/*

 * Copyright (c) 2009, 2019, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 *

 */

package shared;

import java.lang.reflect.InvocationTargetException;

/*******************************************************************/

// Invoke different target method callers

/*******************************************************************/

public class Caller {

    private ClassLoader loader;

    private Class paramClass;

    private Class targetClass;

    private boolean passed = true;

    private Checker checker;

    public Caller(ClassLoader loader, Checker checker,

                  Class paramClass, Class targetClass) {

        this.loader = loader;

        this.paramClass = paramClass;

        this.targetClass = targetClass;

        this.checker = checker;

    }

    public boolean isPassed() {

        return passed;

    }

    public String call(String invoker) {

        try {

            Class clazz = loader.loadClass(invoker);

            String expectedBehavior = checker.check(clazz);

            String result = null;

            Throwable exc = null;

            try {

                java.lang.reflect.Method m = clazz.getDeclaredMethod("call", paramClass);

                result = (String) m.invoke(null, targetClass.newInstance());

            } catch (InvocationTargetException e) {

                exc = e.getCause();

            } catch (Throwable e) {

                exc = e;

            }

            if (result == null) {

                if (exc != null) {

                    result = exc.getClass().getName();

                } else {

                    result = "null";

                }

            }

            if (!(result.equals(expectedBehavior) || "".equals(expectedBehavior)) ) {

                passed = false;

                result = String.format("%s/%s", result, expectedBehavior);

            }

            return Checker.abbreviateResult(result);

        } catch (Exception e) {

            throw new RuntimeException(e);

        }

    }

}