Object management

Object Collection

An Object Collection permit to store objects and find them in constant time. Objects are grouped by model and by id. Obviously an object without id property cannot be stored in Object Collection.

Example of an Object Collection structure :

[
    person : [
        an_id_one : person_object_one,
        an_id_two : person_object_two
    ],
    town : [
        an_id_one : town_object_one
    ],
    house : [
        an_id_one : house_object_one,
        an_id_two : house_object_two
    ]
]

Example of usage :

$lPersonOne; // consider object already exists, has a model Person and has an id 'one'

$objectCollection = new OjectCollection();
$objectCollection->addObject($lPersonOne);

$objectCollection->hasObject('one', 'Person');           // return true
$object = $objectCollection->getObject('one', 'Person'); // return object previously added

$objectCollection->hasObject('two', 'Person');           // return false
$object = $objectCollection->getObject('two', 'Person'); // return null

$objectCollection->hasObject('one', 'House');            // return false
$object = $objectCollection->getObject('one', 'House');  // return null

Main Object Collection

MainObjectCollection is a singleton that extends ObjectCollection. It store automatically objects with MainModel having id property(ies). This singleton is useful to know which object already exists and avoid redundant deserializations.

To retrieve an object call :

$object = MainObjectCollection::getInstance()->getObject('an_id', 'a_model_name'); // null if object not found

Objects are automatically added when :

object is deserialized (see deserialization section)

$model = ModelManager::getInstance()->getInstanceModel('person');

$person1 = MainObjectCollection::getInstance()->getObject(1, 'person'); // null
$person2 = $model->loadObject(1);
$person3 = MainObjectCollection::getInstance()->getObject(1, 'person');

echo $person2 === $person3 ? 'same instance' : 'different instance';
// output 'same instance'

when import interfaced object (see Object interfacing section)

$model = ModelManager::getInstance()->getInstanceModel('person');
$stdInterfacer = new StdObjectInterfacer();
$stdOject = json_decode('{"id":1,"firstName":"John"}');

$person1 = MainObjectCollection::getInstance()->getObject(1, 'person'); // null
$person2 = $stdInterfacer->import($stdOject, $model);
$person3 = MainObjectCollection::getInstance()->getObject(1, 'person');

echo $person2 === $person3 ? 'same instance' : 'different instance';
// output 'same instance'

when you set id of an object

$person1 = MainObjectCollection::getInstance()->getObject(1, 'person'); // null
$person2 = new Object('person');
$person2->setValue('id', 1);
$person3 = MainObjectCollection::getInstance()->getObject(1, 'person');

echo $person2 === $person3 ? 'same instance' : 'different instance';
// output 'same instance'

Note that if an instance is already added in MainObjectCollection it will not be replaced.

$person = new Object('person');
$person->setValue('id', 1);

$person2 = new Object('person');
$person2->setValue('id', 1);

$person3 = MainObjectCollection::getInstance()->getObject(1, 'person');

echo $person === $person3 ? 'same instance' : 'different instance';
// output 'same instance'

echo $person2 === $person3 ? 'same instance' : 'different instance';
// output 'different instance'

Object serialization

Whatever is your serialzation you just have to call one function save() to serialize your object. Obviously the model associated to your object must have a defined serialization.

$object->save();

Specific case for sql database

Your table has an incremental id

Like other serializations call save() function but there are two cases to identify :

if your Object doesn't have id set, an INSERT will be executed. if INSERT is successfull, id will be set in your object.
if Object has id set, an UPDATE will be executed

Your table doesn't have an incremental id

you must specify your operation (insert or update)

$object->save(SqlTable::INSERT);
$object->save(SqlTable::UPDATE);

Object deserialization

Whatever is your serialzation you just have to call one function loadObject() to deserialize your object. Obviously the model associated to your object must have a serialization. When you load an object this object is stored in MainObjectCollection.

