raimund@1500: package de.intevation.flys.client.client.utils;
raimund@1500: import com.google.gwt.core.client.GWT;
raimund@1500: import com.smartgwt.client.widgets.form.DynamicForm;
raimund@1500: import com.smartgwt.client.widgets.form.fields.FormItem;
raimund@1500: import com.google.gwt.i18n.client.NumberFormat;
raimund@1500: import com.smartgwt.client.widgets.form.fields.events.ChangedHandler;
raimund@1500: import com.smartgwt.client.widgets.form.fields.events.ChangedEvent;
raimund@1500: import java.util.Map;
raimund@1500: import de.intevation.flys.client.client.FLYSConstants;
raimund@1500: 
raimund@1500: /**
raimund@1500:  * @author <a href="mailto:raimund.renkert@intevation.de">Raimund Renkert</a>
raimund@1500:  *
raimund@1500:  * This validator is used for SmartGWT FormItems.
raimund@1500:  *
raimund@1500:  * To use this validator an attribute named 'internalType' has to be set.
raimund@1500:  * Values for 'internalType':
raimund@1500:  *   'double'
raimund@1500:  *   'integer'
raimund@1500:  */
raimund@1500: public class Validator implements ChangedHandler {
raimund@1500: 
raimund@1500:     /** The interface that provides i18n messages. */
raimund@1500:     protected FLYSConstants MSG = GWT.create(FLYSConstants.class);
raimund@1500: 
raimund@1500: 
raimund@1500:     /**
raimund@1500:      *
raimund@1500:      */
raimund@1500:     public void onChanged(ChangedEvent e) {
raimund@1500:         FormItem item = e.getItem();
raimund@1500:         DynamicForm form = e.getForm();
raimund@1500:         Map errors = form.getErrors();
raimund@1500:         String type = item.getAttribute("internalType");
raimund@1500: 
raimund@1500:         if(type.equals("double")) {
raimund@1500:             validateFloat(item, errors);
raimund@1500:             form.setErrors(errors, true);
raimund@1500:         }
raimund@1500:         else if(type.equals("integer")) {
raimund@1500:             validateInteger(item, errors);
raimund@1500:             form.setErrors(errors, true);
raimund@1500:         }
raimund@1500:         else {
raimund@1500:             GWT.log("No Attribute 'internalType' set. Not using any validator.");
raimund@1500:         }
raimund@1500:     }
raimund@1500: 
raimund@1500: 
raimund@1500:     /**
raimund@1500:      *
raimund@1500:      */
raimund@1500:     protected boolean validateInteger(FormItem item, Map errors) {
raimund@1500:         boolean valid = true;
raimund@1500: 
raimund@1500:         String v = (String) item.getValue();
raimund@1500: 
raimund@1500:         NumberFormat f = NumberFormat.getDecimalFormat();
raimund@1500: 
raimund@1500:         try {
raimund@1500:             if (v == null) {
raimund@1500:                 throw new NumberFormatException("empty");
raimund@1500:             }
raimund@1500: 
raimund@1500:             int value = Integer.parseInt(v);
raimund@1500: 
raimund@1500:             errors.remove(item.getFieldName());
raimund@1500:         }
raimund@1500:         catch (NumberFormatException nfe) {
raimund@1500:             errors.put(item.getFieldName(), MSG.wrongFormat());
raimund@1500: 
raimund@1500:             item.focusInItem();
raimund@1500: 
raimund@1500:             valid = false;
raimund@1500:         }
raimund@1500:         return valid;
raimund@1500:     }
raimund@1500: 
raimund@1500: 
raimund@1500:     /**
raimund@1500:      *
raimund@1500:      */
raimund@1500:     protected boolean validateFloat(FormItem item, Map errors) {
raimund@1500:         boolean valid = true;
raimund@1500: 
raimund@1500:         String v = (String) item.getValue();
raimund@1500: 
raimund@1500:         NumberFormat f = NumberFormat.getDecimalFormat();
raimund@1500: 
raimund@1500:         try {
raimund@1500:             if (v == null) {
raimund@1500:                 throw new NumberFormatException("empty");
raimund@1500:             }
raimund@1500: 
raimund@1500:             double value = f.parse(v);
raimund@1500: 
raimund@1500:             errors.remove(item.getFieldName());
raimund@1500:         }
raimund@1500:         catch (NumberFormatException nfe) {
raimund@1500:             errors.put(item.getFieldName(), MSG.wrongFormat());
raimund@1500: 
raimund@1500:             item.focusInItem();
raimund@1500: 
raimund@1500:             valid = false;
raimund@1500:         }
raimund@1500:         return valid;
raimund@1500:     }
raimund@1500: }
raimund@1500: