LeetCode352 將資料流變為多個不相交區間
阿新 • • 發佈：2021-10-09
CGLIB
CGLIB(Code Generator Library)是個程式碼生成庫，底層使用ASM來操作位元組碼生成新的類。
JDK動態代理通過java原生的反射API進行操作，在生成類上比較高效，
CGLIB通過ASM直接對位元組碼進行操作，在類的執行過程上比較高效。
使用介紹
Enhancer
Enhancer既能夠代理普通類，也可以代理介面。
Enhancer生成被代理類的子類，並所有的方法呼叫（包括從Object繼承的hashCode、equals和toString）
Enhancer不能攔截final類、final方法
// 用來設定父型別 Enhancer.setSuperclass(Class superclass); // 攔截並增強 Enhancer.setCallback(Callback callback); Enhancer.setCallback(new InvocationHandler(){}); Enhancer.setCallback(new MethodInterceptor(){}); // 用來建立代理物件，其提供了很多不同引數的方法用來匹配被增強類的不同構造方法。 Enhancer.create(Class type, Callback callback); Enhancer.create(Class superclass, Class[] interfaces, Callback callback); Enhancer.create(Class[] argumentTypes, Object[] arguments);
Callback
/**
* All callback interfaces used by {@link Enhancer} extend this interface.
* @see MethodInterceptor
* @see NoOp
* @see LazyLoader
* @see Dispatcher
* @see InvocationHandler
* @see FixedValue
*/
public interface Callback{
}
Callback是一個空介面，有6種介面繼承Callback
1、MethodInterceptor:
代理類的所有方法呼叫都會轉而執行這個介面中的intercept方法而不是原方法。
2、NoOp:
將方法呼叫委託給被代理類的原方法，沒其他操作
3、LazyLoader:
在第一次被代理類的方法呼叫時觸發，它返回一個代理類的物件，這個物件會被儲存起來然後負責所有被代理類方法的呼叫，一種lazy模式。
4、Dispatcher:
在每次發生對原方法的呼叫時都會被呼叫並返回一個代理物件來呼叫原方法。
5、InvocationHandler:
跟java.lang.reflect.InvocationHandler用法一樣
6、FixedValue:
攔截所有方法並返回相同的值
原理分析
public class Cat { public void call(){ System.out.println("喵喵"); } public void hobby(){ System.out.println("吃魚"); } } public class CglibProxy { public static Object getProxy(Class<?> cl){ //生成class檔案 //System.setProperty(DebuggingClassWriter.DEBUG_LOCATION_PROPERTY, "D:\\xxx"); Enhancer enhancer = new Enhancer(); enhancer.setClassLoader(cl.getClassLoader()); enhancer.setSuperclass(cl); enhancer.setCallbacks(new Callback[]{new TargetInterceptor0(), new TargetInterceptor1()}); enhancer.setCallbackFilter(new TargetCallbackFilter()); return enhancer.create(); } } public class TargetInterceptor0 implements MethodInterceptor { @Override public Object intercept(Object o, Method method, Object[] args, MethodProxy methodProxy) throws Throwable { System.out.println("cglib before 0 ....."); Object result = methodProxy.invokeSuper(o, args); System.out.println("cglib after 0 ....."); return result; } } public class TargetInterceptor1 implements MethodInterceptor { @Override public Object intercept(Object o, Method method, Object[] args, MethodProxy methodProxy) throws Throwable { System.out.println("cglib before 1 ....."); Object result = methodProxy.invokeSuper(o, args); System.out.println("cglib after 1 ......."); return result; } } /* * 對不同方法設定不同的回撥邏輯，CallbackFilter中return值為回撥陣列Callback[]的下標 **/ public class TargetCallbackFilter implements CallbackFilter { @Override public int accept(Method method) { if ("hobby".equals(method.getName())){ return 1; }else { return 0; } } } public class Client { public static void main(String[] args) { Cat cat = (Cat) CglibProxy.getProxy(Cat.class); cat.call(); cat.hobby(); } }
執行結果
cglib before 0 .....
喵喵
cglib after 0 .....
cglib before 1 .....
吃魚
cglib after 1 .......
