Package com.smartgwt.client.widgets.form.validator

# Class RequiredIfValidator

java.lang.Object
com.smartgwt.client.core.JsObject
com.smartgwt.client.core.DataClass
com.smartgwt.client.widgets.form.validator.Validator
com.smartgwt.client.widgets.form.validator.RequiredIfValidator

All Implemented Interfaces:
  `HasHandlers`

public class RequiredIfValidator extends Validator
RequiredIf type validators should be specified with a ``RequiredIfFunction``, which has to be passed to ``setExpression()``, and takes two parameters:

- item - the DynamicForm item on which the error occurred (may be null)
- value - the value of the field in question

When validation is perfomed, the expression will be evaluated - if it returns `true`, the field will be treated as a required field, so validation will fail if the field has no value.

- ## Field Summary

  ### Fields inherited from class com.smartgwt.client.core.DataClass

  `factoryCreated, factoryProperties`

  ### Fields inherited from class com.smartgwt.client.core.JsObject

  `jsObj`

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `RequiredIfValidator()`
  `RequiredIfValidator(RequiredIfFunction expression)`

- ## Method Summary

  Modifier and Type
  Method
  Description
  `void`
  `setExpression(RequiredIfFunction expression)`
  Set the expression.

  ### Methods inherited from class com.smartgwt.client.widgets.form.validator.Validator

  `addValidatorDefinition, create, getApplyWhen, getCheckComponentData, getClientOnly, getCondition, getDependentFields, getOrCreateRef, getStopIfFalse, getStopOnError, getType, getTypeAsString, getValidateOnChange, setApplyWhen, setCheckComponentData, setClientOnly, setCondition, setDependentFields, setErrorMessage, setStopIfFalse, setStopOnError, setType, setType, setValidateOnChange`

  ### Methods inherited from class com.smartgwt.client.core.DataClass

  `applyFactoryProperties, doAddHandler, fireEvent, getAttribute, getAttributeAsBoolean, getAttributeAsBoolean, getAttributeAsDate, getAttributeAsDouble, getAttributeAsDoubleArray, getAttributeAsElement, getAttributeAsFloat, getAttributeAsInt, getAttributeAsIntArray, getAttributeAsJavaScriptObject, getAttributeAsLong, getAttributeAsMap, getAttributeAsObject, getAttributeAsRecord, getAttributeAsString, getAttributeAsStringArray, getAttributes, getHandlerCount, isFactoryCreated, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttributeAsJavaObject, setFactoryCreated`

  ### Methods inherited from class com.smartgwt.client.core.JsObject

  `equals, getJsObj, hashCode, isCreated, setJavaScriptObject, setJsObj`

  ### Methods inherited from class java.lang.Object

  `clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait`

- ## Constructor Details

  - ### RequiredIfValidator

    public RequiredIfValidator()

  - ### RequiredIfValidator

    public RequiredIfValidator(RequiredIfFunction expression)

- ## Method Details

  - ### setExpression

    public void setExpression(RequiredIfFunction expression)
    Set the expression.
    Parameters:
      `expression` - the expression