Fri, 04 Jan 2013 09:58:33 -0400
8005663: Update copyright year to 2013
Reviewed-by: sundar
Contributed-by: james.laskey@oracle.com
jlaskey@3 | 1 | /* |
jlaskey@7 | 2 | * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. |
jlaskey@3 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
jlaskey@3 | 4 | * |
jlaskey@3 | 5 | * This code is free software; you can redistribute it and/or modify it |
jlaskey@3 | 6 | * under the terms of the GNU General Public License version 2 only, as |
jlaskey@3 | 7 | * published by the Free Software Foundation. Oracle designates this |
jlaskey@3 | 8 | * particular file as subject to the "Classpath" exception as provided |
jlaskey@3 | 9 | * by Oracle in the LICENSE file that accompanied this code. |
jlaskey@3 | 10 | * |
jlaskey@3 | 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
jlaskey@3 | 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
jlaskey@3 | 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
jlaskey@3 | 14 | * version 2 for more details (a copy is included in the LICENSE file that |
jlaskey@3 | 15 | * accompanied this code). |
jlaskey@3 | 16 | * |
jlaskey@3 | 17 | * You should have received a copy of the GNU General Public License version |
jlaskey@3 | 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
jlaskey@3 | 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
jlaskey@3 | 20 | * |
jlaskey@3 | 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
jlaskey@3 | 22 | * or visit www.oracle.com if you need additional information or have any |
jlaskey@3 | 23 | * questions. |
jlaskey@3 | 24 | */ |
jlaskey@3 | 25 | |
jlaskey@3 | 26 | package jdk.nashorn.internal.ir; |
jlaskey@3 | 27 | |
jlaskey@3 | 28 | import jdk.nashorn.internal.ir.visitor.NodeVisitor; |
jlaskey@3 | 29 | import jdk.nashorn.internal.runtime.Source; |
jlaskey@3 | 30 | |
jlaskey@3 | 31 | /** |
jlaskey@3 | 32 | * IR representation of a catch clause. |
jlaskey@3 | 33 | * |
jlaskey@3 | 34 | */ |
jlaskey@3 | 35 | public class CatchNode extends Node { |
jlaskey@3 | 36 | /** Exception identifier. */ |
jlaskey@3 | 37 | private IdentNode exception; |
jlaskey@3 | 38 | |
jlaskey@3 | 39 | /** Exception condition. */ |
jlaskey@3 | 40 | private Node exceptionCondition; |
jlaskey@3 | 41 | |
jlaskey@3 | 42 | /** Catch body. */ |
jlaskey@3 | 43 | private Block body; |
jlaskey@3 | 44 | |
jlaskey@3 | 45 | /** Is rethrow - e.g. synthetic catch block for e.g. finallies, the parser case where |
jlaskey@3 | 46 | * there has to be at least on catch for syntactic validity */ |
jlaskey@3 | 47 | private boolean isSyntheticRethrow; |
jlaskey@3 | 48 | |
jlaskey@3 | 49 | /** |
jlaskey@3 | 50 | * Constructors |
jlaskey@3 | 51 | * |
jlaskey@3 | 52 | * @param source the source |
jlaskey@3 | 53 | * @param token token |
jlaskey@3 | 54 | * @param finish finish |
jlaskey@3 | 55 | * @param exception variable name of exception |
jlaskey@3 | 56 | * @param exceptionCondition exception condition |
jlaskey@3 | 57 | * @param body catch body |
jlaskey@3 | 58 | */ |
jlaskey@3 | 59 | public CatchNode(final Source source, final long token, final int finish, final IdentNode exception, final Node exceptionCondition, final Block body) { |
jlaskey@3 | 60 | super (source, token, finish); |
jlaskey@3 | 61 | |
jlaskey@3 | 62 | this.exception = exception; |
jlaskey@3 | 63 | this.exceptionCondition = exceptionCondition; |
jlaskey@3 | 64 | this.body = body; |
jlaskey@3 | 65 | } |
jlaskey@3 | 66 | |
jlaskey@3 | 67 | private CatchNode(final CatchNode catchNode, final CopyState cs) { |
jlaskey@3 | 68 | super(catchNode); |
jlaskey@3 | 69 | |
jlaskey@3 | 70 | exception = (IdentNode)cs.existingOrCopy(catchNode.exception); |
