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.QueryParser;
33: import com.caucho.amber.type.AbstractStatefulType;
34:
35: /**
36: * Represents an amber mapping query expression
37: */
38: public interface PathExpr extends AmberExpr {
39: /**
40: * Returns the target type.
41: */
42: public AbstractStatefulType getTargetType();
43:
44: /**
45: * Creates the expr from the path.
46: */
47: public AmberExpr createField(QueryParser parser, String field);
48:
49: /**
50: * Creates an array reference.
51: */
52: public AmberExpr createArray(AmberExpr field);
53:
54: /**
55: * Binds the expression as a select item.
56: */
57: public PathExpr bindSelect(QueryParser parser, String tableName);
58:
59: /**
60: * Binds the expression as a select item.
61: */
62: public FromItem bindSubPath(QueryParser parser);
63:
64: /**
65: * Returns the from item
66: */
67: public FromItem getChildFromItem();
68: }
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