Contactless Communication API - Oracle Software Delivery Cloud

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Contactless Communication API
OverviewIntroductionGoalsThis specification defines the Contactless Communication API, a Java ME optional package containing an applicationprogramming interface that allows applications to access information on contactless targets, such as RFID tags and barcodes.Contactless communication in this specification is based on the Radio Frequency IDentification (RFID) technology. Exceptionsto this are visual tags (bar codes) that use camera technology. RFID technology can be used to communicate with RFIDtags and external smart cards. RFID is widely used, for example, in item identification and article surveillance. Each RFIDtarget has a unique identification number that can be used to identify the tagged object. RFID readers are used to readthe data from the target and to write data to them. The communication distance is usually less than 10 centimeters. TheRFID readers use the 13.56 MHz radio frequency in the communication.Connecting to a web page by scanning an RFID or a visual tag (bar code) in the corner of a movie poster or calling to afriend by touching a RFID tag that contains the phone number are some of the use cases the Contactless CommunicationAPI enables. This API provides a mechanism to discover contactless targets and communicate with them.NFC Forum specifies a data packaging format (NDEF) to exchange information between an NFC device and another NFCdevice or with a RFID tag. This API takes advantage of this data formatting by providing a connection to any physical targetthat supports the NDEF data formatting defined in the NFC Forum. Using this NDEF data format, the application developercan exchange NDEF formatted data with a target without knowing its physical type.This API allows communication with external smart cards by providing a discovery mechanism for them. The actualcommunication with the ISO14443 compliant smart cards is done using APDU commands. A device, that contains RFIDhardware, can emulate a contactless smart card to an external reader device. This feature is called card emulation mode.For example, with transportation tickets the device contains bus tickets and the external reader in the bus reads one ticketfrom the device. For these situations the API provides a notification to the application that the secure elements in thedevice have been accessed through the RFID hardware.The goal of the Contactless Communication API is to provide access to the information stored on various contactless targets.The design of the API must make it easy and flexible to add new contactless targets to this framework. The API must alsoprovide information about the contactless targets supported by the implementation.Structure of the APIThe classes and interfaces in this specification are divided into five packages. The functionalities related to different targetsare separated into their own packages. This division makes it easier to manage the mandatory and optional parts of theAPI. The packages are listed below:• javax.microedition.contactless provides target discovery and classes common to all targets• javax.microedition.contactless.ndef contains classes and interfaces needed to communicate with tagsthat have NDEF formatted data• javax.microedition.contactless.rf allows communication with RFID tags that do not have NDEF formatteddata• javax.microedition.contactless.sc enables communication with external smart cards• javax.microedition.contactless.visual allows reading and generating visual tagsMandatory and optional partsThe API implementation must include all classes and interfaces defined in this specification, but some of the functionalitiesmay be left unimplemented. The API implementation selects the physical target types it supports. This selection determinesthe list of packages whose functionalities must be fully implemented. If the functionality in an optional package isimplemented, the corresponding target must be supported. If a target is not supported an exception must be thrown if2
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Package javax.microedition.contactl
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ImagePropertiesImageProperties —
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SymbologyManagerSymbologyManager
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VisualTagCodingExceptionInheritance
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Appendix A. SecurityThis appendix d
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}* Creates a new ContactlessPermiss
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}/*** Returns the hash code value f
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import javax.microedition.io.GCFPer
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* @author Nokia Corporation* @versi
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Appendix B. Launching applications
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Appendix C. Unique identifiers of t
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Appendix E. Examples of RFID commun
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}if (target != null) {// do the com
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equals, 40exchangeData, 50externalR
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Contactless Communication API - Oracle Software Delivery Cloud

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