ArrayList
class ArrayList extends ViewableData implements SS_List, SS_Filterable, SS_Sortable, SS_Limitable (View source)
A list object that wraps around an array of objects or arrays.
Note that (like DataLists), the implementations of the methods from SS_Filterable, SS_Sortable and SS_Limitable return a new instance of ArrayList, rather than modifying the existing instance.
For easy reference, methods that operate in this way are:
- limit
- reverse
- sort
- filter
- exclude
Properties
static private array | $extensions | An array of extension names and parameters to be applied to this object upon construction. |
from SS_Object |
string | $class | from SS_Object | |
static private array | $casting | An array of objects to cast certain fields to. This is set up as an array in the format: |
from ViewableData |
static private string | $default_cast | The default object to cast scalar fields to if casting information is not specified, and casting to an object is required. |
from ViewableData |
Methods
Get a configuration accessor for this class. Short hand for Config::inst()->get($this->class, .....).
An implementation of the factory method, allows you to create an instance of a class
Creates a class instance by the "singleton" design pattern.
Create an object from a string representation. It treats it as a PHP constructor without the 'new' keyword. It also manages to construct the object without the use of eval().
Parses a class-spec, such as "Versioned('Stage','Live')", as passed to create_from_string().
Similar to {@link Object::create()}, except that classes are only overloaded if you set the $strong parameter to TRUE when using {@link Object::useCustomClass()}
This class allows you to overload classes with other classes when they are constructed using the factory method {@link Object::create()}
If a class has been overloaded, get the class name it has been overloaded with - otherwise return the class name
Get the value of a static property of a class, even in that property is declared protected (but not private), without any inheritance, merging or parent lookup if it doesn't exist on the given class.
Return TRUE if a class has a specified extension.
Add an extension to a specific class.
No description
No description
Attemps to locate and call a method dynamically added to a class at runtime if a default cannot be located
Return the names of all the methods available on this object
Returns true if this list has items
Check if this class is an instance of a specific class, or has that class as one of its parents
Calls a method if available on both this object and all applied {@link Extensions}, and then attempts to merge all results into an array
Run the given function on all of this object's extensions. Note that this method originally returned void, so if you wanted to return results, you're hosed
Get an extension instance attached to this object by name.
Returns TRUE if this object instance has a specific extension applied in {@link $extension_instances}. Extension instances are initialized at constructor time, meaning if you use {@link add_extension()} afterwards, the added extension will just be added to new instances of the extended class. Use the static method {@link has_extension()} to check if a class (not an instance) has a specific extension.
Get all extension instances for this specific object instance.
Cache the results of an instance method in this object to a file, or if it is already cache return the cached results
Clears the cache for the given cacheToFile call
Converts a field spec into an object creator. For example: "Int" becomes "new Int($fieldName);" and "Varchar(50)" becomes "new Varchar($fieldName, 50);".
Convert a field schema (e.g. "Varchar(50)") into a casting object creator array that contains both a className and castingHelper constructor code. See {@link castingObjectCreator} for more information about the constructor.
Check if a field exists on this object or its failover.
Get the value of a property/field on this object. This will check if a method called get{$property} exists, then check if a field is available using {@link ViewableData::getField()}, then fall back on a failover object.
Set a property/field on this object. This will check for the existence of a method called set{$property}, then use the {@link ViewableData::setField()} method.
Set a failover object to attempt to get data from if it is not present on this object.
Check if a field exists on this object. This should be overloaded in child classes.
Get the value of a field on this object. This should be overloaded in child classes.
Set a field on this object. This should be overloaded in child classes.
Add methods from the {@link ViewableData::$failover} object, as well as wrapping any methods prefixed with an underscore into a {@link ViewableData::cachedCall()}.
Method to facilitate deprecation of underscore-prefixed methods automatically being cached.
Merge some arbitrary data in with this object. This method returns a {@link ViewableData_Customised} instance with references to both this and the new custom data.
Get the class a field on this object would be casted to, as well as the casting helper for casting a field to an object (see {@link ViewableData::castingHelper()} for information on casting helpers).
Return the "casting helper" (a piece of PHP code that when evaluated creates a casted value object) for a field on this object.