代理類分析
生成三個class檔案
Cat$$EnhancerByCGLIB$$182417b是代理類
Cat$$EnhancerByCGLIB$$182417b$$FastClassByCGLIB$$ec737f3b是代理類的FastClass
Cat$$FastClassByCGLIB$$6a5678e是被代理類的FastClass
public class Cat$$EnhancerByCGLIB$$182417b extends Cat implements Factory {
private boolean CGLIB$BOUND;
public static Object CGLIB$FACTORY_DATA;
private static final ThreadLocal CGLIB$THREAD_CALLBACKS;
private static final Callback[] CGLIB$STATIC_CALLBACKS;
private MethodInterceptor CGLIB$CALLBACK_0;
private MethodInterceptor CGLIB$CALLBACK_1;
private static Object CGLIB$CALLBACK_FILTER;
/*
* call()
*/
private static final Method CGLIB$call$0$Method;
private static final MethodProxy CGLIB$call$0$Proxy;
private static final Object[] CGLIB$emptyArgs;
/*
* hobby()
*/
private static final Method CGLIB$hobby$1$Method;
private static final MethodProxy CGLIB$hobby$1$Proxy;
private static final Method CGLIB$equals$2$Method;
private static final MethodProxy CGLIB$equals$2$Proxy;
private static final Method CGLIB$toString$3$Method;
private static final MethodProxy CGLIB$toString$3$Proxy;
private static final Method CGLIB$hashCode$4$Method;
private static final MethodProxy CGLIB$hashCode$4$Proxy;
private static final Method CGLIB$clone$5$Method;
private static final MethodProxy CGLIB$clone$5$Proxy;
static void CGLIB$STATICHOOK1() {
CGLIB$THREAD_CALLBACKS = new ThreadLocal();
CGLIB$emptyArgs = new Object[0];
Class var0 = Class.forName("agent.dynamic_agent_CGLIB.inner.Cat$$EnhancerByCGLIB$$182417b");
Class var1;
Method[] var10000 = ReflectUtils.findMethods(new String[]{"equals", "(Ljava/lang/Object;)Z", "toString", "()Ljava/lang/String;", "hashCode", "()I", "clone", "()Ljava/lang/Object;"}, (var1 = Class.forName("java.lang.Object")).getDeclaredMethods());
CGLIB$equals$2$Method = var10000[0];
CGLIB$equals$2$Proxy = MethodProxy.create(var1, var0, "(Ljava/lang/Object;)Z", "equals", "CGLIB$equals$2");
CGLIB$toString$3$Method = var10000[1];
CGLIB$toString$3$Proxy = MethodProxy.create(var1, var0, "()Ljava/lang/String;", "toString", "CGLIB$toString$3");
CGLIB$hashCode$4$Method = var10000[2];
CGLIB$hashCode$4$Proxy = MethodProxy.create(var1, var0, "()I", "hashCode", "CGLIB$hashCode$4");
CGLIB$clone$5$Method = var10000[3];
CGLIB$clone$5$Proxy = MethodProxy.create(var1, var0, "()Ljava/lang/Object;", "clone", "CGLIB$clone$5");
var10000 = ReflectUtils.findMethods(new String[]{"call", "()V", "hobby", "()V"}, (var1 = Class.forName("agent.dynamic_agent_CGLIB.inner.Cat")).getDeclaredMethods());
CGLIB$call$0$Method = var10000[0];
CGLIB$call$0$Proxy = MethodProxy.create(var1, var0, "()V", "call", "CGLIB$call$0");
CGLIB$hobby$1$Method = var10000[1];
CGLIB$hobby$1$Proxy = MethodProxy.create(var1, var0, "()V", "hobby", "CGLIB$hobby$1");
}
/*
*
*/
final void CGLIB$call$0() {
/*
* 呼叫的是父類Cat中的call()
*/
super.call();
}
public final void call() {
MethodInterceptor var10000 = this.CGLIB$CALLBACK_0;
if (var10000 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_0;
}
if (var10000 != null) {
/*
* 對應MethodInterceptor自定義實現類的intercept(Object o, Method method, Object[] args, MethodProxy methodProxy)
*/
var10000.intercept(this, CGLIB$call$0$Method, CGLIB$emptyArgs, CGLIB$call$0$Proxy);
} else {
super.call();
}
}
final void CGLIB$hobby$1() {
super.hobby();
}
public final void hobby() {
MethodInterceptor var10000 = this.CGLIB$CALLBACK_1;
if (var10000 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_1;
}
if (var10000 != null) {
var10000.intercept(this, CGLIB$hobby$1$Method, CGLIB$emptyArgs, CGLIB$hobby$1$Proxy);
} else {
super.hobby();
}
}
final boolean CGLIB$equals$2(Object var1) {
return super.equals(var1);
}
public final boolean equals(Object var1) {
MethodInterceptor var10000 = this.CGLIB$CALLBACK_0;
if (var10000 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_0;
}
if (var10000 != null) {
Object var2 = var10000.intercept(this, CGLIB$equals$2$Method, new Object[]{var1}, CGLIB$equals$2$Proxy);
return var2 == null ? false : (Boolean)var2;
} else {
return super.equals(var1);
}
}
final String CGLIB$toString$3() {
return super.toString();
}
public final String toString() {
MethodInterceptor var10000 = this.CGLIB$CALLBACK_0;
if (var10000 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_0;
}
