IParameter (Eclipse Platform API Specification)

```
public interface IParameter
```
A parameter for a command. A parameter identifies a type of information that the command might accept. For example, a "Show View" command might accept the id of a view for display. This parameter also identifies possible values, for display in the user interface.

Since:

3.1

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`String`	`getId()`	Returns the identifier for this parameter.
`String`	`getName()`	Returns the human-readable name for this parameter.
`IParameterValues`	`getValues()`	Returns the values associated with this parameter.
`boolean`	`isOptional()`	Returns whether parameter is optional.

- Method Detail
  - getId
```
String getId()
```
    Returns the identifier for this parameter.
    
    Returns:
    
    The identifier; never null.
  - getName
```
String getName()
```
    Returns the human-readable name for this parameter.
    
    Returns:
    
    The parameter name; never null.
  - getValues
```
IParameterValues getValues()
                    throws ParameterValuesException
```
    Returns the values associated with this parameter.
    
    Returns:
    
    The values associated with this parameter. This must not be null.
    
    Throws:
    
    ParameterValuesException - If the values can't be retrieved for some reason.
  - isOptional
```
boolean isOptional()
```
    Returns whether parameter is optional. Otherwise, it is required.
    
    Returns:
    
    true if the parameter is optional; false if it is required.