cn.jiangzeyin.util.ReflectCache Maven / Gradle / Ivy
package cn.jiangzeyin.util;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.concurrent.ConcurrentHashMap;
/**
* 反射缓存工具类
*
* @author jiangzeyin
*/
public final class ReflectCache {
private final static ConcurrentHashMap fieldMap = new ConcurrentHashMap<>();
private final static ConcurrentHashMap fieldsMap = new ConcurrentHashMap<>();
private final static ConcurrentHashMap methodMap = new ConcurrentHashMap<>();
private final static ConcurrentHashMap methodsMap = new ConcurrentHashMap<>();
/**
* 获取class 所有字段
*
* @param cls cls
* @return field
* @author jiangzeyin
*/
public static Field[] getDeclaredFields(Class cls) {
Field[] fields = fieldsMap.get(cls.getName());
if (fields == null) {
fields = cls.getDeclaredFields();
fieldsMap.put(cls.getName(), fields);
}
return fields;
}
/**
* 获取class 字段
*
* @param cls cls
* @param name name
* @return field
* @throws NoSuchFieldException y
* @throws SecurityException y
* @author jiangzeyin
*/
public static Field getDeclaredField(Class cls, String name) throws NoSuchFieldException, SecurityException {
Field field = fieldMap.get(cls.getName() + "." + name);
if (field == null) {
field = cls.getDeclaredField(name);
field.setAccessible(true);
fieldMap.put(cls.getName() + "." + name, field);
}
return field;
}
/**
* 获取class 方法
*
* @param cls cls
* @param name name
* @param parameterTypes types
* @return method
* @throws NoSuchMethodException y
* @throws SecurityException y
* @author jiangzeyin
*/
public static Method getDeclaredMethod(Class cls, String name, Class... parameterTypes) throws NoSuchMethodException, SecurityException {
String mapname = cls.getName() + "." + name + "." + ParameterTypestoString(parameterTypes);
Method method = methodMap.get(name);
if (method == null) {
method = cls.getDeclaredMethod(name, parameterTypes);
method.setAccessible(true);
methodMap.put(mapname, method);
}
return method;
}
/**
* 获取方法
*
* @param cls cls
* @return method[]
* @throws NoSuchMethodException y
* @throws SecurityException y
* @author jiangzeyin
*/
public static Method[] getDeclaredMethods(Class cls) throws NoSuchMethodException, SecurityException {
Method[] method = methodsMap.get(cls.getName());
if (method == null) {
method = cls.getDeclaredMethods();
methodsMap.put(cls.getName(), method);
}
return method;
}
/**
* 将参数转字符串名称
*
* @param parameterTypes types
* @return string
* @author jiangzeyin
*/
private static String ParameterTypestoString(Class... parameterTypes) {
if (parameterTypes == null)
return "";
String name = "";
for (Class class1 : parameterTypes) {
name = class1.getName() + ",";
}
return name;
}
}