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OAISpecExtractor.inc.php
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Sat, May 11, 16:39

OAISpecExtractor.inc.php
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<?
## $Id$
## This file is part of the CERN Document Server Software (CDSware).
## Copyright (C) 2002, 2003, 2004, 2005, 2006 CERN.
##
## The CDSware is free software; you can redistribute it and/or
## modify it under the terms of the GNU General Public License as
## published by the Free Software Foundation; either version 2 of the
## License, or (at your option) any later version.
##
## The CDSware 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
## General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with CDSware; if not, write to the Free Software Foundation, Inc.,
## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
//==========================================================================
// File: OAISpecExtractor.inc (flexElink core)
// Classes: OAIVarExtractor
// Requires: Vars
// Included: core/IntVars.inc, DB
//==========================================================================
include_once(INTVARS);
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// Class: OAIVarExtractor
// Purpose:
// Attributes:
// Methods:
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
class OAIVarExtractor {
var $xml_parser;
var $doc;
var $db;
var $type;
var $errortext;
var $intvars;
var $CFcache;
var $MFcache;
var $SFcache;
function OAIVarExtractor()
{
include( DB );
$this->db=$db=mysql_pconnect( $DB_HOST, $DB_USER, $DB_PASSWD );
if($this->db)
mysql_selectdb( $DB_DB, $this->db );
$this->errortext="";
$this->CFcache=array();
$this->MFcache=array();
$this->SFcache=array();
}
function destroy()
{
}
function getError()
{
return $this->errortext;
}
function inCFcache( $tag )
{
return $this->CFcache["$tag"];
}
function addCFcache($tag, $vars)
{
$this->CFcache["$tag"]=$vars;
}
function inMFcache($id, $i1, $i2)
{
return $this->MFcache["$id::$i1::$i2"];
}
function addMFcache($id, $i1, $i2, $vars)
{
$this->MFcache["$id::$i1::$i2"]=$vars;
}
function inSFcache($varname, $label)
{
return $this->SFcache["$varname::$label"];
}
function addSFcache($varname, $label, $vars)
{
$this->SFcache["$varname::$label"]=$vars;
}
function getVarfromCF( $tag )
{
$vars=$this->inCFcache( $tag );
if($vars!=null)
return $vars;
$tag=addslashes($tag);
$qry="select varname, mvalues from flxXMLMARCEXTRULES where type='".
addslashes($this->type)."' and att_id='$tag'
and ftype='CONTROLFIELD'";
$res=mysql_query($qry, $this->db);
$vars=array();
while($row=mysql_fetch_array($res))
{
array_push( $vars, array($row["varname"], $row["mvalues"]) );
}
$this->addCFcache( $tag, $vars );
return $vars;
}
function getVarfromMF( $id, $i1, $i2 )
{
$vars=$this->inMFcache( $id, $i1, $i2 );
if($vars!=null)
return $vars;
$id=addslashes($id);
$i1=addslashes($i1);
$i2=addslashes($i2);
$qry="select varname, mvalues from flxXMLMARCEXTRULES where type='".
addslashes($this->type)."' and att_id='".addslashes($id).
"' and att_i1='".addslashes($i1)."' and att_i2='".addslashes($i2)."'";
$res=mysql_query($qry, $this->db);
$vars=array();
while($row=mysql_fetch_array($res))
{
array_push( $vars, array($row["varname"], $row["mvalues"]) );
}
$this->addMFcache( $id, $i1, $i2, $vars );
return $vars;
}
function getVarfromSF( $varname, $label )
{
$vars=$this->inSFcache( $varname, $label );
if($vars!=null)
return $vars;
$varname=addslashes($varname);
$label=addslashes($label);
$qry="select sfname from flxXMLMARCEXTRULESUBFIELDS where type='".
addslashes($this->type)."' and varname='".addslashes($varname).
