1 /* 2 * Copyright 2018 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.bluetooth.hfp; 17 18 import android.os.Message; 19 20 /** 21 * An object passed through {@link Message#obj} on state machines 22 */ 23 public abstract class HeadsetMessageObject { 24 /** 25 * Build a representation of this object in a {@link StringBuilder} 26 * 27 * @param builder {@link StringBuilder} provided to build the string 28 */ 29 public abstract void buildString(StringBuilder builder); 30 31 @Override 32 public String toString() { 33 StringBuilder builder = new StringBuilder(); 34 buildString(builder); 35 return builder.toString(); 36 } 37 } 38
