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Java > Open Source Codes > com > caucho > quercus > expr > SuppressErrorExpr


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  *
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.Env;
34 import com.caucho.quercus.env.Value;
35 import com.caucho.quercus.parser.QuercusParser;
36
37 import java.io.IOException JavaDoc;
38
39 /**
40  * Represents a PHP error suppression
41  */
42 public class SuppressErrorExpr extends UnaryExpr {
43   public SuppressErrorExpr(Location location, Expr expr)
44   {
45     super(location, expr);
46   }
47
48   public SuppressErrorExpr(Expr expr)
49   {
50     super(expr);
51   }
52
53   /**
54    * Creates the assignment.
55    */
56   public Expr createAssign(QuercusParser parser, Expr value)
57     throws IOException JavaDoc
58   {
59     // php/03j2
60
61     return new SuppressErrorExpr(parser.getLocation(),
62                                  getExpr().createAssign(parser, value));
63   }
64
65   /**
66    * Creates the assignment.
67    */
68   public Expr createAssignRef(QuercusParser parser,
69                               Expr value
70   )
71     throws IOException JavaDoc
72   {
73     // php/03j2
74
75     return new SuppressErrorExpr(parser.getLocation(),
76                                  getExpr().createAssignRef(parser, value));
77   }
78
79   /**
80    * Evaluates the expression.
81    *
82    * @param env the calling environment.
83    *
84    * @return the expression value.
85    */
86   public Value eval(Env env)
87   {
88     int oldErrorMask = env.setErrorMask(0);
89
90     try {
91       return _expr.eval(env);
92     } finally {
93       env.setErrorMask(oldErrorMask);
94     }
95   }
96
97   /**
98    * Evaluates the expression as a boolean.
99    *
100    * @param env the calling environment.
101    *
102    * @return the expression value.
103    */
104   public boolean evalBoolean(Env env)
105   {
106     int oldErrorMask = env.setErrorMask(0);
107
108     try {
109       return _expr.evalBoolean(env);
110     } finally {
111       env.setErrorMask(oldErrorMask);
112     }
113   }
114
115   /**
116    * Evaluates the expression as a string.
117    *
118    * @param env the calling environment.
119    *
120    * @return the expression value.
121    */
122   public String JavaDoc evalString(Env env)
123   {
124     int oldErrorMask = env.setErrorMask(0);
125
126     try {
127       return _expr.evalString(env);
128     } finally {
129       env.setErrorMask(oldErrorMask);
130     }
131   }
132
133   /**
134    * Evaluates the expression, copying the results as necessary
135    *
136    * @param env the calling environment.
137    *
138    * @return the expression value.
139    */
140   public Value evalCopy(Env env)
141   {
142     int oldErrorMask = env.setErrorMask(0);
143
144     try {
145       return _expr.evalCopy(env);
146     } finally {
147       env.setErrorMask(oldErrorMask);
148     }
149   }
150
151   public String JavaDoc toString()
152   {
153     return "@" + _expr;
154   }
155 }
156
157
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