/*
 * Copyright 2019, TeamDev. All rights reserved.
 *
 * Redistribution and use in source and/or binary forms, with or without
 * modification, must retain the above copyright notice and the following
 * disclaimer.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package io.spine.security;

/**
 * Provides information about the class calling a method.
 */
final class CallerProvider extends SecurityManager {

    private static final CallerProvider INSTANCE = new CallerProvider();

    /**
     * Obtains the instance.
     */
    static CallerProvider instance() {
        return INSTANCE;
    }

    /**
     * Obtains the class of the object which calls the method from which this method
     * is being called.
     */
    Class getCallerClass() {
        Class[] context = getClassContext();
        Class result = context[2];
        return result;
    }

    /**
     * Obtains the class preceding in call chain the class which calls the
     * method from which this method is being called.
     */
    Class getPreviousCallerClass() {
        Class[] context = getClassContext();
        Class result = context[3];
        return result;
    }
}

/*
 * Copyright 2019, TeamDev. All rights reserved.
 *
 * Redistribution and use in source and/or binary forms, with or without
 * modification, must retain the above copyright notice and the following
 * disclaimer.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package io.spine.security;

/**
 * Provides information about the class calling a method.
 */
final class CallerProvider extends SecurityManager {

    private static final CallerProvider INSTANCE = new CallerProvider();

    /**
     * Obtains the instance.
     */
    static CallerProvider instance() {
        return INSTANCE;
    }

    /**
     * Obtains the class of the object which calls the method from which this method
     * is being called.
     */
    Class callerClass() {
        Class[] context = getClassContext();
        Class result = context[2];
        return result;
    }

    /**
     * Obtains the class preceding in call chain the class which calls the
     * method from which this method is being called.
     */
    Class previousCallerClass() {
        Class[] context = getClassContext();
        Class result = context[3];
        return result;
    }
}

Improve method names