public void open() throws DbException, TransactionAbortedException {
// some code goes here
if (i_pos != null) {
i = i_pos;
} else {
Catalog gc = Database.getCatalog();
HeapFile file = (HeapFile) gc.getDbFile(tableid);
i = file.iterator(tid);
}
i.open();
}
@Test
public void testIteratorClose() throws Exception {
// make more than 1 page. Previous closed iterator would start fetching
// from page 1.
HeapFile twoPageFile = SystemTestUtil.createRandomHeapFile(2, 520, null, null);
DbFileIterator it = twoPageFile.iterator(tid);
it.open();
assertTrue(it.hasNext());
it.close();
try {
it.next();
fail("expected exception");
} catch (NoSuchElementException e) {
}
// close twice is harmless
it.close();
}
@Test
public void testIteratorBasic() throws Exception {
HeapFile smallFile = SystemTestUtil.createRandomHeapFile(2, 3, null, null);
DbFileIterator it = smallFile.iterator(tid);
// Not open yet
assertFalse(it.hasNext());
try {
it.next();
fail("expected exception");
} catch (NoSuchElementException e) {
}
it.open();
int count = 0;
while (it.hasNext()) {
System.out.println(count);
assertNotNull(it.next());
count += 1;
}
assertEquals(3, count);
it.close();
}