Get the class name a field on this object will be casted to
Return the string-format type for the given field.
Save the casting cache for this object (including data from any failovers) into a variable
Render this object into the template, and get the result as a string. You can pass one of the following as the $template parameter:
- a template name (e.g. Page)
- an array of possible template names - the first valid one will be used
- an SSViewer instance
Get the value of a field on this object, automatically inserting the value into any available casting objects that have been specified.
A simple wrapper around {@link ViewableData::obj()} that automatically caches the result so it can be used again without re-running the method.
Checks if a given method/field has a valid value. If the result is an object, this will return the result of the exists method, otherwise will check if the result is not just an empty paragraph tag.
Get the string value of a field on this object that has been suitable escaped to be inserted directly into a template.
Return the value of the field without any escaping being applied.
Return the value of a field in an SQL-safe format.
Return the value of a field in a JavaScript-save format.
Return the value of a field escaped suitable to be inserted into an XML node attribute.
Returns an Iterator for this ArrayList.
When rendering some objects it is necessary to iterate over the object being rendered, to do this, you need access to itself.
Return the directory if the current active theme (relative to the site root).
Get part of the current classes ancestry to be used as a CSS class.
Return debug information about this object that can be rendered into a template
Return the class of items in this list, by looking at the first item inside it.
Return the number of items in this list
Return an array of the actual items that this ArrayList contains.
Walks the list using the specified callback
No description
Return this list as an array and every object it as an sub array as well
Get a sub-range of this dataobjectset as an array
Add this $item into this list
Remove this item from this list
Replaces an item in this list with another item.
Merges with another array or list by pushing all the items in it onto the end of this list.
Removes items from this list which have a duplicate value for a certain field. This is especially useful when combining lists.
Pushes an item onto the end of this list.
Pops the last element off the end of the list and returns it.
Add an item onto the beginning of the list.
Shifts the item off the beginning of the list and returns it.
Returns the first item in the list
Returns the last item in the list
Returns a map of this list
Find the first item of this list where the given key = value
Returns an array of a single field value for all items in the list.
You can always sort a ArrayList
Reverses an {@link ArrayList}
Sorts this list by one or more fields. You can either pass in a single field name and direction, or a map of field names to sort directions.
Returns true if the given column can be used to filter the records.
Filter the list to include items with these charactaristics
Return a copy of this list which contains items matching any of these charactaristics.
No description
No description
Exclude the list to not contain items with these charactaristics
Returns whether an item with $key exists
Returns item stored in list with index $key
Set an item with the key in $key
Unset an item with the key in $key
Details
static Config_ForClass|null
config()
Get a configuration accessor for this class. Short hand for Config::inst()->get($this->class, .....).
static SS_Object
create()
An implementation of the factory method, allows you to create an instance of a class
This method first for strong class overloads (singletons & DB interaction), then custom class overloads. If an overload is found, an instance of this is returned rather than the original class. To overload a class, use {@link Object::useCustomClass()}
This can be called in one of two ways - either calling via the class directly, or calling on Object and passing the class name as the first parameter. The following are equivalent: $list = DataList::create('SiteTree'); $list = SiteTree::get();
static SS_Object
singleton()
Creates a class instance by the "singleton" design pattern.
It will always return the same instance for this class, which can be used for performance reasons and as a simple way to access instance methods which don't rely on instance data (e.g. the custom SilverStripe static handling).
static
create_from_string($classSpec, $firstArg = null)
Create an object from a string representation. It treats it as a PHP constructor without the 'new' keyword. It also manages to construct the object without the use of eval().
Construction itself is done with Object::create(), so that Object::useCustomClass() calls are respected.
Object::create_from_string("Versioned('Stage','Live')")
will return the result of
Versioned::create('Stage', 'Live);
It is designed for simple, clonable objects. The first time this method is called for a given string it is cached, and clones of that object are returned.
If you pass the $firstArg argument, this will be prepended to the constructor arguments. It's impossible to pass null as the firstArg argument.
Object::create_from_string("Varchar(50)", "MyField")
will return the result of
Vachar::create('MyField', '50');
Arguments are always strings, although this is a quirk of the current implementation rather than something that can be relied upon.
static
parse_class_spec($classSpec)
Parses a class-spec, such as "Versioned('Stage','Live')", as passed to create_from_string().
