1 files changed, 64 insertions, 0 deletions
diff --git a/luni/src/main/java/libcore/util/Objects.java b/luni/src/main/java/libcore/util/Objects.java
index 7817316..573b973 100644
--- a/luni/src/main/java/libcore/util/Objects.java
+++ b/luni/src/main/java/libcore/util/Objects.java
@@ -16,6 +16,10 @@
 
 package libcore.util;
 
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
+import java.util.Arrays;
+
 public final class Objects {
     private Objects() {}
 
@@ -29,4 +33,64 @@ public final class Objects {
     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();
+    }
 }