Class QueryManagerImpl

java.lang.Object
org.datanucleus.store.query.QueryManagerImpl
All Implemented Interfaces:
QueryManager
Direct Known Subclasses:
FederatedQueryManagerImpl
public class QueryManagerImpl extends Object implements QueryManager
Manages the creation, compilation and results of queries. Provides caching of query compilations (generic and datastore-specific) and results.

  • Field Details

    • nucleusCtx

      protected NucleusContext nucleusCtx

    • storeMgr

      protected StoreManager storeMgr

    • queryCompilationCache

      protected final QueryCompilationCache queryCompilationCache
      Cache for generic query compilations.

    • queryCompilationCacheDatastore

      protected final QueryDatastoreCompilationCache queryCompilationCacheDatastore
      Cache for datastore query compilations.

    • queryResultsCache

      protected final QueryResultsCache queryResultsCache
      Cache for query results.

    • inmemoryQueryMethodEvaluatorByName

      protected Map<String, InvocationEvaluator> inmemoryQueryMethodEvaluatorByName
      Cache of InvocationEvaluator objects keyed by the "class:methodName", for use by in-memory querying.

    • queryMethodAliasByPrefix

      protected Map<String,String> queryMethodAliasByPrefix

  • Constructor Details

  • Method Details

    • close

      public void close()
      Description copied from interface: QueryManager
      Close the QueryManager, releasing all cached compilations and results.
      Specified by:
      close in interface QueryManager

    • getQueryMethodAliasesByPrefix

      public Map<String,String> getQueryMethodAliasesByPrefix()
      Description copied from interface: QueryManager
      Accessor for JDOQL/JPQL query method aliases keyed by the prefix.
      Specified by:
      getQueryMethodAliasesByPrefix in interface QueryManager
      Returns:
      The method aliases map

    • getQueryCompilationCache

      public QueryCompilationCache getQueryCompilationCache()
      Description copied from interface: QueryManager
      Accessor for the generic compilation cache.
      Specified by:
      getQueryCompilationCache in interface QueryManager
      Returns:
      The cache of generic compilations

    • addQueryCompilation

      public void addQueryCompilation(String language, String query, QueryCompilation compilation)
      Description copied from interface: QueryManager
      Method to store the compilation for a query.
      Specified by:
      addQueryCompilation in interface QueryManager
      Parameters:
      language - Language of the query
      query - The query string
      compilation - The compilation of this query

    • removeQueryCompilation

      public void removeQueryCompilation(String language, String query)
      Description copied from interface: QueryManager
      Method to remove a query compilation.
      Specified by:
      removeQueryCompilation in interface QueryManager
      Parameters:
      language - The query language
      query - The query string

    • getQueryCompilationForQuery

      public QueryCompilation getQueryCompilationForQuery(String language, String query)
      Description copied from interface: QueryManager
      Accessor for a Query compilation for the specified query and language.
      Specified by:
      getQueryCompilationForQuery in interface QueryManager
      Parameters:
      language - Language of the query
      query - Query string
      Returns:
      The compilation (if present)

    • getQueryDatastoreCompilationCache

      public QueryDatastoreCompilationCache getQueryDatastoreCompilationCache()
      Description copied from interface: QueryManager
      Accessor for the datastore compilation cache.
      Specified by:
      getQueryDatastoreCompilationCache in interface QueryManager
      Returns:
      The cache of datastore compilations

    • addDatastoreQueryCompilation

      public void addDatastoreQueryCompilation(String datastore, String language, String query, Object compilation)
      Description copied from interface: QueryManager
      Method to store the datastore-specific compilation for a query.
      Specified by:
      addDatastoreQueryCompilation in interface QueryManager
      Parameters:
      datastore - The datastore identifier
      language - The query language
      query - The query (string form)
      compilation - The compiled information

    • removeDatastoreQueryCompilation

      public void removeDatastoreQueryCompilation(String datastore, String language, String query)
      Description copied from interface: QueryManager
      Method to remove a cached datastore query compilation.
      Specified by:
      removeDatastoreQueryCompilation in interface QueryManager
      Parameters:
      datastore - The datastore
      language - The language
      query - The query (string form)

    • getDatastoreQueryCompilation

      public Object getDatastoreQueryCompilation(String datastore, String language, String query)
      Description copied from interface: QueryManager
      Accessor for the datastore-specific compilation for a query.
      Specified by:
      getDatastoreQueryCompilation in interface QueryManager
      Parameters:
      datastore - The datastore identifier
      language - The query language
      query - The query (string form)
      Returns:
      The compiled information (if available)

    • getQueryResultsCache

      public QueryResultsCache getQueryResultsCache()
      Description copied from interface: QueryManager
      Accessor for the query results cache.
      Specified by:
      getQueryResultsCache in interface QueryManager
      Returns:
      Query results cache (if present)

    • evictQueryResultsForType

      public void evictQueryResultsForType(Class cls)
      Description copied from interface: QueryManager
      Method to evict all query results for the specified candidate type.
      Specified by:
      evictQueryResultsForType in interface QueryManager
      Parameters:
      cls - Candidate type

    • addQueryResult

      public void addQueryResult(Query query, Map params, List<Object> results)
      Description copied from interface: QueryManager
      Method to store the results for a query.
      Specified by:
      addQueryResult in interface QueryManager
      Parameters:
      query - The query
      params - Map of parameter values keyed by param name
      results - The results (List of object identities)

    • getQueryResult

      public List<Object> getQueryResult(Query query, Map params)
      Description copied from interface: QueryManager
      Accessor for the results for a query.
      Specified by:
      getQueryResult in interface QueryManager
      Parameters:
      query - The query
      params - Map of parameter values keyed by param name
      Returns:
      The results (List of object identities)

    • getInMemoryEvaluatorForMethod

      public InvocationEvaluator getInMemoryEvaluatorForMethod(Class type, String methodName)
      Description copied from interface: QueryManager
      Accessor for an evaluator for invocation of the specified method for the supplied type. If it is not a supported method for that type then returns null.
      Specified by:
      getInMemoryEvaluatorForMethod in interface QueryManager
      Parameters:
      type - The class name
      methodName - Name of the method
      Returns:
      Evaluator suitable for this type with this method name