/*

 * Copyright (c) 2018, 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 org.graalvm.compiler.core.test;

import org.objectweb.asm.Opcodes;

public abstract class CustomizedBytecodePatternTest extends GraalCompilerTest implements Opcodes {

    protected Class<?> getClass(String className) throws ClassNotFoundException {

        return new CachedLoader(CustomizedBytecodePatternTest.class.getClassLoader(), className).findClass(className);

    }

    private class CachedLoader extends ClassLoader {

        final String className;

        Class<?> loaded;

        CachedLoader(ClassLoader parent, String className) {

            super(parent);

            this.className = className;

        }

        @Override

        protected Class<?> findClass(String name) throws ClassNotFoundException {

            if (name.equals(className)) {

                if (loaded == null) {

                    byte[] gen = generateClass(name.replace('.', '/'));

                    loaded = defineClass(name, gen, 0, gen.length);

                }

                return loaded;

            } else {

                return super.findClass(name);

            }

        }

    }

    protected abstract byte[] generateClass(String internalClassName);

}