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Code Block
function nullToDash() { var nr = arguments[0]; if(nr == null) return '-'; return nr; } function dashToNull() { var nr = arguments[0]; if(nr == '-') return null; return nr; }

Configuring the UI converter of field 'fldAge' format property:

Code that tests the actual/UI value:

Code Block

/** @type {JSRecord<db:/example_data/employees>}*/
var rec = foundset.getSelectedRecord();
if(rec.age == null) {
	application.output('Actual data: null')
	application.output('UI data:' + elements.fldAge)
}

The image below shows how data is displayed in the UI:

Image Added

UI Converter from java code (plugin)

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convertFromObject()
Convert from UI value to dataprovider value
convertToObject()
Converts from dataprovider value to UI value
type (one of TEXT, INTEGER, NUMBER, DATETIME or MEDIA)
The UI data type (so the resulting type of the convertToObject()).

Java Code Example

This is an example of a plugin that delivers a converter from joda time (which has support for time persiods) to java-util-date (which is supported by Servoy UI elements) time.
The dataprovider type will be MEDIA because Servoy does not natively support.

Code Block

private static final IUIConverter[] UI_CONVERTERS = new IUIConverter[] { JodaToDateConverter.INSTANCE };
 
public IUIConverter[] getUIConverters()
{
    return UI_CONVERTERS;
}
 
static class NrToJodaConverter implements ITypedColumnConverter
{
    static final NrToJodaConverter INSTANCE = new NrToJodaConverter();
 
    public Object convertToObject(Map<String, String> props, int column_type, Object dbvalue) throws Exception
    {
        if (dbvalue == null)
        {
            return null;
        }
        return new DateTime(Utils.getAsLong(dbvalue));
    }
 
    public Object convertFromObject(Map<String, String> props, int column_type, Object obj) throws Exception
    {
        if (obj instanceof DateTime)
        {
            return Long.valueOf(((DateTime)obj).getMillis());
        }
        return obj; // or throw an exception??
    }
 
    public Map<String, String> getDefaultProperties()
    {
        return null;
    }
 
    public int[] getSupportedColumnTypes()
    {
        return new int[] { IColumnTypes.INTEGER };
    }
 
    public String getName()
    {
        return getClass().getSimpleName();
    }
 
    public int getToObjectType(Map<String, String> props)
    {
        // Servoy does not understand joda time natively.
        return IColumnTypes.MEDIA;
    }
}
 
static class JodaToDateConverter implements IUIConverter
{
    static final JodaToDateConverter INSTANCE = new JodaToDateConverter();
 
    public Object convertFromObject(Map<String, String> props, int input_type, Object converted) throws Exception
    {
        if (converted instanceof Date)
        {
            return new DateTime(((Date)converted).getTime());
        }
        return converted; // or return null or throw an exception??
    }
 
    public Object convertToObject(Map<String, String> props, int input_type, Object input) throws Exception
    {
        if (input instanceof DateTime)
        {
            return new Date(((DateTime)input).getMillis());
        }
        return input; // or return null or throw an exception??
    }
 
    public Map<String, String> getDefaultProperties()
    {
        return null;
    }
 
    public int[] getSupportedDataproviderTypes()
    {
        // Servoy does not understand joda time natively.
        return new int[] { IColumnTypes.MEDIA };
    }
 
    public String getName()
    {
        return getClass().getSimpleName();
    }
 
    public int getToObjectType(Map<String, String> props)
    {
        return IColumnTypes.DATETIME;
    }
}

Solution model

UI converters are currently not supported by the solution model.

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Versions Compared

Old Version 125

New Version 126

Key

UI Converter from java code (plugin)

Solution model