org.apache.hadoop.hive.ql.security.authorization.AuthorizationFactory Maven / Gradle / Ivy
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* 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.hadoop.hive.ql.security.authorization;
import org.apache.hadoop.hive.ql.metadata.AuthorizationException;
import org.apache.hadoop.hive.ql.security.authorization.plugin.HiveAccessControlException;
import org.apache.hadoop.hive.ql.security.authorization.plugin.HiveAuthzPluginException;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
public class AuthorizationFactory {
public static T create(
final Object delegated, final Class itface, final AuthorizationExceptionHandler handler) {
InvocationHandler invocation = new InvocationHandler() {
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
invokeAuth(method, args);
return null;
}
private void invokeAuth(Method method, Object[] args) throws Throwable {
try {
method.invoke(delegated, args);
} catch (InvocationTargetException e) {
if (e.getTargetException() instanceof AuthorizationException ||
e.getTargetException() instanceof HiveAuthzPluginException||
e.getTargetException() instanceof HiveAccessControlException) {
handler.exception((Exception) e.getTargetException());
}
}
}
};
return (T) Proxy.newProxyInstance(
AuthorizationFactory.class.getClassLoader(), new Class[]{itface}, invocation);
}
public static interface AuthorizationExceptionHandler {
void exception(Exception exception)
throws AuthorizationException, HiveAuthzPluginException, HiveAccessControlException;
}
public static class DefaultAuthorizationExceptionHandler
implements AuthorizationExceptionHandler {
public void exception(Exception exception) throws
AuthorizationException, HiveAuthzPluginException, HiveAccessControlException {
if (exception instanceof AuthorizationException) {
throw (AuthorizationException) exception;
}
if (exception instanceof HiveAuthzPluginException) {
throw (HiveAuthzPluginException) exception;
}
if (exception instanceof HiveAccessControlException) {
throw (HiveAccessControlException) exception;
}
throw new RuntimeException(exception);
}
}
}