uicc.toolkit
Interface EnvelopeHandler

All Superinterfaces:

BERTLVViewHandler, ViewHandler

public interface EnvelopeHandler
extends BERTLVViewHandler

The EnvelopeHandler interface contains basic methods to handle the Envelope data field. A class implementing this interface will be used by the Toolkit applet in order to have access to the current Envelope information. A class implementing the EnvelopeHandler interface is a Temporary JCRE Entry Point Object and can be retrieved by invoking the getTheHandler() method of the EnvelopeHandlerSystem class. Toolkit Applet Example:

 private static final byte MY_TAG = (byte)0x54;
 private byte[] data;
 data = new byte[32];

 void processToolkit(byte event) throws ToolkitException {
     // get the EnvelopeHandler system instance
     EnvelopeHandler theEnv = EnvelopeHandlerSystem.getTheHandler();
     // look for MY_TAG TLV
     if (theEnv.findTLV(MY_TAG, (byte)1) != TLV_NOT_FOUND) {
         // check first element byte
         if (theEnv.getValueByte((short)0) == (byte)1) {
             // copy element part into data buffer
             theEnv.copyValue((short)1,
                              data,
                              (short)0,
                              (short)(theEnv.getValueLength() - 1));
         }
     }
 }
 

See Also:

ViewHandler, EnvelopeHandlerSystem

Method Summary

byte	getChannelIdentifier() Returns the channel identifier value from the first Channel status TLV element in the current Envelope data field.
short	getChannelStatus(byte channelIdentifier) Returns the value of the first Channel Status TLV element whose channel identifier is equal to the channelIdentifier parameter.
byte	getItemIdentifier() Returns the item identifier byte value from the first Item Identifier TLV element in the current Envelope data field.

Methods inherited from interface uicc.toolkit.BERTLVViewHandler

getSize, getTag

Methods inherited from interface uicc.toolkit.ViewHandler

compareValue, copy, copyValue, findAndCompareValue, findAndCompareValue, findAndCopyValue, findAndCopyValue, findTLV, getCapacity, getLength, getValueByte, getValueLength, getValueShort

Method Detail

getItemIdentifier

byte getItemIdentifier()
                       throws ToolkitException

Returns the item identifier byte value from the first Item Identifier TLV element in the current Envelope data field. If the element is available it becomes the TLV selected.

Returns:

item identifier

Throws:

ToolkitException - with the following reason codes:

• UNAVAILABLE_ELEMENT in case of unavailable TLV element
• OUT_OF_TLV_BOUNDARIES if the item identifier byte is missing in the Item Identifier Comprehension TLV.

getChannelIdentifier

byte getChannelIdentifier()
                          throws ToolkitException

Returns the channel identifier value from the first Channel status TLV element in the current Envelope data field. If the element is available it becomes the currently selected TLV.

Returns:

channel identifier

Throws:

ToolkitException - - with the following reason codes:

• UNAVAILABLE_ELEMENT in case of unavailable TLV element

OUT_OF_TLV_BOUNDARIES if the Comprehension TLV Channels Status length is equal to zero.

getChannelStatus

short getChannelStatus(byte channelIdentifier)
                       throws ToolkitException

Returns the value of the first Channel Status TLV element whose channel identifier is equal to the channelIdentifier parameter. If the element is available it becomes the currently selected TLV element.

Parameters:

channelIdentifier - the channel number

Returns:

channel identifier and status : MSB = byte 1 of the Channel Status TLV value (byte 3 of the Channel Status TLV element), LSB = byte 2 of the Channel Status TLV value (byte 4 of the Channel Status TLV element).

Throws:

ToolkitException - with the following reason codes:

• UNAVAILABLE_ELEMENT if no Channel Status TLV element with the right identifier could be found
• OUT_OF_TLV_BOUNDARIES if a Channel Status TLV element with the right identifier could be found but its value is less than 2 bytes long