1/*
2 * Copyright (c) 2015, 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.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package jdk.nashorn.internal.ir;
27
28import java.util.Objects;
29import jdk.nashorn.internal.codegen.Label;
30import jdk.nashorn.internal.ir.annotations.Immutable;
31import jdk.nashorn.internal.ir.visitor.NodeVisitor;
32
33/**
34 * IR representation for synthetic jump into an inlined finally statement.
35 */
36@Immutable
37public final class JumpToInlinedFinally extends JumpStatement {
38    private static final long serialVersionUID = 1L;
39
40    /**
41     * Constructor
42     *
43     * @param labelName  label name for inlined finally block
44     */
45    public JumpToInlinedFinally(final String labelName) {
46        super(NO_LINE_NUMBER, NO_TOKEN, NO_FINISH, Objects.requireNonNull(labelName));
47    }
48
49    private JumpToInlinedFinally(final JumpToInlinedFinally breakNode, final LocalVariableConversion conversion) {
50        super(breakNode, conversion);
51    }
52
53    @Override
54    public Node accept(final NodeVisitor<? extends LexicalContext> visitor) {
55        if (visitor.enterJumpToInlinedFinally(this)) {
56            return visitor.leaveJumpToInlinedFinally(this);
57        }
58
59        return this;
60    }
61
62    @Override
63    JumpStatement createNewJumpStatement(final LocalVariableConversion conversion) {
64        return new JumpToInlinedFinally(this, conversion);
65    }
66
67    @Override
68    String getStatementName() {
69        return ":jumpToInlinedFinally";
70    }
71
72    @Override
73    public Block getTarget(final LexicalContext lc) {
74        return lc.getInlinedFinally(getLabelName());
75    }
76
77    @Override
78    public TryNode getPopScopeLimit(final LexicalContext lc) {
79        // Returns the try node to which this jump's target belongs. This will make scope popping also pop the scope
80        // for the body of the try block, if it needs scope.
81        return lc.getTryNodeForInlinedFinally(getLabelName());
82    }
83
84    @Override
85    Label getTargetLabel(final BreakableNode target) {
86        assert target != null;
87        // We're jumping to the entry of the inlined finally block
88        return ((Block)target).getEntryLabel();
89    }
90}
91