$model = ModelManager::getInstance()->getInstanceModel('a_model_name');
$object = $model->loadObject('an_id');

// if your model has several id properties you must specify them in a json encoded array 
// order of values must be the same as order of id properties in manifest
$object = $modelTwo->loadObject('["an_id_1","an_id_2"]');

Thanks to MainObjectCollection if an object has already been loaded it will not be loaded again (except if you force it).

// load object
$object = $model->loadObject('12');

// return same instance object retrieve from MainObjectCollection
$object = $model->loadObject('12');

// like previous instruction but force to call deserialization 
// and merge current object instance with serialized object
$object = $model->loadObject('12', true);

Object interfacing

Interfacing consist to import entry in specific format to populate a comhon object or conversely export comhon object to specific format. Comhon! provide three interfacer :

interfacer	handled format	handled parsed format
StdObjectInterfacer	JSON	stdClass
AssocArrayInterfacer	JSON	array
XMLInterfacer	XML	DOMElement

All interfacers extends Interfacer so they are very similar and have the same management. We will give example with a random interfacer but keep in mind that every examples are possible with all interfacers.

import

$model = ModelManager::getInstance()->getInstanceModel('person');
$stdOject = json_decode('{"id":1,"firstName":"John"}');

$stdInterfacer = new StdObjectInterfacer();

// via interfacer
$importedPerson = $stdInterfacer->import($stdOject, $model); // return instance of ComhonObject
echo $importedPerson->getValue('firstName'); // output 'John'

// via model
$importedPerson = $model->import($stdOject, $stdInterfacer); // return instance of ComhonObject
echo $importedPerson->getValue('firstName'); // output 'John'

// via comhon object
$person = new Object($model);
$person->setValue('lastName', 'Doe');
$person->fill($stdOject, $stdInterfacer); // fill current instance of ComhonObject
echo $person->getValue('firstName'); // output 'John'
echo $person->getValue('lastName'); // output 'Doe'

Foreign properties import

When a value corresponding to a foreign property is imported it's only an id. Import will automaticaly try to find if referenced object exists in Main Object Collection and get this instance otherwise it will create a new object.

$model = ModelManager::getInstance()->getInstanceModel('person');
$stdOject = json_decode('{"id":1,"firstName":"John","lastName":"Doe","mother":2,"children":[3,4]}');

$woman = new Object($model);
$woman->setValue('id', 2);
$woman->setValue('firstName', 'Jane');
$woman->setValue('lastName', 'Doe');

$stdInterfacer = new StdObjectInterfacer();

$importedPerson = $stdInterfacer->import($stdOject, $model); // return instance of ComhonObject
echo $importedPerson->getValue('children')->getValue(1)->getValue('id');
// output 4
echo $importedPerson->getValue('mother')->getValue('firstName');
// output 'Jane'
echo $woman === $importedPerson->getValue('mother') ? 'same instance' : 'different instance';
// output 'same instance'

export

$model; // we take model previously instanciated in import
$person; // we take person previously set in import

$XMLInterfacer = new XMLInterfacer();

// via interfacer
$exportedStdObject = $XMLInterfacer->export($person); // return instance of DOMNode

// via comhon object
$exportedStdObject = $person->export($XMLInterfacer); // return instance of DOMNode

// via model (be careful when you use this method, $model and $person model must match)
$exportedStdObject = $model->export($person, $XMLInterfacer); // return instance of DOMNode

// stringify exported object
$xml = $XMLInterfacer->toString($exportedStdObject); // return XML string
echo $xml;

output :

<person id="1" firstName="John" lastName="Doe">
    <mother>2</mother>
    <children>
        <child>3</child>
        <child>4</child>
    </children>
</person>

Foreign properties export

As you can see in previous example, value mother is exported as a simple id even if mother is actually an object. Foreign properties are exported like that for a simple reason, value can be defined elsewhere, and if we describe all object, same value would be described several times, it can be ambiguous and dangerous.

