Added in API level 8

Validator

abstract class Validator
kotlin.Any
   ↳ javax.xml.validation.Validator

A processor that checks an XML document against Schema.

A validator is a thread-unsafe and non-reentrant object. In other words, it is the application's responsibility to make sure that one Validator object is not used from more than one thread at any given time, and while the validate method is invoked, applications may not recursively call the validate method.

Note that while the validate(javax.xml.transform.Source) and validate(javax.xml.transform.Source,javax.xml.transform.Result) methods take a Source instance, the Source instance must be a SAXSource, DOMSource, StAXSource or StreamSource.

Summary

Protected constructors

Constructor for derived classes.

Public methods
abstract ErrorHandler!

Gets the current ErrorHandler set to this Validator.

open Boolean

Look up the value of a feature flag.

open Any!

Look up the value of a property.

abstract LSResourceResolver!

Gets the current LSResourceResolver set to this Validator.

abstract Unit

Reset this Validator to its original configuration.

abstract Unit
setErrorHandler(errorHandler: ErrorHandler!)

Sets the ErrorHandler to receive errors encountered during the validate method invocation.

open Unit
setFeature(name: String!, value: Boolean)

Set the value of a feature flag.

open Unit
setProperty(name: String!, object: Any!)

Set the value of a property.

abstract Unit

Sets the LSResourceResolver to customize resource resolution while in a validation episode.

open Unit
validate(source: Source!)

Validates the specified input.

abstract Unit
validate(source: Source!, result: Result!)

Validates the specified input and send the augmented validation result to the specified output.

Protected constructors

Validator

Added in API level 8
protected Validator()

Constructor for derived classes.

The constructor does nothing.

Derived classes must create Validator objects that have null ErrorHandler and null LSResourceResolver.

Public methods

getErrorHandler

Added in API level 8
abstract fun getErrorHandler(): ErrorHandler!

Gets the current ErrorHandler set to this Validator.

Return
ErrorHandler! This method returns the object that was last set through the setErrorHandler(org.xml.sax.ErrorHandler) method, or null if that method has never been called since this Validator has created.

getFeature

Added in API level 8
open fun getFeature(name: String!): Boolean

Look up the value of a feature flag.

The feature name is any fully-qualified URI. It is possible for a Validator to recognize a feature name but temporarily be unable to return its value. Some feature values may be available only in specific contexts, such as before, during, or after a validation.

Implementors are free (and encouraged) to invent their own features, using names built on their own URIs.

Parameters
name String!: The feature name, which is a non-null fully-qualified URI.
Return
Boolean The current value of the feature (true or false).
Exceptions
java.lang.NullPointerException When the name parameter is null.
org.xml.sax.SAXNotRecognizedException If the feature value can't be assigned or retrieved.
org.xml.sax.SAXNotSupportedException When the Validator recognizes the feature name but cannot determine its value at this time.

getProperty

Added in API level 8
open fun getProperty(name: String!): Any!

Look up the value of a property.

The property name is any fully-qualified URI. It is possible for a Validator to recognize a property name but temporarily be unable to return its value. Some property values may be available only in specific contexts, such as before, during, or after a validation.

Validators are not required to recognize any specific property names.

Implementors are free (and encouraged) to invent their own properties, using names built on their own URIs.

Parameters
name String!: The property name, which is a non-null fully-qualified URI.
Return
Any! The current value of the property.
Exceptions
java.lang.NullPointerException When the name parameter is null.
org.xml.sax.SAXNotRecognizedException If the property value can't be assigned or retrieved.
org.xml.sax.SAXNotSupportedException When the XMLReader recognizes the property name but cannot determine its value at this time.

getResourceResolver

Added in API level 8
abstract fun getResourceResolver(): LSResourceResolver!

Gets the current LSResourceResolver set to this Validator.

Return
LSResourceResolver! This method returns the object that was last set through the setResourceResolver(org.w3c.dom.ls.LSResourceResolver) method, or null if that method has never been called since this Validator has created.

reset

Added in API level 8
abstract fun reset(): Unit

Reset this Validator to its original configuration.

Validator is reset to the same state as when it was created with Schema#newValidator(). reset() is designed to allow the reuse of existing Validators thus saving resources associated with the creation of new Validators.

The reset Validator is not guaranteed to have the same LSResourceResolver or ErrorHandler Objects, e.g. Object#equals(Object obj). It is guaranteed to have a functionally equal LSResourceResolver and ErrorHandler.

setErrorHandler

Added in API level 8
abstract fun setErrorHandler(errorHandler: ErrorHandler!): Unit

Sets the ErrorHandler to receive errors encountered during the validate method invocation.

Error handler can be used to customize the error handling process during a validation. When an ErrorHandler is set, errors found during the validation will be first sent to the ErrorHandler.

The error handler can abort further validation immediately by throwing SAXException from the handler. Or for example it can print an error to the screen and try to continue the validation by returning normally from the ErrorHandler

If any Throwable is thrown from an ErrorHandler, the caller of the validate method will be thrown the same Throwable object.

Validator is not allowed to throw SAXException without first reporting it to ErrorHandler.

