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当前路径:Classes/PHPExcel/Calculation/Database.php
<?php

/** PHPExcel root directory */
if (!defined('PHPEXCEL_ROOT')) {
    /**
     * @ignore
     */
    define('PHPEXCEL_ROOT', dirname(__FILE__) . '/../../');
    require(PHPEXCEL_ROOT . 'PHPExcel/Autoloader.php');
}

/**
 * PHPExcel_Calculation_Database
 *
 * Copyright (c) 2006 - 2015 PHPExcel
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 *
 * @category    PHPExcel
 * @package        PHPExcel_Calculation
 * @copyright    Copyright (c) 2006 - 2015 PHPExcel (http://www.codeplex.com/PHPExcel)
 * @license        http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt    LGPL
 * @version        ##VERSION##, ##DATE##
 */
class PHPExcel_Calculation_Database
{
    /**
     * fieldExtract
     *
     * Extracts the column ID to use for the data field.
     *
     * @access    private
     * @param    mixed[]        $database        The range of cells that makes up the list or database.
     *                                        A database is a list of related data in which rows of related
     *                                        information are records, and columns of data are fields. The
     *                                        first row of the list contains labels for each column.
     * @param    mixed        $field            Indicates which column is used in the function. Enter the
     *                                        column label enclosed between double quotation marks, such as
     *                                        "Age" or "Yield," or a number (without quotation marks) that
     *                                        represents the position of the column within the list: 1 for
     *                                        the first column, 2 for the second column, and so on.
     * @return    string|NULL
     *
     */
    private static function fieldExtract($database, $field)
    {
        $field = strtoupper(PHPExcel_Calculation_Functions::flattenSingleValue($field));
        $fieldNames = array_map('strtoupper', array_shift($database));

        if (is_numeric($field)) {
            $keys = array_keys($fieldNames);
            return $keys[$field-1];
        }
        $key = array_search($field, $fieldNames);
        return ($key) ? $key : null;
    }

    /**
     * filter
     *
     * Parses the selection criteria, extracts the database rows that match those criteria, and
     * returns that subset of rows.
     *
     * @access    private
     * @param    mixed[]        $database        The range of cells that makes up the list or database.
     *                                        A database is a list of related data in which rows of related
     *                                        information are records, and columns of data are fields. The
     *                                        first row of the list contains labels for each column.
     * @param    mixed[]        $criteria        The range of cells that contains the conditions you specify.
     *                                        You can use any range for the criteria argument, as long as it
     *                                        includes at least one column label and at least one cell below
     *                                        the column label in which you specify a condition for the
     *                                        column.
     * @return    array of mixed
     *
     */
    private static function filter($database, $criteria)
    {
        $fieldNames = array_shift($database);
        $criteriaNames = array_shift($criteria);

        //    Convert the criteria into a set of AND/OR conditions with [:placeholders]
        $testConditions = $testValues = array();
        $testConditionsCount = 0;
        foreach ($criteriaNames as $key => $criteriaName) {
            $testCondition = array();
            $testConditionCount = 0;
            foreach ($criteria as $row => $criterion) {
                if ($criterion[$key] > '') {
                    $testCondition[] = '[:'.$criteriaName.']'.PHPExcel_Calculation_Functions::ifCondition($criterion[$key]);
                    $testConditionCount++;
                }
            }
            if ($testConditionCount > 1) {
                $testConditions[] = 'OR(' . implode(',', $testCondition) . ')';
                $testConditionsCount++;
            } elseif ($testConditionCount == 1) {
                $testConditions[] = $testCondition[0];
                $testConditionsCount++;
            }
        }

        if ($testConditionsCount > 1) {
            $testConditionSet = 'AND(' . implode(',', $testConditions) . ')';
        } elseif ($testConditionsCount == 1) {
            $testConditionSet = $testConditions[0];
        }

        //    Loop through each row of the database
        foreach ($database as $dataRow => $dataValues) {
            //    Substitute actual values from the database row for our [:placeholders]
            $testConditionList = $testConditionSet;
            foreach ($criteriaNames as $key => $criteriaName) {
                $k = array_search($criteriaName, $fieldNames);
                if (isset($dataValues[$k])) {
                    $dataValue = $dataValues[$k];
                    $dataValue = (is_string($dataValue)) ? PHPExcel_Calculation::wrapResult(strtoupper($dataValue)) : $dataValue;
                    $testConditionList = str_replace('[:' . $criteriaName . ']', $dataValue, $testConditionList);
                }
            }
            //    evaluate the criteria against the row data
            $result = PHPExcel_Calculation::getInstance()->_calculateFormulaValue('='.$testConditionList);
            //    If the row failed to meet the criteria, remove it from the database
            if (!$result) {
                unset($database[$dataRow]);
            }
        }

        return $database;
    }


    private static function getFilteredColumn($database, $field, $criteria)
    {
        //    reduce the database to a set of rows t...
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