org.apache.tomcat.jdbc.pool.TrapException Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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
*
* 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.apache.tomcat.jdbc.pool;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.sql.SQLException;
/**
* Interceptor that traps any unhandled exception types and throws an exception that has been declared by the method
* called, or throw a SQLException if it is declared.
* If the caught exception is not declared, and the method doesn't throw SQLException, then this interceptor will
* throw a RuntimeException
*
*/
public class TrapException extends JdbcInterceptor {
public TrapException() {
}
@Override
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
try {
return super.invoke(proxy, method, args);
}catch (Exception t) {
Throwable exception = t;
if (t instanceof InvocationTargetException && t.getCause() != null) {
exception = t.getCause();
if (exception instanceof Error) {
throw exception;
}
}
Class exceptionClass = exception.getClass();
if (!isDeclaredException(method, exceptionClass)) {
if (isDeclaredException(method,SQLException.class)) {
SQLException sqlx = new SQLException("Uncaught underlying exception.");
sqlx.initCause(exception);
exception = sqlx;
} else {
RuntimeException rx = new RuntimeException("Uncaught underlying exception.");
rx.initCause(exception);
exception = rx;
}
}
throw exception;
}
}
public boolean isDeclaredException(Method m, Class clazz) {
for (Class cl : m.getExceptionTypes()) {
if (cl.equals(clazz) || cl.isAssignableFrom(clazz)) return true;
}
return false;
}
/**
* no-op for this interceptor. no state is stored.
*/
@Override
public void reset(ConnectionPool parent, PooledConnection con) {
// NOOP
}
}