/*

 * 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.arrays;

import static jdk.nashorn.internal.runtime.ECMAErrors.typeError;

import jdk.nashorn.internal.objects.Global;

import jdk.nashorn.internal.runtime.PropertyDescriptor;

import jdk.nashorn.internal.runtime.ScriptRuntime;

/**

 * ArrayData after the array has been frozen by Object.freeze call.

 */

final class FrozenArrayFilter extends SealedArrayFilter {

    FrozenArrayFilter(final ArrayData underlying) {

        super(underlying);

    }

    @Override

    public ArrayData copy() {

        return this;

    }

    @Override

    public PropertyDescriptor getDescriptor(final Global global, final int index) {

        return global.newDataDescriptor(getObject(index), false, true, false);

    }

    @Override

    public ArrayData set(final int index, final int value, final boolean strict) {

        if (strict) {

            throw typeError("cant.set.property", Integer.toString(index), "frozen array");

        }

        return this;

    }

    @Override

    public ArrayData set(final int index, final double value, final boolean strict) {

        if (strict) {

            throw typeError("cant.set.property", Integer.toString(index), "frozen array");

        }

        return this;

    }

    @Override

    public ArrayData set(final int index, final Object value, final boolean strict) {

        if (strict) {

            throw typeError("cant.set.property", Integer.toString(index), "frozen array");

        }

        return this;

    }

    @Override

    public ArrayData push(final boolean strict, final Object... items) {

        return this; //nop

    }

    @Override

    public Object pop() {

        final int len = (int)underlying.length();

        return len == 0 ? ScriptRuntime.UNDEFINED : underlying.getObject(len - 1);

    }

}