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Tue, May 14, 18:02

Processor.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: Processor.inc (flexelink core)
// Classes: Processor
// Requires: AELExecutor, LinkResolver, Node, AVarSpec
// Included: core/AEvalLan.inc
// core/LinkResolver.inc
// core/TreeNode.inc
// core/ASpec.inc
// dbparams.inc
//==========================================================================
include_once( EXECUTOR );
include_once( LINK_RESOLVER );
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
class BehaviorData {
var $name;
function BehaviorData(){}
}
class NBehavior {
var $conditions;
function NBehavior( $data )
{
include(DB);
$db=mysql_connect( $DB_HOST, $DB_USER, $DB_PASSWD );
mysql_selectdb( $DB_DB, $db );
$qry="select eval_order, el_condition
from flxBEHAVIORCONDITIONS
where otype='".$data->name."'
order by eval_order";
$qh=mysql_query($qry, $db);
$this->conditions=array();
while($row=mysql_fetch_array($qh))
{
list($eorder, $ccond)=$row;
$d=new BehCondData();
$d->behname=$data->name;
$d->eorder=$eorder;
$d->code=$ccond;
$bc=new BehCondition( $d );
if($bc!=null)
{
array_push($this->conditions, $bc);
}
}
//mysql_close($db);
}
function getResult( $vars, $record="" )
{
foreach($this->conditions as $condition)
{
if($condition==null) continue;
list($errcode, $str)=$condition->evaluate( $vars );
if($errcode<0) return array(0, $str);
if($errcode==1) return array(1, $str);
}
return array(1, "");
}
}
class IBehavior {
var $conditions;
function IBehavior( $data )
{
include(DB);
$db=mysql_connect( $DB_HOST, $DB_USER, $DB_PASSWD );
mysql_selectdb( $DB_DB, $db );
$qry="select eval_order, el_condition
from flxBEHAVIORCONDITIONS
where otype='".$data->name."'
order by eval_order";
$qh=mysql_query($qry, $db);
$this->conditions=array();
while($row=mysql_fetch_array($qh))
{
list($eorder, $ccond)=$row;
$d=new BehCondData();
$d->behname=$data->name;
$d->eorder=$eorder;
$d->code=$ccond;
$bc=new BehCondition( $d );
if($bc!=null)
array_push($this->conditions, $bc);
}
//mysql_close($db);
}
function getResult( $vars, $record="" )
{
$str="";
foreach($this->conditions as $condition)
{
if($condition==null) continue;
list($errcode, $str)=$condition->evaluate( $vars );
if($errcode<0) return array(0, $str);
if($errcode==1) break;
}
$record=trim($record);
$end_tag="</record>";
$result=substr($record, 0, strlen($record)-strlen($end_tag)).$str.$end_tag;
return array(1, $result);
}
}
class BehCondData {
var $behname;
var $eorder;
var $code;
function BehCondData(){}
}
class BehCondition {
var $exec;
var $condition;
var $actions;
function BehCondition( $data )
{
$this->exec=new AELExecutor();
$this->condition=null;
$this->actions=array();
list($ok, $msg)=$this->exec->checkCode( $data->code );
if(!$ok) return null;
$this->condition=$msg;
include( DB );
$db=mysql_connect( $DB_HOST, $DB_USER, $DB_PASSWD );
mysql_selectdb( $DB_DB, $db );
$qry="select el_code
from flxBEHAVIORCONDITIONSACTIONS
where otype='".$data->behname."'
and eval_order=".$data->eorder."
order by apply_order";
$qh=mysql_query($qry, $db);
while($row=mysql_fetch_array($qh))
{
list($ok, $msg)=$this->exec->checkCode($row[0]);
if($ok)
{
array_push($this->actions, $msg);
}
}
mysql_close($db);
}
function evaluate( $vars )
{
list($ok, $res)=$this->exec->execTree( $this->condition, $vars );
if(!$ok) return array(-1, "Error executing action: $res");
if($res!="TRUE") return array(0, "FALSE");
$str="";
foreach($this->actions as $action)
{
list($ok, $res)=$this->exec->execTree( $action, $vars);
if(!$ok) continue;
$str.=$res;
}
return array(1, $str);
}
}
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// Class: Processor
// Purpose: This is a wrapper class for the FlexElink formatting process.
// It allows to apply a certaint pre-configured (in the Fxk config DB)
// behavior with a set of internal variables from a single record, and
// gives back resulting string. There is a (private) method for each
// different type of behavior that the processor has to interpret: NORMAL,
// IENRICH. It's able to apply corresponding method for each behavior type
// (Visible) Atributes: all private
// (Visible) Methods:
// constructor --> initializes processor
// getOutput(intvars, otype, xml_doc*) ----> applies "otype"
// pre-configured behavior from the configuration DB
// with the internal vars "intvars" for obtaining the
// resulting string.
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
class Processor {
var $behaviors;
//---------------------------------------------------------------------------
// Method: CONSTRUCTOR Processor (public)
// Description: Initializes class atributes needed to function. Creates the
// link to the config DB; the instance of the code executor and link
// resolver; sets the link resolver for the code executor(in order to
// enable link resolution on the executor)
// Params:
//---------------------------------------------------------------------------
function Processor()
{
$this->behaviors=array();
}
//---------------------------------------------------------------------------
// Method: DESTRUCTOR destroy (public)
// Description:
// Params:
//---------------------------------------------------------------------------
function destroy()
{
}
function getBehavior( $behname )
{
$behname=strtoupper(trim($behname));
if(trim($behname)=="") return null;
if(isset($this->behaviors[$behname]))
{
return $this->behaviors[$behname];
}
else
{
include( DB );
$db=mysql_connect( $DB_HOST, $DB_USER, $DB_PASSWD );
mysql_selectdb( $DB_DB, $db );
$qry="select type
from flxBEHAVIORS
where name='$behname'";
$qh=mysql_query($qry, $db);
if(mysql_num_rows($qh)!=1)
$res=null;
else
{
list($type)=mysql_fetch_array($qh);
$d=new BehaviorData();
$d->name=$behname;
if($type=="NORMAL")
{
$res=new NBehavior( $d );
}
elseif($type=="IENRICH")
{
$res=new IBehavior( $d );
}
if($res!=null)
{
$this->behaviors[$behname]=$res;
}
}
// mysql_close($db);
return $res;
}
}
//---------------------------------------------------------------------------
// Method: getOutput (public)
// Description: This method takes a behavior identifier as parameter,
// retrieves it from the config DB, checks the type of behavior, applies
// in each case corresponding private method, and gives the result or
// an error if something didn't go well.
// Params:
// intvars -> (Vars) reference to the internal vars collection extracted
// from the record over which the behavior has to be applied
// otype ---> (string) Output type or behavior identifier to apply and
// that has to be pre-configure in the config DB
// xml_doc -> (string) It's optional. In case of specified, it contains the
// XML document of the record being processed (mandatory for
// enriching behavior types)
// Return value: (array) As result a two-element array is given; first value
// is an error code an is 1 when the behavior was correctly applied; in
// this case the second value contains the resulting string. First array
// value can be also 0 when some error occured while applying behavior;
// in this case, the second value will contain a string with the error
// description
//---------------------------------------------------------------------------
function getOutput( $intvars, $otype, $xml_doc="" )
{
$b=$this->getBehavior( $otype );
if($b==null) return array(0, "Undefined output type $otype");
list($ok, $msg)=$b->getResult($intvars, $xml_doc);
if(!$ok) return array(0, "Errors evaluating output type $otype: $msg");
return array(1, $msg);
}
}
?>

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