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files >> //opt/alt/php81/usr/share/pear/File/MARC/Field.php
<?php /* vim: set expandtab shiftwidth=4 tabstop=4 softtabstop=4 foldmethod=marker: */ /** * Parser for MARC records * * This package is based on the PHP MARC package, originally called "php-marc", * that is part of the Emilda Project (http://www.emilda.org). Christoffer * Landtman generously agreed to make the "php-marc" code available under the * GNU LGPL so it could be used as the basis of this PEAR package. * * PHP version 5 * * LICENSE: This program 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 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 Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA * * @category File_Formats * @package File_MARC * @author Christoffer Landtman <landtman@realnode.com> * @author Dan Scott <dscott@laurentian.ca> * @copyright 2003-2008 Oy Realnode Ab, Dan Scott * @license http://www.gnu.org/copyleft/lesser.html LGPL License 2.1 * @version CVS: $Id$ * @link http://pear.php.net/package/File_MARC */ require_once 'File/MARC/List.php'; // {{{ class File_MARC_Field extends File_MARC_List /** * The File_MARC_Field class is expected to be extended to reflect the * requirements of control and data fields. * * Every MARC field contains a tag name. * * @category File_Formats * @package File_MARC * @author Christoffer Landtman <landtman@realnode.com> * @author Dan Scott <dscott@laurentian.ca> * @license http://www.gnu.org/copyleft/lesser.html LGPL License 2.1 * @link http://pear.php.net/package/File_MARC */ class File_MARC_Field extends File_MARC_List { // {{{ properties /** * The tag name of the Field * @var string */ protected $tag; // }}} // {{{ Constructor: function __construct() /** * File_MARC_Field constructor * * Create a new {@link File_MARC_Field} object from passed arguments. We * define placeholders for the arguments required by child classes. * * @param string $tag tag * @param string $subfields placeholder for subfields or control data * @param string $ind1 placeholder for first indicator * @param string $ind2 placeholder for second indicator */ function __construct($tag, $subfields = null, $ind1 = null, $ind2 = null) { $this->tag = $tag; // Check if valid tag if (!preg_match("/^[0-9A-Za-z]{3}$/", $tag)) { $errorMessage = File_MARC_Exception::formatError(File_MARC_Exception::$messages[File_MARC_Exception::ERROR_INVALID_TAG], array("tag" => $tag)); throw new File_MARC_Exception($errorMessage, File_MARC_Exception::ERROR_INVALID_TAG); } } // }}} // {{{ Destructor: function __destruct() /** * Destroys the data field */ function __destruct() { $this->tag = null; } // }}} // {{{ getTag() /** * Returns the tag for this {@link File_MARC_Field} object * * @return string returns the tag number of the field */ function getTag() { return (string)$this->tag; } // }}} // {{{ setTag() /** * Sets the tag for this {@link File_MARC_Field} object * * @param string $tag new value for the tag * * @return string returns the tag number of the field */ function setTag($tag) { $this->tag = $tag; return $this->getTag(); } // }}} // {{{ isEmpty() /** * Is empty * * Checks if the field is empty. * * @return bool Returns true if the field is empty, otherwise false */ function isEmpty() { if ($this->getTag()) { return false; } // It is empty return true; } // }}} // {{{ isControlField() /** * Is control field * * Checks if the field is a control field. * * @return bool Returns true if the field is a control field, otherwise false */ function isControlField() { if (get_class($this) == 'File_MARC_Control_Field') { return true; } return false; } // }}} // {{{ isDataField() /** * Is data field * * Checks if the field is a data field. * * @return bool Returns true if the field is a data field, otherwise false */ function isDataField() { if (get_class($this) == 'File_MARC_Data_Field') { return true; } return false; } // }}} /** * ========== OUTPUT METHODS ========== */ // {{{ __toString() /** * Return Field formatted * * Return Field as a formatted string. * * @return string Formatted output of Field */ function __toString() { return (string)$this->getTag(); } // }}} // {{{ toRaw() /** * Return field in raw MARC format (stub) * * Return the field formatted in raw MARC for saving into MARC files. This * stub method is extended by the child classes. * * @return bool Raw MARC */ function toRaw() { return false; } // }}} // {{{ formatField() /** * Pretty print a MARC_Field object without tags, indicators, etc. * * @param array $exclude Subfields to exclude from formatted output * * @return string Returns the formatted field data */ function formatField($exclude = array('2')) { if ($this->isControlField()) { return $this->getData(); } else { $out = ''; foreach ($this->getSubfields() as $subfield) { if (substr($this->getTag(), 0, 1) == '6' and (in_array($subfield->getCode(), array('v','x','y','z')))) { $out .= ' -- ' . $subfield->getData(); } elseif (!in_array($subfield->getCode(), $exclude)) { $out .= ' ' . $subfield->getData(); } } return trim($out); } } // }}} } // }}}
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