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View File Name : PrimitiveTypeDescription.inc.php

<?php
/**
 * @file classes/filter/PrimitiveTypeDescription.inc.php
 *
 * Copyright (c) 2014-2021 Simon Fraser University
 * Copyright (c) 2000-2021 John Willinsky
 * Distributed under the GNU GPL v3. For full terms see the file docs/COPYING.
 *
 * @class PrimitiveTypeDescription
 * @ingroup filter
 *
 * @brief Class that describes a primitive input/output type.
 */

import('lib.pkp.classes.filter.TypeDescription');
import('lib.pkp.classes.filter.TypeDescriptionFactory');

class PrimitiveTypeDescription extends TypeDescription {
	/** @var string a PHP primitive type, e.g. 'string' */
	var $_primitiveType;

	/**
	 * Constructor
	 *
	 * @param $typeName string Allowed primitive types are
	 *  'integer', 'string', 'float' and 'boolean'.
	 */
	function __construct($typeName) {
		parent::__construct($typeName);
	}


	//
	// Setters and Getters
	//
	/**
	 * @see TypeDescription::getNamespace()
	 */
	function getNamespace() {
		return TYPE_DESCRIPTION_NAMESPACE_PRIMITIVE;
	}


	//
	// Implement abstract template methods from TypeDescription
	//
	/**
	 * @see TypeDescription::parseTypeName()
	 */
	function parseTypeName($typeName) {
		// This should be a primitive type
		if (!in_array($typeName, $this->_supportedPrimitiveTypes())) return false;

		$this->_primitiveType = $typeName;
		return true;
	}

	/**
	 * @see TypeDescription::checkType()
	 */
	function checkType(&$object) {
		// We expect a primitive type
		if (!is_scalar($object)) return false;

		// Check the type
		if ($this->_getPrimitiveTypeName($object) != $this->_primitiveType) return false;

		return true;
	}


	//
	// Private helper methods
	//
	/**
	 * Return a string representation of a primitive type.
	 * @param $variable mixed
	 */
	function _getPrimitiveTypeName(&$variable) {
		assert(!(is_object($variable) || is_array($variable) || is_null($variable)));

		// FIXME: When gettype's implementation changes as mentioned
		// in <http://www.php.net/manual/en/function.gettype.php> then
		// we have to manually re-implement this method.
		return str_replace('double', 'float', gettype($variable));
	}

	/**
	 * Returns a (static) array with supported
	 * primitive type names.
	 *
	 */
	static function _supportedPrimitiveTypes() {
		static $supportedPrimitiveTypes = array(
			'string', 'integer', 'float', 'boolean'
		);
		return $supportedPrimitiveTypes;
	}
}