154 lines
4.5 KiB
PHP
154 lines
4.5 KiB
PHP
<?php
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/*
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* StatusNet - the distributed open-source microblogging tool
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* Copyright (C) 2010, StatusNet, Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* Wrapper for Memcached_DataObject which knows its own schema definition.
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* Builds its own damn settings from a schema definition.
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*
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* @author Brion Vibber <brion@status.net>
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*/
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abstract class Managed_DataObject extends Memcached_DataObject
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{
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/**
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* The One True Thingy that must be defined and declared.
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*/
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public static abstract function schemaDef();
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/**
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* get/set an associative array of table columns
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*
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* @access public
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* @return array (associative)
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*/
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function table()
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{
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// Hack for PHP 5.2 not supporting late static binding
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//$table = static::schemaDef();
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$table = call_user_func(array(get_class($this), 'schemaDef'));
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return array_map(array($this, 'columnBitmap'), $table['fields']);
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}
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/**
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* get/set an array of table primary keys
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*
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* Key info is pulled from the table definition array.
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*
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* @access private
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* @return array
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*/
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function keys()
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{
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return array_keys($this->keyTypes());
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}
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/**
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* Get a sequence key
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*
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* Returns the first serial column defined in the table, if any.
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*
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* @access private
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* @return array (column,use_native,sequence_name)
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*/
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function sequenceKey()
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{
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$table = call_user_func(array(get_class($this), 'schemaDef'));
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foreach ($table['fields'] as $name => $column) {
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if ($column['type'] == 'serial') {
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// We have a serial/autoincrement column.
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// Declare it to be a native sequence!
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return array($name, true, false);
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}
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}
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// No sequence key on this table.
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return array(false, false, false);
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}
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/**
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* Return key definitions for DB_DataObject and Memcache_DataObject.
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*
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* DB_DataObject needs to know about keys that the table has; this function
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* defines them.
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*
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* @return array key definitions
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*/
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function keyTypes()
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{
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$table = call_user_func(array(get_class($this), 'schemaDef'));
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if (!empty($table['unique keys'])) {
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foreach ($table['unique keys'] as $idx => $fields) {
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foreach ($fields as $name) {
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$keys[$name] = 'U';
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}
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}
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}
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if (!empty($table['primary key'])) {
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foreach ($table['primary key'] as $name) {
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$keys[$name] = 'K';
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}
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}
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return $keys;
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}
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/**
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* Build the appropriate DB_DataObject bitfield map for this field.
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*
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* @param array $column
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* @return int
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*/
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function columnBitmap($column)
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{
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$type = $column['type'];
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// For quoting style...
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$intTypes = array('int',
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'integer',
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'float',
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'serial',
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'numeric');
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if (in_array($type, $intTypes)) {
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$style = DB_DATAOBJECT_INT;
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} else {
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$style = DB_DATAOBJECT_STR;
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}
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// Data type formatting style...
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$formatStyles = array('blob' => DB_DATAOBJECT_BLOB,
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'text' => DB_DATAOBJECT_TXT,
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'date' => DB_DATAOBJECT_DATE,
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'time' => DB_DATAOBJECT_TIME,
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'datetime' => DB_DATAOBJECT_DATE | DB_DATAOBJECT_TIME,
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'timestamp' => DB_DATAOBJECT_MYSQLTIMESTAMP);
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if (isset($formatStyles[$type])) {
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$style |= $formatStyles[$type];
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}
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// Nullable?
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if (!empty($column['not null'])) {
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$style |= DB_DATAOBJECT_NOTNULL;
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}
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return $style;
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}
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} |