"' and att_label='".addslashes($label)."'";
$res=mysql_query($qry, $this->db);
$vars=array();
while($row=mysql_fetch_array($res))
{
array_push( $vars, $row["sfname"] );
}
$this->addSFcache( $varname, $label, $vars );
return $vars;
}
function getVars( $type, $doc )
{
$this->type=strtoupper(trim($type));
if(!$this->db)
{
$this->errortext="Invalid database resource";
return null;
}
$this->intvars=new Vars();
$this->insideCF=0;
$this->insideMF=0;
$this->insideSF=0;
$this->ignore=0;
$this->doc=$doc;
$this->xml_parser=xml_parser_create();
xml_set_object($this->xml_parser, &$this);
xml_parser_set_option($this->xml_parser, XML_OPTION_CASE_FOLDING, 1);
xml_set_element_handler($this->xml_parser, "startElement", "endElement");
xml_set_character_data_handler($this->xml_parser, "characterData");
if(!xml_parse($this->xml_parser, $doc, 1))
{
$this->errortext=sprintf("XML error: %s at line %d",
xml_error_string(xml_get_error_code($this->xml_parser)),
xml_get_current_line_number($this->xml_parser));
xml_parser_free($this->xml_parser);
return null;
}
xml_parser_free($this->xml_parser);
return $this->intvars;
}
function startElement($parser, $name, $attrs)
{
if($this->ignore>0)
{
$this->ignore++;
return;
}
if($name=="CONTROLFIELD")
{
if($this->insideCF)
{
$this->ignore--;
return;
}
$this->insideCF=1;
$this->tempCF="";
$this->varsCF=$this->getVarfromCF( $attrs["TAG"] );
}
elseif($name=="DATAFIELD")
{
//If we are already processing a VARFIELD element and we find another
// one inside, it's a wrong XML, so we just ignore until the wrong
// element and all it contains is finished
if( ($this->insideMF) || ($this->insideCF) )
{
$this->ignore++;
return;
}
$this->insideMF=1;
$this->tempMF="";
$this->varsMF=$this->getVarfromMF(
$attrs["TAG"], $attrs["IND1"], $attrs["IND2"]);
}
elseif($name=="SUBFIELD")
{
//When we find a SUBFIELD element, we need to check that it's contained
// by a VARFIELD one. It's also a wrong XML if we find another SUBFIELD
// tag inside it
if((!$this->insideMF)||($this->insideSF))
{
$this->ignore++;
return;
}
$this->insideSF=1;
$this->tempSF="";
$this->labelSF=$attrs["CODE"];
}
//For other types of TAGs we don't care, because is supposed that the
// input will be OK
else
{
if($name!="RECORD")
$this->ignore++;
}
}
function endElement($parser, $name)
{
if($this->ignore>0)
{
$this->ignore--;
return;
}
if($name=="CONTROLFIELD")
{
$this->insideCF=0;
if(($this->varsCF!=null)&&(count($this->varsCF)>0))
{
foreach($this->varsCF as $var)
{
list($varname, $mvalues)=$var;
$this->intvars->addValue( $varname, $this->tempCF );
if($mvalues=="S")
$this->intvars->inextValue( $varname );
}
}
}
//As the XML parser will check the validness of the XML, there is no
// possibility to find a closing DATAFIELD before a closing SUBFIELD, so
// we don't need to check it
elseif($name=="DATAFIELD")
{
$this->insideMF=0;
if(($this->varsMF!=null)&&(count($this->varsMF)>0))
{
foreach($this->varsMF as $var)
{
list($varname, $mvalues)=$var;
$this->intvars->addValue( $varname, $this->tempMF );
if($mvalues=="S")
$this->intvars->inextValue( $varname );
}
}
}
elseif($name=="SUBFIELD")
{
$this->insideSF=0;
if(($this->varsMF!=null)&&(count($this->varsMF)>0))
{
foreach($this->varsMF as $var)
{
list($varname, $mvalues)=$var;
$this->intvars->addVar($varname);
$ow=true;
if($mvalues!="S") $ow=false;
$sfs=$this->getVarfromSF( $varname, $this->labelSF );
if(($sfs!=null)&&(count($sfs)>0))
{
foreach($sfs as $sfname)
{
$this->intvars->addSFValue( $varname, $sfname, $this->tempSF, $ow );
}
}
}
}
}
}
function characterData($parser, $data)
{
if($this->ignore>0)
return;
if($this->insideCF)
{
$this->tempCF.=$data;
}
elseif($this->insideMF)
{
if($this->insideSF)
$this->tempSF.=$data;
else
$this->tempMF.=$data;
}
}
}
?>

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