88 lines
3.7 KiB
Java
88 lines
3.7 KiB
Java
/*
|
|
* Copyright (C) 2010 The Android Open Source Project
|
|
*
|
|
* 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 android.util;
|
|
import java.lang.reflect.Field;
|
|
import java.lang.reflect.Modifier;
|
|
import java.util.Arrays;
|
|
public final class Objects {
|
|
private Objects() {}
|
|
/**
|
|
* Returns true if two possibly-null objects are equal.
|
|
*/
|
|
public static boolean equal(Object a, Object b) {
|
|
return a == b || (a != null && a.equals(b));
|
|
}
|
|
public static int hashCode(Object o) {
|
|
return (o == null) ? 0 : o.hashCode();
|
|
}
|
|
/**
|
|
* Returns a string reporting the value of each declared field, via reflection.
|
|
* Static and transient fields are automatically skipped. Produces output like
|
|
* "SimpleClassName[integer=1234,string="hello",character='c',intArray=[1,2,3]]".
|
|
*/
|
|
public static String toString(Object o) {
|
|
Class<?> c = o.getClass();
|
|
StringBuilder sb = new StringBuilder();
|
|
sb.append(c.getSimpleName()).append('[');
|
|
int i = 0;
|
|
for (Field f : c.getDeclaredFields()) {
|
|
if ((f.getModifiers() & (Modifier.STATIC | Modifier.TRANSIENT)) != 0) {
|
|
continue;
|
|
}
|
|
f.setAccessible(true);
|
|
try {
|
|
Object value = f.get(o);
|
|
if (i++ > 0) {
|
|
sb.append(',');
|
|
}
|
|
sb.append(f.getName());
|
|
sb.append('=');
|
|
if (value.getClass().isArray()) {
|
|
if (value.getClass() == boolean[].class) {
|
|
sb.append(Arrays.toString((boolean[]) value));
|
|
} else if (value.getClass() == byte[].class) {
|
|
sb.append(Arrays.toString((byte[]) value));
|
|
} else if (value.getClass() == char[].class) {
|
|
sb.append(Arrays.toString((char[]) value));
|
|
} else if (value.getClass() == double[].class) {
|
|
sb.append(Arrays.toString((double[]) value));
|
|
} else if (value.getClass() == float[].class) {
|
|
sb.append(Arrays.toString((float[]) value));
|
|
} else if (value.getClass() == int[].class) {
|
|
sb.append(Arrays.toString((int[]) value));
|
|
} else if (value.getClass() == long[].class) {
|
|
sb.append(Arrays.toString((long[]) value));
|
|
} else if (value.getClass() == short[].class) {
|
|
sb.append(Arrays.toString((short[]) value));
|
|
} else {
|
|
sb.append(Arrays.toString((Object[]) value));
|
|
}
|
|
} else if (value.getClass() == Character.class) {
|
|
sb.append('\'').append(value).append('\'');
|
|
} else if (value.getClass() == String.class) {
|
|
sb.append('"').append(value).append('"');
|
|
} else {
|
|
sb.append(value);
|
|
}
|
|
} catch (IllegalAccessException unexpected) {
|
|
throw new AssertionError(unexpected);
|
|
}
|
|
}
|
|
sb.append("]");
|
|
return sb.toString();
|
|
}
|
|
}
|