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Update new xml query classes with xe 1.5

Browse source 
with improved query argument support and update and delete queries

git-svn-id: http://xe-core.googlecode.com/svn/branches/1.5.0-DB@8378 201d5d3c-b55e-5fd7-737f-ddc643e51545
This commit is contained in:
mosmartin 2011-05-19 13:06:56 +00:00
parent 5f9a5249ac
commit 7dbe0626b6
39 changed files with 1619 additions and 540 deletions
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98
classes/xml/xmlquery/DBParser.class.php Normal file
View file

@ -0,0 +1,98 @@
<?php
class DBParser {
var $escape_char;
var $table_prefix;
function DBParser($escape_char, $table_prefix = "xe_"){
$this->escape_char = $escape_char;
$this->table_prefix = $table_prefix;
}
function getEscapeChar(){
return $this->escape_char;
}
function escape($name){
return $this->escape_char . $name . $this->escape_char;
}
function escapeString($name){
return "'".$name."'";
}
function parseTableName($name){
return $this->table_prefix . $name;
}
function parseColumnName($name){
return $this->escapeColumn($name);
}
function escapeColumn($column_name){
if($this->isUnqualifiedColumnName($column_name))
return $this->escape($column_name);
if($this->isQualifiedColumnName($column_name)){
list($table, $column) = explode('.', $column_name);
// $table can also be an alias, so the prefix should not be added
return $this->escape($table).'.'.$this->escape($column);
//return $this->escape($this->parseTableName($table)).'.'.$this->escape($column);
}
}
function isUnqualifiedColumnName($column_name){
if(strpos($column_name,'.')===false && strpos($column_name,'(')===false) return true;
return false;
}
function isQualifiedColumnName($column_name){
if(strpos($column_name,'.')!==false && strpos($column_name,'(')===false) return true;
return false;
}
function parseExpression($column_name){
$functions = preg_split('/([\+\-\*\/\ ])/', $column_name, -1, PREG_SPLIT_DELIM_CAPTURE|PREG_SPLIT_NO_EMPTY);
foreach($functions as &$function){
if(strlen($function)==1) continue; // skip delimiters
$pos = strrpos("(", $function);
$matches = preg_split('/([a-zA-Z0-9_*]+)/', $function, -1, PREG_SPLIT_DELIM_CAPTURE|PREG_SPLIT_NO_EMPTY);
$total_brackets = substr_count($function, "(");
$brackets = 0;
foreach($matches as &$match){
if($match == '(') {$brackets++; continue;}
if(strpos($match,')') !== false) continue;
if(in_array($match, array(',', '.'))) continue;
if($brackets == $total_brackets){
if(!is_numeric($match)) {
$match = $this->escapeColumnExpression($match);
}
}
}
$function = implode('', $matches);
}
return implode('', $functions);
}
function isStar($column_name){
if(substr($column_name,-1) == '*') return true;
return false;
}
/*
* Checks to see if expression is an aggregate star function
* like count(*)
*/
function isStarFunction($column_name){
if(strpos($column_name, "(*)")!==false) return true;
return false;
}
function escapeColumnExpression($column_name){
if($this->isStar($column_name)) return $column_name;
if($this->isStarFunction($column_name)){
return $column_name;
}
return $this->escapeColumn($column_name);
}
}