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package org.singinst.uf.presenter;
import java.util.ArrayList;
import java.util.List;
import org.singinst.uf.model.ValueListener;
public class Completion {
private static Completion singleton = new Completion();
private String display;
private int numStages;
private int completed;
private List<ValueListener> listeners = new ArrayList<ValueListener>();
public static Completion getInstance() {
return singleton;
}
public synchronized boolean init(String display, int numStages) {
if (completed < this.numStages) {
return false;
}
this.display = display;
this.numStages = numStages;
completed = 0;
fireUpdate();
return true;
}
private void fireUpdate() {
for (ValueListener valueListener : listeners) {
valueListener.fireUpdate(0);
}
}
public synchronized void tick() {
completed++;
fireUpdate();
}
public synchronized int getCompleted() {
return completed;
}
public synchronized int getNumStages() {
return numStages;
}
public void addUpdateListener(ValueListener valueListener) {
listeners.add(valueListener);
}
public String getDisplay() {
return display;
}
public void destroy() {
listeners.clear();
}
}
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