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Redis Java client with features of In-Memory Data Grid
/**
* Copyright (c) 2013-2019 Nikita Koksharov
*
* 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.
*/
/**
* Copyright (c) 2006, Paul Speed
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1) Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2) Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3) Neither the names "Progeeks", "Meta-JB", nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package org.redisson.liveobject.misc;
import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import org.redisson.api.RObject;
import org.redisson.cache.LRUCacheMap;
/**
*
* @author Rui Gu (https://github.com/jackygurui) Modified
*/
public class ClassUtils {
public static void setField(Object obj, String fieldName, Object value) {
try {
Field field = getDeclaredField(obj.getClass(), fieldName);
if (!field.isAccessible()) {
field.setAccessible(true);
}
field.set(obj, value);
} catch (Exception e) {
throw new IllegalArgumentException(e);
}
}
public static T getAnnotation(Class clazz, String fieldName, Class annotationClass) {
try {
Field field = getDeclaredField(clazz, fieldName);
if (!field.isAccessible()) {
field.setAccessible(true);
}
return field.getAnnotation(annotationClass);
} catch (NoSuchFieldException e) {
return null;
}
}
public static T getAnnotation(Class clazz, Class annotationClass) {
for (Class c : getClassHierarchy(clazz)) {
if (c.getAnnotation(annotationClass) != null) {
return c.getAnnotation(annotationClass);
}
}
return null;
}
public static T getField(Object obj, String fieldName) {
try {
Field field = getDeclaredField(obj.getClass(), fieldName);
if (!field.isAccessible()) {
field.setAccessible(true);
}
return (T) field.get(obj);
} catch (Exception e) {
throw new IllegalArgumentException(e);
}
}
public static Field getDeclaredField(Class clazz, String fieldName) throws NoSuchFieldException {
for (Class c : getClassHierarchy(clazz)) {
for (Field field : c.getDeclaredFields()) {
if (field.getName().equals(fieldName)) {
return field;
}
}
}
throw new NoSuchFieldException("No such field: " + fieldName);
}
private static final Map, Boolean> ANNOTATED_CLASSES = new LRUCacheMap, Boolean>(500, 0, 0);
public static boolean isAnnotationPresent(Class clazz, Class annotation) {
if (clazz.getName().startsWith("java.")) {
return false;
}
Boolean isAnnotated = ANNOTATED_CLASSES.get(clazz);
if (isAnnotated == null) {
for (Class c : getClassHierarchy(clazz)) {
if (c.isAnnotationPresent(annotation)) {
ANNOTATED_CLASSES.put(clazz, true);
return true;
}
}
ANNOTATED_CLASSES.put(clazz, false);
return false;
}
return isAnnotated;
}
private static Iterable> getClassHierarchy(Class clazz) {
// Don't descend into hierarchy for RObjects
if (Arrays.asList(clazz.getInterfaces()).contains(RObject.class)) {
return Collections.>singleton(clazz);
}
List> classes = new ArrayList>();
for (Class c = clazz; c != null; c = c.getSuperclass()) {
classes.add(c);
}
return classes;
}
/**
* Searches through all methods looking for one with the specified name that
* will take the specified paramaters even if the parameter types are more
* generic in the actual method implementation. This is similar to the
* findConstructor() method and has the similar limitations that it doesn't
* do a real widening scope search and simply processes the methods in
* order.
*
* @param type param
* @param name of class
* @param parms classes
*
* @return Method object
*/
public static Method searchForMethod(Class type, String name, Class[] parms) {
try {
return type.getMethod(name, parms);
} catch (NoSuchMethodException e) {}
Method[] methods = type.getMethods();
for (int i = 0; i < methods.length; i++) {
// Has to be named the same of course.
if (!methods[i].getName().equals(name)) {
continue;
}
Class[] types = methods[i].getParameterTypes();
// Does it have the same number of arguments that we're looking for.
if (types.length != parms.length) {
continue;
}
// Check for type compatibility
if (areTypesCompatible(types, parms)) {
return methods[i];
}
}
return null;
}
private static boolean areTypesCompatible(Class[] targets, Class[] sources) {
if (targets.length != sources.length) {
return false;
}
for (int i = 0; i < targets.length; i++) {
if (sources[i] == null) {
continue;
}
if (!translateFromPrimitive(targets[i]).isAssignableFrom(sources[i])) {
return false;
}
}
return true;
}
/**
* If this specified class represents a primitive type (int, float, etc.)
* then it is translated into its wrapper type (Integer, Float, etc.). If
* the passed class is not a primitive then it is just returned.
*
* @param primitive class
* @return class
*/
private static Class translateFromPrimitive(Class primitive) {
if (!primitive.isPrimitive()) {
return primitive;
}
if (Boolean.TYPE.equals(primitive)) {
return Boolean.class;
}
if (Character.TYPE.equals(primitive)) {
return Character.class;
}
if (Byte.TYPE.equals(primitive)) {
return Byte.class;
}
if (Short.TYPE.equals(primitive)) {
return Short.class;
}
if (Integer.TYPE.equals(primitive)) {
return Integer.class;
}
if (Long.TYPE.equals(primitive)) {
return Long.class;
}
if (Float.TYPE.equals(primitive)) {
return Float.class;
}
if (Double.TYPE.equals(primitive)) {
return Double.class;
}
throw new RuntimeException("Error translating type:" + primitive);
}
}
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