com.telly.groundy.GroundyTaskFactory Maven / Gradle / Ivy

Go to download
/*
 * Copyright 2013 Telly Inc.
 *
 * 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.telly.groundy;

import android.content.Context;

import java.lang.reflect.Constructor;
import java.util.HashMap;
import java.util.Map;

/**
 * {@link GroundyTask} factory
 *
 * @author Evelio Tarazona 
 * @version 1.0
 */
class GroundyTaskFactory {
  private static final String TAG = "GroundyTaskFactory";

  private static final Map, GroundyTask> sCache = new HashMap, GroundyTask>();

  /**
   * Non instances
   */
  private GroundyTaskFactory() {
  }

  /**
   * Builds a GroundyTask based on call
   *
   * @param taskClass groundy task implementation class
   * @param context   used to instantiate the task
   * @return An instance of a GroundyTask if a given call is valid null otherwise
   */
  static GroundyTask get(Class taskClass, Context context) {
    if (sCache.containsKey(taskClass)) {
      return sCache.get(taskClass);
    }
    GroundyTask groundyTask = null;
    try {
      L.d(TAG, "Instantiating " + taskClass);
      Constructor ctc = taskClass.getConstructor();
      groundyTask = (GroundyTask) ctc.newInstance();
      if (groundyTask.canBeCached()) {
        sCache.put(taskClass, groundyTask);
      } else if (sCache.containsKey(taskClass)) {
        sCache.remove(taskClass);
      }
      groundyTask.setContext(context);
      return groundyTask;
    } catch (Exception e) {
      L.e(TAG, "Unable to create task for call " + taskClass, e);
    }
    return groundyTask;
  }

}