Added "ReflectUtils" for replace apache lang3

replugin-host-library/replugin-host-lib/src/main/java/com/qihoo360/replugin/utils/ReflectUtils.java

@@ -0,0 +1,278 @@
+/*
+ * Copyright (C) 2005-2017 Qihoo 360 Inc.
+ *
+ * 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 com.qihoo360.replugin.utils;
+
+import android.content.Context;
+
+import com.qihoo360.replugin.helper.LogRelease;
+
+import java.io.FileDescriptor;
+import java.io.PrintWriter;
+import java.lang.reflect.AccessibleObject;
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Field;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+import java.util.ArrayList;
+import java.util.List;
+
+import static com.qihoo360.replugin.helper.LogDebug.MISC_TAG;
+import static com.qihoo360.replugin.helper.LogRelease.LOGR;
+
+/**
+ * 和反射操作有关的Utils
+ *
+ * @author RePlugin Team
+ */
+public final class ReflectUtils {
+
+    // ----------------
+    // Class & Constructor
+    // ----------------
+
+    public static Class<?> getClass(final String className) throws ClassNotFoundException {
+        return Class.forName(className);
+    }
+
+    public static <T> T invokeConstructor(Class<T> cls, Class[] parameterTypes, Object... args) throws
+            NoSuchMethodException, IllegalAccessException, InvocationTargetException, InstantiationException {
+        Constructor<T> c = cls.getConstructor(parameterTypes);
+        if (c != null) {
+            c.setAccessible(true);
+            return c.newInstance(args);
+        }
+        return null;
+    }
+
+    // ----------------
+    // Field
+    // ----------------
+
+    public static Field getField(Class<?> cls, String fieldName) {
+        // From Apache: FieldUtils.getField()
+
+        // check up the superclass hierarchy
+        for (Class<?> acls = cls; acls != null; acls = acls.getSuperclass()) {
+            try {
+                final Field field = acls.getDeclaredField(fieldName);
+                // getDeclaredField checks for non-public scopes as well
+                // and it returns accurate results
+                setAccessible(field, true);
+
+                return field;
+            } catch (final NoSuchFieldException ex) { // NOPMD
+                // ignore
+            }
+        }
+        // check the public interface case. This must be manually searched for
+        // incase there is a public supersuperclass field hidden by a private/package
+        // superclass field.
+        Field match = null;
+        for (final Class<?> class1 : cls.getInterfaces()) {
+            try {
+                final Field test = class1.getField(fieldName);
+                Validate.isTrue(match == null, "Reference to field %s is ambiguous relative to %s"
+                        + "; a matching field exists on two or more implemented interfaces.", fieldName, cls);
+                match = test;
+            } catch (final NoSuchFieldException ex) { // NOPMD
+                // ignore
+            }
+        }
+        return match;
+    }
+
+    public static Object readStaticField(Class<?> c, String fieldName) throws NoSuchFieldException, IllegalAccessException {
+        return readField(c, null, fieldName);
+    }
+
+    public static Object readField(Object target, String fieldName) throws IllegalAccessException, NoSuchFieldException {
+        return readField(target.getClass(), target, fieldName);
+    }
+
+    public static Object readField(Class<?> c, Object target, String fieldName) throws IllegalAccessException, NoSuchFieldException {
+        Field f = getField(c, fieldName);
+
+        return readField(f, target);
+    }
+
+    public static Object readField(final Field field, final Object target) throws IllegalAccessException {
+        return field.get(target);
+    }
+
+    public static void writeField(Object target, String fName, Object value) throws NoSuchFieldException, IllegalAccessException {
+        writeField(target.getClass(), target, fName, value);
+    }
+
+    public static void writeField(Class<?> c, Object object, String fName, Object value) throws NoSuchFieldException, IllegalAccessException {
+        Field f = getField(c, fName);
+        writeField(f, object, value);
+    }
+
+    public static void writeField(final Field field, final Object target, final Object value) throws IllegalAccessException {
+        field.set(target, value);
+    }
+
+    public static List<Field> getAllFieldsList(final Class<?> cls) {
+        // From Apache: FieldUtils.getAllFieldsList()
+
+        Validate.isTrue(cls != null, "The class must not be null");
+        final List<Field> allFields = new ArrayList<>();
+        Class<?> currentClass = cls;
+        while (currentClass != null) {
+            final Field[] declaredFields = currentClass.getDeclaredFields();
+            for (final Field field : declaredFields) {
+                allFields.add(field);
+            }
+            currentClass = currentClass.getSuperclass();
+        }
+        return allFields;
+    }
+
+    public static void removeFieldFinalModifier(final Field field) {
+        // From Apache: FieldUtils.removeFinalModifier()
+        Validate.isTrue(field != null, "The field must not be null");
+
+        try {
+            if (Modifier.isFinal(field.getModifiers())) {
+                // Do all JREs implement Field with a private ivar called "modifiers"?
