JO.java revision 1178:82d1bb9324cf 
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.runtime.PropertyMap;
29import jdk.nashorn.internal.runtime.ScriptObject;
30
31/**
32 * Empty object class.
33 */
34public 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}
89