Examples with Cursor jetbrains.exodus.env.Cursor used on opensource projects

Example 26 with Cursor

use of jetbrains.exodus.env.Cursor in project xodus by JetBrains.

the class PropertyValueIterable method getIteratorImpl.

@Override
@NotNull
public EntityIteratorBase getIteratorImpl(@NotNull final PersistentStoreTransaction txn) {
    final EntityIterableBase it = getPropertyValueIndex();
    if (it.isCachedInstance()) {
        final UpdatablePropertiesCachedInstanceIterable cached = (UpdatablePropertiesCachedInstanceIterable) it;
        if (value.getClass() != cached.getPropertyValueClass()) {
            return EntityIteratorBase.EMPTY;
        }
        return cached.getPropertyValueIterator(value);
    }
    final Cursor valueIdx = openCursor(txn);
    if (valueIdx == null) {
        return EntityIteratorBase.EMPTY;
    }
    return new PropertyValueIterator(valueIdx);
}

Example 27 with Cursor

use of jetbrains.exodus.env.Cursor in project xodus by JetBrains.

the class PropertyValueIterable method isEmptyImpl.

@Override
public boolean isEmptyImpl(@NotNull PersistentStoreTransaction txn) {
    final ByteIterable key = getStore().getPropertyTypes().dataToPropertyValue(value).dataToEntry();
    final Cursor valueIdx = openCursor(txn);
    return valueIdx == null || new SingleKeyCursorIsEmptyChecker(valueIdx, key).isEmpty();
}

Example 28 with Cursor

use of jetbrains.exodus.env.Cursor in project xodus by JetBrains.

the class CursorTestBase method check.

protected void check(ITree tm, GetNext r) {
    Cursor c = tm.openCursor();
    assertEquals(false, c.getKey().iterator().hasNext());
    assertEquals(false, c.getValue().iterator().hasNext());
    for (int i = 0; i < s; i++) {
        assertEquals(true, r.n(c));
        assertEquals(c.getValue(), value("v" + i));
        assertEquals(c.getKey(), key(i));
    }
    assertEquals(false, r.n(c));
}

Example 29 with Cursor

use of jetbrains.exodus.env.Cursor in project xodus by JetBrains.

the class TreeCursorConcurrentModificationTest method testConcurrentDeleteBefore.

@Test
public void testConcurrentDeleteBefore() {
    Cursor c = tm.openCursor();
    c.getSearchKey(key(2));
    deleteImpl(key(1));
    assertTrue(c.getNext());
    assertEquals(key(3), c.getKey());
}

Example 30 with Cursor

use of jetbrains.exodus.env.Cursor in project xodus by JetBrains.

the class TreeCursorDuplicatesTest method testGetSearchKey.

@Test
public void testGetSearchKey() throws IOException {
    final TreeAwareRunnable getSearchKey = new TreeAwareRunnable(getTreeMutable()) {

        @Override
        public void run() {
            Cursor c = _t.openCursor();
            for (INode ln : valuesNoDup) {
                assertEquals(ln.getValue(), c.getSearchKey(ln.getKey()));
                assertEquals(ln.getValue(), c.getValue());
                assertEquals(ln.getKey(), c.getKey());
            }
            assertEquals(null, c.getSearchKey(key(0)));
            assertEquals(null, c.getSearchKey(key(4)));
            assertEquals(null, c.getSearchKey(key(13)));
            // prev state due to failed search
            assertEquals(values.get(values.size() - 1).getValue(), c.getValue());
            assertEquals(values.get(values.size() - 1).getKey(), c.getKey());
        }
    };
    getSearchKey.run();
    long a = saveTree();
    getSearchKey.run();
    reopen();
    getSearchKey.setTree(openTree(a, true));
    getSearchKey.run();
}