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

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

    public class ElementExtendsValidator

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

Validates the element extends property. If the value can refer to an actual element, it will be resolved after validation.

### Rule

The rule is that the element extends value should refer to an actual element in the same report or included libraries.

### Applicability

This validator is only applied to the element extends property.

Field Summary
`protected static ElementExtendsValidator` | `instance` The singleton instance of the validator.
`static java.lang.String` | `NAME` Name of this validator.

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

Constructor Summary
`ElementExtendsValidator()`

Method Summary
`static ElementExtendsValidator` | `getInstance()` Returns the singleton validator instance.
`java.util.List` | `validate(org.eclipse.birt.report.model.core.Module module, org.eclipse.birt.report.model.core.DesignElement element)` Validates the element reference value can refer to an actual element.

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`

Field Detail

### NAME

    public static final java.lang.String NAME

  Name of this validator.

  See Also:
    Constant Field Values

### instance

    protected static final ElementExtendsValidator instance

  The singleton instance of the validator.

Constructor Detail

### ElementExtendsValidator

    public ElementExtendsValidator()

Method Detail

### getInstance

    public static ElementExtendsValidator getInstance()

  Returns the singleton validator instance.

  Returns:
    the validator instance

### validate

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

  Validates the element reference value can refer to an actual element.

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

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Copyright © 2008 Actuate Corp. All rights reserved.