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Custom FILTER_COMPARATOR not called [message #1472389]

Thu, 13 November 2014 21:03

Thomas Kernstock

Messages: 27
Registered: July 2009
Location: Vienna

Junior Member

Hi,

I'm trying to implement my own filtercomparator but it seems that is never gets called.
When I debug the Example "FilterRowGridExample" at line 94 the getIngnorecaseComparator() is called so it should be registered - shouldn't it?
........
// Configure custom comparator on the rating column
configRegistry.registerConfigAttribute(FilterRowConfigAttributes.FILTER_COMPARATOR,
getIngnorecaseComparator(),
DisplayMode.NORMAL,
FilterRowDataLayer.FILTER_ROW_COLUMN_LABEL_PREFIX + 2);
..........

private static Comparator<?> getIngnorecaseComparator() {
return new Comparator<String>() {
public int compare(String o1, String o2) {
System.out.println(o1+"/"+o2);
return o1.compareToIgnoreCase(o2);
}
};
};

Now I would expect that the compare Method ist called everytime I enter a value in the filterrow for rating and press enter. But it isn't.

Even if I completly remove the lines for configRegistry.registerConfigAttribute(... the row gets filtered correctly. So it seems that the FilterComparator isn't used at all.

Is this a bug or do I simply missunderstand the concept?
How can I implement a CustomFilter for one of the rows?

Thanx
Thomas

PS: I'm using Nattable Version 1.2.0.201410270901, GlazedList 1.9.0, Java 1.8.0_25

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Re: Custom FILTER_COMPARATOR not called [message #1472408 is a reply to message #1472389]

Thu, 13 November 2014 21:22

Dirk Fauth

Messages: 2803
Registered: July 2012

Senior Member

from looking into the code it seems the comparator is not used because a TextMatcherEditor is used since a simple text matching is performed.
Using another match mode that accepts matchers like >, < etc. would create a ThresholdMatcherEditor that makes use of the comparator.

So if you want to name it a bug then it is a bug in the example.

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Re: Custom FILTER_COMPARATOR not called [message #1472417 is a reply to message #1472408]

Thu, 13 November 2014 21:30

Thomas Kernstock

Messages: 27
Registered: July 2009
Location: Vienna

Junior Member

thank you for the quick answer.

What I would like to achive is a CustomFilter that gets a value from a Dropdown and compares it to the fieldvalue.
The Dropdown contains ("IET","DO","D","O","I","E","T")
=> if I choose "IET" all rows containig either I,E or T in the column should show up. If I choose "I" only the rows with "I" should show up.....

Unfortunately I can't find any example or documentation on that topic and since the FILTER_COMPARATOR isn't used I have no clue how to do that.
br
Thomas

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Re: Custom FILTER_COMPARATOR not called [message #1472796 is a reply to message #1472417]

Fri, 14 November 2014 05:08

Dirk Fauth

Messages: 2803
Registered: July 2012

Senior Member

A comparator is used for sorting in Java. So the filter comparator is intended to sort the filter result and has nothing to do with filtering itself.

What you are looking for is an excel like filter, since there should be a dropdown with multi selection. If you want to use that have a look at the corresponding examples in the Tutorial examples section.

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Re: Custom FILTER_COMPARATOR not called [message #1472801 is a reply to message #1472796]

Fri, 14 November 2014 05:11

Dirk Fauth

Messages: 2803
Registered: July 2012

Senior Member

Oh, just saw you don't want multi selection. In that case I guess you need to implement a custom IFilterStrategy that transforms the value into several single values on apply. Extending the default might be worth a look.

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Re: Custom FILTER_COMPARATOR not called [message #1472930 is a reply to message #1472796]

Fri, 14 November 2014 07:49

Thomas Kernstock

Messages: 27
Registered: July 2009
Location: Vienna

Junior Member

Dirk Fauth wrote on Fri, 14 November 2014 00:08

What you are looking for is an excel like filter, since there should be a dropdown with multi selection. If you want to use that have a look at the corresponding examples in the Tutorial examples section.

Indeed I would have liked that for this particular column only, but what I saw I have to use Excelfilters on all columns which is not what I want.

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Re: Custom FILTER_COMPARATOR not called [message #1472935 is a reply to message #1472801]

Fri, 14 November 2014 07:51

Thomas Kernstock

Messages: 27
Registered: July 2009
Location: Vienna

Junior Member

Dirk Fauth wrote on Fri, 14 November 2014 00:11

Extending the default might be worth a look.

Thank you for the hint. Do you know if there is an example for that?

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Re: Custom FILTER_COMPARATOR not called [message #1472952 is a reply to message #1472935]

Fri, 14 November 2014 08:08

Dirk Fauth

Messages: 2803
Registered: July 2012

Senior Member

No there is no example for that. But there are internal classes that extend DefaultGlazedListsFilterStrategy for the combo boxes or for adding static filters

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