All Downloads are FREE. Search and download functionalities are using the official Maven repository.

mockit.Deencapsulation Maven / Gradle / Ivy

Go to download

JMockit is a Java toolkit for developer (unit/integration) testing. It contains mocking APIs and other tools, 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.

The newest version!
/*
 * Copyright (c) 2006-2014 Rogério Liesenfeld
 * This file is subject to the terms of the MIT license (see LICENSE.txt).
 */
package mockit;

import mockit.internal.util.*;

/**
 * Provides utility methods that enable access to ("de-encapsulate") otherwise non-accessible fields, methods and
 * constructors.
 *
 * @see Tutorial (general)
 * @see Tutorial (expectations)
 */
@SuppressWarnings("ConstantConditions")
public final class Deencapsulation
{
   private Deencapsulation() {}

   /**
    * Gets the value of a non-accessible (eg {@code private}) field from a given object.
    *
    * @param objectWithField the instance from which to get the field value
    * @param fieldName the name of the field to get
    * @param  interface or class type to which the returned value should be assignable
    *
    * @throws IllegalArgumentException if the desired field is not found
    *
    * @see #getField(Object, Class)
    * @see #setField(Object, String, Object)
    */
   public static  T getField(Object objectWithField, String fieldName)
   {
      return FieldReflection.getField(objectWithField.getClass(), fieldName, objectWithField);
   }

   /**
    * Gets the value of a non-accessible (eg {@code private}) field from a given object, assuming there is only
    * one field declared in the class of the given object whose type can receive values of the specified field type.
    *
    * @param objectWithField the instance from which to get the field value
    * @param fieldType the declared type of the field, or a sub-type of the declared field type
    *
    * @see #getField(Object, String)
    *
    * @throws IllegalArgumentException if either the desired field is not found, or more than one is
    */
   public static  T getField(Object objectWithField, Class fieldType)
   {
      return FieldReflection.getField(objectWithField.getClass(), fieldType, objectWithField);
   }

   /**
    * Gets the value of a non-accessible static field defined in a given class.
    *
    * @param classWithStaticField the class from which to get the field value
    * @param fieldName the name of the static field to get
    * @param  interface or class type to which the returned value should be assignable
    *
    * @throws IllegalArgumentException if the desired field is not found
    *
    * @see #setField(Class, String, Object)
    */
   public static  T getField(Class classWithStaticField, String fieldName)
   {
      return FieldReflection.getField(classWithStaticField, fieldName, null);
   }

   /**
    * Gets the value of a non-accessible static field defined in a given class.
    *
    * @param classWithStaticField the class from which to get the field value
    * @param fieldType the declared type of the field, or a sub-type of the declared field type
    * @param  interface or class type to which the returned value should be assignable
    *
    * @throws IllegalArgumentException if either the desired field is not found, or more than one is
    *
    * @see #setField(Class, String, Object)
    */
   public static  T getField(Class classWithStaticField, Class fieldType)
   {
      return FieldReflection.getField(classWithStaticField, fieldType, null);
   }

   /**
    * Sets the value of a non-accessible field on a given object.
    *
    * @param objectWithField the instance on which to set the field value
    * @param fieldName the name of the field to set
    * @param fieldValue the value to set the field to
    *
    * @throws IllegalArgumentException if the desired field is not found
    *
    * @see #setField(Class, String, Object)
    */
   public static void setField(Object objectWithField, String fieldName, Object fieldValue)
   {
      FieldReflection.setField(objectWithField.getClass(), objectWithField, fieldName, fieldValue);
   }

   /**
    * Sets the value of a non-accessible field on a given object.
    * The field is looked up by the type of the given field value instead of by name.
    *
    * @throws IllegalArgumentException if either the desired field is not found, or more than one is
    */
   public static void setField(Object objectWithField, Object fieldValue)
   {
      FieldReflection.setField(objectWithField.getClass(), objectWithField, null, fieldValue);
   }

   /**
    * Sets the value of a non-accessible static field on a given class.
    *
    * @param classWithStaticField the class on which the static field is defined
    * @param fieldName the name of the field to set
    * @param fieldValue the value to set the field to
    *
    * @throws IllegalArgumentException if the desired field is not found
    */
   public static void setField(Class classWithStaticField, String fieldName, Object fieldValue)
   {
      FieldReflection.setField(classWithStaticField, null, fieldName, fieldValue);
   }

   /**
    * Sets the value of a non-accessible static field on a given class.
    * The field is looked up by the type of the given field value instead of by name.
    *
    * @param classWithStaticField the class on which the static field is defined
    * @param fieldValue the value to set the field to
    *
    * @throws IllegalArgumentException if either the desired field is not found, or more than one is
    */
   public static void setField(Class classWithStaticField, Object fieldValue)
   {
      FieldReflection.setField(classWithStaticField, null, null, fieldValue);
   }

