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DataSet

Implements DumpableInterface, ArrayAccess, Countable, Iterator

DataSet is a collection class that allows the developer to operate on a set of DataObject objects as if they were in a typical PHP array.

since

1.0
package

Joomla Framework

Methods

__call

The magic call method is used to call object methods using the iterator.

__call(string method, array arguments = array()) : array

Example: $array = $objectList->foo('bar');

The object list will iterate over its objects and see if each object has a callable 'foo' method. If so, it will pass the argument list and assemble any return values. If an object does not have a callable method no return value is recorded. The keys of the objects and the result array are maintained.

since

1.0

Arguments

method

stringThe name of the method called.

arguments

arrayThe arguments of the method called.

Response

arrayAn array of values returned by the methods called on the objects in the data set.

__construct

The class constructor.

__construct(\Joomla\Data\DataObject[] objects = array()) : mixed
since

1.0
throws

\InvalidArgumentExceptionif an object is not an instance of Data\Object.

Arguments

objects

\Joomla\Data\DataObject[]An array of DataObject objects to bind to the data set.

Response

mixed

__get

The magic get method is used to get a list of properties from the objects in the data set.

__get(string property) : array

Example: $array = $dataSet->foo;

This will return a column of the values of the 'foo' property in all the objects (or values determined by custom property setters in the individual Data\Object's). The result array will contain an entry for each object in the list (compared to __call which may not). The keys of the objects and the result array are maintained.

since

1.0

Arguments

property

stringThe name of the data property.

Response

arrayAn associative array of the values.

__isset

The magic isset method is used to check the state of an object property using the iterator.

__isset(string property) : bool

Example: $array = isset($objectList->foo);

since

1.0

Arguments

property

stringThe name of the property.

Response

boolTrue if the property is set in any of the objects in the data set.

__set

The magic set method is used to set an object property using the iterator.

__set(string property, mixed value) : void

Example: $objectList->foo = 'bar';

This will set the 'foo' property to 'bar' in all of the objects (or a value determined by custom property setters in the Data\Object).

since

1.0

Arguments

property

stringThe name of the property.

value

mixedThe value to give the data property.

__unset

The magic unset method is used to unset an object property using the iterator.

__unset(string property) : void

Example: unset($objectList->foo);

This will unset all of the 'foo' properties in the list of Data\Object's.

since

1.0

Arguments

property

stringThe name of the property.

_initialise

Initialises the list with an array of objects.

_initialise(array input = array()) : void
since

1.0
throws

\InvalidArgumentExceptionif an object is not an instance of Data\DataObject.

Arguments

input

arrayAn array of objects.

clear

Clears the objects in the data set.

clear() : \Joomla\Data\DataSet
since

1.0

Response

\Joomla\Data\DataSetReturns itself to allow chaining.

count

Gets the number of data objects in the set.

count() : int
since

1.0

Response

intThe number of objects.

current

Get the current data object in the set.

current() : \Joomla\Data\DataObject
since

1.0

Response

\Joomla\Data\DataObjectThe current object, or false if the array is empty or the pointer is beyond the end of the elements.

dump

Dumps the data object in the set, recursively if appropriate.

dump(int depth = 3, \SplObjectStorage dumped = null) : array
see DataObject::dump()
since

1.0

Arguments

depth

intThe maximum depth of recursion (default = 3). For example, a depth of 0 will return a stdClass with all the properties in native form. A depth of 1 will recurse into the first level of properties only.

dumped

\SplObjectStorageAn array of already serialized objects that is used to avoid infinite loops.

Response

arrayAn associative array of the data objects in the set, dumped as a simple PHP stdClass object.

getObjectsKeys

Gets an array of keys, existing in objects

getObjectsKeys(string type = 'all') : array
since

1.2.0
throws

\InvalidArgumentException

Arguments

type

stringSelection type 'all' or 'common'

Response

arrayArray of keys

jsonSerialize

Gets the data set in a form that can be serialised to JSON format.

jsonSerialize(mixed serialized = null) : array

Note that this method will not return an associative array, otherwise it would be encoded into an object. JSON decoders do not consistently maintain the order of associative keys, whereas they do maintain the order of arrays.

since

1.0

Arguments

serialized

mixedAn array of objects that have already been serialized that is used to infinite loops (null on first call).

Response

arrayAn array that can be serialised by json_encode().

key

Gets the key of the current object in the iterator.

key() : scalar
since

1.0

Response

scalarThe object key on success; null on failure.

keys

Gets the array of keys for all the objects in the iterator (emulates array_keys).

keys() : array
since

1.0

Response

arrayThe array of keys

next

Advances the iterator to the next object in the iterator.

next() : void
since

1.0

offsetExists

Checks whether an offset exists in the iterator.

offsetExists(mixed offset) : bool
since

1.0

Arguments

offset

mixedThe object offset.

Response

boolTrue if the object exists, false otherwise.

offsetGet

Gets an offset in the iterator.

offsetGet(mixed offset) : \Joomla\Data\DataObject
since

1.0

Arguments

offset

mixedThe object offset.

Response

\Joomla\Data\DataObjectThe object if it exists, null otherwise.

offsetSet

Sets an offset in the iterator.

offsetSet(mixed offset, \Joomla\Data\DataObject object) : void
since

1.0
throws

\InvalidArgumentExceptionif an object is not an instance of Data\Object.

Arguments

offset

mixedThe object offset.

object

\Joomla\Data\DataObjectThe object object.

offsetUnset

Unsets an offset in the iterator.

offsetUnset(mixed offset) : void
since

1.0

Arguments

offset

mixedThe object offset.

rewind

Rewinds the iterator to the first object.

rewind() : void
since

1.0

toArray

Gets all objects as an array

toArray(bool associative = true, string k = null) : array
since

1.2.0

Arguments

associative

boolOption to set return mode: associative or numeric array.

k

stringUnlimited optional property names to extract from objects.

Response

arrayReturns an array according to defined options.

valid

Validates the iterator.

valid() : bool
since

1.0

Response

boolTrue if valid, false otherwise.

walk

Applies a function to every object in the set (emulates array_walk).

walk(callable funcname) : bool
since

1.2.0
throws

\InvalidArgumentException

Arguments

funcname

callableCallback function.

Response

bool

Properties

current

The current position of the iterator.

since

1.0

Type(s)

int

objects

The iterator objects.

since

1.0

Type(s)

\Joomla\Data\DataObject[]
  • \ Joomla
  • \ Data
  • \ DataSet