Package org.exolab.castor.jdo
Interface QueryResults
- All Superinterfaces:
Enumeration<Object>
- All Known Implementing Classes:
OQLQueryImpl.OQLEnumeration
,SimpleQueryExecutor.SimpleQueryResults
An iteration of the results of a query. This interface provides the
ability to move forward only in the result set and pick the next
result and close it.
- Version:
- $Revision: 8141 $ $Date: 2004-05-03 16:05:30 -0600 (Mon, 03 May 2004) $
- Author:
- Assaf Arkin
-
Method Summary
Modifier and TypeMethodDescriptionboolean
absolute
(int row) moves the result of the query to the absolute position in the resultset.void
close()
Closes the result set and releases all resources held by it.boolean
hasMore()
Returns true if there are any more results in the result set.next()
Returns the next result in the result set.int
size()
Finds the size of the resulting resultset from the query.Methods inherited from interface java.util.Enumeration
asIterator, hasMoreElements, nextElement
-
Method Details
-
hasMore
Returns true if there are any more results in the result set. If an error occured reading the last result, an exception will be thrown and the result set cannot be used further.- Returns:
- True if there are any more results in the result set
- Throws:
PersistenceException
- An error with the persistence engine
-
next
Returns the next result in the result set. If there are no more results (a previous cal tohasMore()
returns false) this method will throw an exceptin. If an error occured reading the last result, an exception will be thrown and the result set cannot be used further.- Returns:
- The next result in the result set
- Throws:
PersistenceException
- An error with the persistence engineNoSuchElementException
- There are no more results in the result set
-
close
void close()Closes the result set and releases all resources held by it. -
absolute
moves the result of the query to the absolute position in the resultset.- Parameters:
row
- The row to move to- Returns:
- ???
- Throws:
PersistenceException
- A persistence error occured
-
size
Finds the size of the resulting resultset from the query.- Returns:
- Size of the resulting result set.
- Throws:
PersistenceException
- A persistence error occured
-