org.jboss.marshalling.reflect.SerializableClassRegistry Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
/*
* JBoss, Home of Professional Open Source.
* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* Licensed 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.jboss.marshalling.reflect;
import static java.lang.System.getSecurityManager;
import static java.security.AccessController.doPrivileged;
import java.io.SerializablePermission;
import java.security.PrivilegedAction;
/**
* A registry for reflection information usable by serialization implementations. Objects returned from this registry
* can be used to invoke private methods without security checks, so it is important to be careful not to "leak" instances
* out of secured implementations.
*/
public final class SerializableClassRegistry {
private SerializableClassRegistry() {
}
private static final SerializableClassRegistry INSTANCE = new SerializableClassRegistry();
private static final SerializablePermission PERMISSION = new SerializablePermission("allowSerializationReflection");
/**
* Get the serializable class registry instance, if allowed by the current security manager. The caller must have
* the {@code java.io.SerializablePermission} {@code "allowSerializationReflection"} in order to invoke this method.
*
* @return the registry
* @throws SecurityException if the caller does not have sufficient privileges
*/
public static SerializableClassRegistry getInstance() throws SecurityException {
final SecurityManager manager = getSecurityManager();
if (manager != null) {
manager.checkPermission(PERMISSION);
}
return INSTANCE;
}
static SerializableClassRegistry getInstanceUnchecked() {
return INSTANCE;
}
private static final ClassValue classValue = new ClassValue() {
protected SerializableClass computeValue(final Class type) {
if (getSecurityManager() == null) {
return new SerializableClass(type);
} else {
return doPrivileged(new PrivilegedAction() {
public SerializableClass run() {
return new SerializableClass(type);
}
});
}
}
};
/**
* Look up serialization information for a class. The resultant object will be cached.
*
* @param subject the class to look up
* @return the serializable class information
*/
public SerializableClass lookup(final Class subject) {
if (subject == null) {
return null;
}
return classValue.get(subject);
}
/**
* Release all reflection information belonging to the given class loader.
*
* @param classLoader the class loader to release
* @deprecated No longer required.
*/
@SuppressWarnings("unused")
public void release(ClassLoader classLoader) {
// no-op
}
}