package org.jtester.core.context;
import java.lang.reflect.Field;
import org.jtester.bytecode.imposteriser.JTesterProxy;
import org.jtester.bytecode.reflector.FieldAccessor;
import org.jtester.bytecode.reflector.MethodAccessor;
import org.jtester.bytecode.reflector.helper.ClazzHelper;
import org.jtester.bytecode.reflector.helper.FieldHelper;
import org.jtester.bytecode.reflector.helper.MethodHelper;
import org.jtester.json.JSON;
@SuppressWarnings({ "unchecked", "rawtypes" })
public class JTesterReflector {
/**
* 调用类为clazz,名称为method的方法
*
* @param methodName
* @param paras
* @return
*/
public <T> T invoke(Class clazz, Object target, String method, Object... paras) {
if (target == null) {
throw new RuntimeException("the target object can't be null!");
}
Object _target = ClazzHelper.getProxiedObject(target);
Class[] paraClazes = MethodHelper.getParameterClazz(paras);
MethodAccessor methodAccessor = new MethodAccessor(clazz, method, paraClazes);
Object result = methodAccessor.invokeUnThrow(_target, paras);
return (T) result;
}
public <T> T invoke(Object target, String method, Object... paras) {
if (target == null) {
throw new RuntimeException("the target object can't be null!");
}
if (target instanceof Class) {
return (T) invokeStatic((Class) target, method, paras);
} else {
Object _target = ClazzHelper.getProxiedObject(target);
return (T) invoke(_target.getClass(), _target, method, paras);
}
}
public <T> T invokeStatic(Class target, String method, Object... paras) {
return (T) MethodHelper.invokeStatic(target, method, paras);
}
public void setField(Object target, String field, Object value) {
if (target == null) {
throw new RuntimeException("the target object can't be null!");
}
Object _target = ClazzHelper.getProxiedObject(target);
setField(_target.getClass(), _target, field, value);
}
public void setField(Class clazz, Object target, String field, Object value) {
if (target == null) {
throw new RuntimeException("the target object can't be null!");
}
Object _target = ClazzHelper.getProxiedObject(target);
FieldAccessor accessor = new FieldAccessor(clazz, field);
accessor.set(_target, value);
}
/**
* 返回target对象中名称为field的字段
*
* @param <T>
* 字段类型
* @param target
* 字段所有者
* @param field
* 字段名称
* @return 字段值
*/
public <T> T getField(Object target, String field) {
if (target == null) {
throw new RuntimeException("the target object can't be null!");
}
Object _target = ClazzHelper.getProxiedObject(target);
return (T) getField(_target.getClass(), _target, field);
}
/**
* 返回target对象中名称为field的字段
*
* @param clazz
* 定义字段的类（可能是target对象的父类或target自身)
* @param target
* 字段所有者实例
* @param field
* 字段值
* @return
*/
public <T> T getField(Class clazz, Object target, String field) {
if (target == null) {
throw new RuntimeException("the target object can't be null!");
}
Object _target = ClazzHelper.getProxiedObject(target);
FieldAccessor accessor = new FieldAccessor(clazz, field);
return (T) accessor.get(_target);
}
/**
* get class's static value<br>
* 获得clazz的静态变量值
*
* @param <T>
* @param clazz
* @param field
* @return
*/
public <T> T getStaticField(Class clazz, String field) {
FieldAccessor accessor = new FieldAccessor(clazz, field);
Object o = accessor.getStatic();
return (T) o;
}
/**
* set class's static value<br>
* 设置clazz的静态变量值
*
* @param clazz
* @param field
* @param value
*/
public void setStaticField(Class clazz, String field, Object value) {
FieldAccessor accessor = new FieldAccessor(clazz, field);
accessor.setStatic(value);
}
/**
* 返回spring代理的目标对象
*
* @param <T>
* @param source
* @return
*/
public <T> T getSpringAdvisedTarget(Object source) {
Object target = ClazzHelper.getProxiedObject(source);
return (T) target;
}
/**
* 创建target对象field字段的代理实例<br>
* 用于运行时转移代理操作到字段对象上
*
* @param <T>
* @param target
* @param field
* @return
*/
public <T> T newProxy(Class target, String fieldname) {
if (target == null) {
throw new RuntimeException("can't get a field from null object.");
}
Field field = FieldHelper.getField(target, fieldname);
Object proxy = JTesterProxy.proxy(target, field);
return (T) proxy;
}
/**
* 创建claz对象实例<br>
* 不是通过 new Construction()形式
*
* @param <T>
* @param claz
* @return
*/
public <T> T newInstance(Class<T> claz) {
Object o = ClazzHelper.newInstance(claz);
return (T) o;
}
/**
* 从json字符串创建对象
*
* @param <T>
* @param json
* @return
*/
public <T> T newInstance(String json) {
Object o = JSON.toObject(json);
return (T) o;
}
/**
* 从json字符串创建对象
*
* @param <T>
* @param json
* @param claz
* @return
*/
public <T> T newInstance(String json, Class<T> clazz) {
Object o = JSON.toObject(json, clazz);
return (T) o;
}
}