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      1 /*
      2  * Copyright (c) 2016, The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *     http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 package com.android.car.stream;
     17 
     18 /**
     19  * A base class for extensions to {@link StreamCard}.
     20  *
     21  * <p>
     22  * {@link StreamCard} allows for additional fields to be included in the template through the
     23  * use of extensions. Extensions should hold data specific for the type of {@link StreamCard}
     24  * it is extending.
     25  *
     26  * Example:
     27  *
     28  * public class CurrentCallExtension extends StreamCardExtension {
     29  *         private long mCallStartTime;
     30  *         private String mDisplayName;
     31  *
     32  *         public static final Creator<CurrentCallExtension> CREATOR
     33  *                  = new BundleableCreator<>(CurrentCallExtension.class);
     34  *
     35  *         @Override
     36  *         protected void writeToBundle(Bundle bundle) {...}
     37  *
     38  *         @Override
     39  *         protected void readFromBundle(Bundle bundle) {...}
     40  *
     41  * }
     42  * </p>
     43  *
     44  *
     45  */
     46 public abstract class StreamCardExtension extends AbstractBundleable {
     47 }
     48