io.netty.channel.ReflectiveChannelFactory Maven / Gradle / Ivy
/*
* Copyright 2014 The Netty Project
*
* The Netty Project licenses this file to you 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:
*
* https://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 io.netty.channel;
import io.netty.util.internal.ObjectUtil;
import io.netty.util.internal.StringUtil;
import java.lang.reflect.Constructor;
/**
* A {@link ChannelFactory} that instantiates a new {@link Channel} by invoking its default constructor reflectively.
*/
public class ReflectiveChannelFactory implements ChannelFactory {
private final Constructor constructor;
public ReflectiveChannelFactory(Class clazz) {
ObjectUtil.checkNotNull(clazz, "clazz");
try {
this.constructor = clazz.getConstructor();
} catch (NoSuchMethodException e) {
throw new IllegalArgumentException("Class " + StringUtil.simpleClassName(clazz) +
" does not have a public non-arg constructor", e);
}
}
@Override
public T newChannel() {
try {
return constructor.newInstance();
} catch (Throwable t) {
throw new ChannelException("Unable to create Channel from class " + constructor.getDeclaringClass(), t);
}
}
@Override
public String toString() {
return StringUtil.simpleClassName(ReflectiveChannelFactory.class) +
'(' + StringUtil.simpleClassName(constructor.getDeclaringClass()) + ".class)";
}
}