Package org.apache.openjpa.jdbc.kernel

Class XROP

java.lang.Object

org.apache.openjpa.jdbc.kernel.XROP

All Implemented Interfaces:

BatchedResultObjectProvider, ResultObjectProvider, Closeable

public class XROP
extends Object
implements BatchedResultObjectProvider

Gets multiple Result Object Providers each with different mapping.

Author:

Pinaki Poddar

Constructor Summary

Constructors

Constructor	Description
XROP(List<QueryResultMapping> mappings, List<Class<?>> classes, JDBCStore store, JDBCFetchConfiguration fetch, CallableStatement stmt)

Method Summary

Modifier and Type	Method	Description
boolean	absolute(int pos)	Returns false.
void	close()	Closes the underlying statement.
boolean	getExecutionResult()	Gets the result of executing the underlying JDBC statement.
Object	getOut(int position)
Object	getOut(String name)
ResultObjectProvider	getResultObject()	Gets the current result set, wraps it with a ResultSetResult, then wraps again with appropriate ROP based on the result set mapping.
int	getUpdateCount()	Gets the update count, provided the current result of the statement is not a result set.
void	handleCheckedException(Exception e)	Any checked exceptions that are thrown will be passed to this method.
boolean	hasMoreResults()	Affirms if more result sets are available.
boolean	next()	Throws exception.
void	open()	Opens this provider by executing the underlying Statment.
void	reset()	Throws exception.
int	size()	Returns -1.
boolean	supportsRandomAccess()	Does not support random access.

Methods inherited from class java.lang.Object

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

Constructor Details

XROP

public XROP(List<QueryResultMapping> mappings,
 List<Class<?>> classes,
 JDBCStore store,
 JDBCFetchConfiguration fetch,
 CallableStatement stmt)

Method Details

supportsRandomAccess

public boolean supportsRandomAccess()

Does not support random access.

Specified by:

supportsRandomAccess in interface ResultObjectProvider

open

public void open()
          throws Exception

Opens this provider by executing the underlying Statment. The result of execution is memorized.

Specified by:

open in interface ResultObjectProvider

Throws:

Exception

getResultObject

public ResultObjectProvider getResultObject()
                                     throws Exception

Gets the current result set, wraps it with a ResultSetResult, then wraps again with appropriate ROP based on the result set mapping.
The ResultSet and the associated connection must not be closed.

Specified by:

getResultObject in interface BatchedResultObjectProvider

Specified by:

getResultObject in interface ResultObjectProvider

Returns:

a provider or null if the underlying statement has no more results.

Throws:

Exception

close

public void close()
           throws Exception

Closes the underlying statement.

Specified by:

close in interface Closeable

Specified by:

close in interface ResultObjectProvider

Throws:

Exception

hasMoreResults

public boolean hasMoreResults()

Affirms if more result sets are available.
<b.NOTE: The side effect is to advance to the statement's next result.

Specified by:

hasMoreResults in interface BatchedResultObjectProvider

getExecutionResult

public boolean getExecutionResult()

Description copied from interface: BatchedResultObjectProvider

Gets the result of executing the underlying JDBC statement.

Specified by:

getExecutionResult in interface BatchedResultObjectProvider

Returns:

a boolean value whose semantics is same as PreparedStatement.execute().

getUpdateCount

public int getUpdateCount()

Gets the update count, provided the current result of the statement is not a result set.

Specified by:

getUpdateCount in interface BatchedResultObjectProvider

Returns:

an integer value whose semantics is same as Statement.getUpdateCount().

getOut

public Object getOut(String name)

Specified by:

getOut in interface BatchedResultObjectProvider

getOut

public Object getOut(int position)

Specified by:

getOut in interface BatchedResultObjectProvider

next

public boolean next()
             throws Exception

Throws exception.

Specified by:

next in interface ResultObjectProvider

Throws:

Exception

absolute

public boolean absolute(int pos)
                 throws Exception

Returns false.

Specified by:

absolute in interface ResultObjectProvider

Throws:

Exception

size

public int size()
         throws Exception

Returns -1.

Specified by:

size in interface ResultObjectProvider

Throws:

Exception

reset

public void reset()
           throws Exception

Throws exception.

Specified by:

reset in interface ResultObjectProvider

Throws:

Exception

handleCheckedException

public void handleCheckedException(Exception e)

Description copied from interface: ResultObjectProvider

Any checked exceptions that are thrown will be passed to this method. The provider should re-throw the exception as an appropriate unchecked exception.

Specified by:

handleCheckedException in interface ResultObjectProvider