javax.persistence

Interface Parameter<T>

Type Parameters:

T - the type of the parameter

All Known Subinterfaces:

ParameterExpression<T>

All Known Implementing Classes:

ParameterExpressionImpl

public interface Parameter<T>

Type for query parameter objects.

Since:

Java Persistence 2.0

See Also:

Query, TypedQuery

Method Summary

Methods

Modifier and Type	Method and 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 Java persistence query language query or native query when the implementation does not support this use