ContentProviderCollection

class kanzi::connect::ContentProviderCollection : public ContentProvider, private ContentProvider::Observer

A content provider type, that hosts other Content Providers.

Makes it possible to attach / detach content providers in to content database. Whenever this class receives a query, it automatically propagates it to all contained Content Providers and merges their results as one.

Public Types

typedef vector<ContentProviderSharedPtr> ContentProviderContainer

Container for content providers. Used to store child providers.

Public Functions

ContentProviderCollection(WorkQueueInterface *workQueue, AbstractServiceSharedPtr owningService)

Constructor.

virtual ~ContentProviderCollection()

void addContentProvider(ContentProviderSharedPtr provider, bool invalidate = true)

Adds content provider to collection.

Parameters

• provider: Content provider to add.

• invalidate: If true, invalidates the whole collection. If false, does nothing.

ContentProviderContainer::const_iterator beginProviders() const

Allows to iterate all contained providers.

Return

The beginning of the container.

ContentProviderContainer::const_iterator endProviders() const

Allows to iterate all contained providers.

Return

The end of the container.

virtual size_t getSubProviderCount () KZ_OVERRIDE

See

ContentProvider::getSubProviderCount

virtual ContentProviderDescriptionSharedPtr getSubProviderDescription (size_t index) KZ_OVERRIDE

See

ContentProvider::getSubProviderDescription

virtual void query (ContentQueryArgumentsSharedPtr args, ContentQuerySharedPtr contentQuery) KZ_OVERRIDE

See

ContentProvider::query

void removeContentProvider(ContentProviderSharedPtr provider, bool invalidate = true)

Removes content provider from this collection.

Parameters

• provider: Content provider to remove.

• invalidate: If true, invalidates the whole collection. If false, does nothing.