org.hibernate.validator.internal.util.privilegedactions.GetDeclaredField Maven / Gradle / Ivy
/*
* Hibernate Validator, declare and validate application constraints
*
* License: Apache License, Version 2.0
* See the license.txt file in the root directory or .
*/
package org.hibernate.validator.internal.util.privilegedactions;
import java.lang.reflect.Field;
import java.security.PrivilegedAction;
/**
* Returns the declared field with the specified name or {@code null} if it does not exist.
*
* @author Emmanuel Bernard
*/
public final class GetDeclaredField implements PrivilegedAction {
private final Class clazz;
private final String fieldName;
private final boolean makeAccessible;
public static GetDeclaredField action(Class clazz, String fieldName) {
return new GetDeclaredField( clazz, fieldName, false );
}
/**
* Before using this method, you need to check the {@code HibernateValidatorPermission.ACCESS_PRIVATE_MEMBERS}
* permission against the security manager.
*/
public static GetDeclaredField andMakeAccessible(Class clazz, String fieldName) {
return new GetDeclaredField( clazz, fieldName, true );
}
private GetDeclaredField(Class clazz, String fieldName, boolean makeAccessible) {
this.clazz = clazz;
this.fieldName = fieldName;
this.makeAccessible = makeAccessible;
}
@Override
public Field run() {
try {
final Field field = clazz.getDeclaredField( fieldName );
if ( makeAccessible ) {
field.setAccessible( true );
}
return field;
}
catch (NoSuchFieldException e) {
return null;
}
}
}