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Truffle is a multi-language framework for executing dynamic languages that achieves high performance when combined with Graal.

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/*
 * Copyright (c) 2016, 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
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
package com.oracle.truffle.api.interop.java;

import com.oracle.truffle.api.interop.ForeignAccess;
import com.oracle.truffle.api.interop.TruffleObject;

final class JavaObject implements TruffleObject {

    static final JavaObject NULL = new JavaObject(null, Object.class);

    final Object obj;
    final Class clazz;

    JavaObject(Object obj, Class clazz) {
        this.obj = obj;
        this.clazz = clazz;
    }

    @Override
    public ForeignAccess getForeignAccess() {
        return JavaObjectMessageResolutionForeign.createAccess();
    }

    @Override
    public int hashCode() {
        return System.identityHashCode(obj);
    }

    public static boolean isInstance(TruffleObject obj) {
        return obj instanceof JavaObject;
    }

    public boolean isClass() {
        return obj == null;
    }

    @Override
    public boolean equals(Object other) {
        if (other instanceof JavaObject) {
            return obj == ((JavaObject) other).obj && clazz == ((JavaObject) other).clazz;
        }
        return false;
    }
}