/*

 * 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.lookup.Lookup.MH;

import java.lang.invoke.MethodHandle;

import java.nio.Buffer;

import jdk.internal.dynalink.CallSiteDescriptor;

import jdk.internal.dynalink.linker.GuardedInvocation;

import jdk.internal.dynalink.linker.LinkRequest;

import jdk.nashorn.internal.lookup.Lookup;

/**

 * The superclass of all ArrayData used by TypedArrays

 *

 * @param <T> buffer implementation

 */

public abstract class TypedArrayData<T extends Buffer> extends ContinuousArrayData {

    /** wrapped native buffer */

    protected final T nb;

    /**

     * Constructor

     * @param nb wrapped native buffer

     * @param elementLength length in elements

     */

    protected TypedArrayData(final T nb, final int elementLength) {

        super(elementLength); //TODO is this right?

        this.nb = nb;

    }

    /**

     * @return element length

     */

    public final int getElementLength() {

    }

    /**

     * Is this an unsigned array data?

     * @return true if unsigned

     */

    public boolean isUnsigned() {

        return false;

    }

    /**

     * Is this a clamped array data?

     * @return true if clamped

     */

    public boolean isClamped() {

        return false;

    }

    @Override

    public boolean canDelete(final int index, final boolean strict) {

        return false;

    }

    @Override

    public boolean canDelete(final long fromIndex, final long toIndex, final boolean strict) {

        return false;

    }

    @Override

    public ArrayData copy() {

        throw new UnsupportedOperationException();

    }

    @Override

    public Object[] asObjectArray() {

        throw new UnsupportedOperationException();

    }

    @Override

    public void shiftLeft(final int by) {

        throw new UnsupportedOperationException();

    }

    @Override

    public ArrayData shiftRight(final int by) {

        throw new UnsupportedOperationException();

    }

    @Override

    public ArrayData ensure(final long safeIndex) {

        return this;

    }

    @Override

    public ArrayData shrink(final long newLength) {

        throw new UnsupportedOperationException();

    }

    @Override

    public final boolean has(final int index) {

    }

    @Override

    public ArrayData delete(final int index) {

        return this;

    }

    @Override

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

        return this;

    }

    @Override

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

        throw new UnsupportedOperationException();

    }

    @Override

    public Object pop() {

        throw new UnsupportedOperationException();

    }

    @Override

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

        throw new UnsupportedOperationException();

    }

    /**

     * Element getter method handle

     * @return getter

     */

    protected abstract MethodHandle getGetElem();

    /**

     * Element setter method handle

     * @return setter

     */

    protected abstract MethodHandle getSetElem();

    @Override

    public MethodHandle getElementGetter(final Class<?> returnType, final int programPoint) {

        final MethodHandle getter = getContinuousElementGetter(getClass(), getGetElem(), returnType, programPoint);

        if (getter != null) {

            return Lookup.filterReturnType(getter, returnType);

        }

        return getter;

    }

    @Override

    public MethodHandle getElementSetter(final Class<?> elementType) {

        return getContinuousElementSetter(getClass(), Lookup.filterArgumentType(getSetElem(), 2, elementType), elementType);

    }

    @Override

    protected MethodHandle getContinuousElementSetter(final Class<? extends ContinuousArrayData> clazz, final MethodHandle setHas, final Class<?> elementType) {

        final MethodHandle mh = Lookup.filterArgumentType(setHas, 2, elementType);

        return MH.asType(mh, mh.type().changeParameterType(0, clazz));

    }

    @Override

    public GuardedInvocation findFastGetIndexMethod(final Class<? extends ArrayData> clazz, final CallSiteDescriptor desc, final LinkRequest request) {

        final GuardedInvocation inv = super.findFastGetIndexMethod(clazz, desc, request);

        if (inv != null) {

            return inv;

        }

        return null;

    }

    @Override

    public GuardedInvocation findFastSetIndexMethod(final Class<? extends ArrayData> clazz, final CallSiteDescriptor desc, final LinkRequest request) { // array, index, value

        final GuardedInvocation inv = super.findFastSetIndexMethod(clazz, desc, request);

        if (inv != null) {

            return inv;

        }

        return null;

    }

}