1 /* 2 * Copyright (C) 2010 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 libcore.util; 18 19 import java.lang.reflect.Field; 20 import java.lang.reflect.Modifier; 21 import java.util.Arrays; 22 23 public final class Objects { 24 private Objects() {} 25 26 /** 27 * Returns a string reporting the value of each declared field, via reflection. 28 * Static and transient fields are automatically skipped. Produces output like 29 * "SimpleClassName[integer=1234,string="hello",character='c',intArray=[1,2,3]]". 30 */ 31 public static String toString(Object o) { 32 Class<?> c = o.getClass(); 33 StringBuilder sb = new StringBuilder(); 34 sb.append(c.getSimpleName()).append('['); 35 int i = 0; 36 for (Field f : c.getDeclaredFields()) { 37 if ((f.getModifiers() & (Modifier.STATIC | Modifier.TRANSIENT)) != 0) { 38 continue; 39 } 40 f.setAccessible(true); 41 try { 42 Object value = f.get(o); 43 44 if (i++ > 0) { 45 sb.append(','); 46 } 47 48 sb.append(f.getName()); 49 sb.append('='); 50 51 if (value.getClass().isArray()) { 52 if (value.getClass() == boolean[].class) { 53 sb.append(Arrays.toString((boolean[]) value)); 54 } else if (value.getClass() == byte[].class) { 55 sb.append(Arrays.toString((byte[]) value)); 56 } else if (value.getClass() == char[].class) { 57 sb.append(Arrays.toString((char[]) value)); 58 } else if (value.getClass() == double[].class) { 59 sb.append(Arrays.toString((double[]) value)); 60 } else if (value.getClass() == float[].class) { 61 sb.append(Arrays.toString((float[]) value)); 62 } else if (value.getClass() == int[].class) { 63 sb.append(Arrays.toString((int[]) value)); 64 } else if (value.getClass() == long[].class) { 65 sb.append(Arrays.toString((long[]) value)); 66 } else if (value.getClass() == short[].class) { 67 sb.append(Arrays.toString((short[]) value)); 68 } else { 69 sb.append(Arrays.toString((Object[]) value)); 70 } 71 } else if (value.getClass() == Character.class) { 72 sb.append('\'').append(value).append('\''); 73 } else if (value.getClass() == String.class) { 74 sb.append('"').append(value).append('"'); 75 } else { 76 sb.append(value); 77 } 78 } catch (IllegalAccessException unexpected) { 79 throw new AssertionError(unexpected); 80 } 81 } 82 sb.append("]"); 83 return sb.toString(); 84 } 85 } 86
