/*
*
*
* Copyright 1990-2007 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 only, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License version 2 for more details (a copy is
* included at /legal/license.txt).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this work; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 or visit www.sun.com if you need additional
* information or have any questions.
*/
package sim.toolkit;
import javacard.framework.*;
import sim.toolkit.*;
/**
* This is a base class for all SAT applets. It provides shareable
* interface, local APDU buffer creation, local instance of the Toolkit
* Exception. The 'process' method should be never invoked and
* its overriding not needed.
*
* <p />Derived SAT applet can look like:
* <pre>
* public class SATApplet extends SATBaseApplet {
* private SATApplet() {
* ToolkitRegistry reg;
* register();
* reg = ToolkitRegistry.getEntry();
* reg.setEvent(EVENT_XXXXX);
* }
*
* public static void install(byte[] bArray, short bOffset, byte bLength) {
* new SATApplet();
* }
*
* public void processToolkit(byte event) {
* switch (event) {
* case EVENT_XXXXX:
* break;
* }
* }
* }
* </pre>
*/
public abstract class SATBaseApplet extends Applet
implements ToolkitInterface, ToolkitConstants {
/** APDU buffer */
private byte[] apduBuffer = null;
/** Shared instance of TookitException */
private ToolkitException toolkitExceptionInstance = null;
/**
* Constructor
*/
protected SATBaseApplet() {
}
/**
* Returns shareable interface object to SAT Applet.
*
* @param clientAID - aid of SIM Framework
* @param parameter
* @return The current applet instance
*/
public Shareable getShareableInterfaceObject(AID clientAID,
byte parameter) {
return this;
}
/**
* Returns the APDUBuffer. If it does not exist then allocates it.
* @return apdu buffer
* @throws ToolkitException if SATAccessor is unavailable
*/
public byte[] getAPDUBuffer() throws ToolkitException {
if (apduBuffer == null) {
apduBuffer = new byte[ViewHandler.SATAccessor.getAPDUBufferMax()];
}
return apduBuffer;
}
/**
* Returns the ToolkitException instance.
* If it does not exist yet then creates it.
* @return ToolkitException instance
*/
public ToolkitException getToolkitExceptionInstance() {
if (toolkitExceptionInstance == null) {
toolkitExceptionInstance = new ToolkitException((short)0);
}
return toolkitExceptionInstance;
}
/**
* Process method that is called by JCRE if this applet is selected.
* @param apdu An APDU to process
*/
public void process(APDU apdu) {
}
/**
* Process method called by GSMApplet when an evelope is received.
* @param event An event to be handled
*/
public abstract void processToolkit(byte event);
}
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