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
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 package jdk.nashorn.internal.parser;
  26 
  27 import java.util.ArrayList;
  28 import java.util.List;
  29 import jdk.nashorn.internal.ir.Statement;
  30 
  31 /**
  32  * Base class for parser context nodes
  33  */
  34 abstract 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 statement list
  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 beginning of the statement list
 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 }