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comparison graal/com.oracle.jvmci.meta/src/com/oracle/jvmci/meta/ExceptionHandler.java @ 21556:48c1ebd24120

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renamed com.oracle.graal.api[meta|code] modules to com.oracle.jvmci.[meta|code] (JBS:GRAAL-53)
author Doug Simon <doug.simon@oracle.com>
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
children
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21555:d12eaef9af72 21556:48c1ebd24120
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 }