JO.java revision 953:221a84ef44c0 
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
26package jdk.nashorn.internal.scripts;
27
28import jdk.nashorn.internal.codegen.SpillObjectCreator;
29import jdk.nashorn.internal.runtime.PropertyMap;
30import jdk.nashorn.internal.runtime.ScriptObject;
31
32/**
33 * Empty object class.
34 */
35public class JO extends ScriptObject {
36
37    private static final PropertyMap map$ = PropertyMap.newMap();
38
39    /**
40     * Returns the initial property map to be used.
41     * @return the initial property map.
42     */
43    public static PropertyMap getInitialMap() {
44        return map$;
45    }
46
47    /**
48     * Constructor given an initial property map
49     *
50     * @param map the property map
51     */
52    public JO(final PropertyMap map) {
53        super(map);
54    }
55
56    /**
57     * Constructor given an initial prototype and an initial property map.
58     *
59     * @param proto the prototype object
60     * @param map the property map
61     */
62    public JO(final ScriptObject proto, final PropertyMap map) {
63        super(proto, map);
64    }
65
66    /**
67     * Constructor that takes a pre-initialized spill pool. Used for
68     * by {@link SpillObjectCreator} for intializing 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}
89