package module.fileManagement.presentationTier.component.fields;

import org.apache.commons.lang.StringUtils;
import org.vaadin.customfield.PropertyConverter;

import com.vaadin.data.Property;
import com.vaadin.data.Validator;
import com.vaadin.ui.TextField;

public class IntegerField extends TextField {
    class IntegerConverter extends PropertyConverter<Integer, String> {

        protected IntegerConverter(Class<? extends Integer> propertyClass) {
            super(propertyClass);
        }

        public IntegerConverter(Property propertyDataSource) {
            super(propertyDataSource);
        }

        @Override
        public String format(Integer propertyValue) {
            return propertyValue == null ? "0" : propertyValue.toString();
        }

        @Override
        public Integer parse(String fieldValue) throws ConversionException {
            return Integer.parseInt(fieldValue);
        }

    }

    public IntegerField() {
        addValidator(new Validator() {

            @Override
            public void validate(Object value) throws InvalidValueException {
                try {
                    Integer.parseInt((String) value);
                } catch (NumberFormatException nfe) {
                    throw new InvalidValueException("O valor deve ser um número.");
                }

            }

            @Override
            public boolean isValid(Object value) {
                try {
                    validate(value);
                    return true;
                } catch (InvalidValueException ive) {
                    return false;
                }
            }

        });
        setNullRepresentation(StringUtils.EMPTY);
    }

    @Override
    public void setPropertyDataSource(Property newDataSource) {
        super.setPropertyDataSource(new IntegerConverter(newDataSource));
    }

}