PercentageValidator.java

package fr.openwide.core.wicket.more.markup.html.basic;

import java.math.BigDecimal;

import org.apache.wicket.validation.IValidatable;
import org.apache.wicket.validation.ValidationError;
import org.apache.wicket.validation.validator.RangeValidator;

public class PercentageValidator extends RangeValidator<BigDecimal> {
	private static final long serialVersionUID = 715451828147101142L;

	private static final PercentageValidator DEFAULT_PERCENTAGE_AS_RATIO_VALIDATOR = new PercentageValidator(
			new BigDecimal("0"), new BigDecimal("1"), true);

	private static final PercentageValidator DEFAULT_PERCENTAGE_VALIDATOR = new PercentageValidator(
			new BigDecimal("0"), new BigDecimal("100"), true);

	private boolean decimal;

	public PercentageValidator(BigDecimal minimumValue, BigDecimal maximumValue, boolean decimal) {
		super(minimumValue, maximumValue);
		this.decimal = decimal;
	}

	@Override
	public void validate(IValidatable<BigDecimal> validatable) {
		BigDecimal percentage = validatable.getValue();
		
		if (percentage != null) {
			final BigDecimal min = getMinimum();
			final BigDecimal max = getMaximum();
			if (!decimal && percentage.scale() != 0) {
				ValidationError error = new ValidationError();
				error.addKey("common.validator.percentage.decimal.error");
				validatable.error(error);
			}
			if (percentage.compareTo(min) < 0 || percentage.compareTo(max) > 0) {
				ValidationError error = new ValidationError();
				error.getVariables().put("min", min);
				error.getVariables().put("max", max);
				error.addKey("common.validator.percentage.range.error");
				validatable.error(error);
			}
		}
	}

	public static PercentageValidator getDefaultPercentageAsRatioValidator() {
		return DEFAULT_PERCENTAGE_AS_RATIO_VALIDATOR;
	}

	public static PercentageValidator getDefaultPercentageValidator() {
		return DEFAULT_PERCENTAGE_VALIDATOR;
	}

}