client/src/main/java/org/apache/hupa/client/activity/AppBaseActivity.java

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package org.apache.hupa.client.activity;

import java.util.ArrayList;
import java.util.List;

import org.apache.hupa.client.HupaController;
import org.apache.hupa.client.rf.HupaRequestFactory;

import com.google.gwt.activity.shared.AbstractActivity;
import com.google.gwt.event.shared.EventBus;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.place.shared.PlaceController;
import com.google.inject.Inject;

public abstract class AppBaseActivity extends AbstractActivity {

    @Inject protected EventBus eventBus;
    @Inject protected HupaController hc;
    @Inject protected PlaceController pc;
    @Inject protected HupaRequestFactory rf;

    protected List<HandlerRegistration> registrations = new ArrayList<HandlerRegistration>();

    @Override
    public void onStop() {
        for (HandlerRegistration registration : registrations) {
            if(registration != null){
                registration.removeHandler();
            }
        }
        registrations.clear();
    }

    protected void registerHandler(HandlerRegistration handlerRegistration) {
        registrations.add(handlerRegistration);
    }

    public String mayStop() {
        return null;
    }

    public void onCancel() {
    }
}