Interfacing preferences

You can define some preferences to apply during interfacing. All preferences have their constantes defined in Interfacer class to permit you to find them easily.

there is two ways to define interfacer preferences :

by calling setter :

$stdInterfacer = new StdObjectInterfacer();
$stdInterfacer->setPrivateContext(true);
$stdInterfacer->setDateTimeZone('UTC');

during interfacing :

$stdInterfacer = new StdObjectInterfacer();
$preferences = [
    Interfacer::PRIVATE_CONTEXT => true,
    Interfacer::DATE_TIME_ZONE => 'UTC',
];
$stdObject = $stdInterfacer->export($person, $preferences);

If you don't specify preference, the default preference will be used.
If you use same instance of interfacer for several import/export, preferences previously set will be used (or default value)

$stdInterfacer = new StdObjectInterfacer();
// default value for 'privateContext' is boolean false
$stdObject = $stdInterfacer->export($person); // export is NOT in private context
$stdObject = $stdInterfacer->export($person, ['privateContext' => true]); // export is in private context
$stdObject = $stdInterfacer->export($person); // export still in private context

privateContext

Summary

Define private context (context might be private or public).
Private properties are interfaced only in private context.

Description


type	boolean
default	false
availability	import and export
constant	`Interfacer::PRIVATE_CONTEXT`

Example

// here we suppose 'id' is a private property 
$person = new Object('person');
$person->setValue('id', 1);
$person->setValue('firstName', 'John');

$stdInterfacer = new StdObjectInterfacer();

$stdObject = $stdInterfacer->export($person);
echo $stdInterfacer->toString($stdObject);
// output '{"firstName":"John"}'

$stdObject = $stdInterfacer->export($person, [Interfacer::PRIVATE_CONTEXT => true]);
echo $stdInterfacer->toString($stdObject);
// output '{"id":1,"firstName":"John"}'

$stdObject = json_decode({"id":2,"firstName":"Jane"});
$person = $stdInterfacer->import($stdObject, [Interfacer::PRIVATE_CONTEXT => false]);
echo $person->hasValue('id'); // output false
echo $person->getValue('Jane'); // output 'Jane'

$person = $stdInterfacer->import($stdObject, [Interfacer::PRIVATE_CONTEXT => true]);
echo $person->getValue('id'); // output 2
echo $person->getValue('Jane'); // output 'Jane'

serialContext

Summary

Define serial context. This preference is used implicitly for serialization/deserialization.
Properties are interfaced with their serialization name.
Aggregation properties are not interfaced in serial context.

Description


type	boolean
default	false
availability	import and export
constant	`Interfacer::SERIAL_CONTEXT`

Example

// here we suppose 'children' is an aggregation property 
// and property 'firstName' has serialization name 'first_name'
$person = new Object('person');
$person->setValue('firstName', 'John');

$childOne = new Object('person');
$childOne->setValue('id', 2);

$childTwo = new Object('person');
$childTwo->setValue('id', 3);

$children = $person->initValue('children');
$children->pushValue($childOne);
$children->pushValue($childTwo);

$stdInterfacer = new StdObjectInterfacer();

$stdObject = $stdInterfacer->export($person);
echo $stdInterfacer->toString($stdObject);
// output '{"firstName":"John","children":[2,3]}'

$stdObject = $stdInterfacer->export($person, [Interfacer::SERIAL_CONTEXT => true]);
echo $stdInterfacer->toString($stdObject);
// output '{"first_name":"John"}'

dateTimeFormat

Summary

Define date time format.
dateTime values will be exported in specified date time format.

Description


type	string
default	ISO 8601
availability	export
constant	`Interfacer::DATE_TIME_FORMAT`

Example

$person = new Object('person');
$person->setValue('firstName', 'John');
$birthDate = new ComhonDateTime('1988-09-16 16:30', new DateTimeZone('Europe/Paris'));
$person->setValue('birthDate', $birthDate);

$stdInterfacer = new StdObjectInterfacer();

$stdObject = $stdInterfacer->export($person);
echo $stdInterfacer->toString($stdObject);
// output '{"firstName":"John","birthDate":"1988-09-16T16:30:00+02:00"}'

$stdObject = $stdInterfacer->export($person, [Interfacer::DATE_TIME_FORMAT => 'Y-m-d H:i']);
echo $stdInterfacer->toString($stdObject);
// output '{"firstName":"John","birthDate":"1988-09-16 16:30"}'

dateTimeZone

Summary

Define date time zone.
dateTime values will be interfaced in specified date time zone.

