/*
    * 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 java.lang.annotation.Annotation;
  import java.lang.reflect.Type;
  
  /**
   * Provides type, name, and value(s) for an injection point, which is either a field to be injected or a parameter in
   * the chosen constructor of a tested class.
   */
  public abstract class InjectionProvider {
      public static final Object NULL = Void.class;
  
      @NonNull
      protected final Type declaredType;
      @NonNull
      protected final String name;
      @Nullable
      public InjectionProvider parent;
  
      protected InjectionProvider(@NonNull Type declaredType, @NonNull String name) {
          this.declaredType = declaredType;
          this.name = name;
      }
  
      @NonNull
      public final Type getDeclaredType() {
          return declaredType;
      }
  
      @NonNull
      public abstract Class<?> getClassOfDeclaredType();
  
      @NonNull
      public final String getName() {
          return name;
      }
  
      @NonNull
      public Annotation[] getAnnotations() {
          throw new UnsupportedOperationException("No annotations");
      }
  
      @Nullable
      public Object getValue(@Nullable Object owner) {
          return null;
      }
  
      public boolean isRequired() {
          return false;
      }
  
      public boolean hasAnnotation(@NonNull Class<? extends Annotation> annotationOfInterest) {
          for (Annotation annotation : getAnnotations()) {
              if (annotationOfInterest.isInstance(annotation)) {
                  return true;
              }
          }
  
          return false;
      }
  
      @Override
      public String toString() {
          Class<?> type = getClassOfDeclaredType();
          StringBuilder description = new StringBuilder().append('"').append(type.getSimpleName()).append(' ')
                  .append(name).append('"');
  
          if (parent != null) {
              description.append("\r\n  when initializing ").append(parent);
          }
  
          return description.toString();
      }
  }