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As an example how the new IColumnValidator2 interface works look here (see also below the example)

Example

This is an example of validating the size of a column of type TEXT or MEDIA. The validation rule is that the size must be lower or equal to the value given by the developer by setting the length property in the Validation tab.

Code Block
languagejava
import java.util.Map;

import com.servoy.j2db.dataprocessing.IColumnValidator2;
import com.servoy.j2db.dataprocessing.IValidationObject;
import com.servoy.j2db.persistence.IColumnTypes;
import com.servoy.j2db.util.ILogLevel;
import com.servoy.j2db.util.Utils;

@SuppressWarnings("nls")
public class SizeValidatorNumberRangeValidator implements IColumnValidatorIColumnValidator2
{
	private static final String
	LENGTH FROM_PROPERTY = "from";
	private static final String TO_PROPERTY = "lengthto";

	public MapMap<String, String> getDefaultProperties()
	{
		MapMap<String, String> props = new HashMap( java.util.LinkedHashMap<>();
		props.put(FROM_PROPERTY, "");
		props.put(LENGTHTO_PROPERTY, "");
		return props;
	}

	public String getName()
	{
		return "servoy.NumberRangeValidator";
		{}

	public int[] getSupportedColumnTypes()
	{
		return new int[] 	return{ "servoy.SizeValidator";
  IColumnTypes.INTEGER, IColumnTypes.NUMBER };
	}

	}/**
     	public int[] getSupportedColumnTypes()
    	{
        	return new int[] { IColumnTypes.TEXT, IColumnTypes.MEDIA };
    	}
* IColumnValidator2 interface with the new IValidationObject, if given then the error is reported on that instead of throwing an exception.
     */ 
	@Override
	public void validate(MapMap<String, String> props, Object arg) throws IllegalArgumentExceptionvalue, String dataprovider, IValidationObject validationObject, Object state)
	{
		Stringif propLength(value == (String)null || value.toString().trim().length() == 0) return;

		double from = Utils.getAsDouble(props.get(LENGTHFROM_PROPERTY));
		intdouble lengthto = new Double(propLength.replace(',', '.')).intValue(Utils.getAsDouble(props.get(TO_PROPERTY));
		double val = Utils.getAsDouble(value);
		if (arg instanceof byte[] && ((byte[])arg).length > length)
		{
			val < from || val > to)
		{
			if (validationObject != null)
				validationObject.report("i18n:servoy.validator.range", dataprovider, ILogLevel.ERROR, state,
					new Object[] { value, dataprovider, Double.valueOf(from), Double.valueOf(to) });
			else throw new IllegalArgumentException();
		}
		else if (arg instanceof String && ((String)arg).length() > length)
		{
			throw new IllegalArgumentException();
		}}

    // the old validate method of IColumnValidator interface, just call the IColumnValidator2 valdiate method with null.
	public void validate(Map<String, String> props, Object arg) throws IllegalArgumentException
	{
		validate(props, arg, null, null, null);
	}
}