Make field accessible, explicitly setting it accessible : Modifier « Reflection « Java Tutorial

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2. Reflection
3. Modifier

/*
 * Copyright 2002-2008 the original author or authors.
 *
 * 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.
 */



import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.sql.SQLException;
import java.util.Arrays;
import java.util.LinkedList;
import java.util.List;

/**
 * Simple utility class for working with the reflection API and handling
 * reflection exceptions.
 *
 * Only intended for internal use.
 *
 * @author Juergen Hoeller
 * @author Rob Harrop
 * @author Rod Johnson
 * @author Costin Leau
 * @since 1.2.2
 */
public abstract class ReflectionUtils {

  /**
   * Make the given field accessible, explicitly setting it accessible if necessary.
   * The <code>setAccessible(true)</code> method is only called when actually necessary,
   * to avoid unnecessary conflicts with a JVM SecurityManager (if active).
   * @param field the field to make accessible
   * @see java.lang.reflect.Field#setAccessible
   */
  public static void makeAccessible(Field field) {
    if (!Modifier.isPublic(field.getModifiers()) ||
        !Modifier.isPublic(field.getDeclaringClass().getModifiers())) {
      field.setAccessible(true);
    }
  }
}