return var10000 != null ? (String)var10000.intercept(this, CGLIB$toString$3$Method, CGLIB$emptyArgs, CGLIB$toString$3$Proxy) : super.toString();
}
final int CGLIB$hashCode$4() {
return super.hashCode();
}
public final int hashCode() {
MethodInterceptor var10000 = this.CGLIB$CALLBACK_0;
if (var10000 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_0;
}
if (var10000 != null) {
Object var1 = var10000.intercept(this, CGLIB$hashCode$4$Method, CGLIB$emptyArgs, CGLIB$hashCode$4$Proxy);
return var1 == null ? 0 : ((Number)var1).intValue();
} else {
return super.hashCode();
}
}
final Object CGLIB$clone$5() throws CloneNotSupportedException {
return super.clone();
}
protected final Object clone() throws CloneNotSupportedException {
MethodInterceptor var10000 = this.CGLIB$CALLBACK_0;
if (var10000 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_0;
}
return var10000 != null ? var10000.intercept(this, CGLIB$clone$5$Method, CGLIB$emptyArgs, CGLIB$clone$5$Proxy) : super.clone();
}
public static MethodProxy CGLIB$findMethodProxy(Signature var0) {
String var10000 = var0.toString();
switch(var10000.hashCode()) {
case -802851741:
if (var10000.equals("hobby()V")) {
return CGLIB$hobby$1$Proxy;
}
break;
case -508378822:
if (var10000.equals("clone()Ljava/lang/Object;")) {
return CGLIB$clone$5$Proxy;
}
break;
case 548576343:
if (var10000.equals("call()V")) {
return CGLIB$call$0$Proxy;
}
break;
case 1826985398:
if (var10000.equals("equals(Ljava/lang/Object;)Z")) {
return CGLIB$equals$2$Proxy;
}
break;
case 1913648695:
if (var10000.equals("toString()Ljava/lang/String;")) {
return CGLIB$toString$3$Proxy;
}
break;
case 1984935277:
if (var10000.equals("hashCode()I")) {
return CGLIB$hashCode$4$Proxy;
}
}
return null;
}
public Cat$$EnhancerByCGLIB$$182417b() {
CGLIB$BIND_CALLBACKS(this);
}
public static void CGLIB$SET_THREAD_CALLBACKS(Callback[] var0) {
CGLIB$THREAD_CALLBACKS.set(var0);
}
public static void CGLIB$SET_STATIC_CALLBACKS(Callback[] var0) {
CGLIB$STATIC_CALLBACKS = var0;
}
private static final void CGLIB$BIND_CALLBACKS(Object var0) {
Cat$$EnhancerByCGLIB$$182417b var1 = (Cat$$EnhancerByCGLIB$$182417b)var0;
if (!var1.CGLIB$BOUND) {
var1.CGLIB$BOUND = true;
Object var10000 = CGLIB$THREAD_CALLBACKS.get();
if (var10000 == null) {
var10000 = CGLIB$STATIC_CALLBACKS;
if (var10000 == null) {
return;
}
}
Callback[] var10001 = (Callback[])var10000;
var1.CGLIB$CALLBACK_1 = (MethodInterceptor)((Callback[])var10000)[1];
var1.CGLIB$CALLBACK_0 = (MethodInterceptor)var10001[0];
}
}
public Object newInstance(Callback[] var1) {
CGLIB$SET_THREAD_CALLBACKS(var1);
Cat$$EnhancerByCGLIB$$182417b var10000 = new Cat$$EnhancerByCGLIB$$182417b();
CGLIB$SET_THREAD_CALLBACKS((Callback[])null);
return var10000;
}
public Object newInstance(Callback var1) {
throw new IllegalStateException("More than one callback object required");
}
public Object newInstance(Class[] var1, Object[] var2, Callback[] var3) {
CGLIB$SET_THREAD_CALLBACKS(var3);
Cat$$EnhancerByCGLIB$$182417b var10000 = new Cat$$EnhancerByCGLIB$$182417b;
switch(var1.length) {
case 0:
var10000.<init>();
CGLIB$SET_THREAD_CALLBACKS((Callback[])null);
return var10000;
default:
throw new IllegalArgumentException("Constructor not found");
}
}
public Callback getCallback(int var1) {
CGLIB$BIND_CALLBACKS(this);
MethodInterceptor var10000;
switch(var1) {
case 0:
var10000 = this.CGLIB$CALLBACK_0;
break;
case 1:
var10000 = this.CGLIB$CALLBACK_1;
break;
default:
var10000 = null;
}
return var10000;
}
public void setCallback(int var1, Callback var2) {
switch(var1) {
case 0:
this.CGLIB$CALLBACK_0 = (MethodInterceptor)var2;
break;
case 1:
this.CGLIB$CALLBACK_1 = (MethodInterceptor)var2;
}
}
public Callback[] getCallbacks() {
CGLIB$BIND_CALLBACKS(this);
return new Callback[]{this.CGLIB$CALLBACK_0, this.CGLIB$CALLBACK_1};
}
public void setCallbacks(Callback[] var1) {
this.CGLIB$CALLBACK_0 = (MethodInterceptor)var1[0];
this.CGLIB$CALLBACK_1 = (MethodInterceptor)var1[1];
}
static {
CGLIB$STATICHOOK1();
}
}
方法呼叫
// methodProxy.invokeSuper()時呼叫
final void CGLIB$hobby$1() {
super.hobby();
}
// methodProxy.invoke()時呼叫
public final void hobby() {
MethodInterceptor var10000 = this.CGLIB$CALLBACK_1;
if (var10000 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_1;
}
if (var10000 != null) {
// 呼叫攔截器
