Package org.eclipse.equinox.p2.query
Class CompoundQueryable<T>
java.lang.Object
org.eclipse.equinox.internal.p2.metadata.index.IndexProvider<T>
org.eclipse.equinox.p2.query.CompoundQueryable<T>
- All Implemented Interfaces:
IIndexProvider<T>
,IQueryable<T>
public final class CompoundQueryable<T>
extends org.eclipse.equinox.internal.p2.metadata.index.IndexProvider<T>
A queryable that holds a number of other IQueryables and provides a mechanism
for querying the entire set.
- Since:
- 2.0
-
Constructor Summary
ConstructorDescriptionCompoundQueryable
(Collection<? extends IQueryable<T>> queryables) Creates a queryable that combines the given collection of input queryablesCompoundQueryable
(IQueryable<T>[] queryables) -
Method Summary
Modifier and TypeMethodDescriptionboolean
Returns true if this queryable contains the given element, else false.Return the iterator that delivers all rows that the target query should consider.Return an index optimized for producing candidates based on values for amemberName
that denotes a member of the index type.getManagedProperty
(Object client, String memberName, Object key) Returns a property that this index manages on behalf of aclient
object.Methods inherited from class org.eclipse.equinox.internal.p2.metadata.index.IndexProvider
query, query
-
Constructor Details
-
CompoundQueryable
-
CompoundQueryable
Creates a queryable that combines the given collection of input queryables- Parameters:
queryables
- The collection of queryables to be combined- Since:
- 2.8
-
-
Method Details
-
getIndex
Description copied from interface:IIndexProvider
Return an index optimized for producing candidates based on values for amemberName
that denotes a member of the index type.- Parameters:
memberName
- A member of typeT
.- Returns:
- An index or
null
if this provider does not support this index.
-
everything
Description copied from interface:IIndexProvider
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
.
-
contains
Description copied from interface:IQueryable
Returns true if this queryable contains the given element, else false.- Parameters:
element
- the element to query for- Returns:
- true if the given element is found in this queryable
-
getManagedProperty
Description copied from interface:IIndexProvider
Returns a property that this index manages on behalf of aclient
object. 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
null
if no value could be found.
-