Is there an example that illustrates how to use types with extensibility and values with unknown extension additions? Is there an example that illustrates the "RelaySafe" Mechanism?

Yes, there is an example that illustrates how to work with extensible types. The example illustrates the -relaySafe ASN.1 compiler option. With this option the ASN.1/Java compiler generates information that causes the unknown extension additions to be preserved by the decoder for each ASN.1 type which is extensible. The relay.asn file consists of 2 modules, one of which has been defined as version 1 with possible extensions and the other of which has been defined as version 2 with a known extension. The and represent the two versions, sending a message back and forth demonstrating the communication between versions where one version knows about extensions that are unknown to the other version.

To make it easier for you to run the example from the command line, two scripts are included, a Unix .sh and a Windows .bat.

To run it on a Unix platform, cd to the "relay" directory and type:


To run it on Windows, cd to the "relay" directory and type:


To do a cleanup on Unix, type:

./ cleanup

To do a cleanup on Windows, type:

run cleanup

To download please click the file below: 7KB

The samples included with some of the Knowledge Center answers are meant for your general understanding of the OSS products. Different versions of the products might produce slightly different outputs. Consult the products documentation and samples for the most up-to-date products information and code examples.

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