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package se.leap.bitmaskclient.base.models;
import androidx.annotation.NonNull;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
/**
* Created by cyberta on 05.12.18.
*/
public class ProviderObservable {
private static ProviderObservable instance;
private final PropertyChangeSupport changeSupport;
public static final String PROPERTY_CHANGE = "ProviderObservable";
private Provider currentProvider;
private Provider providerForDns;
public static ProviderObservable getInstance() {
if (instance == null) {
instance = new ProviderObservable();
}
return instance;
}
private ProviderObservable() {
changeSupport = new PropertyChangeSupport(this);
currentProvider = new Provider();
}
public void addObserver(PropertyChangeListener propertyChangeListener) {
changeSupport.addPropertyChangeListener(propertyChangeListener);
}
public void deleteObserver(PropertyChangeListener propertyChangeListener) {
changeSupport.removePropertyChangeListener(propertyChangeListener);
}
public synchronized void updateProvider(@NonNull Provider provider) {
instance.currentProvider = provider;
instance.providerForDns = null;
instance.changeSupport.firePropertyChange(PROPERTY_CHANGE, null, provider);
}
public Provider getCurrentProvider() {
return instance.currentProvider;
}
public void setProviderForDns(Provider provider) {
this.providerForDns = provider;
}
public Provider getProviderForDns() {
return instance.providerForDns;
}
}
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