/**
* Copyright 2005-2013 Dozer Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.dozer.functional_tests.runner;
import javassist.util.proxy.MethodHandler;
import javassist.util.proxy.ProxyFactory;
import org.dozer.MappingException;
import org.dozer.functional_tests.DataObjectInstantiator;
import org.dozer.util.MappingUtils;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
public class JavassistDataObjectInstantiator implements DataObjectInstantiator {
public static final DataObjectInstantiator INSTANCE = new JavassistDataObjectInstantiator();
private JavassistDataObjectInstantiator() {
}
@Override
public String getName() {
return "javassist";
}
public <T> T newInstance(Class<T> classToInstantiate) {
Class newClass = proxiedClass(classToInstantiate);
Object instance;
try {
instance = newClass.newInstance();
} catch (Exception e) {
throw new MappingException(e);
}
return (T) instance;
}
public <T> T newInstance(Class<T> classToInstantiate, Object[] args) {
Class newClass = proxiedClass(classToInstantiate);
Object instance;
try {
Class[] argTypes = new Class[args.length];
for (int i = 0; i < args.length; i++) {
argTypes[i] = MappingUtils.getRealClass(args[i].getClass());
}
Constructor constructor = newClass.getDeclaredConstructor(argTypes);
instance = constructor.newInstance(args);
} catch (Exception e) {
throw new MappingException(e);
}
return (T) instance;
}
public Object newInstance(Class<?>[] interfacesToProxy, Object target) {
ProxyFactory proxyFactory = new ProxyFactory();
proxyFactory.setInterfaces(interfacesToProxy);
Object instance;
try {
instance = proxyFactory.create(new Class[0], new Object[0], new MethodHandler() {
@Override
public Object invoke(Object self, Method thisMethod, Method proceed, Object[] args) throws Throwable {
return proceed.invoke(self, args);
}
});
} catch (Exception e) {
throw new MappingException(e);
}
return instance;
}
private <T> Class proxiedClass(Class<T> classToInstantiate) {
ProxyFactory proxyFactory = new ProxyFactory();
proxyFactory.setSuperclass(classToInstantiate);
return proxyFactory.createClass();
}
}