public abstract class TerminalFactorySpi extends Object
Service providers that want to write a new implementation should define a concrete subclass of TerminalFactorySpi with a constructor that takes an Object
as parameter. That class needs to be registered in a Provider. The engine type is TerminalFactory
. Service providers also need to implement subclasses of the abstract classes CardTerminals, CardTerminal, Card, and CardChannel.
For example:
file MyProvider.java: package com.somedomain.card; import java.security.Provider; public class MyProvider extends Provider { public MyProvider() { super("MyProvider", 1.0d, "Smart Card Example"); put("TerminalFactory.MyType", "com.somedomain.card.MySpi"); } } file MySpi.java package com.somedomain.card; import javax.smartcardio.*; public class MySpi extends TerminalFactoySpi { public MySpi(Object parameter) { // initialize as appropriate } protected CardTerminals engineTerminals() { // add implementation code here } }
Modifier | Constructor | Description |
---|---|---|
protected |
Constructs a new TerminalFactorySpi object. |
Modifier and Type | Method | Description |
---|---|---|
protected abstract CardTerminals |
engineTerminals() |
Returns the CardTerminals created by this factory. |
protected TerminalFactorySpi()
This class is part of the service provider interface and not accessed directly by applications. Applications should use TerminalFactory objects, which can be obtained by calling one of the TerminalFactory.getInstance() methods.
Concrete subclasses should define a constructor that takes an Object
as parameter. It will be invoked when an application calls one of the TerminalFactory.getInstance() methods and receives the params
object specified by the application.
protected abstract CardTerminals engineTerminals()
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https://docs.oracle.com/en/java/javase/21/docs/api/java.smartcardio/javax/smartcardio/TerminalFactorySpi.html