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

Constructors

Constructor	Description
CompoundQueryable(IQueryable<T>[] queryables)

Method Summary

Modifier and Type	Method	Description
Iterator<T>	everything()	Return the iterator that delivers all rows that the target query should consider.
IIndex<T>	getIndex(String memberName)	Return an index optimized for producing candidates based on values for a memberName that denotes a member of the index type.
Object	getManagedProperty(Object client, String memberName, Object key)	Returns a property that this index manages on behalf of a client object.

Methods inherited from class org.eclipse.equinox.internal.p2.metadata.index.IndexProvider

query, query

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CompoundQueryable

public CompoundQueryable(IQueryable<T>[] queryables)

Method Detail

getIndex

public IIndex<T> getIndex(String memberName)

Description copied from interface: IIndexProvider

Return an index optimized for producing candidates based on values for a memberName that denotes a member of the index type.

Parameters:

memberName - A member of type T.

Returns:

An index or null if this provider does not support this index.

everything

public Iterator<T> 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.

getManagedProperty

public Object getManagedProperty(Object client,
                                 String memberName,
                                 Object key)

Description copied from interface: IIndexProvider

Returns a property that this index manages on behalf of a client 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.