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File: class.xml.db.interpreter.inc

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  Classes of Richard Heyes  >  XML Db Schema Interpreter  >  class.xml.db.interpreter.inc  >  Download  
File: class.xml.db.interpreter.inc
Role: ???
Content type: text/plain
Description: The class file.
Class: XML Db Schema Interpreter
Interprets database schemas written in XML
Author: By
Last change:
Date: 14 years ago
Size: 7,139 bytes
 

Contents

Class file image Download
s<?php
/***************************************
** Title........: XML Database Interpreter
** Filename.....: xml.db.interpreter.php
** Author.......: Richard Heyes
** Version......: 1.0
** Notes........:
** Last changed.: 7/8/2000
** Last change..:
***************************************/

        class xml_dbas{

                var $xml;
                var $data;
                var $temp_sql;
                var $table_options;
                var $sql    = array();
                var $fields = array();
                var $sql_errors = array();

        /***************************************
        ** Constructor function. Creates the xml
        ** parser.
        ***************************************/
                function xml_dbas(){
                        $this->xml = xml_parser_create();
                        xml_set_object($this->xml, &$this);
                }

        /***************************************
        ** Accessor function for $sql
        ***************************************/
                function get_sql(){
                        return $this->sql;
                }

        /***************************************
        ** Accessor function for $sql_errors
        ***************************************/
                function get_sql_errors(){
                        return $this->sql_errors;
                }

        /***************************************
        ** Accessor function for $data
        ***************************************/
                function get_data(){
                        return $this->data;
                }

        /***************************************
        ** Start element function.
        ***************************************/
                function start_element($xml, $element, $attributes){
                        switch($element){
                                case 'DATABASE': if(isset($attributes['IF_NOT_EXISTS']) AND $attributes['IF_NOT_EXISTS'] == 'yes') $if_not_exists = 'IF NOT EXISTS '; else $if_not_exists = '';
                                                 $this->sql[] = 'CREATE DATABASE '.$if_not_exists.$attributes['NAME'];
                                                 $this->sql[] = 'USE '.$attributes['NAME'];
                                                 break;

                                case 'TABLE':    if(isset($attributes['TEMPORARY'])     AND $attributes['TEMPORARY'] == 'yes')     $temporary = 'TEMPORARY '; else $temporary = '';
                                                 if(isset($attributes['IF_NOT_EXISTS']) AND $attributes['IF_NOT_EXISTS'] == 'yes') $if_not_exists = 'IF NOT EXISTS '; else $if_not_exists = '';
                                                 if(isset($attributes['OPTIONS'])       AND $attributes['OPTIONS'] != '')          $this->table_options = ' '.$attributes['OPTIONS']; else $this->table_options = '';
                                                 $this->temp_sql = 'CREATE '.$temporary.'TABLE '.$if_not_exists.$attributes['NAME'].' (';
                                                 break;

                                case 'FIELD':    $temp_var = $attributes['NAME'].' '.$attributes['TYPE'].'('.$attributes['SIZE'].')';
                                                 if(isset($attributes['NULL']) AND $attributes['NULL'] == 'no') $temp_var.= ' NOT NULL'; else $temp_var .= ' NULL';
                                                 if(isset($attributes['DEFAULT'])) $temp_var .= " DEFAULT '".$attributes['DEFAULT']."'";
                                                 if(isset($attributes['EXTRA']))   $temp_var .= ' '.$attributes['EXTRA'];
                                                 $this->fields[] = $temp_var;
                                                 break;

                                case 'KEY':      if(isset($attributes['TYPE']) AND $attributes['TYPE'] == 'primary') $this->fields[] = 'PRIMARY KEY ('.$attributes['FIELD'].')';
                                                 if(isset($attributes['TYPE']) AND $attributes['TYPE'] == 'unique')  $this->fields[] = 'UNIQUE '.$attributes['NAME'].' ('.$attributes['FIELD'].')';
                                                 if(isset($attributes['TYPE']) AND $attributes['TYPE'] == 'index')   $this->fields[] = 'INDEX '.$attributes['NAME'].' ('.$attributes['FIELD'].')';
                                                 break;

                                default:         break;
                        }
                }

        /***************************************
        ** End element function.
        ***************************************/
                function end_element($xml, $element){
                        switch($element){
                                case 'TABLE':    $this->sql[] = $this->temp_sql.implode(', ', $this->fields).')'.$this->table_options;
                                                 $this->temp_sql = '';
                                                 $this->fields   = array();
                                                 break;

                                default:         break;
                        }
                }

        /***************************************
        ** Retrieve the schema of the database.
        ** Second argument:
        ** TRUE  = is file
        ** FALSE = is data
        ***************************************/
                function set_schema($data, $is_file){
                        if($is_file == TRUE){
                                if($fp = fopen($data, 'r')){
                                        $this->data = fread($fp, filesize($data));
                                        fclose($fp);
                                }else{
                                        return('Error: Unable to open file.');
                                }
                        }else{
                                $this->data = $data;
                        }
                }

        /***************************************
        ** Parse the bugger.
        ***************************************/
                function parse_schema(){
                        xml_parser_set_option($this->xml, XML_OPTION_CASE_FOLDING, TRUE);
                        xml_set_element_handler($this->xml, 'start_element', 'end_element');
                        xml_parse($this->xml, $this->data);
                }

        /***************************************
        ** Function to execute the sql.
        ***************************************/
                function create_dbas($host, $user, $pass, $database = ''){
                        $connection = mysql_connect($host, $user, $pass);
                        if($database != '') mysql_select_db($database, $connection);
                        for($i=0; $i<count($this->sql); $i++) mysql_query($this->sql[$i], $connection) OR $this->sql_errors[] = mysql_error($connection);
                }

        } // End of class.
?>