net.hasor.db.datasource.CloseSuppressingInvocationHandler Maven / Gradle / Ivy
/*
* Copyright 2002-2005 the original author or authors.
*
* 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 net.hasor.db.datasource;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.sql.Connection;
/**
* Connection 接口代理，目的是为了控制一些方法的调用。同时进行一些特殊类型的处理。
* @version : 2013-10-30
* @author 赵永春 ([email protected])
*/
class CloseSuppressingInvocationHandler implements InvocationHandler {
private final ConnectionHolder holder;
CloseSuppressingInvocationHandler(ConnectionHolder holder) {
this.holder = holder;
this.holder.requested();//ref++
}
@Override
public Object invoke(final Object proxy, final Method method, final Object[] args) throws Throwable {
Connection connection = holder.getConnection();
//
if (method.getName().equals("getTargetConnection")) {
return connection;
} else if (method.getName().equals("getTargetSource")) {
return this.holder.getDataSource();
} else if (method.getName().equals("toString")) {
return this.holder.toString();
} else if (method.getName().equals("equals")) {
return proxy == args[0];
} else if (method.getName().equals("hashCode")) {
return System.identityHashCode(proxy);
} else if (method.getName().equals("close")) {
if (holder.isOpen()) {
holder.released();//ref--
}
return null;
}
//
try {
return method.invoke(connection, args);
} catch (InvocationTargetException ex) {
throw ex.getTargetException();
}
}
}