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/*
 * Copyright (c) 2020, 2021 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Distribution License v. 1.0, which is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

package cn.lzgabel.jaxb.core;

/**
 * Utils for stack trace analysis. Indirection so that a more efficient
 * implementation can be used in later Java versions.
 *
 * @author Philippe Marschall
 */
final class StackHelper {
    private StackHelper() {}   // no instanciation

    /**
     * Returns the name of the calling class of the second method in the call chain of this method.
     *
     * @return the name of the caller class
     * @throws SecurityException in case a security manager is installed that
     *                           prevents stack introspection
     */
    static String getCallerClassName() {
       StackTraceElement[] trace = new Exception().getStackTrace();
       if (2 < trace.length) {
           return trace[2].getClassName();
       }
       return "cn.lzgabel.jaxb.core"; // use the default
    }
}