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package org.glassfish.contextpropagation.weblogic.workarea.spi;
import org.glassfish.contextpropagation.weblogic.workarea.WorkContextMap;
/**
* SPI helper for checking access control on {@link org.glassfish.contextpropagation.weblogic.workarea.WorkContextMap} keys.
* On the client this class does nothing, on the server derived implementations will check
* against applicable security policies.
*
* @author Copyright (c) 2004 by BEA Systems, Inc. All Rights Reserved.
* @exclude
*/
public abstract class WorkContextAccessController
{
public static final int CREATE = 0;
public static final int READ = 1;
public static final int UPDATE = 2;
public static final int DELETE = 3;
private static WorkContextAccessController SINGLETON;
protected WorkContextAccessController() {
if (SINGLETON != null) {
throw new IllegalStateException("Cannot register two instances of WorkContextAccessController");
}
SINGLETON = this;
}
/**
* Check whethe access of type <code>type</code> is allowed
* on <code>key</code>
*
* @param key the key to check access for
* @param type the type of access required
* @return true if access is allowed, false otherwise
*/
public static boolean isAccessAllowed(String key, int type) {
return getAccessController().checkAccess(key, type);
}
public static WorkContextMap getPriviledgedWorkContextMap(WorkContextMap map) {
return getAccessController().getPriviledgedWrapper(map);
}
/**
* SPI provider implementation of {@link #isAccessAllowed}
* @param key
* @param type
* @return
*/
protected boolean checkAccess(String key, int type) {
return true;
}
/**
* SPI provider implementation of {@link #getPriviledgedWorkContextMap}
* @param map
* @return
*/
protected WorkContextMap getPriviledgedWrapper(WorkContextMap map) {
return map;
}
private static WorkContextAccessController getAccessController() {
if (SINGLETON == null) return new WorkContextAccessController() {};
return SINGLETON;
}
}