jlaskey@3 | 71 | exceptionCondition = cs.existingOrCopy(catchNode.exceptionCondition); |
jlaskey@3 | 72 | body = (Block)cs.existingOrCopy(catchNode.body); |
jlaskey@3 | 73 | isSyntheticRethrow = catchNode.isSyntheticRethrow; |
jlaskey@3 | 74 | } |
jlaskey@3 | 75 | |
jlaskey@3 | 76 | @Override |
jlaskey@3 | 77 | protected Node copy(final CopyState cs) { |
jlaskey@3 | 78 | return new CatchNode(this, cs); |
jlaskey@3 | 79 | } |
jlaskey@3 | 80 | |
jlaskey@3 | 81 | /** |
jlaskey@3 | 82 | * Assist in IR navigation. |
jlaskey@3 | 83 | * @param visitor IR navigating visitor. |
jlaskey@3 | 84 | */ |
jlaskey@3 | 85 | @Override |
jlaskey@3 | 86 | public Node accept(final NodeVisitor visitor) { |
jlaskey@3 | 87 | if (visitor.enter(this) != null) { |
jlaskey@3 | 88 | exception = (IdentNode)exception.accept(visitor); |
jlaskey@3 | 89 | |
jlaskey@3 | 90 | if (exceptionCondition != null) { |
jlaskey@3 | 91 | exceptionCondition = exceptionCondition.accept(visitor); |
jlaskey@3 | 92 | } |
jlaskey@3 | 93 | |
jlaskey@3 | 94 | body = (Block)body.accept(visitor); |
jlaskey@3 | 95 | return visitor.leave(this); |
jlaskey@3 | 96 | } |
jlaskey@3 | 97 | |
jlaskey@3 | 98 | return this; |
jlaskey@3 | 99 | } |
jlaskey@3 | 100 | |
jlaskey@3 | 101 | @Override |
jlaskey@3 | 102 | public void toString(final StringBuilder sb) { |
jlaskey@3 | 103 | sb.append(" catch ("); |
jlaskey@3 | 104 | exception.toString(sb); |
jlaskey@3 | 105 | |
jlaskey@3 | 106 | if (exceptionCondition != null) { |
jlaskey@3 | 107 | sb.append(" if "); |
jlaskey@3 | 108 | exceptionCondition.toString(sb); |
jlaskey@3 | 109 | } |
jlaskey@3 | 110 | sb.append(')'); |
jlaskey@3 | 111 | } |
jlaskey@3 | 112 | |
jlaskey@3 | 113 | /** |
jlaskey@3 | 114 | * Check if this catch is a synthetic rethrow |
jlaskey@3 | 115 | * @return true if this is a synthetic rethrow |
jlaskey@3 | 116 | */ |
jlaskey@3 | 117 | public boolean isSyntheticRethrow() { |
jlaskey@3 | 118 | return isSyntheticRethrow; |
jlaskey@3 | 119 | } |
jlaskey@3 | 120 | |
jlaskey@3 | 121 | /** |
jlaskey@3 | 122 | * Flag this as deliberatly generated catch all that rethrows the |
jlaskey@3 | 123 | * caught exception. This is used for example for generating finally |
jlaskey@3 | 124 | * expressions |
jlaskey@3 | 125 | */ |
jlaskey@3 | 126 | public void setIsSyntheticRethrow() { |
jlaskey@3 | 127 | this.isSyntheticRethrow = true; |
jlaskey@3 | 128 | } |
jlaskey@3 | 129 | |
jlaskey@3 | 130 | /** |
jlaskey@3 | 131 | * Get the identifier representing the exception thrown |
jlaskey@3 | 132 | * @return the exception identifier |
jlaskey@3 | 133 | */ |
jlaskey@3 | 134 | public IdentNode getException() { |
jlaskey@3 | 135 | return exception; |
jlaskey@3 | 136 | } |
jlaskey@3 | 137 | |
jlaskey@3 | 138 | /** |
jlaskey@3 | 139 | * Get the exception condition for this catch block |
jlaskey@3 | 140 | * @return the exception condition |
jlaskey@3 | 141 | */ |
jlaskey@3 | 142 | public Node getExceptionCondition() { |
jlaskey@3 | 143 | return exceptionCondition; |
jlaskey@3 | 144 | } |
jlaskey@3 | 145 | |
jlaskey@3 | 146 | /** |
jlaskey@3 | 147 | * Reset the exception condition for this catch block |
jlaskey@3 | 148 | * @param exceptionCondition the new exception condition |
jlaskey@3 | 149 | */ |
jlaskey@3 | 150 | public void setExceptionCondition(final Node exceptionCondition) { |
jlaskey@3 | 151 | this.exceptionCondition = exceptionCondition; |
jlaskey@3 | 152 | } |
jlaskey@3 | 153 | |
jlaskey@3 | 154 | /** |
jlaskey@3 | 155 | * Get the body for this catch block |
jlaskey@3 | 156 | * @return the catch block body |
jlaskey@3 | 157 | */ |
jlaskey@3 | 158 | public Block getBody() { |
jlaskey@3 | 159 | return body; |
jlaskey@3 | 160 | } |
jlaskey@3 | 161 | } |