// 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.impala.util;

import java.util.Arrays;

import java.util.stream.Collectors;

public class ClassUtil {

/**

* Returns the current method name.

*

* Note: this method may be expensive. Use it judiciously.

*/

public static String getMethodName() {

StackTraceElement stackTrace = Thread.currentThread().getStackTrace()[2];

return stackTrace.getClassName() + "." + stackTrace.getMethodName() + "()";

}

/**

* Retrieves the current thread's stack trace and converts it into a string

* representation.

* <p> The first two elements of the stack trace are skipped:

* <ul>

* <li> {@code java.lang.Thread.getStackTrace()}</li>

* <li> This method itself (i.e., {@link ClassUtil#getStackTraceForThread()})</li>

* </ul>

*

* @return The caller's stack trace as a formatted string, excluding internal frames

*/

public static String getStackTraceForThread() {

return Arrays.stream(Thread.currentThread().getStackTrace())

.skip(2)

.map(StackTraceElement::toString)

.collect(Collectors.joining("\n\tat "));

}

}