130 lines
3 KiB
PHP
130 lines
3 KiB
PHP
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<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_Pdf
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* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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* @version $Id: Trailer.php 16541 2009-07-07 06:59:03Z bkarwin $
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*/
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/** Zend_Pdf_Element_Dictionary */
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require_once 'Zend/Pdf/Element/Dictionary.php';
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/**
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* PDF file trailer
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*
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* @package Zend_Pdf
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* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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abstract class Zend_Pdf_Trailer
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{
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private static $_allowedKeys = array('Size', 'Prev', 'Root', 'Encrypt', 'Info', 'ID', 'Index', 'W', 'XRefStm', 'DocChecksum');
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/**
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* Trailer dictionary.
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*
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* @var Zend_Pdf_Element_Dictionary
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*/
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private $_dict;
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/**
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* Check if key is correct
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*
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* @param string $key
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* @throws Zend_Pdf_Exception
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*/
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private function _checkDictKey($key)
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{
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if ( !in_array($key, self::$_allowedKeys) ) {
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/** @todo Make warning (log entry) instead of an exception */
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throw new Zend_Pdf_Exception("Unknown trailer dictionary key: '$key'.");
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}
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}
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/**
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* Object constructor
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*
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* @param Zend_Pdf_Element_Dictionary $dict
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*/
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public function __construct(Zend_Pdf_Element_Dictionary $dict)
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{
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$this->_dict = $dict;
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foreach ($this->_dict->getKeys() as $dictKey) {
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$this->_checkDictKey($dictKey);
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}
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}
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/**
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* Get handler
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*
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* @param string $property
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* @return mixed
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*/
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public function __get($property)
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{
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return $this->_dict->$property;
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}
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/**
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* Set handler
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*
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* @param string $property
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* @param mixed $value
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*/
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public function __set($property, $value)
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{
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$this->_checkDictKey($property);
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$this->_dict->$property = $value;
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}
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/**
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* Return string trailer representation
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*
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* @return string
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*/
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public function toString()
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{
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return "trailer\n" . $this->_dict->toString() . "\n";
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}
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/**
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* Get length of source PDF
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*
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* @return string
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*/
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abstract public function getPDFLength();
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/**
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* Get PDF String
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*
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* @return string
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*/
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abstract public function getPDFString();
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/**
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* Get header of free objects list
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* Returns object number of last free object
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*
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* @return integer
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*/
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abstract public function getLastFreeObject();
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}
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