BatteryContext.java

/*
 * Copyright (C) 2014 The Context Engine Project
 *
 * 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 uk.ac.tvu.mdse.contextengine.contexts;

import uk.ac.tvu.mdse.contextengine.MonitorComponent;
import uk.ac.tvu.mdse.contextengine.reasoning.ContextValues;
import android.content.Context;
import android.os.BatteryManager;
import android.os.Bundle;
import android.util.Log;

public class BatteryContext extends MonitorComponent {

	private static final double HIGH_BAT_VALUE = 80;
	private static final double MEDIUM_BAT_VALUE = 30;
	int v = -1;
	int value = 0;
	private static final long serialVersionUID = -7034400776638700530L;
	public static final String LOG_TAG = "BatteryContext";
	public static final boolean D = true;

	public BatteryContext(Context c) {
		super("BatteryContext", c, "Intent.ACTION_BATTERY_CHANGED",
				"BatteryManager.EXTRA_STATUS");
		if (D)
			Log.d(LOG_TAG, "constructor");
	}

	// public void componentDefined(){
	// if (D) Log.d(LOG_TAG, "componentDefined " + contextName);
	// this.contextInformation = obtainContextInformation();
	// // if (valuesSets.size() == 2){
	// // valuesSets.remove(0);
	// // }
	// if (D) Log.d(LOG_TAG, "componentDefined " + valuesSets.size());
	// if (D) Log.d(LOG_TAG, "componentDefined " +
	// valuesSets.get(0).keys.size());
	// if (D) Log.d(LOG_TAG, "componentDefined " +
	// valuesSets.get(0).contextInformation);
	// }

	protected String obtainContextInformation() {
		if (D)
			Log.d(LOG_TAG, "obtainContextInformation");
		/*
		 * BatteryManager bm = new BatteryManager();
		 * 
		 * int rawlevel = Integer.parseInt(BatteryManager.EXTRA_LEVEL); int
		 * scale = Integer.parseInt(BatteryManager.EXTRA_SCALE);
		 * 
		 * if (rawlevel >= 0 && scale > 0) v = (rawlevel * 100) / scale;
		 */

		// set as default
		int v = 50;

		return this.valuesSets.get(1).contextInformation;
	}

	protected void checkContext(Bundle data) {
		if (D)
			Log.d(LOG_TAG, "checkContext");
		int rawlevel = data.getInt(BatteryManager.EXTRA_LEVEL, -1);
		int scale = data.getInt(BatteryManager.EXTRA_SCALE, -1);

		if (rawlevel >= 0 && scale > 0) {
			v = (rawlevel * 100) / scale;

			// go through all context sets and send notification
			// only for sets in which info changed
			for (ContextValues cv : this.valuesSets) {
				if (cv.setNewContextValue(v))
					sendNotification(cv);
			}
		}
	}
}