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


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 import com.caucho.amber.query.QueryParseException;
33 import com.caucho.amber.query.QueryParser;
34 import com.caucho.amber.type.EntityType;
35 import com.caucho.util.L10N;
36
37 /**
38  * Represents from-item table.
39  */
40 public class TableIdExpr extends SchemaExpr {
41   private static final L10N L = new L10N(TableIdExpr.class);
42   
43   private EntityType _type;
44   private String JavaDoc _name;
45
46   /**
47    * Creates the table id expr.
48    */
49   public TableIdExpr(EntityType type, String JavaDoc name)
50   {
51     _type = type;
52     _name = name;
53   }
54
55   /**
56    * Returns the entity type.
57    */
58   public EntityType getEntityType()
59   {
60     return _type;
61   }
62
63   /**
64    * Returns the tail name.
65    */
66   public String JavaDoc getTailName()
67   {
68     return _name;
69   }
70
71   /**
72    * Creates a field-based schema.
73    */
74   public SchemaExpr createField(QueryParser parser, String JavaDoc name)
75     throws QueryParseException
76   {
77     throw parser.error(L.l("'{0}.{1}' is not allowed.",
78                _name, name));
79   }
80
81   /**
82    * Adds the from item.
83    */
84   public FromItem addFromItem(QueryParser parser, String JavaDoc id)
85     throws QueryParseException
86   {
87     FromItem fromItem = parser.addFromItem(getEntityType().getTable(), id);
88
89     return fromItem;
90   }
91 }
92
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