@l5i/dashjs/src/dash/parser/matchers/StringMatcher.js

A reference client implementation for the playback of MPEG DASH via Javascript and compliant browsers.

/**
 * The copyright in this software is being made available under the BSD License,
 * included below. This software may be subject to other third party and contributor
 * rights, including patent rights, and no such rights are granted under this license.
 *
 * Copyright (c) 2013, Dash Industry Forum.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *  * Redistributions of source code must retain the above copyright notice, this
 *  list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright notice,
 *  this list of conditions and the following disclaimer in the documentation and/or
 *  other materials provided with the distribution.
 *  * Neither the name of Dash Industry Forum nor the names of its
 *  contributors may be used to endorse or promote products derived from this software
 *  without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS AS IS AND ANY
 *  EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 *  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 *  IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 *  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 *  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 *  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 *  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 *  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 *  POSSIBILITY OF SUCH DAMAGE.
 */
/**
 * @classdesc Matches and converts xs:string to string, but only for specific attributes on specific nodes
 */
import BaseMatcher from './BaseMatcher';
import DashConstants from '../../constants/DashConstants';

class StringMatcher extends BaseMatcher {
    constructor() {
        super(
            (attr, nodeName) => {
                const stringAttrsInElements = {
                    [DashConstants.MPD]:                            [ DashConstants.ID, DashConstants.PROFILES ],
                    [DashConstants.PERIOD]:                         [ DashConstants.ID ],
                    [DashConstants.BASE_URL]:                       [ DashConstants.SERVICE_LOCATION, DashConstants.BYTE_RANGE ],
                    [DashConstants.SEGMENT_BASE]:                   [ DashConstants.INDEX_RANGE ],
                    [DashConstants.INITIALIZATION]:                 [ DashConstants.RANGE ],
                    [DashConstants.REPRESENTATION_INDEX]:           [ DashConstants.RANGE ],
                    [DashConstants.SEGMENT_LIST]:                   [ DashConstants.INDEX_RANGE ],
                    [DashConstants.BITSTREAM_SWITCHING]:            [ DashConstants.RANGE ],
                    [DashConstants.SEGMENT_URL]:                    [ DashConstants.MEDIA_RANGE, DashConstants.INDEX_RANGE ],
                    [DashConstants.SEGMENT_TEMPLATE]:               [ DashConstants.INDEX_RANGE, DashConstants.MEDIA, DashConstants.INDEX, DashConstants.INITIALIZATION_MINUS, DashConstants.BITSTREAM_SWITCHING_MINUS ],
                    [DashConstants.ASSET_IDENTIFIER]:               [ DashConstants.VALUE, DashConstants.ID ],
                    [DashConstants.EVENT_STREAM]:                   [ DashConstants.VALUE ],
                    [DashConstants.ADAPTATION_SET]:                 [ DashConstants.PROFILES, DashConstants.MIME_TYPE, DashConstants.SEGMENT_PROFILES, DashConstants.CODECS, DashConstants.CONTENT_TYPE ],
                    [DashConstants.FRAME_PACKING]:                  [ DashConstants.VALUE, DashConstants.ID ],
                    [DashConstants.AUDIO_CHANNEL_CONFIGURATION]:    [ DashConstants.VALUE, DashConstants.ID ],
                    [DashConstants.CONTENT_PROTECTION]:             [ DashConstants.VALUE, DashConstants.ID ],
                    [DashConstants.ESSENTIAL_PROPERTY]:             [ DashConstants.VALUE, DashConstants.ID ],
                    [DashConstants.SUPPLEMENTAL_PROPERTY]:          [ DashConstants.VALUE, DashConstants.ID ],
                    [DashConstants.INBAND_EVENT_STREAM]:            [ DashConstants.VALUE, DashConstants.ID ],
                    [DashConstants.ACCESSIBILITY]:                  [ DashConstants.VALUE, DashConstants.ID ],
                    [DashConstants.ROLE]:                           [ DashConstants.VALUE, DashConstants.ID ],
                    [DashConstants.RATING]:                         [ DashConstants.VALUE, DashConstants.ID ],
                    [DashConstants.VIEWPOINT]:                      [ DashConstants.VALUE, DashConstants.ID ],
                    [DashConstants.CONTENT_COMPONENT]:              [ DashConstants.CONTENT_TYPE ],
                    [DashConstants.REPRESENTATION]:                 [ DashConstants.ID, DashConstants.DEPENDENCY_ID, DashConstants.MEDIA_STREAM_STRUCTURE_ID ],
                    [DashConstants.SUBSET]:                         [ DashConstants.ID ],
                    [DashConstants.METRICS]:                        [ DashConstants.METRICS_MINUS ],
                    [DashConstants.REPORTING]:                      [ DashConstants.VALUE, DashConstants.ID ]
                };
                if (stringAttrsInElements.hasOwnProperty(nodeName)) {
                    let attrNames = stringAttrsInElements[nodeName];
                    if (attrNames !== undefined) {
                        return attrNames.indexOf(attr.name) >= 0;
                    } else {
                        return false;
                    }
                }
                return false;
            },
            str => String(str)
        );
    }
}

export default StringMatcher;