Returns a 2-elemnent array, with classname and arguments
static SS_Object
strong_create()
Similar to {@link Object::create()}, except that classes are only overloaded if you set the $strong parameter to TRUE when using {@link Object::useCustomClass()}
static
useCustomClass(string $oldClass, string $newClass, bool $strong = false)
This class allows you to overload classes with other classes when they are constructed using the factory method {@link Object::create()}
static string
getCustomClass(string $class)
If a class has been overloaded, get the class name it has been overloaded with - otherwise return the class name
static any
static_lookup($class, $name, null $default = null)
Get the value of a static property of a class, even in that property is declared protected (but not private), without any inheritance, merging or parent lookup if it doesn't exist on the given class.
static
get_static($class, $name, $uncached = false)
deprecated
deprecated
static
set_static($class, $name, $value)
deprecated
deprecated
static
uninherited_static($class, $name, $uncached = false)
deprecated
deprecated
static
combined_static($class, $name, $ceiling = false)
deprecated
deprecated
static
addStaticVars($class, $properties, $replace = false)
deprecated
deprecated
static
add_static_var($class, $name, $value, $replace = false)
deprecated
deprecated
static
has_extension(string $classOrExtension, string $requiredExtension = null, bool $strict = false)
Return TRUE if a class has a specified extension.
This supports backwards-compatible format (static Object::has_extension($requiredExtension)) and new format ($object->has_extension($class, $requiredExtension))
static
add_extension(string $classOrExtension, string $extension = null)
Add an extension to a specific class.
The preferred method for adding extensions is through YAML config, since it avoids autoloading the class, and is easier to override in more specific configurations.
As an alternative, extensions can be added to a specific class directly in the {@link Object::$extensions} array. See {@link SiteTree::$extensions} for examples. Keep in mind that the extension will only be applied to new instances, not existing ones (including all instances created through {@link singleton()}).
static
remove_extension(string $extension)
Remove an extension from a class.
Keep in mind that this won't revert any datamodel additions of the extension at runtime, unless its used before the schema building kicks in (in your _config.php). Doesn't remove the extension from any {@link Object} instances which are already created, but will have an effect on new extensions. Clears any previously created singletons through {@link singleton()} to avoid side-effects from stale extension information.
static array
get_extensions(string $class, bool $includeArgumentString = false)
static
get_extra_config_sources($class = null)
__construct(array $items = array())
mixed
__call(string $method, array $arguments)
Attemps to locate and call a method dynamically added to a class at runtime if a default cannot be located
You can add extra methods to a class using {@link Extensions}, {@link Object::createMethod()} or {@link Object::addWrapperMethod()}
bool
hasMethod(string $method)
Return TRUE if a method exists on this object
This should be used rather than PHP's inbuild method_exists() as it takes into account methods added via extensions
array
allMethodNames(bool $custom = false)
Return the names of all the methods available on this object
stat($name, $uncached = false)
set_stat($name, $value)
uninherited($name)
bool
exists()
Returns true if this list has items
string
parentClass()
bool
is_a(string $class)
Check if this class is an instance of a specific class, or has that class as one of its parents
string
__toString()
mixed
invokeWithExtensions(string $method, mixed $argument = null)
Calls a method if available on both this object and all applied {@link Extensions}, and then attempts to merge all results into an array
array
extend(string $method, mixed $a1 = null, mixed $a2 = null, mixed $a3 = null, mixed $a4 = null, mixed $a5 = null, mixed $a6 = null, mixed $a7 = null)
Run the given function on all of this object's extensions. Note that this method originally returned void, so if you wanted to return results, you're hosed
Currently returns an array, with an index resulting every time the function is called. Only adds returns if they're not NULL, to avoid bogus results from methods just defined on the parent extension. This is important for permission-checks through extend, as they use min() to determine if any of the returns is FALSE. As min() doesn't do type checking, an included NULL return would fail the permission checks.
The extension methods are defined during {@link __construct()} in {@link defineMethods()}.
