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Posted to scm@geronimo.apache.org by ad...@apache.org on 2003/11/08 23:40:28 UTC
cvs commit: incubator-geronimo/modules/core/src/java/org/apache/geronimo/security/util ContextManager.java
adc 2003/11/08 14:40:28
Added: modules/core/src/java/org/apache/geronimo/security/util
ContextManager.java
Log:
Keeps track of the AccessControlContexts for each thread.
Revision Changes Path
1.1 incubator-geronimo/modules/core/src/java/org/apache/geronimo/security/util/ContextManager.java
Index: ContextManager.java
===================================================================
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2003 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http:www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" and
* "Apache Geronimo" must not be used to endorse or promote products
* derived from this software without prior written permission. For
* written permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* "Apache Geronimo", nor may "Apache" appear in their name, without
* prior written permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http:www.apache.org/>.
*
* ====================================================================
*/
package org.apache.geronimo.security.util;
import org.apache.geronimo.security.GeronimoSecurityPermission;
import java.util.Stack;
import java.security.AccessControlContext;
/**
*
* @version $Revision: 1.1 $ $Date: 2003/11/08 22:40:28 $
*/
public class ContextManager {
private static ContextThreadLocalStack contexts = new ContextThreadLocalStack();
public static final GeronimoSecurityPermission GET_CONTEXT = new GeronimoSecurityPermission("getContext");
public static final GeronimoSecurityPermission SET_CONTEXT = new GeronimoSecurityPermission("setContext");
public static AccessControlContext peekContext() {
SecurityManager sm = System.getSecurityManager();
if (sm != null) sm.checkPermission(GET_CONTEXT);
return contexts.peek();
}
public static AccessControlContext popContext() {
SecurityManager sm = System.getSecurityManager();
if (sm != null) sm.checkPermission(SET_CONTEXT);
return contexts.pop();
}
public static void pushContext(AccessControlContext context) {
SecurityManager sm = System.getSecurityManager();
if (sm != null) sm.checkPermission(SET_CONTEXT);
contexts.push(context);
}
private static class ContextThreadLocalStack extends ThreadLocal {
protected Object initialValue() {
return new Stack();
}
void push(AccessControlContext runAs) {
Stack stack = (Stack) super.get();
stack.push(runAs);
}
AccessControlContext pop() {
Stack stack = (Stack) super.get();
return (AccessControlContext) stack.pop();
}
AccessControlContext peek() {
Stack stack = (Stack) super.get();
return (AccessControlContext) stack.peek();
}
}
}