Mercurial > hg > truffle
comparison graal/com.oracle.jvmci.meta/src/com/oracle/jvmci/meta/ExceptionHandler.java @ 21556:48c1ebd24120
renamed com.oracle.graal.api[meta|code] modules to com.oracle.jvmci.[meta|code] (JBS:GRAAL-53)
author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 27 May 2015 00:36:16 +0200 |
parents | graal/com.oracle.graal.api.meta/src/com/oracle/graal/api/meta/ExceptionHandler.java@1cde96b96673 |
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21555:d12eaef9af72 | 21556:48c1ebd24120 |
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1 /* | |
2 * Copyright (c) 2009, 2012, Oracle and/or its affiliates. All rights reserved. | |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
20 * or visit www.oracle.com if you need additional information or have any | |
21 * questions. | |
22 */ | |
23 package com.oracle.jvmci.meta; | |
24 | |
25 import java.util.*; | |
26 | |
27 /** | |
28 * Represents an exception handler within the bytecodes. | |
29 */ | |
30 public final class ExceptionHandler { | |
31 | |
32 private final int startBCI; | |
33 private final int endBCI; | |
34 private final int handlerBCI; | |
35 private final int catchTypeCPI; | |
36 private final JavaType catchType; | |
37 | |
38 /** | |
39 * Creates a new exception handler with the specified ranges. | |
40 * | |
41 * @param startBCI the start index of the protected range | |
42 * @param endBCI the end index of the protected range | |
43 * @param catchBCI the index of the handler | |
44 * @param catchTypeCPI the index of the throwable class in the constant pool | |
45 * @param catchType the type caught by this exception handler | |
46 */ | |
47 public ExceptionHandler(int startBCI, int endBCI, int catchBCI, int catchTypeCPI, JavaType catchType) { | |
48 this.startBCI = startBCI; | |
49 this.endBCI = endBCI; | |
50 this.handlerBCI = catchBCI; | |
51 this.catchTypeCPI = catchTypeCPI; | |
52 this.catchType = catchType; | |
53 } | |
54 | |
55 /** | |
56 * Returns the start bytecode index of the protected range of this handler. | |
57 */ | |
58 public int getStartBCI() { | |
59 return startBCI; | |
60 } | |
61 | |
62 /** | |
63 * Returns the end bytecode index of the protected range of this handler. | |
64 */ | |
65 public int getEndBCI() { | |
66 return endBCI; | |
67 } | |
68 | |
69 /** | |
70 * Returns the bytecode index of the handler block of this handler. | |
71 */ | |
72 public int getHandlerBCI() { | |
73 return handlerBCI; | |
74 } | |
75 | |
76 /** | |
77 * Returns the index into the constant pool representing the type of exception caught by this | |
78 * handler. | |
79 */ | |
80 public int catchTypeCPI() { | |
81 return catchTypeCPI; | |
82 } | |
83 | |
84 /** | |
85 * Checks whether this handler catches all exceptions. | |
86 * | |
87 * @return {@code true} if this handler catches all exceptions | |
88 */ | |
89 public boolean isCatchAll() { | |
90 return catchTypeCPI == 0; | |
91 } | |
92 | |
93 /** | |
94 * Returns the type of exception caught by this exception handler. | |
95 */ | |
96 public JavaType getCatchType() { | |
97 return catchType; | |
98 } | |
99 | |
100 @Override | |
101 public boolean equals(Object obj) { | |
102 if (!(obj instanceof ExceptionHandler)) { | |
103 return false; | |
104 } | |
105 ExceptionHandler that = (ExceptionHandler) obj; | |
106 if (this.startBCI != that.startBCI || this.endBCI != that.endBCI || this.handlerBCI != that.handlerBCI || this.catchTypeCPI != that.catchTypeCPI) { | |
107 return false; | |
108 } | |
109 return Objects.equals(this.catchType, that.catchType); | |
110 } | |
111 | |
112 @Override | |
113 public String toString() { | |
114 return "ExceptionHandler<startBCI=" + startBCI + ", endBCI=" + endBCI + ", handlerBCI=" + handlerBCI + ", catchTypeCPI=" + catchTypeCPI + ", catchType=" + catchType + ">"; | |
115 } | |
116 | |
117 @Override | |
118 public int hashCode() { | |
119 return catchTypeCPI ^ endBCI ^ handlerBCI; | |
120 } | |
121 } |