ParserContextBaseNode.java revision 1088:7e62d98d4625 
1/*
2 * Copyright (c) 2014, 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
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24 */
25package jdk.nashorn.internal.parser;
26
27import java.util.ArrayList;
28import java.util.List;
29import jdk.nashorn.internal.ir.Statement;
30
31/**
32 * Base class for parser context nodes
33 */
34abstract class ParserContextBaseNode implements ParserContextNode {
35    /**
36     * Flags for this node
37     */
38    protected int flags;
39
40    private List<Statement> statements;
41
42    /**
43     * Constructor
44     */
45    public ParserContextBaseNode() {
46        this.statements = new ArrayList<>();
47    }
48
49    /**
50     * @return The flags for this node
51     */
52    @Override
53    public int getFlags() {
54        return flags;
55    }
56
57    /**
58     * Returns a single flag
59     * @param flag flag
60     * @return A single flag
61     */
62    protected int getFlag(final int flag) {
63        return (flags & flag);
64    }
65
66    /**
67     * @param flag flag
68     * @return the new flags
69     */
70    @Override
71    public int setFlag(final int flag) {
72        flags |= flag;
73        return flags;
74    }
75
76    /**
77     * @return The list of statements that belongs to this node
78     */
79    @Override
80    public List<Statement> getStatements() {
81        return statements;
82    }
83
84    /**
85     * @param statements statements
86     */
87    @Override
88    public void setStatements(final List<Statement> statements) {
89        this.statements = statements;
90    }
91
92    /**
93     * Adds a Statement at the end of the Statementlist
94     * @param statement The statement to add
95     */
96    @Override
97    public void appendStatement(final Statement statement) {
98        this.statements.add(statement);
99    }
100
101    /**
102     * Adds a statement at the begining of the statementlist
103     * @param statement The statement to add
104     */
105    @Override
106    public void prependStatement(final Statement statement) {
107        this.statements.add(0, statement);
108    }
109}
110