From: Jim A. <ji...@tr...> - 2001-03-22 19:01:45
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Ronald_Male@NexPress.com wrote: > > I have a bunch of properties that I get from the system using Java code, > since that is what handles properties. The data I get back is of type > java.lang.String. These things are used all over the place. > > Which makes more sense: write all the code in Java and just drive it > with Jython, or convert the String data to Python strings? In the latter > case, how do I do the conversion? > Of course it depends on your purpose, but I would lean toward putting the info into Jython. Here's a cut/paste of some of my code: import org.python.util.PythonInterpreter; import org.python.core.*; ... PythonInterpreter python; python = new PythonInterpreter(); python.set("debugLevel", new Integer(debugLevel) ); // must pass Object not 'int' python.set("amount", new PyFloat( Double.parseDouble( amountString ) ) ); // so Jython can do math directly ArrayList errorList = new ArrayList(); python.set("errorList", errorList); Note that in the last example, the pointer to the ArrayList is sent to Jython: in the Jython code it calls other Java code using the same pointer ('errorList'), and the Java code actually 'add's to the errorList; i.e. the pointer is just 'passed through' Jython. This all works great and fast since when it actually runs, Jython code is just Java Bytecodes ! Your other option is just to call the Java classes to get the properties from Jython directly. See Bruce Eckel's Jython info below for more info. -- __o Jim Adrig _ \<,_ ji...@tr... ' `/ ' ` ___________ `-' `-' Java/Jython intergration: Chapter 9 at: http://www.bruceeckel.com/TIPatterns/index.html |