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DataObjectRestrictionMapper Class

Provides a way to customize mappings from generic restrictions to data-source-specific restrictions.

Inheritance Hierarchy

System.Object
  Microsoft.VisualStudio.Data.ObjectWithSite
    Microsoft.VisualStudio.Data.DataObjectRestrictionMapper

Namespace:  Microsoft.VisualStudio.Data
Assembly:  Microsoft.VisualStudio.Data (in Microsoft.VisualStudio.Data.dll)

Syntax

'Declaration
Public MustInherit Class DataObjectRestrictionMapper _
    Inherits ObjectWithSite
public abstract class DataObjectRestrictionMapper : ObjectWithSite
public ref class DataObjectRestrictionMapper abstract : public ObjectWithSite
[<AbstractClass>]
type DataObjectRestrictionMapper =  
    class 
        inherit ObjectWithSite 
    end
public abstract class DataObjectRestrictionMapper extends ObjectWithSite

The DataObjectRestrictionMapper type exposes the following members.

Constructors

  Name Description
Protected method DataObjectRestrictionMapper Class constructor. Instantiates a new instance of the DataObjectRestrictionMapper class.

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Properties

  Name Description
Protected property Connection Retrieves the DataConnection object instance for the current connection.
Public property Site Retrieves or sets the object site. (Inherited from ObjectWithSite.)

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Methods

  Name Description
Public method Equals Determines whether the specified object is equal to the current object. (Inherited from Object.)
Protected method Finalize Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public method GetHashCode Serves as the default hash function. (Inherited from Object.)
Public method GetType Gets the Type of the current instance. (Inherited from Object.)
Public method MapValuesToRestriction Maps a set of generic restrictions to a data-source-specific restriction.
Protected method MemberwiseClone Creates a shallow copy of the current Object. (Inherited from Object.)
Protected method OnSiteChanged Raises the SiteChanged event. (Inherited from ObjectWithSite.)
Public method ToString Returns a string that represents the current object. (Inherited from Object.)

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Events

  Name Description
Public event SiteChanged Event that is raised when the Site property is changed. (Inherited from ObjectWithSite.)

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Explicit Interface Implementations

  Name Description
Explicit interface implemetationPrivate method IObjectWithSite.GetSite Retrieves the last site set using the IObjectWithSite.SetSite method. In cases where there is no known site, the object returns an exception. (Inherited from ObjectWithSite.)
Explicit interface implemetationPrivate method IObjectWithSite.SetSite Provides the site's pointer to the site object. (Inherited from ObjectWithSite.)

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Remarks

Clients are able to generically enumerate certain objects using the concept mapping information provided in a DDEX provider's data object support XML. In order to perform better, a client needs the ability to use generic restrictions in their enumeration to specify which subset of objects they would like to retrieve.

To do this, it is necessary that DDEX convert generic restrictions (for example, Catalog, Schema, Name) into source-specific restrictions that are recognized natively by the DDEX provider

In most cases there is a one-to-one mapping between generic and source-specific restrictions, and this can easily be specified in the XML file. However, it is conceivable that restrictions are mapped in a more complex way, in which case a provider can implement a restriction mapper to convert the restrictions appropriately.

Inherits from the ObjectWithSite class.

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

See Also

Reference

Microsoft.VisualStudio.Data Namespace