Helper DalvikUsage

Jan Burse, created Apr 18. 2019
package matula.util.android;
import matula.util.data.AssocArray;
/**
* <p>Dalvik memory usage events.</p>
* <p/>
* Warranty & Liability
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* otherwise agreed upon, XLOG Technologies GmbH makes no warranties
* regarding the provided information. XLOG Technologies GmbH assumes
* no liability that any problems might be solved with the information
* provided by XLOG Technologies GmbH.
* <p/>
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* and patent rights in particular - are the sole property of XLOG
* Technologies GmbH. If the company was not the originator of some
* excerpts, XLOG Technologies GmbH has at least obtained the right to
* reproduce, change and translate the information.
* <p/>
* Reproduction is restricted to the whole unaltered document. Reproduction
* of the information is only allowed for non-commercial uses. Selling,
* giving away or letting of the execution of the library is prohibited.
* The library can be distributed as part of your applications and libraries
* for execution provided this comment remains unchanged.
* <p/>
* Restrictions
* Only to be distributed with programs that add significant and primary
* functionality to the library. Not to be distributed with additional
* software intended to replace any components of the library.
* <p/>
* Trademarks
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*/
public final class DalvikUsage {
public static DalvikUsage DEFAULT = new DalvikUsage();
private final AssocArray<NotificationListener, Object> listeners
= new AssocArray<NotificationListener, Object>();
/**
* <p>Create a dalvik usage.</p>
*/
private DalvikUsage() {
/* do nothing */
}
/**
* <p>Add a notification listener.</p>
*
* @param listener The listener.
* @param handback The handback.
*/
public final void addListener(NotificationListener listener, Object handback) {
synchronized (listeners) {
listeners.add(listener, handback);
}
}
/**
* <p>Remove a notification listener.</p>
*
* @param listener The listener.
*/
public final void removeListener(NotificationListener listener, Object handback) {
synchronized (listeners) {
for (int i = 0; i < listeners.size(); i++) {
if (listeners.getKey(i) != listener)
continue;
if (listeners.getValue(i) != handback)
continue;
listeners.remove(i);
return;
}
}
}
/**
* <p>Fire the notification listeners.</p>
*/
public final void fireListeners() {
NotificationListener[] snapshot;
Object[] snapshot2;
synchronized (listeners) {
snapshot = new NotificationListener[listeners.size()];
snapshot2 = new Object[listeners.size()];
listeners.toArray(snapshot, snapshot2);
}
for (int i = 0; i < snapshot.length; i++) {
NotificationListener listener = snapshot[i];
Object handback = snapshot2[i];
listener.handleNotification(handback);
}
}
}

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