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Java example source code file (ByteListImpl.java)

This example Java source code file (ByteListImpl.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

abstractlist, bytelistimpl, index, indexoutofboundsexception, object, string, util, xsexception

The ByteListImpl.java Java example source code

/*
 * reserved comment block
 * DO NOT REMOVE OR ALTER!
 */
/*
 * Copyright 2004 The Apache Software Foundation.
 *
 * Licensed 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 java.util.AbstractList;

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

/**
 * Implementation of <code>com.sun.org.apache.xerces.internal.xs.datatypes.ByteList.
 *
 * @xerces.internal
 *
 * @author Ankit Pasricha, IBM
 *
 * @version $Id: ByteListImpl.java,v 1.7 2010-11-01 04:39:46 joehw Exp $
 */
public class ByteListImpl extends AbstractList 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>bytes in the list. The range of
     * valid child object indices is 0 to <code>length-1 inclusive.
     */
    public int getLength() {
        return data.length;
    }

    /**
     * Checks if the <code>byte item is a
     * member of this list.
     * @param item  <code>byte whose presence in this list
     *   is to be tested.
     * @return  True if this list contains the <code>byte
     *   <code>item.
     */
    public boolean contains(byte item) {
        for (int i = 0; i < data.length; ++i) {
            if (data[i] == item) {
                return true;
            }
        }
        return false;
    }

    /**
     * Returns the <code>indexth item in the collection. The index
     * starts at 0.
     * @param index  index into the collection.
     * @return  The <code>byte at the indexth
     *   position in the <code>ByteList.
     * @exception XSException
     *   INDEX_SIZE_ERR: if <code>index 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 Object get(int index) {
        if (index >= 0 && index < data.length) {
            return new Byte(data[index]);
        }
        throw new IndexOutOfBoundsException("Index: " + index);
    }

    public int size() {
        return getLength();
    }
}

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