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 
  26 package jdk.nashorn.api.tree;
  27 
  28 import jdk.nashorn.internal.ir.LiteralNode;
  29 
  30 final class LiteralTreeImpl extends ExpressionTreeImpl implements LiteralTree {
  31     private final Object value;
  32     private final Kind kind;
  33     LiteralTreeImpl(final LiteralNode<?> node) {
  34         super(node);
  35         this.kind = literalKind(node);
  36         this.value = node.getValue();
  37     }
  38     
  39     @Override
  40     public Kind getKind() {
  41         return kind;
  42     }
  43     
  44     @Override
  45     public Object getValue() {
  46         return value;
  47     }
  48     
  49     private static Kind literalKind(final LiteralNode<?> node) {
  50         if (node.isBoolean()) {
  51             return Kind.BOOLEAN_LITERAL;
  52         } else if (node.isNumeric()) {
  53             return Kind.NUMBER_LITERAL;
  54         } else if (node.isString()) {
  55             return Kind.STRING_LITERAL;
  56         } else if (node.isNull()) {
  57             return Kind.NULL_LITERAL;
  58         } else {
  59             throw new AssertionError("should not reach here: " + node.getValue());
  60         }
  61     }
  62     
  63     @Override
  64     public <R,D> R accept(TreeVisitor<R,D> visitor, D data) {
  65         return visitor.visitLiteral(this, data);
  66     }
  67 }