Question

I have 3 projects which is depending on the same shared library.

There is a singleton class inside the library which is providing globally shared objects across the project, anyway this globally shared objects is instances of a classes, which is different, depending on the platform, for instance :

on mobile application:

public static var message : TMobileMessage;

on desktop application:

public static var message : TDesktopMessage;

on web applcation:

public static var message : TWebApplication;

• How to implement condition compiling on declarations, since the follow code doesn’t works :

  If( CONFIG::applicationType == 'mobile' )
      public static var message : TMobileMessage;
  else
     If( CONFIG::applicationType == 'desktop' )
         public static var message : TDesktopMessage;
     else
         If( CONFIG::applicationType == 'web' )
             public static var message : TWebApplication;
  

Answer 1

I would suggest the following.

1. Use conditional compiler’s declarations like this:

   CONFIG::MOBILE {
   public static var message : TMobileMessage;
   }

   CONFIG::DESKTOP {
   public static var message : TDesktopMessage;
   }

   CONFIG::WEB {
   public static var message : TWebApplication;
   }

2. Create a flex-config.xml for each of the configs. Declare these conditionals in each of the config.xml:

flex-config-mobile.xml

<compiler>
        <define>
            <name>CONFIG::MOBILE</name>
            <value>true</value>
        </define>
        <define>
            <name>CONFIG::DESKTOP</name>
            <value>false</value>
        </define>
        <define>
            <name>CONFIG::WEB</name>
            <value>false</value>
        </define>
</compiler>

flex-config-desktop.xml

<compiler>

        <define>
            <name>CONFIG::MOBILE</name>
            <value>false</value>
        </define>
        <define>
            <name>CONFIG::DESKTOP</name>
            <value>true</value>
        </define>
        <define>
            <name>CONFIG::WEB</name>
            <value>false</value>
        </define>

</compiler>

flex-config-web.xml

<compiler>

        <define>
            <name>CONFIG::MOBILE</name>
            <value>false</value>
        </define>
        <define>
            <name>CONFIG::DESKTOP</name>
            <value>false</value>
        </define>
        <define>
            <name>CONFIG::WEB</name>
            <value>true</value>
        </define>

</compiler>

1. Use the appropriate flex-config in a build script or your IDE.