001    /*
002     * Copyright (c) 2000 World Wide Web Consortium,
003     * (Massachusetts Institute of Technology, Institut National de
004     * Recherche en Informatique et en Automatique, Keio University). All
005     * Rights Reserved. This program is distributed under the W3C's Software
006     * Intellectual Property License. This program is distributed in the
007     * hope that it will be useful, but WITHOUT ANY WARRANTY; without even
008     * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
009     * PURPOSE.
010     * See W3C License http://www.w3.org/Consortium/Legal/ for more details.
011     */
012    
013    package org.w3c.dom.stylesheets;
014    
015    /**
016     * The <code>StyleSheetList</code> interface provides the abstraction of an
017     * ordered collection of style sheets.
018     * <p> The items in the <code>StyleSheetList</code> are accessible via an
019     * integral index, starting from 0.
020     * <p>See also the <a href='http://www.w3.org/TR/2000/REC-DOM-Level-2-Style-20001113'>Document Object Model (DOM) Level 2 Style Specification</a>.
021     * @since DOM Level 2
022     */
023    public interface StyleSheetList {
024        /**
025         *  The number of <code>StyleSheets</code> in the list. The range of valid
026         * child stylesheet indices is <code>0</code> to <code>length-1</code>
027         * inclusive.
028         */
029        public int getLength();
030    
031        /**
032         *  Used to retrieve a style sheet by ordinal index. If index is greater
033         * than or equal to the number of style sheets in the list, this returns
034         * <code>null</code>.
035         * @param index Index into the collection
036         * @return The style sheet at the <code>index</code> position in the
037         *   <code>StyleSheetList</code>, or <code>null</code> if that is not a
038         *   valid index.
039         */
040        public StyleSheet item(int index);
041    
042    }