@oat-sa/tao-item-runner-qti
Version:
TAO QTI Item Runner modules
64 lines (54 loc) • 1.96 kB
JavaScript
/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; under version 2
* of the License (non-upgradable).
*
* This program 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Copyright (c) 2015-2019 (original work) Open Assessment Technlogies SA (under the project TAO-PRODUCT);
*
*/
/**
* The isNull operator processor.
* @see http://www.imsglobal.org/question/qtiv2p1/imsqti_infov2p1.html#element10616
*
* @author Bertrand Chevrier <bertrand@taotesting.com>
*/
/**
* Process operands and returns a boolean of the isNull.
* @type {OperatorProcesssor}
* @exports taoQtiItem/scoring/processor/expressions/operators/isNull
*/
var isNullProcessor = {
constraints: {
minOperand: 1,
maxOperand: 1,
cardinality: ['single', 'multiple', 'ordered', 'record'],
baseType: ['identifier', 'boolean', 'integer', 'float', 'string', 'point', 'pair', 'directedPair', 'duration', 'file', 'uri', 'intOrIdentifier']
},
operands: [],
/**
* Check if the unique operand is null.
* @returns {?ProcessingValue} a single boolean
*/
process: function() {
var result = {
cardinality: 'single',
baseType: 'boolean',
value: false
};
if (this.operands[0] === null || this.operands[0].value === null) {
result.value = true;
}
return result;
}
};
export default isNullProcessor;