# Class Arg

java.lang.Object
org.apache.commons.validator.Arg

All Implemented Interfaces:
  `Serializable, Cloneable`

public class Arg extends Object implements Cloneable, Serializable
A default argument or an argument for a specific validator definition (ex: required) can be stored to pass into a message as parameters. This can be used in a pluggable validator for constructing locale sensitive messages by using `MessageFormat` or an equivalent class. The resource field can be used to determine if the value stored in the argument is a value to be retrieved from a locale sensitive message retrieval system like `java.util.PropertyResourceBundle`. The resource field defaults to 'true'.

Instances of this class are configured with an <arg> xml element.

See Also:
  - Serialized Form

- ## Field Summary

  Fields
  Modifier and Type
  Field
  Description
  `protected String`
  `bundle`
  The resource bundle name that this Arg's `key` should be resolved in (optional).
  `protected String`
  `key`
  The key or value of the argument.
  `protected String`
  `name`
  The name dependency that this argument goes with (optional).
  `protected int`
  `position`
  This argument's position in the message.
  `protected boolean`
  `resource`
  Whether or not the key is a message resource (optional).

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `Arg()`
  Constructs a new instance.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `Object`
  `clone()`
  Creates and returns a copy of this object.
  `String`
  `getBundle()`
  Gets the resource bundle name.
  `String`
  `getKey()`
  Gets the key/value.
  `String`
  `getName()`
  Gets the name of the dependency.
  `int`
  `getPosition()`
  Gets the replacement position.
  `boolean`
  `isResource()`
  Tests whether or not the key is a resource key or literal value.
  `void`
  `setBundle(String bundle)`
  Sets the resource bundle name.
  `void`
  `setKey(String key)`
  Sets the key/value.
  `void`
  `setName(String name)`
  Sets the name of the dependency.
  `void`
  `setPosition(int position)`
  Sets this argument's replacement position.
  `void`
  `setResource(boolean resource)`
  Sets whether or not the key is a resource.
  `String`
  `toString()`
  Returns a string representation of the object.

  ### Methods inherited from class Object

  `equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

- ## Field Details

  - ### bundle

    protected String bundle
    The resource bundle name that this Arg's `key` should be resolved in (optional).
    Since:
      1.1

  - ### key

    protected String key
    The key or value of the argument.

  - ### name

    protected String name
    The name dependency that this argument goes with (optional).

  - ### position

    protected int position
    This argument's position in the message. Set position=0 to make a replacement in this string: "some msg {0}".
    Since:
      1.1

  - ### resource

    protected boolean resource
    Whether or not the key is a message resource (optional). Defaults to true. If it is 'true', the value will try to be resolved as a message resource.

- ## Constructor Details

  - ### Arg

    public Arg()
    Constructs a new instance.

- ## Method Details

  - ### clone

    public Object clone()
    Creates and returns a copy of this object.
    Overrides:
      `clone` in class `Object`
    Returns:
      A copy of this object.

  - ### getBundle

    public String getBundle()
    Gets the resource bundle name.
    Returns:
      The bundle name.
    Since:
      1.1

  - ### getKey

    public String getKey()
    Gets the key/value.
    Returns:
      The key value.

  - ### getName

    public String getName()
    Gets the name of the dependency.
    Returns:
      The name of the dependency.

  - ### getPosition

    public int getPosition()
    Gets the replacement position.
    Returns:
      This replacement position.

  - ### isResource

    public boolean isResource()
    Tests whether or not the key is a resource key or literal value.
    Returns:
      `true` if key is a resource key.

  - ### setBundle

    public void setBundle(String bundle)
    Sets the resource bundle name.
    Parameters:
      `bundle` - The new bundle name.
    Since:
      1.1

  - ### setKey

    public void setKey(String key)
    Sets the key/value.
    Parameters:
      `key` - They to access the argument.

  - ### setName

    public void setName(String name)
    Sets the name of the dependency.
    Parameters:
      `name` - The name of the dependency.

  - ### setPosition

    public void setPosition(int position)
    Sets this argument's replacement position.
    Parameters:
      `position` - set this argument's replacement position.

  - ### setResource

    public void setResource(boolean resource)
    Sets whether or not the key is a resource.
    Parameters:
      `resource` - If true indicates the key is a resource.

  - ### toString

    public String toString()
    Returns a string representation of the object.
    Overrides:
      `toString` in class `Object`
    Returns:
      A string representation of the object.