package pt.ist.renderers.validators;

import org.apache.commons.lang.StringUtils;

import pt.ist.renderers.utils.RenderUtils;

public class DoubleValidator extends HtmlValidator {

    public DoubleValidator() {
	super();
    }

    public DoubleValidator(HtmlChainValidator htmlChainValidator) {
	super(htmlChainValidator);
    }

    @Override
    public String getErrorMessage() {
	return RenderUtils.getResourceString("renderers.validator.number");
    }

    @Override
    public void performValidation() {
	String numberText = getComponent().getValue().trim();

	if (!StringUtils.isEmpty(numberText)) {
	    try {
		Double.parseDouble(numberText);
		setValid(true);
	    } catch (NumberFormatException e) {
		setValid(false);
	    }
	}
    }
}