/**
 * Copyright 2010 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 org.apache.helix.zookeeper.zkclient;

import org.apache.helix.zookeeper.zkclient.exception.ZkInterruptedException;


public class ExceptionUtil {

    public static RuntimeException convertToRuntimeException(Throwable e) {
        if (e instanceof RuntimeException) {
            return (RuntimeException) e;
        }
        retainInterruptFlag(e);
        return new RuntimeException(e);
    }

    /**
     * This sets the interrupt flag if the catched exception was an {@link InterruptedException}. Catching such an
     * exception always clears the interrupt flag.
     *
     * @param catchedException
     *            The catched exception.
     */
    public static void retainInterruptFlag(Throwable catchedException) {
        if (catchedException instanceof InterruptedException) {
            Thread.currentThread().interrupt();
        }
    }

    public static void rethrowInterruptedException(Throwable e) throws InterruptedException {
        if (e instanceof InterruptedException) {
            throw (InterruptedException) e;
        }
        if (e instanceof ZkInterruptedException) {
            throw (ZkInterruptedException) e;
        }
    }
}
