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<?php /** * File containing the ezcGraphDatabaseDataSet class * * @package GraphDatabaseTiein * @version 1.0.1 * @copyright Copyright (C) 2005-2008 eZ systems as. All rights reserved. * @license http://ez.no/licenses/new_bsd New BSD License / /* * Class to transform PDO results into ezcGraphDataSets * * @package GraphDatabaseTiein * @version 1.0.1 * @mainclass / class ezcGraphDatabaseDataSet extends ezcGraphDataSet { /* * Constructor * * Creates a ezcGraphDatabase from a PDOStatement and uses the columns * defined in the definition array as keys and values for the data set. * * If the definition array is empty a single column will be used as values, * with two columns the first column will be used for the keys and the * second for the data set values. * * You may define the name of the rows used for keys and values by using * an array like: * array ( * ezcGraph::KEY => 'row name', * ezcGraph::VALUE => 'row name', * ); * * PDO by default lowercases all column names, see PDO::setAttribute() for * details. If the column names you pass to the dataset definition array * are not lowercase, you either need to change the PDO::ATTR_CASE * attribute of your PDO connection instance, or lowercase the names passed * to the definition array. Otherwise this will throw * ezcGraphDatabaseMissingColumnException exceptions. * * @param PDOStatement $statement * @param array $definition * @return ezcGraphDatabase / public function __construct( PDOStatement $statement, ?array $definition = null ) { parent::__construct(); $this->data = array(); $this->createFromPdo( $statement, $definition ); } /* * Create dataset from PDO statement * * This methods uses the values from a PDOStatement to fill up the data * sets data. * * If the definition array is empty a single column will be used as values, * with two columns the first column will be used for the keys and the * second for the data set values. * * You may define the name of the rows used for keys and values by using * an array like: * array ( * ezcGraph::KEY => 'row name', * ezcGraph::VALUE => 'row name', * ); * * @param PDOStatement $statement * @param array $definition * @return void / protected function createFromPdo( PDOStatement $statement, ?array $definition = null ) { if ( $definition === null ) { $this->fetchNumeric( $statement ); } else { $this->fetchByDefinition( $statement, $definition ); } // Empty result set if ( count( $this->data ) <= 0 ) { throw new ezcGraphDatabaseStatementNotExecutedException( $statement ); } } /* * Fetch numeric * * If there is only one column returned by the query use the column as * values for the dataset. If there are two columns returned use the first * as key and the second as values for teh dataset. * * If there are more or less columns returned, a * ezcGraphDatabaseTooManyColumnsException is thrown. * * @param PDOStatement $statement * @return void / protected function fetchNumeric( PDOStatement $statement ) { while ( $row = $statement->fetch( PDO::FETCH_NUM ) ) { switch ( count( $row ) ) { case 1: $this->data[] = $row[0]; break; case 2: $this->data[$row[0]] = $row[1]; break; default: throw new ezcGraphDatabaseTooManyColumnsException( $row ); } } } /* * Fecth data by provided definition * * Use the provided definition with column names to fetch specific columns * as key and values. Will throw a ezcGraphDatabaseMissingColumnException, * if the column does not exist in the query result. * * @param PDOStatement $statement * @param array $definition * @return void / protected function fetchByDefinition( PDOStatement $statement, array $definition ) { while ( $row = $statement->fetch( PDO::FETCH_NAMED ) ) { if ( !array_key_exists( $definition[ezcGraph::VALUE], $row ) ) { throw new ezcGraphDatabaseMissingColumnException( $definition[ezcGraph::VALUE] ); } $value = $row[$definition[ezcGraph::VALUE]]; if ( array_key_exists( ezcGraph::KEY, $definition ) ) { if ( !array_key_exists( $definition[ezcGraph::KEY], $row ) ) { throw new ezcGraphDatabaseMissingColumnException( $definition[ezcGraph::KEY] ); } $this->data[$row[$definition[ezcGraph::KEY]]] = $value; } else { $this->data[] = $value; } } } /* * Returns the number of elements in this dataset * * @return int */ public function count() { return count( $this->data ); } } ?>

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