/*
 * Copyright (c) 2014, 2017, 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.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * 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
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 */

package org.openjdk.jol.util;

import java.net.URL;
import java.net.URLClassLoader;
import java.util.HashMap;
import java.util.Map;

public class ByteClassLoader extends URLClassLoader {
    private final Map<String, byte[]> customClasses;

    public ByteClassLoader() {
        super(new URL[] {});
        customClasses = new HashMap<>();
    }

    @Override
    public Class<?> findClass(final String name) throws ClassNotFoundException {
        if (customClasses.containsKey(name)) {
            byte[] bs = customClasses.get(name);
            return defineClass(name, bs, 0, bs.length);
        }
        return super.findClass(name);
    }

    public void put(String name, byte[] bytes) {
        customClasses.put(name, bytes);
    }
}
