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.field.IdField;
32: import com.caucho.amber.query.FromItem;
33: import com.caucho.amber.query.QueryParser;
34: import com.caucho.amber.type.EntityType;
35: import com.caucho.util.CharBuffer;
36:
37: /**
38: * A path expression that returns an entity.
39: */
40: public interface EntityPathExpr extends PathExpr {
41: /**
42: * Returns the entity type.
43: */
44: public EntityType getTargetType();
45:
46: /**
47: * Returns the table.
48: */
49: public String getTable();
50:
51: /**
52: * Binds the expression as a select item.
53: */
54: public FromItem bindSubPath(QueryParser parser);
55:
56: /**
57: * Returns the from item
58: */
59: public FromItem getChildFromItem();
60:
61: /**
62: * Generates the where expression for a subfield
63: */
64: public void generateWhere(CharBuffer cb, IdField field);
65:
66: /**
67: * Generates the having expression.
68: */
69: public void generateHaving(CharBuffer cb, IdField field);
70: }
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