Yahoo Mail File Storage
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Class YAHOO.util.Storage
The Storage class is an HTML 5 storage API clone, used to wrap individual storage implementations with a common API.
Constructor
YAHOO.util.Storage ( location , conf )

Parameters:
    location <String> Required. The storage location.
    conf <Object> Required. A configuration object.

Properties
_cfg - protected {Object}
The configuration of the engine.
_location - protected {String}
The location for this instance.
_name - protected {String}
The name of this engine.
CE_CHANGE - {String}
The event name for when the storage item has changed.
CE_READY - {String}
The event name for when the storage item is ready.
DELIMITER - {String}
The delimiter uesed between the data type and the data.
isReady - protected {String}
This engine singleton has been initialized already.
length - {Number}
The current length of the keys.
Methods
_clear
protected void _clear ( )
Implementation of the clear login; should be overwritten by storage engine.

Returns: void

_createValue
protected void _createValue ( s )
Converts the object into a string, with meta data (type), so it can be restored later.

Parameters:
    s <Object> Required. An object to store.

Returns: void

_getItem
protected String|NULL _getItem ( key )
Implementation of the getItem login; should be overwritten by storage engine.

Parameters:
    key <String> Required. The key used to reference this value.

Returns: String|NULL
    The value stored at the provided key.

_getValue
protected void _getValue ( s )
Converts the stored value into its appropriate type.

Parameters:
    s <String> Required. The stored value.

Returns: void

_key
protected String|NULL _key ( index )
Implementation of the key logic; should be overwritten by storage engine.

Parameters:
    index <Number> Required. The index to retrieve (unsigned long in HTML 5 spec).

Returns: String|NULL
    Required. The key at the provided index (DOMString in HTML 5 spec).

_removeItem
protected void _removeItem ( key )
Implementation of the removeItem login; should be overwritten by storage engine.

Parameters:
    key <String> Required. The key to remove.

Returns: void

_setItem
protected Boolean _setItem ( key , data )
Implementation of the setItem login; should be overwritten by storage engine.

Parameters:
    key <String> Required. The key used to reference this value.
    data <Object> Required. The data to storage at key.

Returns: Boolean
    True when successful, false when size QUOTA exceeded.

clear
void clear ( )
Clears any existing key/value pairs.

Returns: void

getItem
String|NULL getItem ( key )
Fetches the data stored and the provided key.

Parameters:
    key <String> Required. The key used to reference this value (DOMString in HTML 5 spec).

Returns: String|NULL
    The value stored at the provided key (DOMString in HTML 5 spec).

getName
String getName ( )
Fetches the storage object's name; should be overwritten by storage engine.

Returns: String
    The name of the data storage object.

hasKey
Boolean hasKey ( key )
Tests if the key has been set (not in HTML 5 spec); should be overwritten by storage engine.

Parameters:
    key <String> Required. The key to search for.

Returns: Boolean
    True when key has been set.

key
String key ( index )
Retrieve the key stored at the provided index; should be overwritten by storage engine.

Parameters:
    index <Number> Required. The index to retrieve (unsigned long in HTML 5 spec).

Returns: String
    Required. The key at the provided index (DOMString in HTML 5 spec).

setItem
void setItem ( key )
Remove an item from the data storage.

Parameters:
    key <String> Required. The key to remove (DOMString in HTML 5 spec).

Returns: void
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