aboutsummaryrefslogtreecommitdiffstats
path: root/infrastructure/rhino1_7R1/src/org/mozilla/javascript/SpecialRef.java
diff options
context:
space:
mode:
Diffstat (limited to 'infrastructure/rhino1_7R1/src/org/mozilla/javascript/SpecialRef.java')
-rw-r--r--infrastructure/rhino1_7R1/src/org/mozilla/javascript/SpecialRef.java151
1 files changed, 151 insertions, 0 deletions
diff --git a/infrastructure/rhino1_7R1/src/org/mozilla/javascript/SpecialRef.java b/infrastructure/rhino1_7R1/src/org/mozilla/javascript/SpecialRef.java
new file mode 100644
index 0000000..b037eaf
--- /dev/null
+++ b/infrastructure/rhino1_7R1/src/org/mozilla/javascript/SpecialRef.java
@@ -0,0 +1,151 @@
+/* -*- 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):
+ * Igor Bukanov, igor@fastmail.fm
+ *
+ * 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;
+
+class SpecialRef extends Ref
+{
+ static final long serialVersionUID = -7521596632456797847L;
+
+ private static final int SPECIAL_NONE = 0;
+ private static final int SPECIAL_PROTO = 1;
+ private static final int SPECIAL_PARENT = 2;
+
+ private Scriptable target;
+ private int type;
+ private String name;
+
+ private SpecialRef(Scriptable target, int type, String name)
+ {
+ this.target = target;
+ this.type = type;
+ this.name = name;
+ }
+
+ static Ref createSpecial(Context cx, Object object, String name)
+ {
+ Scriptable target = ScriptRuntime.toObjectOrNull(cx, object);
+ if (target == null) {
+ throw ScriptRuntime.undefReadError(object, name);
+ }
+
+ int type;
+ if (name.equals("__proto__")) {
+ type = SPECIAL_PROTO;
+ } else if (name.equals("__parent__")) {
+ type = SPECIAL_PARENT;
+ } else {
+ throw new IllegalArgumentException(name);
+ }
+
+ if (!cx.hasFeature(Context.FEATURE_PARENT_PROTO_PROPERTIES)) {
+ // Clear special after checking for valid name!
+ type = SPECIAL_NONE;
+ }
+
+ return new SpecialRef(target, type, name);
+ }
+
+ public Object get(Context cx)
+ {
+ switch (type) {
+ case SPECIAL_NONE:
+ return ScriptRuntime.getObjectProp(target, name, cx);
+ case SPECIAL_PROTO:
+ return target.getPrototype();
+ case SPECIAL_PARENT:
+ return target.getParentScope();
+ default:
+ throw Kit.codeBug();
+ }
+ }
+
+ public Object set(Context cx, Object value)
+ {
+ switch (type) {
+ case SPECIAL_NONE:
+ return ScriptRuntime.setObjectProp(target, name, value, cx);
+ case SPECIAL_PROTO:
+ case SPECIAL_PARENT:
+ {
+ Scriptable obj = ScriptRuntime.toObjectOrNull(cx, value);
+ if (obj != null) {
+ // Check that obj does not contain on its prototype/scope
+ // chain to prevent cycles
+ Scriptable search = obj;
+ do {
+ if (search == target) {
+ throw Context.reportRuntimeError1(
+ "msg.cyclic.value", name);
+ }
+ if (type == SPECIAL_PROTO) {
+ search = search.getPrototype();
+ } else {
+ search = search.getParentScope();
+ }
+ } while (search != null);
+ }
+ if (type == SPECIAL_PROTO) {
+ target.setPrototype(obj);
+ } else {
+ target.setParentScope(obj);
+ }
+ return obj;
+ }
+ default:
+ throw Kit.codeBug();
+ }
+ }
+
+ public boolean has(Context cx)
+ {
+ if (type == SPECIAL_NONE) {
+ return ScriptRuntime.hasObjectElem(target, name, cx);
+ }
+ return true;
+ }
+
+ public boolean delete(Context cx)
+ {
+ if (type == SPECIAL_NONE) {
+ return ScriptRuntime.deleteObjectElem(target, name, cx);
+ }
+ return false;
+ }
+}
+