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Berkeley DB version 4.8.24 |
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public interface ForwardCursor<V>
Cursor operations limited to traversing forward. See EntityCursor
for general information on cursors.
ForwardCursor objects are not thread-safe. Cursors
should be opened, used and closed by a single thread.
WARNING: Cursors must always be closed to prevent resource leaks
which could lead to the index becoming unusable or cause an
OutOfMemoryError. To ensure that a cursor is closed in the
face of exceptions, close it in a finally block.
| Method Summary | |
|---|---|
void |
close()
Closes the cursor. |
Iterator<V> |
iterator()
Returns an iterator over the key range, starting with the value following the current position or at the first value if the cursor is uninitialized. |
Iterator<V> |
iterator(LockMode lockMode)
Returns an iterator over the key range, starting with the value following the current position or at the first value if the cursor is uninitialized. |
V |
next()
Moves the cursor to the next value and returns it, or returns null if there are no more values in the cursor range. |
V |
next(LockMode lockMode)
Moves the cursor to the next value and returns it, or returns null if there are no more values in the cursor range. |
| Method Detail |
|---|
V next()
throws DatabaseException
LockMode.DEFAULT is used implicitly.
DatabaseException
V next(LockMode lockMode)
throws DatabaseException
lockMode - the lock mode to use for this operation, or null to
use LockMode.DEFAULT.
DatabaseExceptionIterator<V> iterator()
LockMode.DEFAULT is used implicitly.
iterator in interface Iterable<V>Iterator<V> iterator(LockMode lockMode)
lockMode - the lock mode to use for all operations performed
using the iterator, or null to use LockMode.DEFAULT.
void close()
throws DatabaseException
DatabaseException
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