The following table shows a summary of the command line options that have meaning when Java code generation is selected:
| Option | Argument | Description |
|---|---|---|
| -asnstd |
x680 |
This option instructs the compiler to parse ASN.1 syntax conforming to the specified standard. x680 (the default) refers to modern ASN.1 as specified in the ITU-T X.680-X.690 series of standards. x208 refers to the now deprecated X.208 and X.209 standards. This syntax allowed the ANY construct as well as unnamed fields in SEQUENCE, SET, and CHOICE constructs. This option also allows for parsing and generation of code for ROSE OPERATION and ERROR macros and SNMP OBJECT-TYPE macros. The mixed option is used to specify a source file that contains modules with both X.208 and X.680 based syntax. |
| -ber | None | This option instructs the compiler to generate functions that implement the Basic Encoding Rules (BER) as specified in the ASN.1 standards. |
| -cer | None | This option instructs the compiler to generate functions that implement the Canonical Encoding Rules (CER) as specified in the ASN.1 standards. |
| -cldc | None | This option instructs the compiler to generate Java Micro Edition Connected Limited Device Configuration (CLDC) 1.1 compatible code. See the chapter Java Micro Edition Support for more information. |
| -compact | None | This option instructs the compiler to generate more compact code at the expense of some constraint and error checking. This is an optimization option that should be used after an application is thoroughly tested. |
| -compare | None | This option is used to generate a comparison method (Equals) in the generated classes. |
| -compat | <versionNumber> |
Generate code compatible with an older version of the compiler. The compiler will attempt to generate code more closely aligned with the given previous release of the compiler. <versionNumber> is specified as x.x (for example, -compat 5.2) |
| -config | <filename> | This option is used to specify the name of a file containing configuration information for the source file being parsed. A full discussion of the contents of a configuration file is provided in the Compiler Configuration File section. |
| -depends | None | This option instructs the compiler to generate a full set of Java source files that contain only the productions in the main file being compiled and items those productions depend on from IMPORT files. |
| -der | None | This option instructs the compiler to generate functions that implement the Distinguished Encoding Rules (DER) as specified in the ASN.1 standards. |
| -dirs | None | This is a Java option that causes a subdirectory to be created to hold each of the generated Java source files for each module in an ASN.1 source file. |
| -events | None | Generate extra code to invoke user defined event and error handler callback methods (see the Event Handlers section). |
| -genant | None | Generate a build script (build.xml) that is compatible with the Ant toolchain. |
| -genbuild | None | This option is used to generate a build script for compiling generated classes. |
|
-genPrint |
None | This option specifies that print methods should be generated. Print functions are debug functions that allow the contents of generated type variables to be written to stdout. |
| -getset | None | This option is used to generate protected member variables and get/set methods for accessing the variables. By default, member variables are declared to be public and they are accessed directly by application code. |
| -I | <directory> | This option is used to specify a directory that the compiler will search for ASN.1 source files for IMPORT items. Multiple –I qualifiers can be used to specify multiple directories to search |
| -java4 | None | Generate Java source code compatible with the Java runtime environment version 1.4.x. By default, code is generated that is compatible with versions 1.5 and higher. |
| -lax | None | This option instructs the compiler to not generate code to check constraints. When used in conjunction with the –compact option, it produces the smallest code base for a given ASN.1 specification |
| -list | None | Generate listing. This will dump the source code to the standard output device as it is parsed. This can be useful for finding parse errors. |
| -nodecode | None | This option suppresses the generation of decode functions. |
| -noencode | None | This option suppresses the generation of encode functions. |
| -noIndefLen | None | This option instructs the compiler to omit indefinite length tests in generated decode functions. These tests result in the generation of a large amount of code. If you know that your application only uses definite length encoding, this option can result in a much smaller code base size. |
| -noOpenExt | None | This option instructs the compiler to not add an open extension element in constructs that contain extensibility markers. The purpose of the element is to collect any unknown items in a message. If an application does not care about these unknown items, it can use this option to reduce the size of the generated code. |
| -o | <directory> | This option is used to specify the name of a directory to which all of the generated files will be written. |
| -pdu | <typeName> |
Designate given type name to be a Protocol Definition Unit (PDU) type. By default, PDU types are determined to be types that are not referenced by any other types within a module. This option allows that behavior to be overridden. The * wildcard character may be specified for <typeName> to indicate that all productions within an ASN.1 module should be treated as PDU types. |
| -per | None | This option instructs the compiler to generate functions that implement the Packed Encoding Rules (PER) as specified in the ASN.1 standards. |
| -pkgname | <packageName> | This is a Java option that allows the entire Java package name to be changed. Instead of the module name, the full name specified using this option will be used. This option cannot be used in conjunction with –pkgpfx option. |
| -pkgpfx | <prefixName> | This is a Java option for adding a prefix in front of the assigned Java package name. By default, the Java package name is set to the module name. If the package is embedded within a hierarchy, this option can be used to set the other directory names that must be added to allow Java to find the .class files. |
| -reader | None | This option is used to generate a sample reader program to decode data. |
| -shortnames | None | This option is used to change the names generated by compiler for embedded types in constructed types. This option is required to handle the limit on the size of filenames in certain situations. With this option, the generated code filenames would be shorter than without this option. |
| -stream | None | This option instructs the compiler to generate stream-based encoders/decoders instead of memory buffer based. This makes it possible to encode directly to or decode directly from a source or sink such as a file or socket. In the case of BER, it will also cause forward encoders to be generated, which will use indefinite lengths for all constructed elements in a message. |
| -tables | None | This option is used to generate additional code for the handling of table constraints as defined in the X.682 standard. |
| -uniquenames | None |
This option instructs the compiler to automatically generate unique names to resolve name collisions in the generated code. Name collisions can occur, for example, if two modules are being compiled that contain a production with the same name. A un ique name is generated by prepending the module name to one of the productions to form a name of the form <module>_<name>. Note that name collisions can also be manually resolved by using the typePrefix, enumPrefix, and valuePrefix configuration items (see the Compiler Configuration File section for more details) |
| -warnings | None | Output information on compiler generated warnings. |
| -writer | None | This option is used to generate a sample writer program to encode data. |
| -xer | None | This option instructs the compiler to generate functions that implement the XML Encoding Rules (XER) as specified in the ASN.1 standards. |
| -xml | None | This option instructs the compiler to generate functions that implement the XML Encoding Rules (XML) as specified in the World-Wide Consortium (W3C). Related XML Schema can be produced by using the -xsd command line option. |