com.imaginedreal.mgwt.trafficflow.client.AppMainActivityMapper.java Source code

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Here is the source code for com.imaginedreal.mgwt.trafficflow.client.AppMainActivityMapper.java

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/*
 * Copyright 2015 Wayne Dyck
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.imaginedreal.mgwt.trafficflow.client;

import com.imaginedreal.mgwt.trafficflow.client.activities.about.AboutActivity;
import com.imaginedreal.mgwt.trafficflow.client.activities.about.AboutPlace;
import com.imaginedreal.mgwt.trafficflow.client.activities.camera.CameraActivity;
import com.imaginedreal.mgwt.trafficflow.client.activities.camera.CameraPlace;
import com.imaginedreal.mgwt.trafficflow.client.activities.seattle.SeattleActivity;
import com.imaginedreal.mgwt.trafficflow.client.activities.seattle.SeattlePlace;
import com.imaginedreal.mgwt.trafficflow.client.activities.settings.SettingsActivity;
import com.imaginedreal.mgwt.trafficflow.client.activities.settings.SettingsPlace;
import com.imaginedreal.mgwt.trafficflow.client.activities.tacoma.TacomaActivity;
import com.imaginedreal.mgwt.trafficflow.client.activities.tacoma.TacomaPlace;
import com.google.gwt.activity.shared.Activity;
import com.google.gwt.activity.shared.ActivityMapper;
import com.google.gwt.place.shared.Place;

public class AppMainActivityMapper implements ActivityMapper {

    private final ClientFactory clientFactory;

    private Place lastPlace;

    public AppMainActivityMapper(ClientFactory clientFactory) {
        this.clientFactory = clientFactory;
    }

    @Override
    public Activity getActivity(Place place) {
        Activity activity = getActivity(lastPlace, place);
        lastPlace = place;

        return activity;
    }

    private SeattleActivity homeActivity;

    private SeattleActivity getHomeActivity() {
        if (homeActivity == null) {
            homeActivity = new SeattleActivity(clientFactory);
        }

        return homeActivity;
    }

    private Activity getActivity(Place lastPlace, Place newPlace) {
        if (newPlace instanceof SeattlePlace) {
            return getHomeActivity();
        }

        if (newPlace instanceof TacomaPlace) {
            return new TacomaActivity(clientFactory);
        }

        if (newPlace instanceof AboutPlace) {
            return new AboutActivity(clientFactory);
        }

        if (newPlace instanceof SettingsPlace) {
            return new SettingsActivity(clientFactory);
        }

        if (newPlace instanceof CameraPlace) {
            return new CameraActivity(clientFactory);
        }

        return null;
    }

}