Mega Code Archive
Execution of reflection
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/*
* Copyright 2008-2009 the T2 Project ant the Others.
*
* 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.t2framework.commons.util;
import java.lang.reflect.InvocationTargetException;
import java.security.AccessController;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
//import org.t2framework.commons.exception.ReflectionRuntimeException;
/**
*
* @author shot
*
*/
public class ReflectionExecutor {
/**
* Execution of reflection with {@link ReflectionAction}.
*
* @param <T>
* @param action
* @return
*/
public static <T> T doSafeAction(final ReflectionAction<T> action) {
final SecurityManager securityManager = System.getSecurityManager();
if (securityManager == null) {
try {
return action.run();
} catch (Exception e) {
throw new RuntimeException(e);
}
}
try {
return AccessController
.doPrivileged(new PrivilegedExceptionAction<T>() {
@Override
public T run() throws Exception {
return action.run();
}
});
} catch (PrivilegedActionException e) {
Throwable cause = e.getCause();
if (InvocationTargetException.class.isInstance(cause)) {
InvocationTargetException e1 = (InvocationTargetException) cause;
throw new Exception(e1.getTargetException());
}
throw new Exception(cause);
}
}
/**
* {@link ReflectionAction} interface is an executor for reflection.
*
* @author shot
*
* @param <T>
*/
public static interface ReflectionAction<T> {
T run() throws Exception;
}
}
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