/*
    * Copyright (c) 2006 JMockit developers
    * This file is subject to the terms of the MIT license (see LICENSE.txt).
    */
   package mockit.internal.injection;
   
   import edu.umd.cs.findbugs.annotations.NonNull;
   import edu.umd.cs.findbugs.annotations.Nullable;
   
  import mockit.Tested;
  import mockit.internal.state.ParameterNames;
  import mockit.internal.util.TestMethod;
  import mockit.internal.util.TypeConversion;
  
  import org.checkerframework.checker.index.qual.NonNegative;
  
  final class TestedParameter extends TestedObject {
      @NonNull
      private final TestMethod testMethod;
      @NonNegative
      private final int parameterIndex;
  
      TestedParameter(@NonNull InjectionState injectionState, @NonNull TestMethod testMethod,
              @NonNegative int parameterIndex, @NonNull Tested metadata) {
          super(injectionState, metadata, testMethod.testClass, ParameterNames.getName(testMethod, parameterIndex),
                  testMethod.getParameterType(parameterIndex), testMethod.getParameterClass(parameterIndex));
          this.testMethod = testMethod;
          this.parameterIndex = parameterIndex;
      }
  
      @Nullable
      @Override
      Object getExistingTestedInstanceIfApplicable(@NonNull Object testClassInstance) {
          Object testedObject = null;
  
          if (!createAutomatically) {
              String providedValue = metadata.value();
  
              if (!providedValue.isEmpty()) {
                  Class<?> parameterClass = testMethod.getParameterClass(parameterIndex);
                  testedObject = TypeConversion.convertFromString(parameterClass, providedValue);
  
                  if (testedObject != null) {
                      testMethod.setParameterValue(parameterIndex, testedObject);
                  }
              }
  
              createAutomatically = testedObject == null;
          }
  
          return testedObject;
      }
  
      @Override
      void setInstance(@NonNull Object testClassInstance, @Nullable Object testedInstance) {
          testMethod.setParameterValue(parameterIndex, testedInstance);
      }
  }