The x...y syntax is limited to constant values for x and y. I think a future release of Tapestry will increase the power of the built-in expression language, but for the moment, there you go.
The x..y syntax is ultimately converted into an instance of IntegerRange, so one way would be to create a getter method that created and returned an instance of IntegerRange directly, then change the source parameter of the Loop component to point to this property. However, IntegerRange is an internal class, so be aware that it is free to change at any time. Or you could return a List<Integer> or int[] of the desired values from the method. On Nov 6, 2007 9:02 AM, Tobias Wehrum <[EMAIL PROTECTED]> wrote: > Hi all, > > I am currently working with the tutorial 1 at the Tapestry 5 homepage ( > http://tapestry.apache.org/tapestry5/tutorial1/hilo.html ). > > Now, one of the further tasks there is "As we guess, we're identifying > ranges of valid and invalid numbers. Can you only show valid guesses to > the user?" > ...so, setting a loop (which counted before simply from 1 to 10) to > count from one variable to another variable. > > My guess was that I just have to replace > <t:loop source="1..10" value="guess"> > (which works) with > <t:loop source="${rangeStart}..${rangeEnd}" value="guess"> > > Well, seems to be wrong. I get the following application exception: > > org.apache.tapestry.ioc.internal.util.TapestryException > Failure writing parameter value of component Guess:loop: Coercion of > 1..10 to type int (via String --> Long, Long --> Integer) failed: For > input string: "1..10" > (marked is the line shown above). > > So, he DOES replace the variables right, but that doesn't seem to be the > same as "1..10" anymore. > > How can I solve this problem? > > Thanks in advance, > Tobias > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > -- Howard M. Lewis Ship Partner and Senior Architect at Feature50 Creator Apache Tapestry and Apache HiveMind --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
