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 * Copyright (c) 2010, 2013, 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 jdk.nashorn.internal.runtime;

import jdk.nashorn.internal.codegen.ClassEmitter;

/**
 * Interface for installing classes passed to the compiler.
 * As only the code generating package (i.e. Context) knows about
 * the ScriptLoader and it would be a security hazard otherwise
 * the Compiler is given an installation interface for its code.
 * <p>
 * The compiler still retains most of the state around code emission
 * and management internally, so this is to avoid passing around any
 * logic that isn't directly related to installing a class
 * @param <T> owner class type for this code installer
 *
 */
public interface CodeInstaller<T> {
    /**
     * Return the owner for the CodeInstaller, e.g. a {@link Context}
     * @return owner
     */
    public T getOwner();

    /**
     * Install a class
     * @param className name of the class with / separation
     * @param bytecode  bytecode
     * @return the installed class
     */
    public Class<?> install(final String className, final byte[] bytecode);

    /**
     * Verify generated bytecode before emission. This is called back from the
     * {@link ClassEmitter} or the {@link Compiler}. If the "--verify-code" parameter
     * hasn't been given, this is a nop
     *
     * @param code bytecode to verify
     */
    public void verify(final byte[] code);

    /**
     * Get next unique script id
     * @return unique script id
     */
    public long getUniqueScriptId();

    /**
     * Get next unique eval id
     * @return unique eval id
     */
    public long getUniqueEvalId();
}