/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (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.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.harmony.luni.util;
import java.lang.reflect.AccessibleObject;
import java.security.Policy;
import java.security.PrivilegedAction;
import java.security.Security;
/**
* Helper class to avoid multiple anonymous inner class for
* <code>{@link java.security.AccessController#doPrivileged(PrivilegedAction)}</code>
* calls.
*/
public class PriviAction implements PrivilegedAction {
private Object arg1;
private Object arg2;
private int action;
private static final int GET_SYSTEM_PROPERTY = 1;
private static final int GET_SECURITY_POLICY = 2;
private static final int SET_ACCESSIBLE = 3;
private static final int GET_SECURITY_PROPERTY = 4;
/**
* Creates a PrivilegedAction to get the security property with the given
* name.
*
* @param property
* the name of the property
*
* @see Security#getProperty
*/
public static PrivilegedAction getSecurityProperty(String property) {
return new PriviAction(GET_SECURITY_PROPERTY, property);
}
private PriviAction(int action, Object arg) {
this.action = action;
this.arg1 = arg;
}
/**
* Creates a PrivilegedAction to get the current security policy object.
*
* @see Policy#getPolicy
*/
public PriviAction() {
action = GET_SECURITY_POLICY;
}
/**
* Creates a PrivilegedAction to disable the access checks to the given
* object.
*
* @param object
* the object whose accessible flag will be set to
* <code>true</code>
*
* @see AccessibleObject#setAccessible(boolean)
*/
public PriviAction(AccessibleObject object) {
action = SET_ACCESSIBLE;
arg1 = object;
}
/**
* Creates a PrivilegedAction to return the value of the system property
* with the given key.
*
* @param property
* the key of the system property
*
* @see System#getProperty(String)
*/
public PriviAction(String property) {
action = GET_SYSTEM_PROPERTY;
arg1 = property;
}
/**
* Creates a PrivilegedAction to return the value of the system property
* with the given key.
*
* @param property
* the key of the system property
* @param defaultAnswer
* the return value if the system property does not exist
*
* @see System#getProperty(String, String)
*/
public PriviAction(String property, String defaultAnswer) {
action = GET_SYSTEM_PROPERTY;
arg1 = property;
arg2 = defaultAnswer;
}
/**
* Performs the actual privileged computation as defined by the constructor.
*
* @see java.security.PrivilegedAction#run()
*/
public Object run() {
switch (action) {
case GET_SYSTEM_PROPERTY:
return System.getProperty((String) arg1, (String) arg2);
case GET_SECURITY_PROPERTY:
return Security.getProperty((String) arg1);
case GET_SECURITY_POLICY:
return Policy.getPolicy();
case SET_ACCESSIBLE:
((AccessibleObject) arg1).setAccessible(true);
}
return null;
}
}