ExceptionUtil.java

//
// 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 com.cloud.utils.exception;

import java.io.PrintWriter;
import java.io.StringWriter;

public class ExceptionUtil {
    public static String toString(Throwable th) {
        return toString(th, true);
    }

    public static String toString(Throwable th, boolean printStack) {
        final StringWriter writer = new StringWriter();
        writer.append("Exception: " + th.getClass().getName() + "\n");
        writer.append("Message: ");
        writer.append(th.getMessage()).append("\n");

        if (printStack) {
            writer.append("Stack: ");
            th.printStackTrace(new PrintWriter(writer));
        }
        return writer.toString();
    }

    @SuppressWarnings("unchecked")
    public static <T extends Throwable> void rethrow(Throwable t, Class<T> clz) throws T {
        if (clz.isAssignableFrom(t.getClass()))
            throw (T)t;
    }

    public static <T extends Throwable> void rethrowRuntime(Throwable t) {
        rethrow(t, RuntimeException.class);
        rethrow(t, Error.class);
    }

}