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Java > Open Source Codes > com > caucho > amber > query > OneToManySchemaExpr


1 /*
2  * Copyright (c) 1998-2004 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 SoftwareFoundation, 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.query;
30
31 import com.caucho.util.L10N;
32
33 /**
34  * Represents a collection from a from-item table.
35  */
36 public class OneToManySchemaExpr extends SchemaExpr {
37   private static final L10N L = new L10N(OneToManySchemaExpr.class);
38
39   private OneToManyExpr _expr;
40
41   /**
42    * Creates the collection schema.
43    */
44   public OneToManySchemaExpr(OneToManyExpr expr)
45   {
46     _expr = expr;
47   }
48
49   /**
50    * Returns the tail name.
51    */
52   public String getTailName()
53   {
54     //return _expr.getField().getName();
55 throw new UnsupportedOperationException();
56   }
57
58   /**
59    * Creates a field-based schema.
60    */
61   public SchemaExpr createField(QueryParser parser, String name)
62     throws QueryParseException
63   {
64     throw parser.error(L.l("collections in FROM may not be sub-collected."));
65   }
66
67   /**
68    * Adds the from item.
69    */
70   public FromItem addFromItem(QueryParser parser, String id)
71     throws QueryParseException
72   {
73     _expr.bindSelect(parser, id);
74
75     FromItem fromItem = _expr.getChildFromItem();
76
77     return fromItem;
78   }
79 }
80
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