Extension
getExtensionInstance(string $extension)
Get an extension instance attached to this object by name.
bool
hasExtension(string $extension)
Returns TRUE if this object instance has a specific extension applied in {@link $extension_instances}. Extension instances are initialized at constructor time, meaning if you use {@link add_extension()} afterwards, the added extension will just be added to new instances of the extended class. Use the static method {@link has_extension()} to check if a class (not an instance) has a specific extension.
Caution: Don't use singleton(
array
getExtensionInstances()
Get all extension instances for this specific object instance.
See {@link get_extensions()} to get all applied extension classes for this class (not the instance).
mixed
cacheToFile(string $method, int $lifetime = 3600, string $ID = false, array $arguments = array())
Cache the results of an instance method in this object to a file, or if it is already cache return the cached results
clearCache($method, $ID = false, $arguments = array())
Clears the cache for the given cacheToFile call
static string
castingObjectCreator(string $fieldSchema)
Converts a field spec into an object creator. For example: "Int" becomes "new Int($fieldName);" and "Varchar(50)" becomes "new Varchar($fieldName, 50);".
static array
castingObjectCreatorPair(string $fieldSchema)
Convert a field schema (e.g. "Varchar(50)") into a casting object creator array that contains both a className and castingHelper constructor code. See {@link castingObjectCreator} for more information about the constructor.
bool
__isset(string $property)
Check if a field exists on this object or its failover.
mixed
__get(string $property)
Get the value of a property/field on this object. This will check if a method called get{$property} exists, then check if a field is available using {@link ViewableData::getField()}, then fall back on a failover object.
__set(string $property, mixed $value)
Set a property/field on this object. This will check for the existence of a method called set{$property}, then use the {@link ViewableData::setField()} method.
setFailover(ViewableData $failover)
Set a failover object to attempt to get data from if it is not present on this object.
ViewableData|null
getFailover()
Get the current failover object if set
bool
hasField(string $field)
Check if a field exists on this object. This should be overloaded in child classes.
mixed
getField(string $field)
Get the value of a field on this object. This should be overloaded in child classes.
setField(string $field, mixed $value)
Set a field on this object. This should be overloaded in child classes.
defineMethods()
Add methods from the {@link ViewableData::$failover} object, as well as wrapping any methods prefixed with an underscore into a {@link ViewableData::cachedCall()}.
unknown
deprecatedCachedCall($method, $args = null, string $identifier = null)
Method to facilitate deprecation of underscore-prefixed methods automatically being cached.
ViewableData_Customised
customise(array|ViewableData $data)
Merge some arbitrary data in with this object. This method returns a {@link ViewableData_Customised} instance with references to both this and the new custom data.
Note that any fields you specify will take precedence over the fields on this object.
ViewableData
getCustomisedObj()
setCustomisedObj(ViewableData $object)
array
castingHelperPair(string $field)
Get the class a field on this object would be casted to, as well as the casting helper for casting a field to an object (see {@link ViewableData::castingHelper()} for information on casting helpers).
The returned array contains two keys:
- className: the class the field would be casted to (e.g. "Varchar")
- castingHelper: the casting helper for casting the field (e.g. "return new Varchar($fieldName)")
string
castingHelper(string $field)
Return the "casting helper" (a piece of PHP code that when evaluated creates a casted value object) for a field on this object.
string
castingClass(string $field)
Get the class name a field on this object will be casted to
string
escapeTypeForField(string $field)
Return the string-format type for the given field.
buildCastingCache(reference $cache)
Save the casting cache for this object (including data from any failovers) into a variable
HTMLText
renderWith(string|array|SSViewer $template, array $customFields = null)
Render this object into the template, and get the result as a string. You can pass one of the following as the $template parameter:
- a template name (e.g. Page)
- an array of possible template names - the first valid one will be used
- an SSViewer instance
obj(string $fieldName, array $arguments = null, bool $forceReturnedObject = true, bool $cache = false, string $cacheName = null)
Get the value of a field on this object, automatically inserting the value into any available casting objects that have been specified.
cachedCall(string $field, array $arguments = null, string $identifier = null)
A simple wrapper around {@link ViewableData::obj()} that automatically caches the result so it can be used again without re-running the method.
bool
hasValue(string $field, array $arguments = null, bool $cache = true)
Checks if a given method/field has a valid value. If the result is an object, this will return the result of the exists method, otherwise will check if the result is not just an empty paragraph tag.
