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/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
// API class
package org.mozilla.javascript;
/**
* Embeddings that wish to filter Java classes that are visible to scripts through the LiveConnect,
* should implement this interface.
*
* @see Context#setClassShutter(ClassShutter)
* @since 1.5 Release 4
* @author Norris Boyd
*/
public interface ClassShutter {
/**
* Return true iff the Java class with the given name should be exposed to scripts.
*
* An embedding may filter which Java classes are exposed through LiveConnect to JavaScript
* scripts.
*
*
Due to the fact that there is no package reflection in Java, this method will also be
* called with package names. There is no way for Rhino to tell if "Packages.a.b" is a package
* name or a class that doesn't exist. What Rhino does is attempt to load each segment of
* "Packages.a.b.c": It first attempts to load class "a", then attempts to load class "a.b",
* then finally attempts to load class "a.b.c". On a Rhino installation without any ClassShutter
* set, and without any of the above classes, the expression "Packages.a.b.c" will result in a
* [JavaPackage a.b.c] and not an error.
*
*
With ClassShutter supplied, Rhino will first call visibleToScripts before attempting to
* look up the class name. If visibleToScripts returns false, the class name lookup is not
* performed and subsequent Rhino execution assumes the class is not present. So for
* "java.lang.System.out.println" the lookup of "java.lang.System" is skipped and thus Rhino
* assumes that "java.lang.System" doesn't exist. So then for "java.lang.System.out", Rhino
* attempts to load the class "java.lang.System.out" because it assumes that "java.lang.System"
* is a package name.
*
*
*
* @param fullClassName the full name of the class (including the package name, with '.' as a
* delimiter). For example the standard string class is "java.lang.String"
* @return whether or not to reveal this class to scripts
*/
public boolean visibleToScripts(String fullClassName);
}