org.netbeans.mdr.persistence.btreeimpl.btreeindex
Class BtreeIterator

java.lang.Object
  org.netbeans.mdr.persistence.btreeimpl.btreeindex.BtreeIterator

All Implemented Interfaces:

java.util.Iterator

public class BtreeIterator
extends java.lang.Object
implements java.util.Iterator

Iterator over a BtreeCollection, which is the set of values contained in a SinglevaluedBtree.

Version:

1.0

Author:

Dana Bergen

Field Summary

protected Btree	btree
protected org.netbeans.mdr.persistence.btreeimpl.btreeindex.SearchResult	current
protected int	modCount
protected BtreePageSource	pageSource

Method Summary

protected void	finalize()
boolean	hasNext() Tests whether there are any more elements to return
java.lang.Object	next() Gets the next value in the btree.
void	remove() This is not supported.

Methods inherited from class java.lang.Object

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

Field Detail

btree

protected Btree btree

current

protected org.netbeans.mdr.persistence.btreeimpl.btreeindex.SearchResult current

pageSource

protected BtreePageSource pageSource

modCount

protected int modCount

Method Detail

hasNext

public boolean hasNext()

Tests whether there are any more elements to return

Specified by:

hasNext in interface java.util.Iterator

Returns:

true if a call to next() would succeed

next

public java.lang.Object next()
                      throws java.util.NoSuchElementException

Gets the next value in the btree. If this is on a different page from the previous value, the old page will be unpinned. If there are no more records, the last page will be unpinned.

Specified by:

next in interface java.util.Iterator

Returns:

The next value in the btree

Throws:

java.util.NoSuchElementException - If there was any error or if there are no more records

finalize

protected void finalize()

Overrides:

finalize in class java.lang.Object

remove

public void remove()
            throws java.lang.UnsupportedOperationException

This is not supported.

Specified by:

remove in interface java.util.Iterator

Throws:

java.lang.UnsupportedOperationException - Always thrown.