1 /* 2 * Copyright (c) 2010, 2013, 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.internal.scripts; 27 28 import jdk.nashorn.internal.runtime.PropertyMap; 29 import jdk.nashorn.internal.runtime.ScriptObject; 30 31 /** 32 * Empty object class. 33 */ 34 public class JO extends ScriptObject { 35 36 private static final PropertyMap map$ = PropertyMap.newMap(); 37 38 /** 39 * Returns the initial property map to be used. 40 * @return the initial property map. 41 */ 42 public static PropertyMap getInitialMap() { 43 return map$; 44 } 45 46 /** 47 * Constructor given an initial property map 48 * 49 * @param map the property map 50 */ 51 public JO(final PropertyMap map) { 52 super(map); 53 } 54 55 /** 56 * Constructor given an initial prototype and an initial property map. 57 * 58 * @param proto the prototype object 59 * @param map the property map 60 */ 61 public JO(final ScriptObject proto, final PropertyMap map) { 62 super(proto, map); 63 } 64 65 /** 66 * Constructor that takes a pre-initialized spill pool. Used by 67 * {@link jdk.nashorn.internal.codegen.SpillObjectCreator} and 68 * {@link jdk.nashorn.internal.parser.JSONParser} for initializing object literals 69 * 70 * @param map property map 71 * @param primitiveSpill primitive spill pool 72 * @param objectSpill reference spill pool 73 */ 74 public JO(final PropertyMap map, final long[] primitiveSpill, final Object[] objectSpill) { 75 super(map, primitiveSpill, objectSpill); 76 } 77 78 /** 79 * A method handle of this method is passed to the ScriptFunction constructor. 80 * 81 * @param map the property map to use for allocatorMap 82 * 83 * @return newly allocated ScriptObject 84 */ 85 public static ScriptObject allocate(final PropertyMap map) { 86 return new JO(map); 87 } 88 }