var10000.intercept(this, CGLIB$hobby$1$Method, CGLIB$emptyArgs, CGLIB$hobby$1$Proxy);
} else {
super.hobby();
}
}
代理方法MethodProxy
每個被代理方法都有一個MethodProxy物件，這個代理方法物件是怎麼定位到對應的方法和MethodInterceptor
public class MethodProxy {
private Signature sig1;
private Signature sig2;
private MethodProxy.CreateInfo createInfo;
private final Object initLock = new Object();
private volatile MethodProxy.FastClassInfo fastClassInfo;
/*
* c1:被代理物件class c2:代理物件class desc:引數型別 name1:被代理方法名 name2:代理方法名
*/
public static MethodProxy create(Class c1, Class c2, String desc, String name1, String name2) {
MethodProxy proxy = new MethodProxy();
proxy.sig1 = new Signature(name1, desc); //方法簽名
proxy.sig2 = new Signature(name2, desc);
proxy.createInfo = new MethodProxy.CreateInfo(c1, c2);
return proxy;
}
private void init() {
if (this.fastClassInfo == null) {
synchronized(this.initLock) {
if (this.fastClassInfo == null) {
MethodProxy.CreateInfo ci = this.createInfo;
MethodProxy.FastClassInfo fci = new MethodProxy.FastClassInfo();
fci.f1 = helper(ci, ci.c1);
fci.f2 = helper(ci, ci.c2);
fci.i1 = fci.f1.getIndex(this.sig1);
fci.i2 = fci.f2.getIndex(this.sig2);
this.fastClassInfo = fci;
this.createInfo = null;
}
}
}
}
private static FastClass helper(MethodProxy.CreateInfo ci, Class type) {
Generator g = new Generator();
g.setType(type);
g.setClassLoader(ci.c2.getClassLoader());
g.setNamingPolicy(ci.namingPolicy);
g.setStrategy(ci.strategy);
g.setAttemptLoad(ci.attemptLoad);
return g.create();
}
private MethodProxy() {
}
public Signature getSignature() {
return this.sig1;
}
public String getSuperName() {
return this.sig2.getName();
}
public int getSuperIndex() {
this.init();
return this.fastClassInfo.i2;
}
FastClass getFastClass() {
this.init();
return this.fastClassInfo.f1;
}
FastClass getSuperFastClass() {
this.init();
return this.fastClassInfo.f2;
}
public static MethodProxy find(Class type, Signature sig) {
try {
Method m = type.getDeclaredMethod("CGLIB$findMethodProxy", MethodInterceptorGenerator.FIND_PROXY_TYPES);
return (MethodProxy)m.invoke((Object)null, sig);
} catch (NoSuchMethodException var3) {
throw new IllegalArgumentException("Class " + type + " does not use a MethodInterceptor");
} catch (IllegalAccessException var4) {
throw new CodeGenerationException(var4);
} catch (InvocationTargetException var5) {
throw new CodeGenerationException(var5);
}
}
public Object invoke(Object obj, Object[] args) throws Throwable {
try {
this.init();
MethodProxy.FastClassInfo fci = this.fastClassInfo;
return fci.f1.invoke(fci.i1, obj, args);
} catch (InvocationTargetException var4) {
throw var4.getTargetException();
} catch (IllegalArgumentException var5) {
if (this.fastClassInfo.i1 < 0) {
throw new IllegalArgumentException("Protected method: " + this.sig1);
} else {
throw var5;
}
}
}
/*
* 找到代理類FastClass，即fci.f2，obj:代理類物件
*/
public Object invokeSuper(Object obj, Object[] args) throws Throwable {
try {
this.init();
MethodProxy.FastClassInfo fci = this.fastClassInfo;
return fci.f2.invoke(fci.i2, obj, args);
} catch (InvocationTargetException var4) {
throw var4.getTargetException();
}
}
private static class CreateInfo {
Class c1;
Class c2;
NamingPolicy namingPolicy;
GeneratorStrategy strategy;
boolean attemptLoad;
public CreateInfo(Class c1, Class c2) {
this.c1 = c1;
this.c2 = c2;
AbstractClassGenerator fromEnhancer = AbstractClassGenerator.getCurrent();
if (fromEnhancer != null) {
this.namingPolicy = fromEnhancer.getNamingPolicy();
this.strategy = fromEnhancer.getStrategy();
this.attemptLoad = fromEnhancer.getAttemptLoad();
}
}
}
// FastClassInfo是MethodProxy的靜態內部類，通過init()也可以看出i1、i2是區分方法的
private static class FastClassInfo {
FastClass f1; // 被代理類FastClass
FastClass f2; // 代理類FastClass
int i1; // 被代理類方法index
int i2; // 代理類方法index
private FastClassInfo() {
}
}
}
FastClass機制
JDK動態代理攔截需要增強的方法，並通過反射呼叫該方法。CGLIB會為被代理類和代理類（兩者都是委託類）分別動態生成一個FastClass(abstract)子類，在FastClass子類中會為各自的委託類中的方法建立索引值。呼叫者根據方法簽名或者方法名+引數型別的方式得到索引值，再通過索引值定位到執行語句，並返回結果。
public abstract class FastClass {
private Class type;
protected FastClass() {
throw new Error("Using the FastClass empty constructor--please report to the cglib-devel mailing list");
}
protected FastClass(Class type) {
this.type = type;
}
public static FastClass create(Class type) {
return create(type.getClassLoader(), type);
