public abstract class TypeInfoProvider extends Object
ValidatorHandler.
 Some schema languages, such as W3C XML Schema, encourages a validator to report the "type" it assigns to each attribute/element. Those applications who wish to access this type information can invoke methods defined on this "interface" to access such type information.
 Implementation of this "interface" can be obtained through the
 ValidatorHandler.getTypeInfoProvider() method.
TypeInfo| Modifier | Constructor and Description | 
|---|---|
| protected  | TypeInfoProvider()Constructor for the derived class. | 
| Modifier and Type | Method and Description | 
|---|---|
| abstract TypeInfo | getAttributeTypeInfo(int index)Returns the immutable  TypeInfoobject for the specified
 attribute of the current element. | 
| abstract TypeInfo | getElementTypeInfo()Returns the immutable  TypeInfoobject for the current
 element. | 
| abstract boolean | isIdAttribute(int index)Returns  trueif the specified attribute is determined
 to be ID. | 
| abstract boolean | isSpecified(int index)Returns  falseif the attribute was added by the validator. | 
protected TypeInfoProvider()
The constructor does nothing.
public abstract TypeInfo getElementTypeInfo()
Returns the immutable TypeInfo object for the current
 element.
The method may only be called by the startElement event
 or the endElement event
 of the ContentHandler that the application sets to
 the ValidatorHandler.
When W3C XML Schema validation is being performed, in the
 case where an element has a union type, the TypeInfo
 returned by a call to getElementTypeInfo() from the
 startElement
 event will be the union type. The TypeInfo
 returned by a call
 from the endElement event will be the actual member type used
 to validate the element.
TypeInfo object that represents the
      type of the current element.
      Note that the caller can keep references to the obtained
      TypeInfo longer than the callback scope.
      Otherwise, this method returns
      null if the validator is unable to
      determine the type of the current element for some reason
      (for example, if the validator is recovering from
      an earlier error.)IllegalStateException - If this method is called from other ContentHandler
      methods.public abstract TypeInfo getAttributeTypeInfo(int index)
TypeInfo object for the specified
 attribute of the current element.
 
 The method may only be called by the startElement event of
 the ContentHandler that the application sets to the
 ValidatorHandler.
index - The index of the attribute. The same index for
      the Attributes object passed to the
      startElement callback.TypeInfo object that represents the
      type of the specified attribute.
      Note that the caller can keep references to the obtained
      TypeInfo longer than the callback scope.
      Otherwise, this method returns
      null if the validator is unable to
      determine the type.IndexOutOfBoundsException - If the index is invalid.IllegalStateException - If this method is called from other ContentHandler
      methods.public abstract boolean isIdAttribute(int index)
true if the specified attribute is determined
 to be ID.
 Exacly how an attribute is "determined to be ID" is up to the schema language. In case of W3C XML Schema, this means that the actual type of the attribute is the built-in ID type or its derived type.
 A DocumentBuilder uses this information
 to properly implement Attr.isId().
 
 The method may only be called by the startElement event of
 the ContentHandler that the application sets to the
 ValidatorHandler.
index - The index of the attribute. The same index for
      the Attributes object passed to the
      startElement callback.IndexOutOfBoundsException - If the index is invalid.IllegalStateException - If this method is called from other ContentHandler
      methods.public abstract boolean isSpecified(int index)
false if the attribute was added by the validator.
 
 This method provides information necessary for
 a DocumentBuilder to determine what
 the DOM tree should return from the Attr.getSpecified() method.
 
 The method may only be called by the startElement event of
 the ContentHandler that the application sets to the
 ValidatorHandler.
 
A general guideline for validators is to return true if the attribute was originally present in the pipeline, and false if it was added by the validator.
index - The index of the attribute. The same index for
      the Attributes object passed to the
      startElement callback.true if the attribute was present before the validator
      processes input. false if the attribute was added
      by the validator.IndexOutOfBoundsException - If the index is invalid.IllegalStateException - If this method is called from other ContentHandler
      methods. Submit a bug or feature 
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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