/*

 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.

 */

/*

 * Licensed to the Apache Software Foundation (ASF) under one or more

 * contributor license agreements.  See the NOTICE file distributed with

 * this work for additional information regarding copyright ownership.

 * The ASF licenses this file to You under the Apache License, Version 2.0

 * (the "License"); you may not use this file except in compliance with

 * the License.  You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.sun.org.apache.xerces.internal.impl.dv.util;

import com.sun.org.apache.xerces.internal.xs.XSException;

import com.sun.org.apache.xerces.internal.xs.datatypes.ByteList;

import java.util.AbstractList;

/**

 * Implementation of <code>com.sun.org.apache.xerces.internal.xs.datatypes.ByteList</code>.

 *

 * @xerces.internal

 *

 * @author Ankit Pasricha, IBM

 *

 * @LastModified: Oct 2017

 */

public class ByteListImpl extends AbstractList<Byte> implements ByteList {

    // actually data stored in a byte array

    protected final byte[] data;

    // canonical representation of the data

    protected String canonical;

    public ByteListImpl(byte[] data) {

        this.data = data;

    }

    /**

     * The number of <code>byte</code>s in the list. The range of

     * valid child object indices is 0 to <code>length-1</code> inclusive.

     */

    public int getLength() {

        return data.length;

    }

    /**

     * Checks if the <code>byte</code> <code>item</code> is a

     * member of this list.

     * @param item  <code>byte</code> whose presence in this list

     *   is to be tested.

     * @return  True if this list contains the <code>byte</code>

     *   <code>item</code>.

     */

    public boolean contains(byte item) {

        for (int i = 0; i < data.length; ++i) {

            if (data[i] == item) {

                return true;

            }

        }

        return false;

    }

    /**

     * Returns the <code>index</code>th item in the collection. The index

     * starts at 0.

     * @param index  index into the collection.

     * @return  The <code>byte</code> at the <code>index</code>th

     *   position in the <code>ByteList</code>.

     * @exception XSException

     *   INDEX_SIZE_ERR: if <code>index</code> is greater than or equal to the

     *   number of objects in the list.

     */

    public byte item(int index)

        throws XSException {

        if(index < 0 || index > data.length - 1) {

            throw new XSException(XSException.INDEX_SIZE_ERR, null);

        }

        return data[index];

    }

    /*

     * List methods

     */

    public Byte get(int index) {

        if (index >= 0 && index < data.length) {

            return data[index];

        }

        throw new IndexOutOfBoundsException("Index: " + index);

    }

    public int size() {

        return getLength();

    }

    public byte[] toByteArray() {

        byte[] ret = new byte[data.length];

        System.arraycopy(data, 0, ret, 0, data.length);

        return ret;

    }

}