mirror of
https://github.com/silverstripe/silverstripe-framework
synced 2024-07-06 11:29:27 +02:00
4a5d9b03f8
git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/sapphire/trunk@39001 467b73ca-7a2a-4603-9d3b-597d59a354a9
70 lines
1.7 KiB
PHP
Executable File
70 lines
1.7 KiB
PHP
Executable File
<?php
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/**
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* @package sapphire
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* @subpackage core
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*/
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/**
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* Plug-ins for additional functionality in your DataObjects.
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* DataObject decorators add extra functionality to your data objects.
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*/
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abstract class DataObjectDecorator extends Object {
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/**
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* The DataObject that owns this decorator.
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* @var DataObject
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*/
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protected $owner;
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/**
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* Set the owner of this decorator.
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* @param DataObject $owner
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*/
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function setOwner(DataObject $owner) {
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$this->owner = $owner;
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}
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/**
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* Load the extra database fields defined in extraDBFields.
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*/
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function loadExtraDBFields() {
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$fields = $this->extraDBFields();
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$className = $this->owner->class;
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if($fields) {
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foreach($fields as $relationType => $fields) {
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if(in_array($relationType, array('db','has_one','many_many','belongs_many_many','many_many_extraFields'))) {
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eval("$className::\$$relationType = array_merge((array){$className}::\$$relationType, (array)\$fields);");
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}
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}
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}
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}
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/**
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* Edit the given query object to support queries for this extension.
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* @param SQLQuery $query Query to augment.
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*/
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abstract function augmentSQL(SQLQuery &$query);
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/**
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* Update the database schema as required by this extension.
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*/
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abstract function augmentDatabase();
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/**
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* Define extra database fields.
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* Return an map where the keys are db, has_one, etc, and the values are additional fields / relations to be defined.
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*/
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function extraDBFields() {
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return array();
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}
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/**
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* This function is used to provide modifications to the form in the CMS by the
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* decorator. By default, no changes are made - if you want you can overload
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* this function.
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*/
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function updateCMSFields(FieldSet &$fields) {
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}
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}
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?>
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