/*

 * 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

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package jdk.nashorn.internal.runtime.arrays;

import java.lang.reflect.Array;

import jdk.nashorn.internal.runtime.ScriptRuntime;

/**

 * Place holding array data for non-array objects.  Activates a true array when

 * accessed.  Should only exist as a singleton defined in ArrayData.

 */

final class NoTypeArrayData extends ArrayData {

    NoTypeArrayData() {

        super(0);

    }

    NoTypeArrayData(final long length) {

         super(length);

    }

    @Override

    public Object[] asObjectArray() {

        return ScriptRuntime.EMPTY_ARRAY;

    }

    @Override

    public ArrayData copy() {

        return new NoTypeArrayData();

    }

    @Override

    public Object asArrayOfType(final Class<?> componentType) {

        return Array.newInstance(componentType, 0);

    }

    @Override

    public ArrayData convert(final Class<?> type) {

        final ArrayData arrayData;

        if (type == Long.class) {

        } else if (type == Double.class) {

        } else if (type == Integer.class) {

        } else {

            assert !type.isPrimitive();

        }

    }

    @Override

    public void shiftLeft(final int by) {

        //empty

    }

    @Override

    public ArrayData shiftRight(final int by) {

        return this;

    }

    @Override

    public ArrayData ensure(final long safeIndex) {

        if (safeIndex >= SparseArrayData.MAX_DENSE_LENGTH) {

            return new SparseArrayData(this, safeIndex + 1);

        }

        // Don't trample the shared EMPTY_ARRAY.

        }

        return this;

    }

    @Override

    public ArrayData shrink(final long newLength) {

        return this;

    }

    @Override

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

        ArrayData newData;

        if (value instanceof Double) {

            newData = convert(Double.class);

        } else if (value instanceof Long) {

            newData = convert(Long.class);

        } else if (value instanceof Integer) {

            newData = convert(Integer.class);

        } else {

            assert !(value instanceof Number);

            newData = convert(value == null ? Object.class : value.getClass());

        }

        return newData.set(index, value, strict);

    }

    @Override

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

        final ArrayData newData = convert(Integer.class);

        return newData.set(index, value, strict);

    }

    @Override

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

        final ArrayData newData = convert(Long.class);

        return newData.set(index, value, strict);

    }

    @Override

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

        final ArrayData newData = convert(Double.class);

        return newData.set(index, value, strict);

    }

    @Override

    public int getInt(final int index) {

        throw new ArrayIndexOutOfBoundsException(index);

    }

    @Override

    public long getLong(final int index) {

        throw new ArrayIndexOutOfBoundsException(index);

    }

    @Override

    public double getDouble(final int index) {

        throw new ArrayIndexOutOfBoundsException(index);

    }

    @Override

    public Object getObject(final int index) {

        throw new ArrayIndexOutOfBoundsException(index);

    }

    @Override

    public boolean has(final int index) {

        return false;

    }

    @Override

    public ArrayData delete(final int index) {

        return new DeletedRangeArrayFilter(this, index, index);

    }

    @Override

    public ArrayData delete(final long fromIndex, final long toIndex) {

        return new DeletedRangeArrayFilter(this, fromIndex, toIndex);

    }

    @Override

    public Object pop() {

        return ScriptRuntime.UNDEFINED;

    }

    @Override

    public ArrayData slice(final long from, final long to) {

        return this;

    }

}