FUJITSU J Adapter Class Generator - Manual (Page 21)

Chapter 3. Developing Programs 21
Example:
When an application uses only the println (Object) method of the java.io.PrintStream
class, specify as follows:
C:\> java2cob -r java.io.PrintStream -gm "println(java.lang.Object)"
Specifying the -om Option or the "Option ReduceClass"
Parameter
Specifying the -om option or the "Option ReduceClass" parameter can reduce the
number of adapter classes generated. To check for parameter validity at method
invocation, the J adapter class generator generates adapter classes corresponding to
individual parameters. Thus many adapter classes are generated for one class.
When the -om option or the "Option ReduceClass" parameter is specified, all object-
type method parameters are mapped to the java-lang-Object class. This function
suppresses the generation of adapter classes corresponding to the method
parameters and thereby reduces the number of adapter classes generated.
Notes:
• When the method of the adapter class generated with the -om option or the
"Option ReduceClass" parameter specified is invoked, BY CONTENT must be
specified as an object reference parameter.
• When the -om option or the "Option ReduceClass" parameter is specified, the
object reference types of method parameters excluding the return value become
java-lang-Object and therefore the original parameter types become uncertain.
Therefore, for a parameter whose object reference type becomes java-lang-
Object, a parameter name is generated according to the following rules so that
the original type information is included in the parameter name.
Pn-ClassName
• P is followed by a parameter serial number (1 to 99).
• The hyphen "-" is followed by an external class name excluding a package name
after conversion into uppercase.
• A parameter name exceeding 30 characters is truncated after the 30th character.
Example:
When the -om option or the "Option ReduceClass" parameter is not specified,
adapter class source java-io-PrintStream.cob of the java.io.PrintStream class
becomes as shown below, and the java-io-OutputStream class is required.
...
REPOSITORY.
CLASS J-OUTPUTSTREAM AS "java-io-OutputStream"
...
LINKAGE SECTION.
01 PARA-1 OBJECT REFERENCE J-OUTPUTSTREAM.
...
When the -om option or the "Option ReduceClass" parameter is specified, the
parameter becomes the java-lang-Object type. Therefore, the java-io-OutputStream
class is not required or generated.