com.amazon.carbonado.qe
Class IndexedQueryAnalyzer<S extends Storable>

java.lang.Object
  com.amazon.carbonado.qe.IndexedQueryAnalyzer<S>

public class IndexedQueryAnalyzer<S extends Storable>
extends Object

Analyzes a simple query specification and determines which index is best suited for its execution. Query filters passed to this analyzer cannot contain any 'or' operations.

IndexedQueryAnalyzer is sharable and thread-safe. An instance for a particular Storable type can be cached, avoiding repeated construction cost. In addition, the analyzer caches learned foreign indexes.

Author:

Brian S O'Neill

See Also:

UnionQueryAnalyzer

Nested Class Summary

class

IndexedQueryAnalyzer.Result

Constructor Summary

IndexedQueryAnalyzer(Class<S> type, RepositoryAccess access)

Method Summary

IndexedQueryAnalyzer.Result	analyze(Filter<S> filter, OrderingList<S> ordering, QueryHints hints)
Class<S>	getStorableType()

Methods inherited from class java.lang.Object

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

Constructor Detail

IndexedQueryAnalyzer

public IndexedQueryAnalyzer(Class<S> type,
                            RepositoryAccess access)

Parameters:

type - type of storable being queried

access - repository access for examing available indexes

Throws:

IllegalArgumentException - if type or indexProvider is null

Method Detail

getStorableType

public Class<S> getStorableType()

analyze

public IndexedQueryAnalyzer.Result analyze(Filter<S> filter,
                                           OrderingList<S> ordering,
                                           QueryHints hints)
                                    throws SupportException,
                                           RepositoryException

Parameters:

filter - optional filter which which must be bound and cannot contain any logical 'or' operations.

ordering - optional properties which define desired ordering

hints - optional query hints

Throws:

IllegalArgumentException - if filter is not supported

SupportException

RepositoryException