XML_val($field, $arguments = null, $cache = false)
Get the string value of a field on this object that has been suitable escaped to be inserted directly into a template.
RAW_val($field, $arguments = null, $cache = true)
Return the value of the field without any escaping being applied.
SQL_val($field, $arguments = null, $cache = true)
Return the value of a field in an SQL-safe format.
JS_val($field, $arguments = null, $cache = true)
Return the value of a field in a JavaScript-save format.
ATT_val($field, $arguments = null, $cache = true)
Return the value of a field escaped suitable to be inserted into an XML node attribute.
array
getXMLValues($fields)
Get an array of XML-escaped values by field name
ArrayIterator
getIterator()
Returns an Iterator for this ArrayList.
This function allows you to use ArrayList in foreach loops
ViewableData
Me()
When rendering some objects it is necessary to iterate over the object being rendered, to do this, you need access to itself.
string
ThemeDir(string $subtheme = false)
Return the directory if the current active theme (relative to the site root).
This method is useful for things such as accessing theme images from your template without hardcoding the theme
page - e.g. .
This method should only be used when a theme is currently active. However, it will fall over to the current project directory.
string
CSSClasses(string $stopAtClass = 'ViewableData')
Get part of the current classes ancestry to be used as a CSS class.
This method returns an escaped string of CSS classes representing the current classes ancestry until it hits a stop point - e.g. "Page DataObject ViewableData".
ViewableData_Debugger
Debug()
Return debug information about this object that can be rendered into a template
dataClass()
Return the class of items in this list, by looking at the first item inside it.
int
count()
Return the number of items in this list
array
toArray()
Return an array of the actual items that this ArrayList contains.
mixed
each(callable $callback)
Walks the list using the specified callback
debug()
array
toNestedArray()
Return this list as an array and every object it as an sub array as well
SS_Limitable
limit(int $length, $offset = 0)
Get a sub-range of this dataobjectset as an array
add(mixed $item)
Add this $item into this list
remove(mixed $item)
Remove this item from this list
replace(array|object $item, array|object $with)
Replaces an item in this list with another item.
merge(array|object $with)
Merges with another array or list by pushing all the items in it onto the end of this list.
removeDuplicates(string $field = 'ID')
Removes items from this list which have a duplicate value for a certain field. This is especially useful when combining lists.
push(array|object $item)
Pushes an item onto the end of this list.
array|object
pop()
Pops the last element off the end of the list and returns it.
unshift(array|object $item)
Add an item onto the beginning of the list.
array|object
shift()
Shifts the item off the beginning of the list and returns it.
mixed
first()
Returns the first item in the list
mixed
last()
Returns the last item in the list
array
map(string $keyfield = 'ID', string $titlefield = 'Title')
Returns a map of this list
mixed
find(string $key, mixed $value)
Find the first item of this list where the given key = value
array
column(string $colName = 'ID')
Returns an array of a single field value for all items in the list.
bool
canSortBy(string $by)
You can always sort a ArrayList
SS_Sortable
reverse()
Reverses an {@link ArrayList}
SS_Sortable
sort()
Sorts this list by one or more fields. You can either pass in a single field name and direction, or a map of field names to sort directions.
Note that columns may be double quoted as per ANSI sql standard
bool
canFilterBy(string $by)
Returns true if the given column can be used to filter the records.
It works by checking the fields available in the first record of the list.
SS_Filterable
filter()
Filter the list to include items with these charactaristics
DataList
filterAny()
Return a copy of this list which contains items matching any of these charactaristics.
ArrayList
byIDs(array $ids)
Filter this list to only contain the given Primary IDs
byID($id)
SS_Filterable
filterByCallback($callback)
SS_Filterable
exclude()
Exclude the list to not contain items with these charactaristics
bool
offsetExists($offset)
Returns whether an item with $key exists
DataObject
offsetGet($offset)
Returns item stored in list with index $key
offsetSet($offset, mixed $value)
Set an item with the key in $key
offsetUnset($offset)
Unset an item with the key in $key