| 1 | /** |
| 2 | * Copyright (C) 2006 NetMind Consulting Bt. |
| 3 | * |
| 4 | * This library is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU Lesser General Public |
| 6 | * License as published by the Free Software Foundation; either |
| 7 | * version 3 of the License, or (at your option) any later version. |
| 8 | * |
| 9 | * This library is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | * Lesser General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU Lesser General Public |
| 15 | * License along with this library; if not, write to the Free Software |
| 16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 17 | */ |
| 18 | |
| 19 | package hu.netmind.beankeeper.query.impl; |
| 20 | |
| 21 | import java.util.AbstractList; |
| 22 | import hu.netmind.beankeeper.query.LazyList; |
| 23 | import hu.netmind.beankeeper.query.LazyListHooks; |
| 24 | import hu.netmind.beankeeper.parser.*; |
| 25 | |
| 26 | /** |
| 27 | * This is an empty lazy list. |
| 28 | * @author Brautigam Robert |
| 29 | * @version Revision: $Revision$ |
| 30 | */ |
| 31 | public class EmptyLazyListImpl extends AbstractList implements LazyList |
| 32 | { |
| 33 | /** |
| 34 | * Nop. |
| 35 | */ |
| 36 | public Object get(int index) |
| 37 | { |
| 38 | return null; |
| 39 | } |
| 40 | |
| 41 | /** |
| 42 | * Empty list has zero size. |
| 43 | */ |
| 44 | public int size() |
| 45 | { |
| 46 | return 0; |
| 47 | } |
| 48 | |
| 49 | /** |
| 50 | * Nop. |
| 51 | */ |
| 52 | public LazyListHooks getHooks() |
| 53 | { |
| 54 | return null; |
| 55 | } |
| 56 | |
| 57 | /** |
| 58 | * Nop. |
| 59 | */ |
| 60 | public void setHooks(LazyListHooks hooks) |
| 61 | { |
| 62 | } |
| 63 | |
| 64 | /** |
| 65 | * Nop. |
| 66 | */ |
| 67 | public QueryStatementList getStmts() |
| 68 | { |
| 69 | return null; |
| 70 | } |
| 71 | |
| 72 | /** |
| 73 | * Returns true. |
| 74 | */ |
| 75 | public boolean isIterationCheap() |
| 76 | { |
| 77 | return true; |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | |
| 82 | |