Description


type	string
default	your PHP time zone
availability	import and export
constant	`Interfacer::DATE_TIME_ZONE`

Example

$person = new Object('person');
$person->setValue('firstName', 'John');
$birthDate = new ComhonDateTime('1988-09-16 16:30', new DateTimeZone('Europe/Paris'));
$person->setValue('birthDate', $birthDate);

$stdInterfacer = new StdObjectInterfacer();

$stdObject = $stdInterfacer->export($person, [Interfacer::DATE_TIME_ZONE => 'Europe/Paris']);
echo $stdInterfacer->toString($stdObject);
// output '{"firstName":"John","birthDate":"1988-09-16T16:30:00+02:00"}'

$stdObject = $stdInterfacer->export($person, [Interfacer::DATE_TIME_ZONE => 'UTC']);
echo $stdInterfacer->toString($stdObject);
// output '{"firstName":"John","birthDate":"1988-09-16T14:30:00+00:00"}'

// import dateTime that doesn't specify it time zone (Y-m-d H:i:s)
$stdObject = json_decode('{"firstName":"John","birthDate":"1988-09-16 16:30:00"}');

$person = $stdInterfacer->import($stdObject, [Interfacer::DATE_TIME_ZONE => 'Europe/Paris']);
echo $person->getValue($stdObject)->format('c');
// output '1988-09-16T16:30:00+02:00' (+02:00 => 'Europe/Paris')


$person = $stdInterfacer->import($stdObject, [Interfacer::DATE_TIME_ZONE => 'UTC']);
echo $person->getValue($stdObject)->format('c');
// output '1988-09-16T16:30:00+00:00' (+00:00 => 'UTC')

updatedValueOnly

Summary

Define if interfacer have to export only updated values (ids are always exported even if they are not updated).
This preference is applied only on current exported object. If there are "sub"-objects in current exported object, all values (of these sub-objects) will be exported even if they are not flagged as updated. This preference is used typically for sql serialization.

Description


type	boolean
default	false
availability	export
constant	`Interfacer::ONLY_UPDATED_VALUES`

Example

$person = new Object('person');
// third parameter of setValue() force status of value
// if we specify false, value we be considered as not updated
$person->setValue('id', 1, false);
$person->setValue('firstName', 'John');
$person->setValue('lastName', 'Doe', false);

$stdInterfacer = new StdObjectInterfacer();

$stdObject = $stdInterfacer->export($person, [Interfacer::ONLY_UPDATED_VALUES => true]);
echo $stdInterfacer->toString($stdObject);
// output '{"id":1,"firstName":"John"}'
// lastName is not exported, and id is exported even if it's not updated

propertiesFilters

Summary

Define a filter of values that will be exported.

Description


type	array
default	null
availability	export
constant	`Interfacer::PROPERTIES_FILTERS`

Example

$person = new Object('person');
$person->setValue('id', 1);
$person->setValue('firstName', 'John');
$person->setValue('lastName', 'Doe');

$tattooOne = new Object('tattoo');
$tattooOne->setValue('type', 'dragon');
$tattooOne->setValue('location', 'back');

$tattooTwo = new Object('tattoo');
$tattooTwo->setValue('type', 'flower');
$tattooTwo->setValue('location', 'arm');

$tattoos = $person->initValue('tattoos');
$tattoos->pushValue($tattooOne);
$tattoos->pushValue($tattooTwo);

$stdInterfacer = new StdObjectInterfacer();
$filter = [
    'person' => ['id', 'tattoos'],
    'tattoo' => ['type'],
];

$stdObject = $stdInterfacer->export($person, [Interfacer::PROPERTIES_FILTERS => $filter]);
echo $stdInterfacer->toString($stdObject);
// output '{"id":1,"tattoos":[{"type":"dragon"},{"type":"flower"}]}'

flattenValues

Summary

Define if interfaced complex values (object or array) are flattened (stringified).
This preference is used typically during sql serialization.

