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<?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 Dan Scott <dscott@laurentian.ca>
* @copyright 2007-2010 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
* @example read.php Retrieve specific fields and subfields from a record
* @example subfields.php Create new subfields and add them in specific order
* @example marc_yaz.php Pretty print a MARC record retrieved through the PECL yaz extension
*/
require_once 'PEAR/Exception.php';
require_once 'Structures/LinkedList/Double.php';
require_once 'File/MARCBASE.php';
require_once 'File/MARC.php';
require_once 'File/MARC/Record.php';
require_once 'File/MARC/Field.php';
require_once 'File/MARC/Control_Field.php';
require_once 'File/MARC/Data_Field.php';
require_once 'File/MARC/Subfield.php';
require_once 'File/MARC/Exception.php';
require_once 'File/MARC/List.php';
// {{{ class File_MARCXML
/**
* The main File_MARCXML class enables you to return File_MARC_Record
* objects from an XML stream or string.
*
* @category File_Formats
* @package File_MARC
* @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_MARCXML extends File_MARCBASE
{
// {{{ constants
/**
* MARC records retrieved from a file
*/
const SOURCE_FILE = 1;
/**
* MARC records retrieved from a binary string
*/
const SOURCE_STRING = 2;
// }}}
// {{{ properties
/**
* Source containing raw records
*
* @var resource
*/
protected $source;
/**
* Source type (SOURCE_FILE or SOURCE_STRING)
*
* @var int
*/
protected $type;
/**
* Counter for MARCXML records in a collection
*
* @var int
*/
protected $counter;
/**
* XMLWriter for writing collections
*
* @var XMLWriter
*/
protected $xmlwriter;
// }}}
// {{{ Constructor: function __construct()
/**
* Read in MARCXML records
*
* This function reads in files or strings that
* contain one or more MARCXML records.
*
* <code>
* <?php
* // Retrieve MARC records from a file
* $journals = new File_MARC('journals.mrc', SOURCE_FILE);
*
* // Retrieve MARC records from a string (e.g. Z39 query results)
* $monographs = new File_MARC($raw_marc, SOURCE_STRING);
* ?>
* </code>
*
* @param string $source Name of the file, or a raw MARC string
* @param int $type Source of the input, either SOURCE_FILE or SOURCE_STRING
*/
function __construct($source, $type = self::SOURCE_FILE)
{
parent::__construct($source, $type);
$this->counter = 0;
switch ($type) {
case self::SOURCE_FILE:
$this->type = self::SOURCE_FILE;
$this->source = simplexml_load_file($source);
break;
case self::SOURCE_STRING:
$this->type = self::SOURCE_STRING;
$this->source = simplexml_load_string($source);
break;
default:
throw new File_MARC_Exception(File_MARC_Exception::$messages[File_MARC_Exception::ERROR_INVALID_SOURCE], File_MARC_Exception::ERROR_INVALID_SOURCE);
}
if (!$this->source) {
$errorMessage = File_MARC_Exception::formatError(File_MARC_Exception::$messages[File_MARC_Exception::ERROR_INVALID_FILE], array('filename' => $source));
throw new File_MARC_Exception($errorMessage, File_MARC_Exception::ERROR_INVALID_FILE);
}
}
// }}}
// {{{ next()
/**
* Return next {@link File_MARC_Record} object
*
* Decodes the next MARCXML record and returns the {@link File_MARC_Record}
* object.
* <code>
* <?php
* // Retrieve a set of MARCXML records from a file
* $journals = new File_MARCXML('journals.xml', SOURCE_FILE);
*
* // Iterate through the retrieved records
* while ($record = $journals->next()) {
* print $record;
* print "\n";
* }
*
* ?>
* </code>
*
* @return File_MARC_Record next record, or false if there are
* no more records
*/
function next()
{
if (isset($this->source->record[$this->counter])) {
$record = $this->source->record[$this->counter++];
} elseif ($this->source->getName() == "record" && $this->counter == 0) {
$record = $this->source;
$this->counter++;
} else {
return false;
}
if ($record) {
return $this->_decode($record);
} else {
return false;
}
}
// }}}
// {{{ _decode()
/**
* Decode a given MARCXML record
*
* @param string $text MARCXML record element
*
* @return File_MARC_Record Decoded File_MARC_Record object
*/
private function _decode($text)
{
$marc = new File_MARC_Record($this);
// Store leader
$marc->setLeader($text->leader);
// go through all the control fields
foreach ($text->controlfield as $controlfield) {
$marc->appendField(new File_MARC_Control_Field((string)$controlfield['tag'], $controlfield));
}
// go through all the data fields
foreach ($text->datafield as $datafield) {
$subfield_data = array();
foreach ($datafield->subfield as $subfield) {
$subfield_data[] = new File_MARC_Subfield((string)$subfield['code'], $subfield);
}
// If the data is invalid, let's just ignore the one field
try {
$new_field = new File_MARC_Data_Field((string)$datafield['tag'], $subfield_data, $datafield['ind1'], $datafield['ind2']);
$marc->appendField($new_field);
} catch (Exception $e) {
$marc->addWarning($e->getMessage());
}
}
return $marc;
}
// }}}
}
// }}}
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