01: /*
02: * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
03: *
04: * This file is part of Resin(R) Open Source
05: *
06: * Each copy or derived work must preserve the copyright notice and this
07: * notice unmodified.
08: *
09: * 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.util.L10N;
35:
36: /**
37: * Represents a collection from a from-item table.
38: */
39: public class CollectionSchemaExpr extends SchemaExpr {
40: private static final L10N L = new L10N(CollectionSchemaExpr.class);
41:
42: private PathExpr _expr;
43: private String _name;
44:
45: /**
46: * Creates the collection schema.
47: */
48: public CollectionSchemaExpr(PathExpr expr, String name) {
49: _expr = expr;
50: _name = name;
51: }
52:
53: /**
54: * Returns the tail name.
55: */
56: public String getTailName() {
57: return _name;
58: }
59:
60: /**
61: * Creates a field-based schema.
62: */
63: public SchemaExpr createField(QueryParser parser, String name)
64: throws QueryParseException {
65: throw parser.error(L
66: .l("collections in FROM may not be sub-collected."));
67: }
68:
69: /**
70: * Adds the from item.
71: */
72: public FromItem addFromItem(QueryParser parser, String id)
73: throws QueryParseException {
74: _expr = _expr.bindSelect(parser, id);
75:
76: FromItem fromItem = _expr.bindSubPath(parser);
77:
78: return fromItem;
79: }
80: }
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