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 java.lang.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

Nested Classes

Modifier and Type	Class and Description
class	IndexedQueryAnalyzer.Result

Constructor Summary

Constructors

Constructor and Description
IndexedQueryAnalyzer(java.lang.Class<S> type, RepositoryAccess access)

Method Summary

Methods

Modifier and Type	Method and Description
IndexedQueryAnalyzer.Result	analyze(Filter<S> filter, OrderingList<S> ordering, QueryHints hints)
java.lang.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(java.lang.Class<S> type,
                    RepositoryAccess access)

Parameters:

type - type of storable being queried

access - repository access for examing available indexes

Throws:

java.lang.IllegalArgumentException - if type or indexProvider is null

Method Detail

getStorableType

public java.lang.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:

java.lang.IllegalArgumentException - if filter is not supported

SupportException

RepositoryException