There is some documentation from the author of this component available at https://tawus.wordpress.com/2012/11/25/scrolling-pages-tapestry5-onscrollbeyond/
if you have a look at the source doc, https://github.com/got5/tapestry5-jquery/blob/master/src/main/java/org/got5/tapestry5/jquery/components/PageScroll.java you will find the following code @Parameter(value = "literal:[]") private Object[] context; I guess that you get your code form the sample at https://github.com/got5/tapestry5-jquery/blob/master/src/test/resources/org/got5/tapestry5/jquery/pages/PageScroll.tml Your error message java.lang.RuntimeExceptionCoercion of [] to type java.lang.Integer (via String --> Long, Long --> Integer) failed: For input string: "[]" java.lang.NumberFormatExceptionFor input string: "[]" come from the default value of the parameter context you have removed from the template. see also https://tapestry.apache.org/component-parameters.html for more details about parameter binding. for questions related to tapestry5 jquery component, I suggest you to open an issue at https://github.com/got5/tapestry5-jquery/issues. 2016-03-15 10:13 GMT+01:00 Robert Jakeš <jakesrob...@gmail.com>: > I am trying to use tapestry5 jquery component PageScroll for infinite > scrolling. > > - tapestry5 - 5.3.8 > - tapestry5-jquery - 3.4.2 > > So far i got this: > > public class PageScrollDemo { > private static final int PageSize = 100; > > @Property > private int value; > > @OnEvent("nextPage") > List<Integer> moreValues(int pageNumber) throws InterruptedException { > List<Integer> values = new ArrayList<Integer>(); > int first = pageNumber * PageSize; > for(int i = 0; i < PageSize; ++i){ > values.add(first + i); > } > > Thread.sleep(1000); > return values; > }} > > PageScrollDemo.tml > > <html xmlns:t='http://tapestry.apache.org/schema/tapestry_5_3.xsd > '><body><h1>BEGIN</h1><ul> > <li t:type='jquery/pagescroll' row='value' scroller='scroller' > zone='zone' pageNumber="1"> > > <li>${value}</li> > </li> > <li class='zone' t:type='zone' t:id='zone'/></ul><div > id='scroller'></div><h1>END</h1></body></html> > > But i get this error > > java.lang.RuntimeExceptionCoercion of [] to type java.lang.Integer > (via String --> Long, Long --> Integer) failed: For input string: "[]" > java.lang.NumberFormatExceptionFor input string: "[]" > Filter stack frames Stack trace > > > java.lang.NumberFormatException.forInputString(NumberFormatException.java:65) > java.lang.Long.parseLong(Long.java:589) > java.lang.Long.<init>(Long.java:965) > > As far i understand, tapestry is trying to pass parameter "[]" to the > method moreValues(int), which fails. > > My question is why is not passing String "1" (pageNumber), which can be > casted to int? > > My second question is why is even pageNumber mandatory in > PageScrollDemo.tml? If i remove params from moreValues(), i get this: > > trace > > Triggering event 'scroll' on PageScrollDemo:pagescroll > > org.apache.tapestry5.runtime.ComponentEventExceptionFailure writing > parameter 'pageNumber' of component PageScrollDemo:pagescroll: Literal > values are not updateable. > > Could somebody please explain me how to use Pagescroll? >