   /**
    * Invokes a non-accessible (eg {@code private}) instance method from a given class with the given arguments.
    *
    * @param objectWithMethod the instance on which the invocation is to be done; must not be null
    * @param methodName the name of the method to invoke
    * @param parameterTypes the types of the parameters as declared in the desired method
    * @param methodArgs zero or more parameter values for the invocation
    * @param  type to which the returned value should be assignable
    *
    * @return the return value from the invoked method, wrapped if primitive
    *
    * @see #invoke(Class, String, Object...)
    */
   public static  T invoke(
      Object objectWithMethod, String methodName, Class[] parameterTypes, Object... methodArgs)
   {
      Class theClass = objectWithMethod.getClass();
      return MethodReflection.invoke(theClass, objectWithMethod, methodName, parameterTypes, methodArgs);
   }

   /**
    * Invokes a non-accessible (eg {@code private}) instance method from a given class with the given arguments.
    *
    * @param objectWithMethod the instance on which the invocation is to be done; must not be null
    * @param methodName the name of the method to invoke
    * @param nonNullArgs zero or more non-null parameter values for the invocation; if a null value needs to be passed,
    * the {@code Class} object for the parameter type must be passed instead
    * @param  type to which the returned value should be assignable
    *
    * @return the return value from the invoked method, wrapped if primitive
    *
    * @throws IllegalArgumentException if a null reference was provided for a parameter
    *
    * @see #invoke(Class, String, Object...)
    */
   public static  T invoke(Object objectWithMethod, String methodName, Object... nonNullArgs)
   {
      Class theClass = objectWithMethod.getClass();
      return MethodReflection.invoke(theClass, objectWithMethod, methodName, nonNullArgs);
   }

   /**
    * Invokes a non-accessible (eg {@code private}) {@code static} method with the given arguments.
    *
    * @param classWithStaticMethod the class on which the invocation is to be done; must not be null
    * @param methodName the name of the static method to invoke
    * @param parameterTypes the types of the parameters as declared in the desired method
    * @param methodArgs zero or more parameter values for the invocation
    * @param  type to which the returned value should be assignable
    *
    * @see #invoke(String, String, Object...)
    */
   public static  T invoke(
      Class classWithStaticMethod, String methodName, Class[] parameterTypes, Object... methodArgs)
   {
      return MethodReflection.invoke(classWithStaticMethod, null, methodName, parameterTypes, methodArgs);
   }

   /**
    * Invokes a non-accessible (eg {@code private}) {@code static} method with the given arguments.
    *
    * @param classWithStaticMethod the class on which the invocation is to be done; must not be null
    * @param methodName the name of the static method to invoke
    * @param nonNullArgs zero or more non-null parameter values for the invocation; if a null value needs to be passed,
    * the {@code Class} object for the parameter type must be passed instead
    * @param  type to which the returned value should be assignable
    *
    * @throws IllegalArgumentException if a null reference was provided for a parameter
    *
    * @see #invoke(String, String, Object...)
    */
   public static  T invoke(Class classWithStaticMethod, String methodName, Object... nonNullArgs)
   {
      return MethodReflection.invoke(classWithStaticMethod, null, methodName, nonNullArgs);
   }

   /**
    * Invokes a non-accessible (eg {@code private}) {@code static} method with the given arguments.
    *
    * @param classWithStaticMethod the (fully qualified) name of the class on which the invocation is to be done;
    * must not be null
    * @param methodName the name of the static method to invoke
    * @param nonNullArgs zero or more non-null parameter values for the invocation; if a null value needs to be passed,
    * the {@code Class} object for the parameter type must be passed instead
    * @param  type to which the returned value should be assignable
    *
    * @throws IllegalArgumentException if a null reference was provided for a parameter
    *
    * @see #invoke(Class, String, Object...)
    */
   public static  T invoke(String classWithStaticMethod, String methodName, Object... nonNullArgs)
   {
      Class theClass = ClassLoad.loadClass(classWithStaticMethod);
      return MethodReflection.invoke(theClass, null, methodName, nonNullArgs);
   }

   /**
    * Creates a new instance of a given non-accessible class, invoking the constructor which has the specified parameter
    * types.
    *
    * @param className the fully qualified name of the desired class
    * @param parameterTypes the formal parameter types for the desired constructor, possibly empty
    * @param initArgs the invocation arguments for the constructor, which must be consistent with the specified
    * parameter types
    * @param  type to which the returned instance should be assignable
    *
    * @return a newly created instance of the specified class, initialized through the specified constructor and
    * arguments
    *
    * @see #newInstance(String, Object...)
    * @see #newInstance(Class, Class[], Object...)
    * @see #newInnerInstance(String, Object, Object...)
    */
   public static  T newInstance(String className, Class[] parameterTypes, Object... initArgs)
   {
      return ConstructorReflection.newInstance(className, parameterTypes, initArgs);
   }

