aboutsummaryrefslogtreecommitdiffstats
path: root/infrastructure/rhino1_7R1/src/org/mozilla/javascript/NativeJavaTopPackage.java
blob: b5c9b491abf3ee8e7811ef04d60874d6c341dfea (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 *
 * ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Rhino code, released
 * May 6, 1999.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1997-1999
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Norris Boyd
 *   Frank Mitchell
 *   Mike Shaver
 *
 * Alternatively, the contents of this file may be used under the terms of
 * the GNU General Public License Version 2 or later (the "GPL"), in which
 * case the provisions of the GPL are applicable instead of those above. If
 * you wish to allow use of your version of this file only under the terms of
 * the GPL and not to allow others to use your version of this file under the
 * MPL, indicate your decision by deleting the provisions above and replacing
 * them with the notice and other provisions required by the GPL. If you do
 * not delete the provisions above, a recipient may use your version of this
 * file under either the MPL or the GPL.
 *
 * ***** END LICENSE BLOCK ***** */

package org.mozilla.javascript;

/**
 * This class reflects Java packages into the JavaScript environment.  We
 * lazily reflect classes and subpackages, and use a caching/sharing
 * system to ensure that members reflected into one JavaPackage appear
 * in all other references to the same package (as with Packages.java.lang
 * and java.lang).
 *
 * @author Mike Shaver
 * @see NativeJavaArray
 * @see NativeJavaObject
 * @see NativeJavaClass
 */

public class NativeJavaTopPackage
    extends NativeJavaPackage implements Function, IdFunctionCall
{
    static final long serialVersionUID = -1455787259477709999L;

    // we know these are packages so we can skip the class check
    // note that this is ok even if the package isn't present.
    private static final String commonPackages = ""
                                                 +"java.lang;"
                                                 +"java.lang.reflect;"
                                                 +"java.io;"
                                                 +"java.math;"
                                                 +"java.net;"
                                                 +"java.util;"
                                                 +"java.util.zip;"
                                                 +"java.text;"
                                                 +"java.text.resources;"
                                                 +"java.applet;"
                                                 +"javax.swing;"
                                                 ;

    NativeJavaTopPackage(ClassLoader loader)
    {
        super(true, "", loader);
    }

    public Object call(Context cx, Scriptable scope, Scriptable thisObj,
                       Object[] args)
    {
        return construct(cx, scope, args);
    }

    public Scriptable construct(Context cx, Scriptable scope, Object[] args)
    {
        ClassLoader loader = null;
        if (args.length != 0) {
            Object arg = args[0];
            if (arg instanceof Wrapper) {
                arg = ((Wrapper)arg).unwrap();
            }
            if (arg instanceof ClassLoader) {
                loader = (ClassLoader)arg;
            }
        }
        if (loader == null) {
            Context.reportRuntimeError0("msg.not.classloader");
            return null;
        }
        return new NativeJavaPackage(true, "", loader);
    }

    public static void init(Context cx, Scriptable scope, boolean sealed)
    {
        ClassLoader loader = cx.getApplicationClassLoader();
        final NativeJavaTopPackage top = new NativeJavaTopPackage(loader);
        top.setPrototype(getObjectPrototype(scope));
        top.setParentScope(scope);

        String[] names = Kit.semicolonSplit(commonPackages);
        for (int i = 0; i != names.length; ++i) {
            top.forcePackage(names[i], scope);
        }

        // getClass implementation
        IdFunctionObject getClass = new IdFunctionObject(top, FTAG, Id_getClass,
                                                         "getClass", 1, scope);

        // We want to get a real alias, and not a distinct JavaPackage
        // with the same packageName, so that we share classes and top
        // that are underneath.
        String[] topNames = { "java", "javax", "org", "com", "edu", "net" };
        NativeJavaPackage[] topPackages = new NativeJavaPackage[topNames.length];
        for (int i=0; i < topNames.length; i++) {
            topPackages[i] = (NativeJavaPackage)top.get(topNames[i], top);
        }

        // It's safe to downcast here since initStandardObjects takes
        // a ScriptableObject.
        ScriptableObject global = (ScriptableObject) scope;

        if (sealed) {
            getClass.sealObject();
        }
        getClass.exportAsScopeProperty();
        global.defineProperty("Packages", top, ScriptableObject.DONTENUM);
        for (int i=0; i < topNames.length; i++) {
            global.defineProperty(topNames[i], topPackages[i],
                                  ScriptableObject.DONTENUM);
        }
    }

    public Object execIdCall(IdFunctionObject f, Context cx, Scriptable scope,
                             Scriptable thisObj, Object[] args)
    {
        if (f.hasTag(FTAG)) {
            if (f.methodId() == Id_getClass) {
                return js_getClass(cx, scope, args);
            }
        }
        throw f.unknown();
    }

    private Scriptable js_getClass(Context cx, Scriptable scope, Object[] args)
    {
        if (args.length > 0  && args[0] instanceof Wrapper) {
            Scriptable result = this;
            Class cl = ((Wrapper) args[0]).unwrap().getClass();
            // Evaluate the class name by getting successive properties of
            // the string to find the appropriate NativeJavaClass object
            String name = cl.getName();
            int offset = 0;
            for (;;) {
                int index = name.indexOf('.', offset);
                String propName = index == -1
                                  ? name.substring(offset)
                                  : name.substring(offset, index);
                Object prop = result.get(propName, result);
                if (!(prop instanceof Scriptable))
                    break;  // fall through to error
                result = (Scriptable) prop;
                if (index == -1)
                    return result;
                offset = index+1;
            }
        }
        throw Context.reportRuntimeError0("msg.not.java.obj");
    }

    private static final Object FTAG = new Object();
    private static final int Id_getClass = 1;
}