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By: jpsoriano
when I try to access a page with a displaytag, that jsp appears in blank and
the following error is showed:
java.lang.NullPointerException
at
org.displaytag.model.RowSorter.checkNullsAndCompare(RowSorter.java:176)
at org.displaytag.model.RowSorter.compare(RowSorter.java:144)
at java.util.Arrays.mergeSort(Unknown Source)
at java.util.Arrays.mergeSort(Unknown Source)
at java.util.Arrays.sort(Unknown Source)
at java.util.Collections.sort(Unknown Source)
at org.displaytag.model.TableModel.sortRowList(TableModel.java:451)
at org.displaytag.model.TableModel.sortFullList(TableModel.java:486)
at org.displaytag.tags.TableTag.setupViewableData(TableTag.java:1514)
at org.displaytag.tags.TableTag.doEndTag(TableTag.java:1185)
...
I have checked that error is produced because the attribute comparator of
RowSorter
is null .That happens when, the table is drawn for first time and the attribute
rowNumber of TableTag isn't equal to 1 (the header row isn't drawn so the
comparator
is null or I think so). But this error doesn't appear always for the same page
and the same data.
When it doesn't work, reloading the page it works again.
I use struts, spring and hibernate and the version 1.1 of displaytags but i
have proved with the version 1.1.1 too. I hope that someone can help me. Thanks.
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