src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/objects/BoundScriptFunctionImpl.java

/*
 * 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.
 *
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package jdk.nashorn.internal.objects;

import jdk.nashorn.internal.runtime.ScriptFunction;
import jdk.nashorn.internal.runtime.ScriptFunctionData;
import jdk.nashorn.internal.runtime.ScriptObject;
import jdk.nashorn.internal.runtime.ScriptRuntime;

/**
 * A {@code ScriptFunctionImpl} subclass for functions created using {@code Function.prototype.bind}. Such functions
 * must track their {@code [[TargetFunction]]} property for purposes of correctly implementing {@code [[HasInstance]]};
 * see {@link ScriptFunction#isInstance(ScriptObject)}.
 */
final class BoundScriptFunctionImpl extends ScriptFunctionImpl {
    private final ScriptFunction targetFunction;

    BoundScriptFunctionImpl(final ScriptFunctionData data, final ScriptFunction targetFunction) {
        super(data, Global.instance());
        setPrototype(ScriptRuntime.UNDEFINED);
        this.targetFunction = targetFunction;
    }

    @Override
    protected ScriptFunction getTargetFunction() {
        return targetFunction;
    }
}