}
/*
* 建立一個FastClass子類例項
*/
public static FastClass create(ClassLoader loader, Class type) {
FastClass.Generator gen = new FastClass.Generator();
gen.setType(type);
gen.setClassLoader(loader);
return gen.create();
}
public Object invoke(String name, Class[] parameterTypes, Object obj, Object[] args) throws InvocationTargetException {
return this.invoke(this.getIndex(name, parameterTypes), obj, args);
}
public Object newInstance() throws InvocationTargetException {
return this.newInstance(this.getIndex(Constants.EMPTY_CLASS_ARRAY), (Object[])null);
}
public Object newInstance(Class[] parameterTypes, Object[] args) throws InvocationTargetException {
return this.newInstance(this.getIndex(parameterTypes), args);
}
public FastMethod getMethod(Method method) {
return new FastMethod(this, method);
}
public FastConstructor getConstructor(Constructor constructor) {
return new FastConstructor(this, constructor);
}
public FastMethod getMethod(String name, Class[] parameterTypes) {
try {
return this.getMethod(this.type.getMethod(name, parameterTypes));
} catch (NoSuchMethodException var4) {
throw new NoSuchMethodError(var4.getMessage());
}
}
public FastConstructor getConstructor(Class[] parameterTypes) {
try {
return this.getConstructor(this.type.getConstructor(parameterTypes));
} catch (NoSuchMethodException var3) {
throw new NoSuchMethodError(var3.getMessage());
}
}
public String getName() {
return this.type.getName();
}
public Class getJavaClass() {
return this.type;
}
public String toString() {
return this.type.toString();
}
public int hashCode() {
return this.type.hashCode();
}
public boolean equals(Object o) {
return o != null && o instanceof FastClass ? this.type.equals(((FastClass)o).type) : false;
}
public abstract int getIndex(String var1, Class[] var2);
public abstract int getIndex(Class[] var1);
public abstract Object invoke(int var1, Object var2, Object[] var3) throws InvocationTargetException;
public abstract Object newInstance(int var1, Object[] var2) throws InvocationTargetException;
public abstract int getIndex(Signature var1);
public abstract int getMaxIndex();
protected static String getSignatureWithoutReturnType(String name, Class[] parameterTypes) {
StringBuffer sb = new StringBuffer();
sb.append(name);
sb.append('(');
for(int i = 0; i < parameterTypes.length; ++i) {
sb.append(Type.getDescriptor(parameterTypes[i]));
}
sb.append(')');
return sb.toString();
}
public static class Generator extends AbstractClassGenerator {
private static final Source SOURCE = new Source(FastClass.class.getName());
private Class type;
public Generator() {
super(SOURCE);
}
public void setType(Class type) {
this.type = type;
}
public FastClass create() {
this.setNamePrefix(this.type.getName());
return (FastClass)super.create(this.type.getName());
}
protected ClassLoader getDefaultClassLoader() {
return this.type.getClassLoader();
}
protected ProtectionDomain getProtectionDomain() {
return ReflectUtils.getProtectionDomain(this.type);
}
public void generateClass(ClassVisitor v) throws Exception {
new FastClassEmitter(v, this.getClassName(), this.type);
}
protected Object firstInstance(Class type) {
return ReflectUtils.newInstance(type, new Class[]{Class.class}, new Object[]{this.type});
}
protected Object nextInstance(Object instance) {
return instance;
}
}
}
動態生成一個FastClass子類
public class DelegateClass {
public DelegateClass() {
}
public DelegateClass(String string) {
}
public boolean add(String string, int i) {
System.out.println("This is add method: " + string + ", " + i);
return true;
}
public void update() {
System.out.println("This is update method");
}
}
// FastClass動態子類例項
System.setProperty(DebuggingClassWriter.DEBUG_LOCATION_PROPERTY, "D:\\FastClass");
FastClass fastClass = FastClass.create(DelegateClass.class);
DelegateClass$$FastClassByCGLIB$$9bb75a71是FastClass的子類例項，這個類和動態代理並沒有關聯，只是通過DelegateClass檢視動態生成的FastClass子類的結構
public class DelegateClass$$FastClassByCGLIB$$9bb75a71 extends FastClass {
public DelegateClass$$FastClassByCGLIB$$9bb75a71(Class var1) {
super(var1);
}
public int getIndex(Signature var1) {
String var10000 = var1.toString();
switch(var10000.hashCode()) {
case -1949253108:
if (var10000.equals("update()V")) {
return 1;
}
break;
case 837540553:
