org.apache.openjpa.kernel
Class ExpressionStoreQuery.InMemoryExecutor

java.lang.Object
  extended by org.apache.openjpa.kernel.AbstractStoreQuery.AbstractExecutor
      extended by org.apache.openjpa.kernel.ExpressionStoreQuery.AbstractExpressionExecutor
          extended by org.apache.openjpa.kernel.ExpressionStoreQuery.InMemoryExecutor
All Implemented Interfaces:
Serializable, StoreQuery.Executor
Enclosing class:
ExpressionStoreQuery

public static class ExpressionStoreQuery.InMemoryExecutor
extends ExpressionStoreQuery.AbstractExpressionExecutor
implements StoreQuery.Executor, Serializable

Runs the expression query in memory.

See Also:
Serialized Form

Constructor Summary
ExpressionStoreQuery.InMemoryExecutor(ExpressionStoreQuery q, ClassMetaData candidate, boolean subclasses, ExpressionParser parser, Object parsed, InMemoryExpressionFactory factory)
           
 
Method Summary
 ResultObjectProvider executeQuery(StoreQuery q, Object[] params, StoreQuery.Range range)
          Return the result of executing this query with the given parameter values.
 String[] getDataStoreActions(StoreQuery q, Object[] params, StoreQuery.Range range)
          Return a description of the commands that will be sent to the datastore in order to execute the query.
 Object getOrderingValue(StoreQuery q, Object[] params, Object resultObject, int orderIndex)
          Extract the value of the orderIndexth ordering expression in Query#getOrderingClauses from the given result object.
 Class[] getProjectionTypes(StoreQuery q)
          Return the expected types of the projections used by this query, or an empty array if not a projection.
 QueryExpressions[] getQueryExpressions()
          Return the parsed query expressions for our candidate types.
 
Methods inherited from class org.apache.openjpa.kernel.ExpressionStoreQuery.AbstractExpressionExecutor
assertNotContainer, getAccessPathMetaDatas, getAlias, getAscending, getOperation, getOrderedParameterTypes, getProjectionAliases, getRange, getResultClass, getResultShape, getUpdates, hasGrouping, isAggregate, isDistinct, isPacking, toParameterArray, validate
 
Methods inherited from class org.apache.openjpa.kernel.AbstractStoreQuery.AbstractExecutor
executeDelete, executeUpdate, getParameterTypes
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface org.apache.openjpa.kernel.StoreQuery.Executor
executeDelete, executeUpdate, getAccessPathMetaDatas, getAlias, getAscending, getOperation, getOrderedParameterTypes, getParameterTypes, getProjectionAliases, getRange, getResultClass, getResultShape, getUpdates, hasGrouping, isAggregate, isDistinct, isPacking, toParameterArray, validate
 

Constructor Detail

ExpressionStoreQuery.InMemoryExecutor

public ExpressionStoreQuery.InMemoryExecutor(ExpressionStoreQuery q,
                                             ClassMetaData candidate,
                                             boolean subclasses,
                                             ExpressionParser parser,
                                             Object parsed,
                                             InMemoryExpressionFactory factory)
Method Detail

getQueryExpressions

public QueryExpressions[] getQueryExpressions()
Description copied from interface: StoreQuery.Executor
Return the parsed query expressions for our candidate types. The expressions are available only after query has been parsed.

Specified by:
getQueryExpressions in interface StoreQuery.Executor
Overrides:
getQueryExpressions in class AbstractStoreQuery.AbstractExecutor

executeQuery

public ResultObjectProvider executeQuery(StoreQuery q,
                                         Object[] params,
                                         StoreQuery.Range range)
Description copied from interface: StoreQuery.Executor
Return the result of executing this query with the given parameter values. If this query is a projection and this executor does not pack results itself, each element of the returned result object provider should be an object array containing the projection values.

Specified by:
executeQuery in interface StoreQuery.Executor
See Also:
StoreQuery.Executor.isPacking(org.apache.openjpa.kernel.StoreQuery)

getDataStoreActions

public String[] getDataStoreActions(StoreQuery q,
                                    Object[] params,
                                    StoreQuery.Range range)
Description copied from interface: StoreQuery.Executor
Return a description of the commands that will be sent to the datastore in order to execute the query.

Specified by:
getDataStoreActions in interface StoreQuery.Executor
Overrides:
getDataStoreActions in class AbstractStoreQuery.AbstractExecutor

getOrderingValue

public Object getOrderingValue(StoreQuery q,
                               Object[] params,
                               Object resultObject,
                               int orderIndex)
Description copied from interface: StoreQuery.Executor
Extract the value of the orderIndexth ordering expression in Query#getOrderingClauses from the given result object. The result object will be an object from the result object provider returned from StoreQuery.Executor.executeQuery(org.apache.openjpa.kernel.StoreQuery, java.lang.Object[], org.apache.openjpa.kernel.StoreQuery.Range). This method is used when several result lists have to be merged in memory. If this exeuctor's parent query supports executors on abstract or interface classes, this method will not be used.

Specified by:
getOrderingValue in interface StoreQuery.Executor
Overrides:
getOrderingValue in class AbstractStoreQuery.AbstractExecutor
See Also:
StoreQuery.supportsAbstractExecutors()

getProjectionTypes

public Class[] getProjectionTypes(StoreQuery q)
Description copied from interface: StoreQuery.Executor
Return the expected types of the projections used by this query, or an empty array if not a projection.

Specified by:
getProjectionTypes in interface StoreQuery.Executor
Overrides:
getProjectionTypes in class ExpressionStoreQuery.AbstractExpressionExecutor


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