org.apache.bval.util.PrivilegedActions Maven / Gradle / Ivy
/*
* 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.bval.util;
import java.lang.annotation.Annotation;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
import org.apache.commons.lang3.ClassUtils;
/**
* Description: utility methods to perform actions with AccessController or without.
*/
public class PrivilegedActions {
private static String lineSeparator = null;
private static String pathSeparator = null;
/**
* Return the value of the "line.separator" system property.
*
* Requires security policy:
* 'permission java.util.PropertyPermission "read";'
*/
@Deprecated // unused method - will remove in future release
public static final String getLineSeparator() {
if (lineSeparator == null) {
lineSeparator =
AccessController.doPrivileged(new PrivilegedAction() {
public String run() {
return System.getProperty("line.separator");
}
});
}
return lineSeparator;
}
/**
* Return the value of the "path.separator" system property.
*
* Requires security policy:
* 'permission java.util.PropertyPermission "read";'
*/
@Deprecated // unused method - will remove in future release
public static final String getPathSeparator() {
if (pathSeparator == null) {
pathSeparator =
AccessController.doPrivileged(new PrivilegedAction() {
public String run() {
return System.getProperty("path.separator");
}
});
}
return pathSeparator;
}
/**
* Perform action with AccessController.doPrivileged() if security if enabled.
*
* @param action - the action to run
* @return result of running the action
*/
// should not be called by just anyone; do not increase access
private static T run(PrivilegedAction action) {
if (System.getSecurityManager() != null) {
return AccessController.doPrivileged(action);
} else {
return action.run();
}
}
/**
* Perform action with AccessController.doPrivileged() if security if enabled.
*
* @param action - the action to run
* @return result of running the action
*/
// should not be called by just anyone; do not increase access
private static T run(final PrivilegedExceptionAction action) throws PrivilegedActionException, Exception {
if (System.getSecurityManager() != null) {
return AccessController.doPrivileged(action);
} else {
return action.run();
}
}
/**
* Perform AccessController.doPrivileged() action for ClassUtil.getClass()
*
* @return Class
* @exception Exception
*/
public static Class getClass(final ClassLoader classLoader, final String className) throws Exception {
return run(new PrivilegedExceptionAction>() {
public Class run() throws Exception {
return ClassUtils.getClass(classLoader, className, true);
}
});
}
/**
* Return a PrivilegedAction object for clazz.getDeclaredMethod().invoke().
*
* Requires security policy
* 'permission java.lang.RuntimePermission "accessDeclaredMembers";'
* 'permission java.lang.reflect.ReflectPermission "suppressAccessChecks";'
*
* @return Object
* @exception IllegalAccessException, InvocationTargetException
*/
public static Object getAnnotationValue(final Annotation annotation, final String name)
throws IllegalAccessException, InvocationTargetException {
return run(new PrivilegedAction