if (var10000.equals("add(Ljava/lang/String;I)Z")) {
return 0;
}
break;
case 1826985398:
if (var10000.equals("equals(Ljava/lang/Object;)Z")) {
return 2;
}
break;
case 1913648695:
if (var10000.equals("toString()Ljava/lang/String;")) {
return 3;
}
break;
case 1984935277:
if (var10000.equals("hashCode()I")) {
return 4;
}
}
return -1;
}
public int getIndex(String var1, Class[] var2) {
switch(var1.hashCode()) {
case -1776922004:
if (var1.equals("toString")) {
switch(var2.length) {
case 0:
return 3;
}
}
break;
case -1295482945:
if (var1.equals("equals")) {
switch(var2.length) {
case 1:
if (var2[0].getName().equals("java.lang.Object")) {
return 2;
}
}
}
break;
case -838846263:
if (var1.equals("update")) {
switch(var2.length) {
case 0:
return 1;
}
}
break;
case 96417:
if (var1.equals("add")) {
switch(var2.length) {
case 2:
if (var2[0].getName().equals("java.lang.String") && var2[1].getName().equals("int")) {
return 0;
}
}
}
break;
case 147696667:
if (var1.equals("hashCode")) {
switch(var2.length) {
case 0:
return 4;
}
}
}
return -1;
}
public int getIndex(Class[] var1) {
switch(var1.length) {
case 0:
return 0;
case 1:
if (var1[0].getName().equals("java.lang.String")) {
return 1;
}
default:
return -1;
}
}
public Object invoke(int var1, Object var2, Object[] var3) throws InvocationTargetException {
DelegateClass var10000 = (DelegateClass)var2;
int var10001 = var1;
try {
switch(var10001) {
case 0:
return new Boolean(var10000.add((String)var3[0], ((Number)var3[1]).intValue()));
case 1:
var10000.update();
return null;
case 2:
return new Boolean(var10000.equals(var3[0]));
case 3:
return var10000.toString();
case 4:
return new Integer(var10000.hashCode());
}
} catch (Throwable var4) {
throw new InvocationTargetException(var4);
}
throw new IllegalArgumentException("Cannot find matching method/constructor");
}
public Object newInstance(int var1, Object[] var2) throws InvocationTargetException {
DelegateClass var10000 = new DelegateClass;
DelegateClass var10001 = var10000;
int var10002 = var1;
try {
switch(var10002) {
case 0:
var10001.<init>();
return var10000;
case 1:
var10001.<init>((String)var2[0]);
return var10000;
}
} catch (Throwable var3) {
throw new InvocationTargetException(var3);
}
throw new IllegalArgumentException("Cannot find matching method/constructor");
}
public int getMaxIndex() {
return 4;
}
}
注: 為了方便檢視，將第一個案例中Cat的FastClass子類，和Cat代理類的FastClass子類一塊貼過來
被代理類FastClass子類
public class Cat$$FastClassByCGLIB$$6a5678e extends FastClass {
public Cat$$FastClassByCGLIB$$6a5678e(Class var1) {
super(var1);
}
public int getIndex(Signature var1) {
String var10000 = var1.toString();
switch(var10000.hashCode()) {
case -802851741:
if (var10000.equals("hobby()V")) {
return 1;
}
break;
case 548576343:
if (var10000.equals("call()V")) {
return 0;
}
break;
case 1826985398:
if (var10000.equals("equals(Ljava/lang/Object;)Z")) {
return 2;
}
break;
case 1913648695:
if (var10000.equals("toString()Ljava/lang/String;")) {
return 3;
}
break;
case 1984935277:
if (var10000.equals("hashCode()I")) {
return 4;
}
}
return -1;
}
public int getIndex(String var1, Class[] var2) {
switch(var1.hashCode()) {
case -1776922004:
if (var1.equals("toString")) {
switch(var2.length) {
case 0:
return 3;
}
}
break;
case -1295482945:
if (var1.equals("equals")) {
switch(var2.length) {
case 1:
if (var2[0].getName().equals("java.lang.Object")) {
return 2;
}
}
}
break;
case 3045982:
if (var1.equals("call")) {
switch(var2.length) {
case 0:
return 0;
}
}
break;
case 99450322:
if (var1.equals("hobby")) {
switch(var2.length) {
case 0:
return 1;
}
}
break;
case 147696667:
if (var1.equals("hashCode")) {
switch(var2.length) {
case 0:
return 4;
}
}
}
return -1;
}
public int getIndex(Class[] var1) {
switch(var1.length) {
case 0:
return 0;
default:
return -1;
}
}
public Object invoke(int var1, Object var2, Object[] var3) throws InvocationTargetException {
Cat var10000 = (Cat)var2;
int var10001 = var1;
try {
switch(var10001) {
case 0:
var10000.call();
return null;
case 1:
var10000.hobby();
return null;
case 2:
return new Boolean(var10000.equals(var3[0]));
case 3:
return var10000.toString();
case 4:
return new Integer(var10000.hashCode());
}
} catch (Throwable var4) {
throw new InvocationTargetException(var4);
}
throw new IllegalArgumentException("Cannot find matching method/constructor");
