view flys-client/src/main/java/de/intevation/flys/client/client/utils/DoubleValidator.java @ 1507:c21d14e48040

Improved validation and property handling. flys-client/trunk@3645 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Raimund Renkert <raimund.renkert@intevation.de>
date Wed, 11 Jan 2012 10:21:22 +0000
parents 339f8aa641b5
children 4f4d29404dba
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package de.intevation.flys.client.client.utils;

import java.util.Map;

import com.google.gwt.core.client.GWT;
import com.google.gwt.i18n.client.NumberFormat;

import com.smartgwt.client.widgets.form.fields.FormItem;

import de.intevation.flys.client.client.FLYSConstants;

/**
 * @author <a href="mailto:raimund.renkert@intevation.de">Raimund Renkert</a>
 */
public class DoubleValidator implements Validator {

    /** The interface that provides i18n messages. */
    protected FLYSConstants MSG = GWT.create(FLYSConstants.class);

    /**
     *
     */
    public boolean validate(FormItem item, Map errors) {
        boolean valid = true;

        String v = item.getValue().toString();

        NumberFormat f = NumberFormat.getDecimalFormat();

        try {
            if (v == null) {
                throw new NumberFormatException("empty");
            }

            double value = f.parse(v);

            errors.remove(item.getFieldName());
        }
        catch (NumberFormatException nfe) {
            errors.put(item.getFieldName(), MSG.wrongFormat());

            item.focusInItem();

            valid = false;
        }
        return valid;
    }
}

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