When the ErrorHandler is null, the implementation will behave as if the following ErrorHandler is set:

class DraconianErrorHandler implements <code><a docref="org.xml.sax.ErrorHandler">ErrorHandler</a></code>{
      public void fatalError( <code><a docref="org.xml.sax.SAXParseException">org.xml.sax.SAXParseException</a></code>e ) throws <code><a docref="org.xml.sax.SAXException">SAXException</a></code>{
          throw e;
      }
      public void error( <code><a docref="org.xml.sax.SAXParseException">org.xml.sax.SAXParseException</a></code>e ) throws <code><a docref="org.xml.sax.SAXException">SAXException</a></code>{
          throw e;
      }
      public void warning( <code><a docref="org.xml.sax.SAXParseException">org.xml.sax.SAXParseException</a></code>e ) throws <code><a docref="org.xml.sax.SAXException">SAXException</a></code>{
          // noop
      }
  }
  

When a new Validator object is created, initially this field is set to null.

Parameters
errorHandler ErrorHandler!: A new error handler to be set. This parameter can be null.

setFeature

Added in API level 8
open fun setFeature(
    name: String!,
    value: Boolean
): Unit

Set the value of a feature flag.

Feature can be used to control the way a Validator parses schemas, although Validators are not required to recognize any specific property names.

The feature name is any fully-qualified URI. It is possible for a Validator to expose a feature value but to be unable to change the current value. Some feature values may be immutable or mutable only in specific contexts, such as before, during, or after a validation.

Parameters
name String!: The feature name, which is a non-null fully-qualified URI.
value Boolean: The requested value of the feature (true or false).
Exceptions
java.lang.NullPointerException When the name parameter is null.
org.xml.sax.SAXNotRecognizedException If the feature value can't be assigned or retrieved.
org.xml.sax.SAXNotSupportedException When the Validator recognizes the feature name but cannot set the requested value.

setProperty

Added in API level 8
open fun setProperty(
    name: String!,
    object: Any!
): Unit

Set the value of a property.

The property name is any fully-qualified URI. It is possible for a Validator to recognize a property name but to be unable to change the current value. Some property values may be immutable or mutable only in specific contexts, such as before, during, or after a validation.

Validators are not required to recognize setting any specific property names.

Parameters
name String!: The property name, which is a non-null fully-qualified URI.
object Any!: The requested value for the property.
Exceptions
java.lang.NullPointerException When the name parameter is null.
org.xml.sax.SAXNotRecognizedException If the property value can't be assigned or retrieved.
org.xml.sax.SAXNotSupportedException When the Validator recognizes the property name but cannot set the requested value.

setResourceResolver

Added in API level 8
abstract fun setResourceResolver(resourceResolver: LSResourceResolver!): Unit

Sets the LSResourceResolver to customize resource resolution while in a validation episode.

Validator uses a LSResourceResolver when it needs to locate external resources while a validation, although exactly what constitutes "locating external resources" is up to each schema language.

When the LSResourceResolver is null, the implementation will behave as if the following LSResourceResolver is set:

class DumbLSResourceResolver implements <code><a docref="org.w3c.dom.ls.LSResourceResolver">LSResourceResolver</a></code>{
      public <code><a docref="org.w3c.dom.ls.LSInput">org.w3c.dom.ls.LSInput</a></code>resolveResource(
          String publicId, String systemId, String baseURI) {
 
          return null; // always return null
      }
  }
  

If a LSResourceResolver throws a RuntimeException (or instances of its derived classes), then the Validator will abort the parsing and the caller of the validate method will receive the same RuntimeException.

When a new Validator object is created, initially this field is set to null.

Parameters
resourceResolver LSResourceResolver!: A new resource resolver to be set. This parameter can be null.

validate

Added in API level 8
open fun validate(source: Source!): Unit

Validates the specified input.

This is just a convenience method of:

validate(source,null);
  

validate

Added in API level 8
abstract fun validate(
    source: Source!,
    result: Result!
): Unit

Validates the specified input and send the augmented validation result to the specified output.

This method places the following restrictions on the types of the Source/Result accepted.

Source/Result accepted:

javax.xml.transform.sax.SAXSource javax.xml.transform.dom.DOMSource javax.xml.transform.stream.StreamSource
null OK OK OK OK
javax.xml.transform.sax.SAXResult OK Err Err Err
javax.xml.transform.dom.DOMResult Err OK Err Err
javax.xml.transform.stream.StreamResult Err Err Err OK

To validate one Source into another kind of Result, use the identity transformer (see javax.xml.transform.TransformerFactory#newTransformer()).

Errors found during the validation is sent to the specified ErrorHandler.

If a document is valid, or if a document contains some errors but none of them were fatal and the ErrorHandler didn't throw any exception, then the method returns normally.

Parameters
source Source!: XML to be validated. Must not be null.
result Result!: The Result object that receives (possibly augmented) XML. This parameter can be null if the caller is not interested in it. Note that when a javax.xml.transform.dom.DOMResult is used, a validator might just pass the same DOM node from javax.xml.transform.dom.DOMSource to javax.xml.transform.dom.DOMResult (in which case source.getNode()==result.getNode()), it might copy the entire DOM tree, or it might alter the node given by the source.
Exceptions
java.lang.IllegalArgumentException If the Result type doesn't match the Source type, or if the specified source is not a javax.xml.transform.sax.SAXSource, javax.xml.transform.dom.DOMSource or javax.xml.transform.stream.StreamSource.
org.xml.sax.SAXException If the ErrorHandler throws a SAXException or if a fatal error is found and the ErrorHandler returns normally.
java.io.IOException If the validator is processing a javax.xml.transform.sax.SAXSource and the underlying org.xml.sax.XMLReader throws an IOException.
java.lang.NullPointerException If the source parameter is null.