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 }