Description


type	boolean
default	false
availability	export and import
constant	`Interfacer::FLATTEN_VALUES`

Example

$person = new Object('person');
$person->setValue('id', 1);
$person->setValue('firstName', 'John');

$tattooOne = new Object('tattoo');
$tattooOne->setValue('type', 'dragon');
$tattooOne->setValue('location', 'arm');

$tattoos = $person->initValue('tattoos');
$tattoos->pushValue($tattooOne);

$stdInterfacer = new StdObjectInterfacer();

$stdObject = $stdInterfacer->export($person, [Interfacer::FLATTEN_VALUES => true]);
echo $stdInterfacer->toString($stdObject);
// output '{"id":1,"firstName":"John","tattoos":"[{\"type\":\"dragon\",\"location\":\"arm\"}]"}'

exportMainForeignObjects

Summary

Define if foreign values with a main model have to be exported aside to current exported object.
exported foreign values are stored in interfacer and can be retrieved with getter getMainForeignObjects().

exportedObjects = $interfacer->getMainForeignObjects();

Description


type	boolean
default	false
availability	export
constant	`Interfacer::EXPORT_MAIN_FOREIGN_OBJECTS`

Example

$person = new Object('person');
$person->setValue('id', 1);
$person->setValue('firstName', 'John');

$mother = new Object('person');
$mother->setValue('id', 2);
$mother->setValue('firstName', 'Jane');

$person->setValue('mother', $mother);

$stdInterfacer = new StdObjectInterfacer();

$stdObject = $stdInterfacer->export($person, [Interfacer::EXPORT_MAIN_FOREIGN_OBJECTS => true]);
echo $stdInterfacer->toString($stdObject);
// output '{"id":1,"firstName":"John","mother":2}'

echo json_encode($stdInterfacer->getMainForeignObjects());
// output '{"person":{"2":{"id":2,"firstName":"Jane"}}}'

flagValuesAsUpdated

Summary

Define if imported values will be flagged as updated.

Description


type	boolean
default	true
availability	import
constant	`Interfacer::FLAG_VALUES_AS_UPDATED`

Example

$stdInterfacer = new StdObjectInterfacer();

$stdObject = json_decode('{"id":1,"firstName":"John","tattoos":[{"type":"dragon","location":"arm"}]}');
$person = $stdInterfacer->import($stdObject);
echo $person->isUpdatedValue('firstName'); // output true
echo $person->getValue('tattoos')->getValue(0)->isUpdatedValue('type'); // output true

$stdObject = json_decode('{"id":2,"firstName":"Jane","tattoos":[{"type":"dragon","location":"arm"}]}');
$person = $stdInterfacer->import($stdObject, [Interfacer::FLAG_VALUES_AS_UPDATED => false]);
echo $person->isUpdatedValue('firstName'); // output false
echo $person->getValue('tattoos')->getValue(0)->isUpdatedValue('type'); // output false

flagObjectAsLoaded

Summary

Define if imported object will be flagged as loaded.
In fact the real name of this preference in source code is flagObjectAsUpdated but this is a mistake, it will be updated in new version. If you use constant you don't have to take care of it.

Description


type	boolean
default	true
availability	import
constant	`Interfacer::FLAG_OBJECT_AS_LOADED`

Example

$stdInterfacer = new StdObjectInterfacer();

$stdObject = json_decode('{"id":1,"firstName":"John","tattoos":[{"type":"dragon","location":"arm"}]}');
$person = $stdInterfacer->import($stdObject);
echo $person->isLoaded(); // output true
echo $person->getValue('tattoos')->getValue(0)->isLoaded(); // output true