}
public Object newInstance(int var1, Object[] var2) throws InvocationTargetException {
Cat var10000 = new Cat;
Cat var10001 = var10000;
int var10002 = var1;
try {
switch(var10002) {
case 0:
var10001.<init>();
return var10000;
}
} catch (Throwable var3) {
throw new InvocationTargetException(var3);
}
throw new IllegalArgumentException("Cannot find matching method/constructor");
}
public int getMaxIndex() {
return 4;
}
}
代理類的FastClass子類
public class Cat$$EnhancerByCGLIB$$182417b$$FastClassByCGLIB$$ec737f3b extends FastClass {
public Cat$$EnhancerByCGLIB$$182417b$$FastClassByCGLIB$$ec737f3b(Class var1) {
super(var1);
}
public int getIndex(Signature var1) {
String var10000 = var1.toString();
switch(var10000.hashCode()) {
case -2055565910:
if (var10000.equals("CGLIB$SET_THREAD_CALLBACKS([Lnet/sf/cglib/proxy/Callback;)V")) {
return 14;
}
break;
case -1525753240:
if (var10000.equals("CGLIB$call$0()V")) {
return 20;
}
break;
case -1457535688:
if (var10000.equals("CGLIB$STATICHOOK1()V")) {
return 16;
}
break;
case -1411812934:
if (var10000.equals("CGLIB$hashCode$4()I")) {
return 22;
}
break;
case -894172689:
if (var10000.equals("newInstance(Lnet/sf/cglib/proxy/Callback;)Ljava/lang/Object;")) {
return 5;
}
break;
case -802851741:
if (var10000.equals("hobby()V")) {
return 9;
}
break;
case -623122092:
if (var10000.equals("CGLIB$findMethodProxy(Lnet/sf/cglib/core/Signature;)Lnet/sf/cglib/proxy/MethodProxy;")) {
return 15;
}
break;
case -508378822:
if (var10000.equals("clone()Ljava/lang/Object;")) {
return 3;
}
break;
case -419626537:
if (var10000.equals("setCallbacks([Lnet/sf/cglib/proxy/Callback;)V")) {
return 7;
}
break;
case 374345669:
if (var10000.equals("CGLIB$equals$2(Ljava/lang/Object;)Z")) {
return 18;
}
break;
case 548576343:
if (var10000.equals("call()V")) {
return 8;
}
break;
case 560567118:
if (var10000.equals("setCallback(ILnet/sf/cglib/proxy/Callback;)V")) {
return 10;
}
break;
case 811063227:
if (var10000.equals("newInstance([Ljava/lang/Class;[Ljava/lang/Object;[Lnet/sf/cglib/proxy/Callback;)Ljava/lang/Object;")) {
return 4;
}
break;
case 973717575:
if (var10000.equals("getCallbacks()[Lnet/sf/cglib/proxy/Callback;")) {
return 12;
}
break;
case 1221173700:
if (var10000.equals("newInstance([Lnet/sf/cglib/proxy/Callback;)Ljava/lang/Object;")) {
return 6;
}
break;
case 1230699260:
if (var10000.equals("getCallback(I)Lnet/sf/cglib/proxy/Callback;")) {
return 11;
}
break;
case 1318488633:
if (var10000.equals("CGLIB$hobby$1()V")) {
return 19;
}
break;
case 1517819849:
if (var10000.equals("CGLIB$toString$3()Ljava/lang/String;")) {
return 21;
}
break;
case 1584330438:
if (var10000.equals("CGLIB$SET_STATIC_CALLBACKS([Lnet/sf/cglib/proxy/Callback;)V")) {
return 13;
}
break;
case 1826985398:
if (var10000.equals("equals(Ljava/lang/Object;)Z")) {
return 0;
}
break;
case 1913648695:
if (var10000.equals("toString()Ljava/lang/String;")) {
return 1;
}
break;
case 1984935277:
if (var10000.equals("hashCode()I")) {
return 2;
}
break;
case 2011844968:
if (var10000.equals("CGLIB$clone$5()Ljava/lang/Object;")) {
return 17;
}
}
return -1;
}
public int getIndex(String var1, Class[] var2) {
switch(var1.hashCode()) {
case -2126895172:
if (var1.equals("CGLIB$hobby$1")) {
switch(var2.length) {
case 0:
return 19;
}
}
break;
case -1776922004:
if (var1.equals("toString")) {
switch(var2.length) {
case 0:
return 1;
}
}
break;
case -1295482945:
if (var1.equals("equals")) {
switch(var2.length) {
case 1:
if (var2[0].getName().equals("java.lang.Object")) {
return 0;
}
}
}
break;
case -1053468136:
if (var1.equals("getCallbacks")) {
switch(var2.length) {
case 0:
return 12;
}
}
break;
case -124978608:
if (var1.equals("CGLIB$equals$2")) {
switch(var2.length) {
case 1:
if (var2[0].getName().equals("java.lang.Object")) {
return 18;
}
}
}
break;
case -60403779:
if (var1.equals("CGLIB$SET_STATIC_CALLBACKS")) {
switch(var2.length) {
case 1:
if (var2[0].getName().equals("[Lnet.sf.cglib.proxy.Callback;")) {
return 13;
}
}
}
break;
case -29025554:
if (var1.equals("CGLIB$hashCode$4")) {
switch(var2.length) {
case 0:
return 22;
}
}
break;
case 3045982:
if (var1.equals("call")) {
switch(var2.length) {
case 0:
return 8;
}
}
break;
case 52714989:
if (var1.equals("CGLIB$call$0")) {
