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## org.eclipse.birt.report.model.api.validators
Class DataSetRequiredValidator

    java.lang.Object
      org.eclipse.birt.report.model.validators.AbstractSemanticValidator
          org.eclipse.birt.report.model.validators.AbstractElementValidator
              org.eclipse.birt.report.model.api.validators.DataSetRequiredValidator

    public class DataSetRequiredValidator

extends org.eclipse.birt.report.model.validators.AbstractElementValidator

Validates the data set of some special elements should be provided.

### Rule

The rule is that the `ListingElement.DATA_SET_PROP` should be set on the element itself or its container which is also a listing element; the `ICubeModel.DATA_SET_PROP` should be set in the cube element; the `IReportItemModel.DATA_SET_PROP` should be set in the extended items.

### Applicability

This validator is applied to `ListingElement`, `Cube` and `ExtendedItem`.

Field Summary

Fields inherited from class org.eclipse.birt.report.model.validators.AbstractSemanticValidator
`modules, name`

Constructor Summary
`DataSetRequiredValidator()`

Method Summary
`static DataSetRequiredValidator` | `getInstance()` Returns the singleton validator instance.
`java.util.List<SemanticException>` | `validate(org.eclipse.birt.report.model.core.Module module, org.eclipse.birt.report.model.core.DesignElement element)` Validates whether the data set of the given listing element is provided.

Methods inherited from class org.eclipse.birt.report.model.validators.AbstractSemanticValidator
`canApplyToDesign, canApplyToLibrary, getName, isInTemplateParameterDefinitionSlot, setModules, setName`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### DataSetRequiredValidator

    public DataSetRequiredValidator()

Method Detail

### getInstance

    public static DataSetRequiredValidator getInstance()

  Returns the singleton validator instance.

  Returns:
    the validator instance

### validate

    public java.util.List<SemanticException> validate(org.eclipse.birt.report.model.core.Module module,
                                                      org.eclipse.birt.report.model.core.DesignElement element)

  Validates whether the data set of the given listing element is provided.

  Specified by:
    `validate` in class `org.eclipse.birt.report.model.validators.AbstractElementValidator`
  Parameters:
    `module` - the module
    `element` - the listing element to validate
  Returns:
    error list, each of which is the instance of `SemanticException`.

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