FileDocCategorySizeDatePackage
B.javaAPI DocJava Card3551Wed Mar 22 21:07:24 GMT 2006com.sun.javacard.samples.odSample.packageB

B

public class B extends Applet implements Shareable, AppletEvent
package AID - 0xA0 0x00 0x00 0x00 0x62 0x03 0x01 0x0C 0x07 0x02 applet AID - 0xA0 0x00 0x00 0x00 0x62 0x03 0x01 0x0C 0x07 0x02 0x01 Applet used to demonstrate applet deletion and package deletion. It also demonstrates dependencies by sharing references to objects and shearable references across packages

Fields Summary
static BTreeNode
sObj
static B
sbFirst
short
data
BTreeNode
obj
B
bFirst
B
bRef
Constructors Summary
private B(byte[] bArray, short offset, byte length)
Constructor. Makes 2nd instance have a reference to the 1st instance. The 2nd instance also has a reference to the BTreeNode object owned by the 1st instance. Also registers with eigher the default AID or the one provided in parameters

    data=C.DATA;
    if(sObj==null){
      obj=new BTreeNode();
      sObj=obj;
      sbFirst = this;
      bFirst = this;
    }else{      
      // move static reference to BTreeNode object into instance field
      obj=sObj;
      sObj=null;    
      // move static reference to B's first instance into instance field
      bFirst = sbFirst;
      sbFirst = null;     
      JCSystem.requestObjectDeletion();
    }
    //register
    if(bArray[offset]==(short)0){
		this.register();
    }else{ 		
		this.register(bArray,(short)(offset+1),bArray[offset]);
    }
Methods Summary
public ShareablegetShareableInterfaceObject(AID client_aid, byte param)
method returns pointer to this instance, ignores the param

		return this;
public static voidinstall(byte[] bArr, short bOffset, byte bLength)
method instantiates aninstance of B passing the arguments

	
	        	 
	      
		new B(bArr,bOffset,bLength);
public voidprocess(APDU apdu)
method processes the APDU commands passed to this applet instance. It only accepts the SELECT and SETUP dependency(0x12) commands.

            byte[] buffer = apdu.getBuffer();
            if (selectingApplet()) return;
            else if (buffer[ISO7816.OFFSET_CLA]==(byte)0x80){         
                 switch (buffer[ISO7816.OFFSET_INS]) {
                     case 0x12:
                         // setup reference from B's first instance to this
                         bFirst.setReference(this);
                         break;
                     default:
                       ISOException.throwIt(ISO7816.SW_INS_NOT_SUPPORTED);
                 }
            }
            else ISOException.throwIt(ISO7816.SW_CLA_NOT_SUPPORTED);
public voidresetReference()
method resets reference in bRef field to null. This is called to remove applet dependency

            bRef = null;
public voidsetReference(com.sun.javacard.samples.odSample.packageB.B b)
method sets reference in bRef field to input parameter B object. This is used for applet dependency and uninstall demonstration

            bRef = b;
public voiduninstall()
uninstall method called before applet deletion

            bFirst.resetReference();