Index: web_apks/minting_example/src/org/chromium/minting/Reflect.java |
diff --git a/web_apks/minting_example/src/org/chromium/minting/Reflect.java b/web_apks/minting_example/src/org/chromium/minting/Reflect.java |
new file mode 100644 |
index 0000000000000000000000000000000000000000..2e89c2a9cc56e2dc2750acf41d6f61df538ec82b |
--- /dev/null |
+++ b/web_apks/minting_example/src/org/chromium/minting/Reflect.java |
@@ -0,0 +1,66 @@ |
+// Copyright 2016 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+package org.chromium.minting; |
+ |
+import java.lang.reflect.Array; |
+import java.lang.reflect.Field; |
+ |
+/** |
+* Reflection helper methods. |
+*/ |
+final class Reflect { |
+ /** |
+ * Sets the value of an object's field (even if it's not visible). |
+ * |
+ * @param instance The object containing the field to set. |
+ * @param name The name of the field to set. |
+ * @param value The new value for the field. |
+ */ |
+ static void setField(Object instance, String name, Object value) |
+ throws ReflectiveOperationException { |
+ Field field = findField(instance, name); |
+ field.setAccessible(true); |
+ field.set(instance, value); |
+ } |
+ |
+ /** |
+ * Retrieves the value of an object's field (even if it's not visible). |
+ * |
+ * @param instance The object containing the field to set. |
+ * @param name The name of the field to set. |
+ * @return The field's value. Primitive values are returned as their boxed |
+ * type. |
+ */ |
+ static Object getField(Object instance, String name) throws ReflectiveOperationException { |
+ Field field = findField(instance, name); |
+ field.setAccessible(true); |
+ return field.get(instance); |
+ } |
+ |
+ /** |
+ * Concatenates two arrays into a new array. The arrays must be of the same |
+ * type. |
+ */ |
+ static Object[] concatArrays(Object[] left, Object[] right) { |
+ Object[] result = (Object[]) Array.newInstance( |
+ left.getClass().getComponentType(), left.length + right.length); |
+ System.arraycopy(left, 0, result, 0, left.length); |
+ System.arraycopy(right, 0, result, left.length, right.length); |
+ return result; |
+ } |
+ |
+ private static Field findField(Object instance, String name) throws NoSuchFieldException { |
+ boolean isStatic = instance instanceof Class; |
+ Class<?> clazz = isStatic ? (Class<?>) instance : instance.getClass(); |
+ for (; clazz != null; clazz = clazz.getSuperclass()) { |
+ try { |
+ return clazz.getDeclaredField(name); |
+ } catch (NoSuchFieldException e) { |
+ // Need to look in the super class. |
+ } |
+ } |
+ throw new NoSuchFieldException("Field " + name + " not found in " + instance.getClass()); |
+ } |
+} |