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/**
 * Copyright (C) 2010-2018 Gordon Fraser, Andrea Arcuri and EvoSuite
 * contributors
 *
 * This file is part of EvoSuite.
 *
 * EvoSuite is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation, either version 3.0 of the License, or
 * (at your option) any later version.
 *
 * EvoSuite is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with EvoSuite. If not, see .
 */
package org.evosuite.runtime.util;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.lang.annotation.Annotation;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;

public class ReflectionUtils {

  protected static final Logger logger = LoggerFactory.getLogger(ReflectionUtils.class);

  public static Class[] getDeclaredClasses(Class clazz) {
    try {
      return clazz.getDeclaredClasses();
    } catch (NoClassDefFoundError e) {
      // TODO: What shall we do?
      logger.info("Error while analyzing all classes of class " + clazz + ": " + e);
      return new Class[0];
    }
  }

  public static Class[] getClasses(Class clazz) {
    try {
      return clazz.getClasses();
    } catch (NoClassDefFoundError e) {
      // TODO: What shall we do?
      logger.info("Error while analyzing all classes of class " + clazz + ": " + e);
      return new Class[0];
    }
  }

  public static Constructor[] getDeclaredConstructors(Class clazz) {
    try {
      return clazz.getDeclaredConstructors();
    } catch (NoClassDefFoundError e) {
      // TODO: What shall we do?
      logger.info("Error while analyzing declared constructors of class " + clazz + ": " + e);
      return new Constructor[0];
    }
  }

  public static Constructor[] getConstructors(Class clazz) {
    try {
      return clazz.getConstructors();
    } catch (NoClassDefFoundError e) {
      // TODO: What shall we do?
      logger.info("Error while analyzing constructors of class " + clazz + ": " + e);
      return new Constructor[0];
    }
  }

  public static Class[] getInterfaces(Class clazz) {
    try {
      return clazz.getInterfaces();
    } catch (NoClassDefFoundError e) {
      // TODO: What shall we do?
      logger.info("Error while analyzing interfaces of class " + clazz + ": " + e);
      return new Class[0];
    }
  }

  public static Method[] getDeclaredMethods(Class clazz) {
    try {
      return clazz.getDeclaredMethods();
    } catch (NoClassDefFoundError e) {
      // TODO: What shall we do?
      logger.info(
          "Error while trying to load declared methods of class " + clazz.getName() + ": " + e);
      return new Method[0];
    }
  }

  public static Method[] getMethods(Class clazz) {
    try {
      return clazz.getMethods();
    } catch (NoClassDefFoundError e) {
      // TODO: What shall we do?
      logger.info("Error while trying to load methods of class " + clazz.getName() + ": " + e);
      return new Method[0];
    }
  }

  public static Field[] getDeclaredFields(Class clazz) {
    try {
      return clazz.getDeclaredFields();
    } catch (NoClassDefFoundError e) {
      // TODO: What shall we do?
      logger.info(
          "Error while trying to load declared fields of class " + clazz.getName() + ": " + e);
      return new Field[0];
    }
  }

  public static Field getDeclaredField(Class clazz, String fieldName) {
    try {
      return clazz.getDeclaredField(fieldName);
    } catch (NoClassDefFoundError | NoSuchFieldException e) {
      logger.info("Error while trying to load declared field '" + fieldName + "' of class "
          + clazz.getName() + ": " + e);
      return null;
    }
  }

  public static Field[] getFields(Class clazz) {
    try {
      return clazz.getFields();
    } catch (NoClassDefFoundError e) {
      // TODO: What shall we do?
      logger.info("Error while trying to load fields of class " + clazz.getName() + ": " + e);
      return new Field[0];
    }
  }

  public static Annotation[] getDeclaredAnnotations(Class clazz) {
    return clazz.getDeclaredAnnotations();
  }

  public static Annotation[] getAnnotations(Class clazz) {
    return clazz.getAnnotations();
  }

  public static Annotation[] getDeclaredAnnotations(Field field) {
    return field.getDeclaredAnnotations();
  }

  public static Annotation[] getDeclaredAnnotations(Method method) {
    return method.getDeclaredAnnotations();
  }
}