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: *
23: * Free Software Foundation, Inc.
24: * 59 Temple Place, Suite 330
25: * Boston, MA 02111-1307 USA
26: *
27: * @author Scott Ferguson
28: */
29:
30: package com.caucho.quercus.expr;
31:
32: import com.caucho.quercus.Location;
33: import com.caucho.quercus.env.BooleanValue;
34: import com.caucho.quercus.env.Env;
35: import com.caucho.quercus.env.Value;
36:
37: /**
38: * Represents a PHP instanceof expression.
39: */
40: public class InstanceOfExpr extends UnaryExpr {
41: protected final String _right;
42:
43: public InstanceOfExpr(Location location, Expr left, String right) {
44: super (location, left);
45:
46: _right = right;
47: }
48:
49: public InstanceOfExpr(Expr left, String right) {
50: super (left);
51:
52: _right = right;
53: }
54:
55: /**
56: * Returns true for a boolean.
57: */
58: public boolean isBoolean() {
59: return true;
60: }
61:
62: /**
63: * Evaluates the equality as a boolean.
64: */
65: public Value eval(Env env) {
66: return evalBoolean(env) ? BooleanValue.TRUE
67: : BooleanValue.FALSE;
68: }
69:
70: /**
71: * Evaluates the equality as a boolean.
72: */
73: public boolean evalBoolean(Env env) {
74: // php/03p1
75: return _expr.eval(env).isA(_right);
76: }
77:
78: public String toString() {
79: return "(" + _expr + " instanceof " + _right + ")";
80: }
81: }
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