Android Open Source - spades Reflection Utils

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License

The source code is released under:

Apache License

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Java Source Code

/**
 * Copyright (C) 2013 Pau Picas Sans <pau.picas@gmail.com>
 *// ww w  .ja  va  2 s .co m
 * 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 cat.picas.spades.util;

import java.lang.reflect.Field;
import java.util.Collection;

public class ReflectionUtils {

  public static Field getField(Class<?> cls, String fieldName) throws NoSuchFieldException {
    Field field = findField(cls, fieldName);
    if (field == null) {
      throw new NoSuchFieldException(fieldName);
    }

    return field;
  }

  public static Field findField(Class<?> cls, String fieldName) {
    while (cls != null) {
      for (Field field : cls.getDeclaredFields()) {
        if (field.getName().equals(fieldName)) {
          return field;
        }
      }
      cls = cls.getSuperclass();
    }

    return null;
  }

  public static Field findField(Class<?> cls, Collection<String> fieldNames) {
    while (cls != null) {
      for (Field field : cls.getDeclaredFields()) {
        if (fieldNames.contains(field.getName())) {
          return field;
        }
      }
      cls = cls.getSuperclass();
    }

    return null;
  }

}

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