/*************************GO-LICENSE-START*********************************
 * Copyright 2014 ThoughtWorks, Inc.
 *
 * 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.
 *************************GO-LICENSE-END***********************************/

package com.thoughtworks.go.util;

/**
 *
 */
public final class ExceptionUtils {
    private ExceptionUtils() {

    }

    public static RuntimeException bomb(String msg) {
        throw new RuntimeException(msg);
    }

    public static RuntimeException bomb() {
        throw new RuntimeException();
    }

    public static RuntimeException bomb(Throwable t) {
        throw new RuntimeException(t.getMessage(), t);
    }

    public static RuntimeException bomb(String msg, Throwable t) {
        throw new RuntimeException(msg, t);
    }

    public static void bombIfNull(Object o, String msg) {
        bombIf(o == null, msg);
    }


    public static void bombIfFailedToRunCommandLine(int returnValue, String msg) throws Exception {
        if (returnValue != 0) {
            throw new Exception(msg);
        }
    }

    public static void bombIf(boolean check, String msg) {
        if (check) {
            throw bomb(msg);
        }
    }

    public static void bombUnless(boolean check, String msg) {
        bombIf(!check, msg);
    }

    public static RuntimeException methodNotImplemented() {
        throw bomb("Not yet implemented");
    }

    public static String messageOf(Throwable t) {
        String message = t.getMessage();
        return (message == null || message.isEmpty()) ? t.getClass().toString() : message;
    }

    public static <T> T getCause(Throwable exception, Class<T> type) {
        Throwable cause;
        while ((cause = exception.getCause()) != null) {
            if (type.isAssignableFrom(cause.getClass())) {
                return (T) cause;
            }
            exception = cause;
        }
        return null;
    }
}