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JMockit is a Java toolkit for automated developer testing. It contains APIs for the creation of the objects to be tested, for mocking dependencies, and for faking external APIs; JUnit (4 & 5) and TestNG test runners are supported. It also contains an advanced code coverage tool.

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/*
 * Copyright (c) 2006 Rogério Liesenfeld
 * This file is subject to the terms of the MIT license (see LICENSE.txt).
 */
package mockit.internal.util;

import java.util.*;
import javax.annotation.*;

public final class AutoBoxing
{
   private static final Map, Class> PRIMITIVE_TO_WRAPPER = new HashMap, Class>();
   private static final Map, Class> WRAPPER_TO_PRIMITIVE = new HashMap, Class>();

   static {
      WRAPPER_TO_PRIMITIVE.put(Boolean.class, boolean.class);
      WRAPPER_TO_PRIMITIVE.put(Character.class, char.class);
      WRAPPER_TO_PRIMITIVE.put(Byte.class, byte.class);
      WRAPPER_TO_PRIMITIVE.put(Short.class, short.class);
      WRAPPER_TO_PRIMITIVE.put(Integer.class, int.class);
      WRAPPER_TO_PRIMITIVE.put(Float.class, float.class);
      WRAPPER_TO_PRIMITIVE.put(Long.class, long.class);
      WRAPPER_TO_PRIMITIVE.put(Double.class, double.class);

      PRIMITIVE_TO_WRAPPER.put(boolean.class, Boolean.class);
      PRIMITIVE_TO_WRAPPER.put(char.class, Character.class);
      PRIMITIVE_TO_WRAPPER.put(byte.class, Byte.class);
      PRIMITIVE_TO_WRAPPER.put(short.class, Short.class);
      PRIMITIVE_TO_WRAPPER.put(int.class, Integer.class);
      PRIMITIVE_TO_WRAPPER.put(float.class, Float.class);
      PRIMITIVE_TO_WRAPPER.put(long.class, Long.class);
      PRIMITIVE_TO_WRAPPER.put(double.class, Double.class);
   }

   private AutoBoxing() {}

   public static boolean isWrapperOfPrimitiveType(@Nonnull Class type)
   {
      return WRAPPER_TO_PRIMITIVE.containsKey(type);
   }

   @Nullable
   public static Class getPrimitiveType(@Nonnull Class wrapperType)
   {
      return WRAPPER_TO_PRIMITIVE.get(wrapperType);
   }

   @Nullable
   public static Class getWrapperType(@Nonnull Class primitiveType)
   {
      return PRIMITIVE_TO_WRAPPER.get(primitiveType);
   }
}