$stdObject = json_decode('{"id":2,"firstName":"Jane","tattoos":[{"type":"dragon","location":"arm"}]}');
$person = $stdInterfacer->import($stdObject, [Interfacer::FLAG_OBJECT_AS_LOADED => false]);
echo $person->isLoaded(); // output false
echo $person->getValue('tattoos')->getValue(0)->isLoaded(); // output true

mergeType

Summary

Define the merge type used during import. This preference is available only via MainModel::import() or Interfacer::import(), not via comhon object ComhonObject::fill().
There are three merge type :

merge :
If imported object has id, try to find instance of comhon object with same id in MainObjectCollection.
- If found, get existing comhon object and merge imported values with existing values.
- otherwise create new instance and populate it.
overwrite :
If imported object has id, try to find instance of comhon object with same id in MainObjectCollection.
- If found, get existing comhon object, delete existing values and populate it.
- otherwise create new instance and populate it.
no merge :
Create new instance and populate it even if instance with same id already exists in MainObjectCollection. Use carefully this preference, it's often a bad idea to have different instances of objects with same id. But in some very specific case it might be helpfull.

Description


type	enumeration (1,2,3) (`Interfacer::MERGE`,`Interfacer::OVERWRITE`,`Interfacer::NO_MERGE`)
default	`Interfacer::MERGE`
availability	import
constant	`Interfacer::MERGE_TYPE`

Example

$person = new Object('person');
$person->setValue('id', 1); // object is added to MainObjectCollection
$person->setValue('firstName', 'John');

$stdObject = json_decode('{"id":1,"lastName":"Doe"}');

$stdInterfacer = new StdObjectInterfacer();

$importedPerson = $stdInterfacer->import($stdObject, [Interfacer::MERGE_TYPE => Interfacer::MERGE]);
echo $importedPerson->getValue('firstName'); // output 'John'
echo $importedPerson->getValue('lastName'); // output 'Doe'
echo $person === $importedPerson ? 'same instance' : 'different instance';
// output 'same instance'

$importedPerson = $stdInterfacer->import($stdObject, [Interfacer::MERGE_TYPE => Interfacer::OVERWRITE]);
echo $importedPerson->hasValue('firstName'); // output false
echo $importedPerson->getValue('lastName'); // output 'Doe'
echo $person === $importedPerson ? 'same instance' : 'different instance';
// output 'same instance'

$importedPerson = $stdInterfacer->import($stdObject, [Interfacer::MERGE_TYPE => Interfacer::NO_MERGE]);
echo $importedPerson->hasValue('firstName'); // output false
echo $importedPerson->getValue('lastName'); // output 'Doe'
echo $person === $importedPerson ? 'same instance' : 'different instance';
// output 'different instance'

TODO explain inherithance in object collection, woman registered, person can retrieve object (with same instance).

Conversely register person, can retreive with woman if specified in parameters

TODO inheritance key + foreign inheritance key

TODO cast

Database time zone

For most (all?) SGBD connection you can define your time zone. to set a specific time zone for your connection you must specify it in file config.json (by default time zone connection is UTC).
Whatever is your database time zone you don't have to take care of it, serialization/deserialization will automatically affect good time zone to all your values with type dateTime.

Object management

Table of contents

Object Collection

Main Object Collection

Object serialization

Specific case for sql database

Your table has an incremental id

Your table doesn't have an incremental id

Object deserialization

Object interfacing

import

Foreign properties import

export

Foreign properties export

Interfacing preferences

privateContext

Summary

Description

Example

serialContext

Summary

Description

Example

dateTimeFormat

Summary

Description

Example

dateTimeZone

Summary

Description

Example

updatedValueOnly

Summary

Description

Example

propertiesFilters

Summary

Description

Example

flattenValues

Summary

Description

Example

exportMainForeignObjects

Summary

Description

Example

flagValuesAsUpdated

Summary

Description

Example

flagObjectAsLoaded

Summary

Description

Example

mergeType

Summary

Description

Example

TODO explain inherithance in object collection, woman registered, person can retrieve object (with same instance).

Conversely register person, can retreive with woman if specified in parameters

TODO inheritance key + foreign inheritance key

TODO cast

Database time zone

Uh oh!

Uh oh!

Uh oh!

Uh oh!

Uh oh!

Uh oh!

Uh oh!

Uh oh!

Uh oh!

Uh oh!

Uh oh!

Clone this wiki locally