Interface IIndexProvider<T>
- All Known Implementing Classes:
CompoundQueryable,org.eclipse.equinox.internal.p2.metadata.index.IndexProvider
public interface IIndexProvider<T>
An index provider is typically an IQueryable.
- Since:
- 2.0
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Method Summary
Modifier and TypeMethodDescriptionReturn the iterator that delivers all rows that the target query should consider.Return an index optimized for producing candidates based on values for amemberNamethat denotes a member of the index type.getManagedProperty(Object client, String memberName, Object key) Returns a property that this index manages on behalf of aclientobject.
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Method Details
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getIndex
Return an index optimized for producing candidates based on values for amemberNamethat denotes a member of the index type.- Parameters:
memberName- A member of typeT.- Returns:
- An index or
nullif this provider does not support this index.
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everything
Return the iterator that delivers all rows that the target query should consider. This is used when no index can be found for any possible member.- Returns:
- An iterator. Possibly empty but never
null.
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getManagedProperty
Returns a property that this index manages on behalf of aclientobject. Examples of this is the properties that a profile manages for installable units.- Parameters:
client- The client for which the property is managed. Typically an IU.memberName- The name of the managed properties, i.e. "profileProperties"key- The property key- Returns:
- The managed property value or
nullif no value could be found.
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