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


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 import com.caucho.amber.type.EntityType;
34
35 /**
36  * Represents from-item table.
37  */
38 public class TableIdExpr extends SchemaExpr {
39   private static final L10N L = new L10N(TableIdExpr.class);
40   
41   private EntityType _type;
42   private String _name;
43
44   /**
45    * Creates the table id expr.
46    */
47   public TableIdExpr(EntityType type, String name)
48   {
49     _type = type;
50     _name = name;
51   }
52
53   /**
54    * Returns the entity type.
55    */
56   public EntityType getEntityType()
57   {
58     return _type;
59   }
60
61   /**
62    * Returns the tail name.
63    */
64   public String getTailName()
65   {
66     return _name;
67   }
68
69   /**
70    * Creates a field-based schema.
71    */
72   public SchemaExpr createField(QueryParser parser, String name)
73     throws QueryParseException
74   {
75     throw parser.error(L.l("'{0}.{1}' is not allowed.",
76                _name, name));
77   }
78
79   /**
80    * Adds the from item.
81    */
82   public FromItem addFromItem(QueryParser parser, String id)
83     throws QueryParseException
84   {
85     FromItem fromItem = parser.addFromItem(getEntityType().getTable(), id);
86
87     return fromItem;
88   }
89 }
90
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