org.datanucleus.store.rdbms.query
Class StatementResultMapping

java.lang.Object
  org.datanucleus.store.rdbms.query.StatementResultMapping

public class StatementResultMapping
extends Object

Definition of the mapping of result expressions in a datastore statement. In a typical RDBMS SQL statement the result clause will contain many expressions. If the overall result of the statement maps to a class then we use StatementClassMapping. If the overall result has various expressions then we use this. Each position in the result can either be a StatementMappingIndex, or a StatementNewObjectMapping, or a StatementClassMapping.

Constructor Summary

StatementResultMapping()

Method Summary

void	addMappingForResultExpression(int position, org.datanucleus.store.mapped.StatementClassMapping mapping)
void	addMappingForResultExpression(int position, org.datanucleus.store.mapped.StatementMappingIndex mapping)
void	addMappingForResultExpression(int position, StatementNewObjectMapping mapping)
Object	getMappingForResultExpression(int position) Accessor for the mapping information for the result expression at the position.
int	getNumberOfResultExpressions()
boolean	isEmpty()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

StatementResultMapping

public StatementResultMapping()

Method Detail

getMappingForResultExpression

public Object getMappingForResultExpression(int position)

Accessor for the mapping information for the result expression at the position.

Parameters:

position - The position in the result

Returns:

The mapping information

addMappingForResultExpression

public void addMappingForResultExpression(int position,
                                          org.datanucleus.store.mapped.StatementMappingIndex mapping)

addMappingForResultExpression

public void addMappingForResultExpression(int position,
                                          StatementNewObjectMapping mapping)

addMappingForResultExpression

public void addMappingForResultExpression(int position,
                                          org.datanucleus.store.mapped.StatementClassMapping mapping)

isEmpty

public boolean isEmpty()

getNumberOfResultExpressions

public int getNumberOfResultExpressions()

toString

public String toString()

Overrides:

toString in class Object