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JMockit is a Java toolkit for automated developer testing. It contains mocking/faking APIs and a code coverage tool, supporting both JUnit and TestNG. The mocking APIs allow all kinds of Java code, without testability restrictions, to be tested in isolation from selected dependencies.

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/*
 * Copyright (c) 2006 JMockit developers
 * This file is subject to the terms of the MIT license (see LICENSE.txt).
 */
package mockit.internal.expectations.argumentMatching;

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

public final class ClassMatcher implements ArgumentMatcher
{
   private static final Map, ClassMatcher> PRIMITIVE_MATCHERS;
   static {
      PRIMITIVE_MATCHERS = new IdentityHashMap, ClassMatcher>(16);

      PRIMITIVE_MATCHERS.put(Boolean.class, new ClassMatcher(Boolean.class));
      PRIMITIVE_MATCHERS.put(Character.class, new ClassMatcher(Character.class));
      PRIMITIVE_MATCHERS.put(Byte.class, new ClassMatcher(Byte.class));
      PRIMITIVE_MATCHERS.put(Short.class, new ClassMatcher(Short.class));
      PRIMITIVE_MATCHERS.put(Integer.class, new ClassMatcher(Integer.class));
      PRIMITIVE_MATCHERS.put(Float.class, new ClassMatcher(Float.class));
      PRIMITIVE_MATCHERS.put(Long.class, new ClassMatcher(Long.class));
      PRIMITIVE_MATCHERS.put(Double.class, new ClassMatcher(Double.class));

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

   @Nonnull
   public static ClassMatcher create(@Nonnull Class expectedClass) {
      ClassMatcher matcher = PRIMITIVE_MATCHERS.get(expectedClass);

      if (matcher == null) {
         matcher = new ClassMatcher(expectedClass);
      }

      return matcher;
   }

   @Nonnull private final String nameOfExpectedClass;
   @Nonnull private final Class matchableClass;

   private ClassMatcher(@Nonnull Class expectedClass) {
      nameOfExpectedClass = expectedClass.getName();
      matchableClass = expectedClass;
   }

   private ClassMatcher(@Nonnull Class primitiveClass, @Nonnull Class primitiveWrapperClass) {
      nameOfExpectedClass = primitiveClass.getName();
      matchableClass = primitiveWrapperClass;
   }

   @Override
   public boolean same(@Nonnull ClassMatcher other) { return matchableClass == other.matchableClass; }

   @Override
   public boolean matches(@Nullable Object argValue) { return matchableClass.isInstance(argValue); }

   @Override
   public void writeMismatchPhrase(@Nonnull ArgumentMismatch argumentMismatch) {
      argumentMismatch.append("an instance of ").append(nameOfExpectedClass);
   }
}