   /**
    * Creates a new instance of a given class, invoking the constructor which has the specified parameter types.
    *
    * @param classToInstantiate the class to be instantiated
    * @param parameterTypes the formal parameter types for the desired constructor, possibly empty
    * @param initArgs the invocation arguments for the constructor, which must be consistent with the specified
    * parameter types
    * @param  type to which the returned instance should be assignable
    *
    * @return a newly created instance of the specified class, initialized through the specified constructor and
    * arguments
    *
    * @see #newInstance(Class, Object...)
    * @see #newInnerInstance(Class, Object, Object...)
    * @see #newInstance(String, Class[], Object...)
    */
   public static  T newInstance(Class classToInstantiate, Class[] parameterTypes, Object... initArgs)
   {
      return ConstructorReflection.newInstance(classToInstantiate, parameterTypes, initArgs);
   }

   /**
    * Creates a new instance of a given non-accessible class, invoking the constructor which has parameters matching the
    * number, order, and types of the given non-null arguments.
    *
    * @param nonNullArgs zero or more non-null parameter values for the invocation; if a null value needs to be passed,
    * the {@code Class} object for the parameter type must be passed instead
    * @param  type to which the returned instance should be assignable
    *
    * @throws IllegalArgumentException if a null reference was provided for a parameter, or if no constructor was found
    * that matched the given argument types
    *
    * @see #newInnerInstance(String, Object, Object...)
    * @see #newInstance(Class, Object...)
    * @see #newInstance(String, Class[], Object...)
    */
   public static  T newInstance(String className, Object... nonNullArgs)
   {
      return ConstructorReflection.newInstance(className, nonNullArgs);
   }

   /**
    * Creates a new instance of a given class, invoking the constructor which has parameters matching the number, order,
    * and types of the given non-null arguments.
    *
    * @param nonNullArgs zero or more non-null parameter values for the invocation; if a null value needs to be passed,
    * the {@code Class} object for the parameter type must be passed instead
    * @param  type to which the returned instance should be assignable
    *
    * @throws IllegalArgumentException if a null reference was provided for a parameter, or if no constructor was found
    * that matched the given argument types
    *
    * @see #newInnerInstance(Class, Object, Object...)
    * @see #newInstance(String, Object...)
    * @see #newInstance(String, Class[], Object...)
    */
   public static  T newInstance(Class classToInstantiate, Object... nonNullArgs)
   {
      return ConstructorReflection.newInstance(classToInstantiate, nonNullArgs);
   }

   /**
    * The same as {@link #newInstance(String, Class[], Object...)}, but for instantiating an inner non-accessible class
    * of some other class, and where all other (if any) initialization arguments are known to be non-null.
    *
    * @param innerClassSimpleName the inner class simple name, that is, the part after the "$" character in its full
    * name
    * @param outerClassInstance the outer class instance to which the inner class instance will belong
    * @param nonNullArgs zero or more non-null parameter values for the invocation; if a null value needs to be passed,
    * the {@code Class} object for the parameter type must be passed instead
    * @param  type to which the returned instance should be assignable
    *
    * @throws IllegalArgumentException if a null reference was provided for a parameter
    *
    * @see #newInnerInstance(Class, Object, Object...)
    */
   public static  T newInnerInstance(String innerClassSimpleName, Object outerClassInstance, Object... nonNullArgs)
   {
      return ConstructorReflection.newInnerInstance(innerClassSimpleName, outerClassInstance, nonNullArgs);
   }

   /**
    * The same as {@link #newInstance(String, Class[], Object...)}, but for instantiating an inner class of some other
    * class, and where all other (if any) initialization arguments are known to be non-null.
    *
    * @param innerClassToInstantiate the inner class to be instantiated
    * @param outerClassInstance the outer class instance to which the inner class instance will belong
    * @param nonNullArgs zero or more non-null parameter values for the invocation; if a null value needs to be passed,
    * the {@code Class} object for the parameter type must be passed instead
    * @param  type to which the returned instance should be assignable
    *
    * @throws IllegalArgumentException if a null reference was provided for a parameter
    *
    * @see #newInnerInstance(String, Object, Object...)
    */
   public static  T newInnerInstance(
      Class innerClassToInstantiate, Object outerClassInstance, Object... nonNullArgs)
   {
      return ConstructorReflection.newInnerInstance(innerClassToInstantiate, outerClassInstance, nonNullArgs);
   }
}
    

    

    

            

    

            



    
    






    
© 2015 - 2024 Weber Informatics LLC | Privacy Policy