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Java > Open Source Codes > com > caucho > amber > expr > CollectionIdExpr


1 /*
2  * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3  *
4  * This file is part of Resin(R) Open Source
5  *
6  * Each copy or derived work must preserve the copyright notice and this
7  * notice unmodified.
8  *
9  * Resin Open Source is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * Resin Open Source is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17  * of NON-INFRINGEMENT. See the GNU General Public License for more
18  * details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with Resin Open Source; if not, write to the
22  * Free Software Foundation, Inc.
23  * 59 Temple Place, Suite 330
24  * Boston, MA 02111-1307 USA
25  *
26  * @author Scott Ferguson
27  */
28
29 package com.caucho.amber.expr;
30
31 import com.caucho.amber.query.FromItem;
32
33
34 /**
35  * Bound identifier expression.
36  */
37 public class CollectionIdExpr extends IdExpr {
38   private AmberExpr _path;
39
40   /**
41    * Creates a new unbound id expression.
42    */
43   public CollectionIdExpr(FromItem fromItem, AmberExpr path)
44   {
45     super(fromItem);
46
47     _path = path;
48   }
49
50   /**
51    * Returns the underlying path.
52    */
53   AmberExpr getPath()
54   {
55     return _path;
56   }
57
58   /**
59    * Returns true if the expression uses the from item.
60    */
61   public boolean usesFrom(FromItem from, int type, boolean isNot)
62   {
63     return ((getFromItem() == from) ||
64             (getFromItem().getJoinExpr().getJoinTarget() == from));
65   }
66 }
67
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