1 /* 2 * Copyright (C) 2014 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 17 package android.util; 18 19 import java.io.IOException; 20 21 /** 22 * Utility methods for proxying richer exceptions across Binder calls. 23 * 24 * @hide 25 */ 26 public class ExceptionUtils { 27 // TODO: longer term these should be replaced with first-class 28 // Parcel.read/writeException() and AIDL support, but for now do this using 29 // a nasty hack. 30 31 private static final String PREFIX_IO = "\u2603"; 32 33 public static RuntimeException wrap(IOException e) { 34 throw new IllegalStateException(PREFIX_IO + e.getMessage()); 35 } 36 37 public static void maybeUnwrapIOException(RuntimeException e) throws IOException { 38 if ((e instanceof IllegalStateException) && e.getMessage().startsWith(PREFIX_IO)) { 39 throw new IOException(e.getMessage().substring(PREFIX_IO.length())); 40 } 41 } 42 43 public static String getCompleteMessage(String msg, Throwable t) { 44 final StringBuilder builder = new StringBuilder(); 45 if (msg != null) { 46 builder.append(msg).append(": "); 47 } 48 builder.append(t.getMessage()); 49 while ((t = t.getCause()) != null) { 50 builder.append(": ").append(t.getMessage()); 51 } 52 return builder.toString(); 53 } 54 55 public static String getCompleteMessage(Throwable t) { 56 return getCompleteMessage(null, t); 57 } 58 } 59
