icasue.reflect.utils.ProxyDigestUtil Maven / Gradle / Ivy
package icasue.reflect.utils;
import icasue.reflect.handles.fields.FieldOF;
import icasue.reflect.handles.object.ObjectOF;
import icasue.reflect.handles.predicate.SureOF;
import java.util.Optional;
/**
* @Author: Qiao Hang
* @CreateDate: 2021/1/7 下午2:02
* @UpdateDate:
* @Description:
*/
public class ProxyDigestUtil {
/**
* This method's function ins to handle methods as below:
* #exposeSpringEnhancerInst
* #exposeProxyStrongerEnhancerInst
* @param cglibProxy
* @param
* @return
* @throws Throwable
*/
public static Optional exposeOrigInstanceUnderCglib(T cglibProxy) throws Throwable{
if(ObjectOF.isNull_.test(cglibProxy)) return Optional.ofNullable(null);
String clsFullName = cglibProxy.getClass().getName();
if(ObjectOF.equals_.test(Boolean.TRUE,clsFullName.contains("$$Enhancer")))
if(ObjectOF.equals_.test(Boolean.TRUE,clsFullName.contains("$$EnhancerBySpringCGLIB")))
return exposeSpringEnhancerInst(cglibProxy);
else if(ObjectOF.equals_.test(Boolean.TRUE,clsFullName.contains("$$EnhancerByCGLIB")))
try { return exposeProxyStrongerEnhancerInst(cglibProxy); }catch (Throwable e){
/*Here if throwing exception, means others third framework using CGLIB, we can't predicate inner store. return original inst.*/
}
else
return Optional.ofNullable(cglibProxy);
return Optional.ofNullable(cglibProxy);
}
/**
* This method is to find suitable instance, which having the field your careful.
* notice: Be careful to using this method, except for developer know cls metadata clearly.
* @param cglibProxy
* @param careFiled
* @param
* @return
* @throws Throwable
*/
private static Optional exposeInstUnderCglibDeeply(T cglibProxy,String careFiled) throws Throwable{
if(ObjectOF.isNull_.test(cglibProxy)) return Optional.ofNullable(null);
try {
for (T ref = cglibProxy; ref != null; ref = exposeOrigInstanceUnderCglib(ref).orElse(null))
try {
Object careValue = FieldOF.get_.apply(FieldOF.findField_ofTp_fName_.apply(ref.getClass(), careFiled), ref);
if (ObjectOF.notNull_.test(careValue)) return Optional.ofNullable(ref); else continue;
}catch (Throwable e){ /*Here occur exception is normally, course of proxy inst mayBe do't have this field.*/}
}catch (Throwable e){ /*Occur exception on Digest proxy's process may be proxy native to third dependency. */ }
return Optional.ofNullable(cglibProxy);
}
/**
* This api attend to expose original inst under SpringCGLIB's enhancer.
* @param cglibProxy
* @param
* @return
* @throws Throwable
*/
private static Optional exposeSpringEnhancerInst(T cglibProxy) throws Throwable{
T realInst = (T)ObjectOF.getNull_.get();
Class enhancerCglibCls = Class.forName(cglibProxy.getClass().getName());
FieldOF.findField_ofTp_fName_.apply(enhancerCglibCls, "CGLIB$CALLBACK_1");
Object cglib$CALLBACK_1_OUTER = FieldOF.get_.apply(FieldOF.findField_ofTp_fName_.apply(enhancerCglibCls, "CGLIB$CALLBACK_1"), cglibProxy);
SureOF.notNull(cglib$CALLBACK_1_OUTER,"ProxyDigestUtil :: exposeSpringEnhancerInst :: cglib$CALLBACK_1_OUTER enhancer NULL Object.");
Class cglib$INTER = Class.forName(cglib$CALLBACK_1_OUTER.getClass().getName());
realInst = (T) FieldOF.get_.apply(FieldOF.findField_ofTp_fName_.apply(cglib$INTER, "target"), cglib$CALLBACK_1_OUTER);
return Optional.ofNullable(realInst);
}
/**
* This api attend to expose original inst under CGLIB's enhancer.
* notice, this method only deal with using LBS-PLUGIN-STRONGER-ADVICE's app,
* or other components be registered by third dependency and is similar to StrongerAdvice on details, but actual poorly.
* @param cglibProxy
* @param
* @return
* @throws Throwable
*/
private static Optional exposeProxyStrongerEnhancerInst(T cglibProxy) throws Throwable{
T realInst = (T)ObjectOF.getNull_.get();
Class enhancerCglibCls = Class.forName(cglibProxy.getClass().getName());
Object cglib$CALLBACK_0_OUTER = FieldOF.get_.apply(FieldOF.findField_ofTp_fName_.apply(enhancerCglibCls, "CGLIB$CALLBACK_0"), cglibProxy);
SureOF.notNull(cglib$CALLBACK_0_OUTER,"ProxyDigestUtil :: exposeProxyStrongerEnhancerInst :: cglib$CALLBACK_0_OUTER enhancer NULL Object.");
Class cglib$INTER = Class.forName(cglib$CALLBACK_0_OUTER.getClass().getName());
Object cglib$INTER_AS_ProxyStronger = FieldOF.get_.apply(FieldOF.findField_ofTp_fName_.apply(cglib$INTER, "this$0"), cglib$CALLBACK_0_OUTER);
SureOF.notNull(cglib$INTER_AS_ProxyStronger,"ProxyDigestUtil :: exposeProxyStrongerEnhancerInst :: cglib$INTER_AS_ProxyStronger enhancer NULL Object.");
Class proxyStrongerCls = Class.forName(cglib$INTER_AS_ProxyStronger.getClass().getName());
realInst = (T)FieldOF.get_.apply(FieldOF.findField_ofTp_fName_.apply(proxyStrongerCls, "realInvokeObject"), cglib$INTER_AS_ProxyStronger);
return Optional.ofNullable(realInst);
}
}