Java SQL Warning getCauseUsingWellKnownTypes(Throwable throwable)

Description

Finds a Throwable for known types.

Uses instanceof checks to examine the exception, looking for well known types which could contain chained or wrapped exceptions.

License

Apache License

Parameter

Parameter	Description
throwable	the exception to examine

Return

the wrapped exception, or null if not found

Declaration

private static Throwable getCauseUsingWellKnownTypes(Throwable throwable)

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright 2012 Internet2/*from www .  j ava2 s . c om*/
 * 
 * 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.
 ******************************************************************************/

import java.lang.reflect.InvocationTargetException;

import java.sql.SQLException;

public class Main {
    /**
     * <p>Finds a <code>Throwable</code> for known types.</p>
     * 
     * <p>Uses <code>instanceof</code> checks to examine the exception,
     * looking for well known types which could contain chained or
     * wrapped exceptions.</p>
     *
     * @param throwable  the exception to examine
     * @return the wrapped exception, or <code>null</code> if not found
     */
    private static Throwable getCauseUsingWellKnownTypes(Throwable throwable) {
        if (throwable instanceof SQLException) {
            return ((SQLException) throwable).getNextException();
        } else if (throwable instanceof InvocationTargetException) {
            return ((InvocationTargetException) throwable).getTargetException();
        } else {
            return null;
        }
    }
}