org.jboss.weld.security.FieldLookupAction Maven / Gradle / Ivy
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* JBoss, Home of Professional Open Source
* Copyright 2013, Red Hat, Inc., and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* 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.weld.security;
import java.lang.reflect.Field;
import java.security.PrivilegedExceptionAction;
/**
* Returns a field from the class or any class/interface in the inheritance hierarchy
*
* @author Jozef Hartinger
* @author Martin Kouba
*/
public class FieldLookupAction extends GetDeclaredFieldAction implements PrivilegedExceptionAction {
public FieldLookupAction(Class javaClass, String fieldName) {
super(javaClass, fieldName);
}
@Override
public Field run() throws NoSuchFieldException {
return lookupField(javaClass, fieldName);
}
public static Field lookupField(Class javaClass, String fieldName) throws NoSuchFieldException {
for (Class inspectedClass = javaClass; inspectedClass != null; inspectedClass = inspectedClass.getSuperclass()) {
for (Class inspectedInterface : inspectedClass.getInterfaces()) {
try {
return lookupField(inspectedInterface, fieldName);
} catch (NoSuchFieldException e) {
// Expected, nothing to see here.
}
}
try {
return inspectedClass.getDeclaredField(fieldName);
} catch (NoSuchFieldException nsme) {
// Expected, nothing to see here.
}
}
throw new NoSuchFieldException();
}
}