switch(var2.length) {
case 0:
return 20;
}
}
break;
case 85179481:
if (var1.equals("CGLIB$SET_THREAD_CALLBACKS")) {
switch(var2.length) {
case 1:
if (var2[0].getName().equals("[Lnet.sf.cglib.proxy.Callback;")) {
return 14;
}
}
}
break;
case 94756189:
if (var1.equals("clone")) {
switch(var2.length) {
case 0:
return 3;
}
}
break;
case 99450322:
if (var1.equals("hobby")) {
switch(var2.length) {
case 0:
return 9;
}
}
break;
case 147696667:
if (var1.equals("hashCode")) {
switch(var2.length) {
case 0:
return 2;
}
}
break;
case 161998109:
if (var1.equals("CGLIB$STATICHOOK1")) {
switch(var2.length) {
case 0:
return 16;
}
}
break;
case 495524492:
if (var1.equals("setCallbacks")) {
switch(var2.length) {
case 1:
if (var2[0].getName().equals("[Lnet.sf.cglib.proxy.Callback;")) {
return 7;
}
}
}
break;
case 1154623345:
if (var1.equals("CGLIB$findMethodProxy")) {
switch(var2.length) {
case 1:
if (var2[0].getName().equals("net.sf.cglib.core.Signature")) {
return 15;
}
}
}
break;
case 1543336190:
if (var1.equals("CGLIB$toString$3")) {
switch(var2.length) {
case 0:
return 21;
}
}
break;
case 1811874389:
if (var1.equals("newInstance")) {
switch(var2.length) {
case 1:
String var10001 = var2[0].getName();
switch(var10001.hashCode()) {
case -845341380:
if (var10001.equals("net.sf.cglib.proxy.Callback")) {
return 5;
}
break;
case 1730110032:
if (var10001.equals("[Lnet.sf.cglib.proxy.Callback;")) {
return 6;
}
}
case 2:
default:
break;
case 3:
if (var2[0].getName().equals("[Ljava.lang.Class;") && var2[1].getName().equals("[Ljava.lang.Object;") && var2[2].getName().equals("[Lnet.sf.cglib.proxy.Callback;")) {
return 4;
}
}
}
break;
case 1817099975:
if (var1.equals("setCallback")) {
switch(var2.length) {
case 2:
if (var2[0].getName().equals("int") && var2[1].getName().equals("net.sf.cglib.proxy.Callback")) {
return 10;
}
}
}
break;
case 1905679803:
if (var1.equals("getCallback")) {
switch(var2.length) {
case 1:
if (var2[0].getName().equals("int")) {
return 11;
}
}
}
break;
case 1951977611:
if (var1.equals("CGLIB$clone$5")) {
switch(var2.length) {
case 0:
return 17;
}
}
}
return -1;
}
public int getIndex(Class[] var1) {
switch(var1.length) {
case 0:
return 0;
default:
return -1;
}
}
public Object invoke(int var1, Object var2, Object[] var3) throws InvocationTargetException {
182417b var10000 = (182417b)var2;
int var10001 = var1;
try {
switch(var10001) {
case 0:
return new Boolean(var10000.equals(var3[0]));
case 1:
return var10000.toString();
case 2:
return new Integer(var10000.hashCode());
case 3:
return var10000.clone();
case 4:
return var10000.newInstance((Class[])var3[0], (Object[])var3[1], (Callback[])var3[2]);
case 5:
return var10000.newInstance((Callback)var3[0]);
case 6:
return var10000.newInstance((Callback[])var3[0]);
case 7:
var10000.setCallbacks((Callback[])var3[0]);
return null;
case 8:
var10000.call();
return null;
case 9:
var10000.hobby();
return null;
case 10:
var10000.setCallback(((Number)var3[0]).intValue(), (Callback)var3[1]);
return null;
case 11:
return var10000.getCallback(((Number)var3[0]).intValue());
case 12:
return var10000.getCallbacks();
case 13:
182417b.CGLIB$SET_STATIC_CALLBACKS((Callback[])var3[0]);
return null;
case 14:
182417b.CGLIB$SET_THREAD_CALLBACKS((Callback[])var3[0]);
return null;
case 15:
return 182417b.CGLIB$findMethodProxy((Signature)var3[0]);
case 16:
182417b.CGLIB$STATICHOOK1();
return null;
case 17:
return var10000.CGLIB$clone$5();
case 18:
return new Boolean(var10000.CGLIB$equals$2(var3[0]));
case 19:
var10000.CGLIB$hobby$1();
return null;
case 20:
var10000.CGLIB$call$0();
return null;
case 21:
return var10000.CGLIB$toString$3();
case 22:
return new Integer(var10000.CGLIB$hashCode$4());
}
} catch (Throwable var4) {
throw new InvocationTargetException(var4);
}
throw new IllegalArgumentException("Cannot find matching method/constructor");
}
public Object newInstance(int var1, Object[] var2) throws InvocationTargetException {
182417b var10000 = new 182417b;
182417b var10001 = var10000;
int var10002 = var1;
try {
switch(var10002) {
case 0:
var10001.<init>();
return var10000;
}
} catch (Throwable var3) {
throw new InvocationTargetException(var3);
}
throw new IllegalArgumentException("Cannot find matching method/constructor");
}
public int getMaxIndex() {
return 22;
}
}