Passing Parameters to Non-GUI Applications using jadclient

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Passing Parameters to Non-GUI Applications using jadclient

For details about running the jadclient program to execute a non-GUI application within your JADE code, see "Running a Non-GUI Client Application using jadclient".

To run a non-GUI application defined in your JADE schema, specify the following parameters in the jadclient program.

jadclient path=database-path
          ini=jade-initialization-file
          schema=schema-name
          app=application-name
          endJade
          [command-line-arguments]

Enclose any command line arguments that contain spaces in double (" ") or single (' ') quotation marks.

Command line arguments specified after the endJade parameter are passed as a huge string array to the initialize method of your application, which must have a signature that contains only an initializeParameter parameter; that is:

method-name(initializeParameter: Object);

An exception is raised if the initialize method does not have only one parameter of type Object.

If you do not specify any command line arguments, the initialize method signature of your application should not have any parameters. Each argument is limited to the maximum size of a string in a huge string array, which is currently 2047 characters.

The jadclient program treats processing arguments enclosed in double (" ") or single (' ') quotation marks after the endJade parameter as single-string entries in the huge string array. The handling of strings in this huge string array is application-specific. For example, path= "program files" is treated as a two-string entry and "path= program files" is treated as a one-string entry. How these entries are handled is determined by your application.

The following example shows an Application class initialization method that writes a jadclient command line to the JADE Interpreter Output Viewer.

jadclient(obj: Object);
vars
    cmdLine : HugeStringArray;
    count   : Integer;
begin
    if obj = null then
        write "No command line";
    else
        cmdLine := obj.HugeStringArray;
        foreach count in 1 to cmdLine.size do
            write "Arg[" & count.String & "] = '" & cmdLine[count] & "'";
        endforeach;
    endif;
    terminate;
end;

The following example shows the use of the jadclient program to output six arguments to the JADE Interpreter Output Viewer, based on the Application::jadclient method in the previous example.

c:\jade\bin\jadclient path=c:\jade\system ini=c:\jade\system\jade.ini schema=TestClient app=TestClientA endJade 1 2 three ix "a b" "Second string but not in the violas "

The command line arguments in this example are passed as a huge string array to the Application::jadclient method in the example earlier in this subsection, resulting in the following displayed in the JADE Interpreter Output Viewer.

Arg[1] = '1'
Arg[2] = '2'
Arg[3] = 'three'
Arg[4] = 'ix'
Arg[5] = 'a b'
Arg[6] = 'Second string but not in the violas'

See also "Extracting Schemas as a Non-GUI Application", in Chapter 10 of the JADE Development Environment User’s Guide.