CODE></A>s can be made before added notification if two
threads are racing to add and remove the same service listener.
Because <A HREF="../../../../../org/osgi/framework/hooks/service/ListenerHook.html" title="interface in org.osgi.framework.hooks.service"><CODE>ListenerHook</CODE></A>s are called synchronously during service
listener addition and removal, the Framework cannot guarantee
in-order delivery of added and removed notification for a given
service listener. This method can be used to detect this rare
occurrence.
<P>
<DD><DL>
<DT><B>Returns:</B><DD><code>false</code> if the listener has not been been removed,
<code>true</code> otherwise.</DL>
</DD>
</DL>
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<A NAME="equals(java.lang.Object)"><!-- --></A><H3>
equals</H3>
<PRE>
boolean <B>equals</B>(java.lang.Object obj)</PRE>
<DL>
<DD>Compares this <code>ListenerInfo</code> to another
<code>ListenerInfo</code>. Two <code>ListenerInfo</code>s are equals
if they refer to the same listener for a given addition and removal
life cycle. If the same listener is added again, it must have a
different <code>ListenerInfo</code> which is not equal to this
<code>ListenerInfo</code>.
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE>equals</CODE> in class <CODE>java.lang.Object</CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>obj</CODE> - The object to compare against this
<code>ListenerInfo</code>.
<DT><B>Returns:</B><DD><code>true</code> if the other object is a
<code>ListenerInfo</code> object and both objects refer to
the same listener for a given addition and removal life
cycle.</DL>
</DD>
</DL>
<HR>
<A NAME="hashCode()"><!-- --></A><H3>
hashCode</H3>
<PRE>
int <B>hashCode</B>()</PRE>
<DL>
<DD>Returns the hash code for this <code>ListenerInfo</code>.
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE>hashCode</CODE> in class <CODE>java.lang.Object</CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>The hash code of this <code>ListenerInfo</code>.</DL>
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