LibreOffice 24.2 SDK API Reference
Exported Interfaces | List of all members
ConfigurationProvider Service Referencepublished

manages one, or more, complete sets of configuration data and serves as a factory for objects that provide access to a subset of the configuration. More...


Inheritance diagram for ConfigurationProvider:
XMultiServiceFactory XComponent XInterface XInterface DefaultProvider

Exported Interfaces

interface com::sun::star::lang::XMultiServiceFactory
 allows creating access objects for specific views such as subsets and fragments of the configuration. More...
interface com::sun::star::lang::XComponent
 allows controlling or observing the lifetime of the configuration. More...

Additional Inherited Members

- Public Member Functions inherited from XMultiServiceFactory
com::sun::star::uno::XInterface createInstance ([in] string aServiceSpecifier) raises ( com::sun::star::uno::Exception )
 Creates an instance classified by the specified name. More...
com::sun::star::uno::XInterface createInstanceWithArguments ([in] string ServiceSpecifier, [in] sequence< any > Arguments) raises ( com::sun::star::uno::Exception )
 Creates an instance classified by the specified name and passes the arguments to that instance. More...
sequence< string > getAvailableServiceNames ()
 Provides the available names of the factory to be used to create instances. More...
- Public Member Functions inherited from XInterface
any queryInterface ([in] type aType)
 queries for a new interface to an existing UNO object. More...
void acquire ()
 increases the reference counter by one. More...
void release ()
 decreases the reference counter by one. More...
- Public Member Functions inherited from XComponent
void dispose ()
 The owner of an object calls this method to explicitly free all resources kept by this object and thus break cyclic references. More...
void addEventListener ([in] XEventListener xListener)
 adds an event listener to the object. More...
void removeEventListener ([in] XEventListener aListener)
 removes an event listener from the listener list. More...

Detailed Description

manages one, or more, complete sets of configuration data and serves as a factory for objects that provide access to a subset of the configuration.

An implementation is usually obtained from a com::sun::star::lang::ServiceManager. The arguments passed to com::sun::star::lang::XMultiComponentFactory::createInstanceWithArgumentsAndContext() select the configuration data source. Arguments must be provided as com::sun::star::beans::NamedValue or com::sun::star::beans::PropertyValue. If the parameters given are incomplete missing values are taken from the context or the environment. If an instance already exists for the given set of arguments, the existing instance may be reused. In particular, instantiating a provider without explicit arguments to access the default configuration data will always yield the same com::sun::star::configuration::DefaultProvider object.

Some arguments for com::sun::star::lang::XMultiServiceFactory::createInstanceWithArguments() may be given default values during creation of this service. In particular this applies to the parameters "Locale" and "EnableAsync".

Use theDefaultProvider instead.
Developers Guide
Writing UNO Components - Disable Commands - Disabling Commands at Runtime
Configuration Management - Connecting to a Data Source
Configuration Management - Object Model

Exported Interfaces

◆ com::sun::star::lang::XComponent

allows controlling or observing the lifetime of the configuration.

The owner of the provider may dispose of this object using com::sun::star::lang::XComponent::dispose(). Note that the default provider is owned by the com::sun::star::lang::ServiceManager and should not be disposed of by user code.

Views created by the provider generally refer to data that is managed by the provider. Therefore, disposing of the provider will cause all objects belonging to these views to be disposed of as well. This does not apply to snapshot views that have their own copy of the data, if available.

◆ com::sun::star::lang::XMultiServiceFactory

allows creating access objects for specific views such as subsets and fragments of the configuration.

The parameter aServiceSpecifier passed to com::sun::star::lang::XMultiServiceFactory::createInstanceWithArguments() supports at least the service specifiers "" and "".

Using the first of these service specifiers requests a read-only view of the configuration. The object that is created implements service ConfigurationAccess. To reflect its element role as root of the view, it implements service AccessRootElement.

Using the second form requests an updatable view of the configuration. The object that is created should implement service ConfigurationUpdateAccess. To reflect its element role which includes controlling updates for the whole view, it implements service UpdateRootElement.
If the root element of the view is marked read-only (as indicated by com::sun::star::beans::PropertyAttributes::READONLY), the implementation may either raise an exception or return a (read-only) ConfigurationAccess/AccessRootElement instead.

The arguments passed to com::sun::star::lang::XMultiServiceFactory::createInstanceWithArguments() in parameter aArguments specify the view of the configuration that should be created. That is, they determine the subset of elements that can be accessed starting from the returned object. Each element of the argument sequence should be a com::sun::star::beans::PropertyValue or a com::sun::star::beans::NamedValue, so that the parameters can be identified by name rather than by position.

What combinations of arguments are supported depends on the service name.

With both of the standard service-specifiers above, an implementation must accept a single argument named nodepath of type string. This argument must contain the absolute path to an element of the configuration. The view that is selected consists of the named element and all its descendants.

Other arguments can be used to control the behavior of the view. These are different for different implementations. Whether and how they are used may also depend on the configuration store and configuration that were selected when the provider was created.

An implementation must ignore unknown arguments.

Some parameters that are commonly supported are:

  • Selecting data into a view:

    "nodepath" : string
    specifies the location of the view root in the configuration.
    "depth" : short
    specifies that elements of the hierarchy that are more than the given number of nesting levels away from the root need not be included in the view.
    "locale" : com::sun::star::lang::Locale
    specifies the locale for which localized values should be retrieved.

    Example: In the hierarchy

     A - B1 - C1
    • B2 - C2 (localized: de, en, fr, ..) | | | - C3 - D1 | | | | | - D2 - E1 | | | - C4 - D3 - E2 - F1 | | | | | - F2 | | | - C5 |
    • B3 |
    • B4 - C6 - D4 - E3

    selecting a view with nodepath = "/A/B2", depth = 2 and locale = <Locale for en_US> would result in the tree fragment

    (A-) B2 - C2 (en)
    • C3 - D1 | | | - D2 (..) |
    • C4 - D3 (..) |
    • C5

  • Controlling cache behavior: (with providers that cache configuration data)
    "enableasync" : boolean

    controls how updates are handled in the cache. If TRUE, the cache may operate in write-back mode, where updates at first only affect the cache and are written to persistent storage at some later time. If FALSE, the cache must operate in write-through mode, where updates are written to persistent storage at once - that is before com::sun::star::util::XChangesBatch::commitChanges() returns.

    This parameter was formerly called "lazywrite". The old name should still be supported for compatibility.

    "nocache" : boolean

    This deprecated parameter specifies that data for the view is not taken from the cache, but read directly from storage. This may entail that future changes that become visible in the cache are not reflected in this view and that changes done through this view are not reflected in the cache.
    Use with caution !

    This parameter is not supported by all implementations and may be silently ignored !

com::sun::star::lang::XMultiServiceFactory::createInstance() may be unusable. Only an implementation that supports service names that can be used with no further arguments support this method. It should return the same result as if com::sun::star::lang::XMultiServiceFactory::createInstanceWithArguments() had been called using an empty sequence of arguments.

The documentation for this service was generated from the following file: