org.junit.jupiter.params.aggregator

Interface ArgumentsAccessor

All Known Implementing Classes:

DefaultArgumentsAccessor

@API(status=EXPERIMENTAL,
     since="5.2")
public interface ArgumentsAccessor

ArgumentsAccessor defines the public API for accessing arguments provided by an ArgumentsProvider for a single invocation of a @ParameterizedTest method.

Specifically, an ArgumentsAccessor aggregates a set of arguments for a given invocation of a parameterized test and provides convenience methods for accessing those arguments in a type-safe manner with support for automatic type conversion.

An instance of ArgumentsAccessor will be automatically supplied for any parameter of type ArgumentsAccessor in a parameterized test. In addition, ArgumentsAggregator implementations are given access to an ArgumentsAccessor.

This interface is not intended to be implemented by clients.

Since:

5.2

See Also:

ArgumentsAggregator, ParameterizedTest

Method Summary

Modifier and Type	Method and Description
Object	get(int index) Get the value of the argument at the given index as an Object.
<T> T	get(int index, Class<T> requiredType) Get the value of the argument at the given index as an instance of the required type.
Boolean	getBoolean(int index) Get the value of the argument at the given index as a Boolean, performing automatic type conversion as necessary.
Byte	getByte(int index) Get the value of the argument at the given index as a Byte, performing automatic type conversion as necessary.
Character	getCharacter(int index) Get the value of the argument at the given index as a Character, performing automatic type conversion as necessary.
Double	getDouble(int index) Get the value of the argument at the given index as a Double, performing automatic type conversion as necessary.
Float	getFloat(int index) Get the value of the argument at the given index as a Float, performing automatic type conversion as necessary.
Integer	getInteger(int index) Get the value of the argument at the given index as a Integer, performing automatic type conversion as necessary.
Long	getLong(int index) Get the value of the argument at the given index as a Long, performing automatic type conversion as necessary.
Short	getShort(int index) Get the value of the argument at the given index as a Short, performing automatic type conversion as necessary.
String	getString(int index) Get the value of the argument at the given index as a String, performing automatic type conversion as necessary.
int	size() Get the number of arguments in this accessor.
Object[]	toArray() Get all arguments in this accessor as an array.
List<Object>	toList() Get all arguments in this accessor as an immutable list.

Method Detail

get

Object get(int index)
    throws ArgumentAccessException

Get the value of the argument at the given index as an Object.

Parameters:

index - the index of the argument to get; must be greater than or equal to zero and less than size()

Returns:

the value at the given index, potentially null

Throws:

ArgumentAccessException

get

<T> T get(int index,
          Class<T> requiredType)
   throws ArgumentAccessException

Get the value of the argument at the given index as an instance of the required type.

Parameters:

index - the index of the argument to get; must be greater than or equal to zero and less than size()

requiredType - the required type of the value; never null

Returns:

the value at the given index, potentially null

Throws:

ArgumentAccessException

getCharacter

Character getCharacter(int index)
                throws ArgumentAccessException

Get the value of the argument at the given index as a Character, performing automatic type conversion as necessary.

Parameters:

index - the index of the argument to get; must be greater than or equal to zero and less than size()

Returns:

the value at the given index, potentially null

Throws:

ArgumentAccessException - if the value cannot be accessed or converted to the desired type

getBoolean

Boolean getBoolean(int index)
            throws ArgumentAccessException

Get the value of the argument at the given index as a Boolean, performing automatic type conversion as necessary.

Parameters:

index - the index of the argument to get; must be greater than or equal to zero and less than size()

Returns:

the value at the given index, potentially null

Throws:

ArgumentAccessException - if the value cannot be accessed or converted to the desired type

getByte

Byte getByte(int index)
      throws ArgumentAccessException

Get the value of the argument at the given index as a Byte, performing automatic type conversion as necessary.

Parameters:

index - the index of the argument to get; must be greater than or equal to zero and less than size()

Returns:

the value at the given index, potentially null

Throws:

ArgumentAccessException - if the value cannot be accessed or converted to the desired type

getShort

Short getShort(int index)
        throws ArgumentAccessException

Get the value of the argument at the given index as a Short, performing automatic type conversion as necessary.

Parameters:

index - the index of the argument to get; must be greater than or equal to zero and less than size()

Returns:

the value at the given index, potentially null

Throws:

ArgumentAccessException - if the value cannot be accessed or converted to the desired type

getInteger

Integer getInteger(int index)
            throws ArgumentAccessException

Get the value of the argument at the given index as a Integer, performing automatic type conversion as necessary.

Parameters:

index - the index of the argument to get; must be greater than or equal to zero and less than size()

Returns:

the value at the given index, potentially null

Throws:

ArgumentAccessException - if the value cannot be accessed or converted to the desired type

getLong

Long getLong(int index)
      throws ArgumentAccessException

Get the value of the argument at the given index as a Long, performing automatic type conversion as necessary.

Parameters:

index - the index of the argument to get; must be greater than or equal to zero and less than size()

Returns:

the value at the given index, potentially null

Throws:

ArgumentAccessException - if the value cannot be accessed or converted to the desired type

getFloat

Float getFloat(int index)
        throws ArgumentAccessException

Get the value of the argument at the given index as a Float, performing automatic type conversion as necessary.

Parameters:

index - the index of the argument to get; must be greater than or equal to zero and less than size()

Returns:

the value at the given index, potentially null

Throws:

ArgumentAccessException - if the value cannot be accessed or converted to the desired type

getDouble

Double getDouble(int index)
          throws ArgumentAccessException

Get the value of the argument at the given index as a Double, performing automatic type conversion as necessary.

Parameters:

index - the index of the argument to get; must be greater than or equal to zero and less than size()

Returns:

the value at the given index, potentially null

Throws:

ArgumentAccessException - if the value cannot be accessed or converted to the desired type

getString

String getString(int index)
          throws ArgumentAccessException

Get the value of the argument at the given index as a String, performing automatic type conversion as necessary.

Parameters:

index - the index of the argument to get; must be greater than or equal to zero and less than size()

Returns:

the value at the given index, potentially null

Throws:

ArgumentAccessException - if the value cannot be accessed or converted to the desired type

size

int size()

Get the number of arguments in this accessor.

toArray

Object[] toArray()

Get all arguments in this accessor as an array.

toList

List<Object> toList()

Get all arguments in this accessor as an immutable list.