+                final Field modifiersField = Field.class.getDeclaredField("modifiers");
+                final boolean doForceAccess = !modifiersField.isAccessible();
+                if (doForceAccess) {
+                    modifiersField.setAccessible(true);
+                }
+                try {
+                    modifiersField.setInt(field, field.getModifiers() & ~Modifier.FINAL);
+                } finally {
+                    if (doForceAccess) {
+                        modifiersField.setAccessible(false);
+                    }
+                }
+            }
+        } catch (final NoSuchFieldException ignored) {
+            // The field class contains always a modifiers field
+        } catch (final IllegalAccessException ignored) {
+            // The modifiers field is made accessible
+        }
+    }
+
+    // ----------------
+    // Method
+    // ----------------
+
+    public static Method getMethod(Class<?> cls, String fieldName, Class<?>... parameterTypes) {
+        // check up the superclass hierarchy
+        for (Class<?> acls = cls; acls != null; acls = acls.getSuperclass()) {
+            try {
+                final Method field = acls.getDeclaredMethod(fieldName, parameterTypes);
+                // getDeclaredField checks for non-public scopes as well
+                // and it returns accurate results
+                setAccessible(field, true);
+
+                return field;
+            } catch (final NoSuchMethodException ex) { // NOPMD
+                // ignore
+            }
+        }
+        // check the public interface case. This must be manually searched for
+        // incase there is a public supersuperclass field hidden by a private/package
+        // superclass field.
+        Method match = null;
+        for (final Class<?> class1 : cls.getInterfaces()) {
+            try {
+                final Method test = class1.getMethod(fieldName, parameterTypes);
+                Validate.isTrue(match == null, "Reference to field %s is ambiguous relative to %s"
+                        + "; a matching field exists on two or more implemented interfaces.", fieldName, cls);
+                match = test;
+            } catch (final NoSuchMethodException ex) { // NOPMD
+                // ignore
+            }
+        }
+        return match;
+    }
+
+
+    public static Object invokeMethod(final Object object, final String methodName, Class<?>[] methodParamTypes, Object... args)
+            throws NoSuchMethodException, IllegalAccessException, InvocationTargetException {
+        Class clz = object.getClass();
+        Method m = getMethod(clz, methodName, methodParamTypes);
+        return m.invoke(args);
+    }
+
+    public static Object invokeMethod(ClassLoader loader, String clzName,
+                                      String methodName, Object methodReceiver,
+                                      Class<?>[] methodParamTypes, Object... methodParamValues) throws
+            ClassNotFoundException, NoSuchMethodException, InvocationTargetException, IllegalAccessException {
+        if (methodReceiver == null) {
+            return null;
+        }
+
+        Class clz = Class.forName(clzName, false, loader);
+        if (clz != null) {
+            Method med = clz.getMethod(methodName, methodParamTypes);
+            if (med != null) {
+                med.setAccessible(true);
+                return med.invoke(methodReceiver, methodParamValues);
+            }
+        }
+        return null;
+    }
+
+    public static void setAccessible(AccessibleObject ao, boolean value) {
+        if (ao.isAccessible() != value) {
+            ao.setAccessible(value);
+        }
+    }
+
+    // ----------------
+    // Other
+    // ----------------
+
+    public static final void dumpObject(Object object, FileDescriptor fd, PrintWriter writer, String[] args) {
+        try {
+            Class<?> c = object.getClass();
+            do {
+                writer.println("c=" + c.getName());
+                Field fields[] = c.getDeclaredFields();
+                for (Field f : fields) {
+                    boolean acc = f.isAccessible();
+                    if (!acc) {
+                        f.setAccessible(true);
+                    }
+                    Object o = f.get(object);
+                    writer.print(f.getName());
+                    writer.print("=");
+                    if (o != null) {
+                        writer.println(o.toString());
+                    } else {
+                        writer.println("null");
+                    }
+                    if (!acc) {
+                        f.setAccessible(acc);
+                    }
+                }
+                c = c.getSuperclass();
+            } while (c != null && !c.equals(Object.class) && !c.equals(Context.class));
+        } catch (Throwable e) {
+            if (LOGR) {
+                LogRelease.e(MISC_TAG, e.getMessage(), e);
+            }
+        }
+    }
+
+
+}