org.wildfly.security.manager.GetAccessibleDeclaredFieldAction Maven / Gradle / Ivy
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* Copyright 2016 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.wildfly.security.manager;
import java.lang.reflect.Field;
import java.security.PrivilegedAction;
/**
* A privileged action which gets and returns a non-public field from a class.
*
* @author David M. Lloyd
*/
// note: don't make this public. people should generally use the reflection index for this kind of thing.
final class GetAccessibleDeclaredFieldAction implements PrivilegedAction {
private final Class clazz;
private final String fieldName;
/**
* Construct a new instance.
*
* @param clazz the class to search
* @param fieldName the field name to search for
*/
public GetAccessibleDeclaredFieldAction(final Class clazz, final String fieldName) {
this.clazz = clazz;
this.fieldName = fieldName;
}
public Field run() {
final Field field;
try {
field = clazz.getDeclaredField(fieldName);
} catch (NoSuchFieldException e) {
throw new NoSuchFieldError(e.getMessage());
}
field.setAccessible(true);
return field;
}
}