org.datanucleus.store.query
Class QueryManager

java.lang.Object
  org.datanucleus.store.query.QueryManager

public class QueryManager
extends java.lang.Object

Manages the runtime, metadata and lifecycle of queries. Provides caching of query compilations.

Constructor Summary

QueryManager(OMFContext omfContext)

Method Summary

void	addQueryCompilation(java.lang.String language, java.lang.String query, QueryCompilation compilation) Method to store the compilation for a query.
void	close()
InvocationEvaluator	getInMemoryEvaluatorForMethod(java.lang.Class type, java.lang.String methodName) Accessor for an evaluator for invocation of the specified method.
QueryCompilation	getQueryCompilationForQuery(java.lang.String language, java.lang.String query) Accessor for a Query compilation for the specified query and language.
QueryRuntime	getQueryRuntime()
Query	newQuery(java.lang.String language, ObjectManager om, java.lang.Object query) Method to generate a new query using the passed query as basis.

Methods inherited from class java.lang.Object

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

Constructor Detail

QueryManager

public QueryManager(OMFContext omfContext)

Method Detail

close

public void close()

getQueryRuntime

public QueryRuntime getQueryRuntime()

newQuery

public Query newQuery(java.lang.String language,
                      ObjectManager om,
                      java.lang.Object query)

Method to generate a new query using the passed query as basis.

Parameters:

language - The query language

om - The Object Manager

query - The query filter (String) or a previous Query

Returns:

The Query

getQueryCompilationForQuery

public QueryCompilation getQueryCompilationForQuery(java.lang.String language,
                                                    java.lang.String query)

Accessor for a Query compilation for the specified query and language.

Parameters:

language - Language of the query

query - Query string

Returns:

The compilation (if present)

addQueryCompilation

public void addQueryCompilation(java.lang.String language,
                                java.lang.String query,
                                QueryCompilation compilation)

Method to store the compilation for a query.

Parameters:

language - Language of the query

query - The query string

compilation - The compilation of this query

getInMemoryEvaluatorForMethod

public InvocationEvaluator getInMemoryEvaluatorForMethod(java.lang.Class type,
                                                         java.lang.String methodName)

Accessor for an evaluator for invocation of the specified method. If it is not a supported method then returns null.

Parameters:

methodName - Name of the method

Returns:

Evaluator suitable for this type with this method name