User tasks with custom forms: custom user inputs validation

udoderk — Sun, 09 Sep 2012 08:44:31 GMT

Hi all,In the following articles/post is described, how to create the rendering using custom forms within activiti explorer environment:http://www.activiti.org/userguide/index.html#formshttp://forums.activiti.org/en/viewtopic.php?f=6&t=2366&p=10188&hilit=rendering#p10188http://forums.ac

Re: User tasks with custom forms: custom user inputs validation

udoderk — Sun, 09 Sep 2012 18:44:43 GMT

I've found the solution, as I have seen the sources of A.E.:
it is possible to register the validator on the vaadin-field in the renderer-class in Vaadin style :
textField.addValidator(new LongValidator("Value must be a long"));

package org.activiti.explorer.ui.form;
….
public class LongFormPropertyRenderer extends AbstractFormPropertyRenderer {

  public LongFormPropertyRenderer() {
    super(LongFormType.class);
  }

  @Override
  public Field getPropertyField(FormProperty formProperty) {
    final TextField textField = new TextField(getPropertyLabel(formProperty));
    textField.setRequired(formProperty.isRequired());
    textField.setEnabled(formProperty.isWritable());
    textField.setRequiredError(getMessage(Messages.FORM_FIELD_REQUIRED, getPropertyLabel(formProperty)));
    
    if (formProperty.getValue() != null) {
      textField.setValue(formProperty.getValue());
    }

    // Add validation of numeric value
    textField.addValidator(new LongValidator("Value must be a long"));
    textField.setImmediate(true);

    return textField;
  }
….

The validator:

package org.activiti.explorer.ui.validator;

import com.vaadin.data.validator.AbstractStringValidator;


/**
 * @author Frederik Heremans
 */
public class LongValidator extends AbstractStringValidator {

  private static final long serialVersionUID = 8306001395582004472L;

  public LongValidator(String errorMessage) {
    super(errorMessage);
  }

  @Override
  protected boolean isValidString(String value) {
    try {
        Long.parseLong(value);
        return true;
    } catch (Exception e) {
        return false;
    }
  }
}

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User tasks with custom forms: custom user inputs validation

Re: User tasks with custom forms: custom user inputs validation