Parameter (Jakarta Persistence API documentation)

Type Parameters:

T - the type of the parameter

All Known Subinterfaces:

ParameterExpression<T>
```
public interface Parameter<T>
```
Type for query parameter objects.

Since:

2.0

See Also:

Query, TypedQuery

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`String`	`getName()`	Return the parameter name, or null if the parameter is not a named parameter or no name has been assigned.
`Class<T>`	`getParameterType()`	Return the Java type of the parameter.
`Integer`	`getPosition()`	Return the parameter position, or null if the parameter is not a positional parameter.

- Method Detail
  - getName
```
String getName()
```
    Return the parameter name, or null if the parameter is not a named parameter or no name has been assigned.
    
    Returns:
    
    parameter name
  - getPosition
```
Integer getPosition()
```
    Return the parameter position, or null if the parameter is not a positional parameter.
    
    Returns:
    
    position of parameter
  - getParameterType
```
Class<T> getParameterType()
```
    Return the Java type of the parameter. Values bound to the parameter must be assignable to this type. This method is required to be supported for criteria queries only. Applications that use this method for Java Persistence query language queries and native queries will not be portable.
    
    Returns:
    
    the Java type of the parameter
    
    Throws:
    
    IllegalStateException - if invoked on a parameter obtained from a query language query or native query when the implementation does not support this use