Example usage for org.springframework.cglib.proxy Enhancer createClass

Introduction

In this page you can find the example usage for org.springframework.cglib.proxy Enhancer createClass.

Prototype

public Class createClass() 

Source Link

Document

Generate a new class if necessary and return it without creating a new instance.

Usage

From source file:com.newtranx.util.cassandra.spring.MapperScannerConfigurer.java

@SuppressWarnings("unchecked")
private static <T> T createProxy(final Class<?> classToMock, final MethodInterceptor interceptor) {
    final Enhancer enhancer = new Enhancer();
    enhancer.setSuperclass(classToMock);
    enhancer.setCallbackType(interceptor.getClass());
    final Class<?> proxyClass = enhancer.createClass();
    Enhancer.registerCallbacks(proxyClass, new Callback[] { interceptor });
    return (T) ObjenesisHelper.newInstance(proxyClass);
}

---

From source file:com.example.post.MyConfigurationClassEnhancer.java

/**
 * Uses enhancer to generate a subclass of superclass,
 * ensuring that callbacks are registered for the new subclass.
 *//*from   ww w.  j  a  v  a  2  s  . c  om*/
private Class<?> createClass(Enhancer enhancer) {
    Class<?> subclass = enhancer.createClass();
    // Registering callbacks statically (as opposed to thread-local)
    // is critical for usage in an OSGi environment (SPR-5932)...
    Enhancer.registerStaticCallbacks(subclass, CALLBACKS);
    return subclass;
}

---

From source file:org.springframework.aop.framework.ObjenesisCglibAopProxy.java

@Override
@SuppressWarnings("unchecked")
protected Object createProxyClassAndInstance(Enhancer enhancer, Callback[] callbacks) {
    Class<?> proxyClass = enhancer.createClass();
    Object proxyInstance = null;//from w ww .  ja v  a 2 s.co m

    if (objenesis.isWorthTrying()) {
        try {
            proxyInstance = objenesis.newInstance(proxyClass, enhancer.getUseCache());
        } catch (Throwable ex) {
            logger.debug("Unable to instantiate proxy using Objenesis, "
                    + "falling back to regular proxy construction", ex);
        }
    }

    if (proxyInstance == null) {
        // Regular instantiation via default constructor...
        try {
            Constructor<?> ctor = (this.constructorArgs != null
                    ? proxyClass.getDeclaredConstructor(this.constructorArgTypes)
                    : proxyClass.getDeclaredConstructor());
            ReflectionUtils.makeAccessible(ctor);
            proxyInstance = (this.constructorArgs != null ? ctor.newInstance(this.constructorArgs)
                    : ctor.newInstance());
        } catch (Throwable ex) {
            throw new AopConfigException("Unable to instantiate proxy using Objenesis, "
                    + "and regular proxy instantiation via default constructor fails as well", ex);
        }
    }

    ((Factory) proxyInstance).setCallbacks(callbacks);
    return proxyInstance;
}

---

From source file:org.springframework.cloud.iot.coap.method.ResolvableMethod.java

@SuppressWarnings("unchecked")
private static <T> T initProxy(Class<?> type, MethodInvocationInterceptor interceptor) {
    Assert.notNull(type, "'type' must not be null");
    if (type.isInterface()) {
        ProxyFactory factory = new ProxyFactory(EmptyTargetSource.INSTANCE);
        factory.addInterface(type);//from w  w  w.j av a 2 s .c  o m
        factory.addInterface(Supplier.class);
        factory.addAdvice(interceptor);
        return (T) factory.getProxy();
    }

    else {
        Enhancer enhancer = new Enhancer();
        enhancer.setSuperclass(type);
        enhancer.setInterfaces(new Class<?>[] { Supplier.class });
        enhancer.setNamingPolicy(SpringNamingPolicy.INSTANCE);
        enhancer.setCallbackType(org.springframework.cglib.proxy.MethodInterceptor.class);

        Class<?> proxyClass = enhancer.createClass();
        Object proxy = null;

        if (objenesis.isWorthTrying()) {
            try {
                proxy = objenesis.newInstance(proxyClass, enhancer.getUseCache());
            } catch (ObjenesisException ex) {
                logger.debug("Objenesis failed, falling back to default constructor", ex);
            }
        }

        if (proxy == null) {
            try {
                proxy = ReflectionUtils.accessibleConstructor(proxyClass).newInstance();
            } catch (Throwable ex) {
                throw new IllegalStateException("Unable to instantiate proxy "
                        + "via both Objenesis and default constructor fails as well", ex);
            }
        }

        ((Factory) proxy).setCallbacks(new Callback[] { interceptor });
        return (T) proxy;
    }
}

---

From source file:org.springframework.web.servlet.mvc.method.annotation.MvcUriComponentsBuilder.java

@SuppressWarnings("unchecked")
private static <T> T initProxy(Class<?> type, ControllerMethodInvocationInterceptor interceptor) {
    if (type.isInterface()) {
        ProxyFactory factory = new ProxyFactory(EmptyTargetSource.INSTANCE);
        factory.addInterface(type);/*from  w w w  .  ja  v  a  2s  . com*/
        factory.addInterface(MethodInvocationInfo.class);
        factory.addAdvice(interceptor);
        return (T) factory.getProxy();
    }

    else {
        Enhancer enhancer = new Enhancer();
        enhancer.setSuperclass(type);
        enhancer.setInterfaces(new Class<?>[] { MethodInvocationInfo.class });
        enhancer.setNamingPolicy(SpringNamingPolicy.INSTANCE);
        enhancer.setCallbackType(org.springframework.cglib.proxy.MethodInterceptor.class);

        Class<?> proxyClass = enhancer.createClass();
        Object proxy = null;

        if (objenesis.isWorthTrying()) {
            try {
                proxy = objenesis.newInstance(proxyClass, enhancer.getUseCache());
            } catch (ObjenesisException ex) {
                logger.debug("Unable to instantiate controller proxy using Objenesis, "
                        + "falling back to regular construction", ex);
            }
        }

        if (proxy == null) {
            try {
                proxy = ReflectionUtils.accessibleConstructor(proxyClass).newInstance();
            } catch (Throwable ex) {
                throw new IllegalStateException(
                        "Unable to instantiate controller proxy using Objenesis, "
                                + "and regular controller instantiation via default constructor fails as well",
                        ex);
            }
        }

        ((Factory) proxy).setCallbacks(new Callback[] { interceptor });
        return (T) proxy;
    }
}

---

From source file:org.springframework.web.servlet.mvc.support.MvcUrlUtils.java

@SuppressWarnings("unchecked")
private static <T> T initProxy(Class<?> type, ControllerMethodInvocationInterceptor interceptor) {

    if (type.isInterface()) {
        ProxyFactory factory = new ProxyFactory(EmptyTargetSource.INSTANCE);
        factory.addInterface(type);/*from ww  w .  ja v a  2 s.  co  m*/
        factory.addInterface(ControllerMethodValues.class);
        factory.addAdvice(interceptor);
        return (T) factory.getProxy();
    } else {
        Enhancer enhancer = new Enhancer();
        enhancer.setSuperclass(type);
        enhancer.setInterfaces(new Class<?>[] { ControllerMethodValues.class });
        enhancer.setCallbackType(org.springframework.cglib.proxy.MethodInterceptor.class);

        Factory factory = (Factory) OBJENESIS.newInstance(enhancer.createClass());
        factory.setCallbacks(new Callback[] { interceptor });
        return (T) factory;
    }
}

---