protected SchemaFactory() 
{

}

Constructor for derived classes.

The constructor does nothing.

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

 abstract public ErrorHandler getErrorHandler()
Gets the current ErrorHandler  set to this SchemaFactory .

 public boolean getFeature(String name) throws SAXNotRecognizedException, SAXNotSupportedException 
{
    	
        if (name == null) {
        	throw new NullPointerException("the name parameter is null");
        } 
        throw new SAXNotRecognizedException(name);
}

Look up the value of a feature flag.

The feature name is any fully-qualified URI. It is possible for a SchemaFactory to recognize a feature name but temporarily be unable to return its value.

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

 public Object getProperty(String name) throws SAXNotRecognizedException, SAXNotSupportedException 
{
    	
        if (name == null) {
        	throw new NullPointerException("the name parameter is null");
        } 
        throw new SAXNotRecognizedException(name);
}

Look up the value of a property.

The property name is any fully-qualified URI. It is possible for a SchemaFactory to recognize a property name but temporarily be unable to return its value.

SchemaFactory s 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.

 abstract public LSResourceResolver getResourceResolver()
Gets the current LSResourceResolver  set to this SchemaFactory .

 abstract public boolean isSchemaLanguageSupported(String schemaLanguage)
Is specified schema supported by this SchemaFactory?

 public static final SchemaFactory newInstance(String schemaLanguage) 
{
        ClassLoader cl;        
        cl = SecuritySupport.getContextClassLoader();
        if (cl == null) {
            //cl = ClassLoader.getSystemClassLoader();
            //use the current class loader
            cl = SchemaFactory.class.getClassLoader();
        } 
        SchemaFactory f = new SchemaFactoryFinder(cl).newFactory(schemaLanguage);
        if (f == null) {
            throw new IllegalArgumentException(schemaLanguage);
        }
        return f;
}

Lookup an implementation of the SchemaFactory that supports the specified schema language and return it.

To find a SchemaFactory object for a given schema language, this method looks the following places in the following order where "the class loader" refers to the context class loader:

1. If the system property "javax.xml.validation.SchemaFactory:schemaLanguage" is present (where schemaLanguage is the parameter to this method), then its value is read as a class name. The method will try to create a new instance of this class by using the class loader, and returns it if it is successfully created.
2. $java.home/lib/jaxp.properties is read and the value associated with the key being the system property above is looked for. If present, the value is processed just like above.

3. The class loader is asked for service provider provider-configuration files matching javax.xml.validation.SchemaFactory in the resource directory META-INF/services. See the JAR File Specification for file format and parsing rules. Each potential service provider is required to implement the method:

          #isSchemaLanguageSupported(String schemaLanguage) 
       

   The first service provider found in class loader order that supports the specified schema language is returned.
4. Platform default SchemaFactory is located in a implementation specific way. There must be a platform default SchemaFactory for W3C XML Schema.

If everything fails, IllegalArgumentException will be thrown.

Tip for Trouble-shooting:

See java.util.Properties#load(java.io.InputStream) for exactly how a property file is parsed. In particular, colons ':' need to be escaped in a property file, so make sure schema language URIs are properly escaped in it. For example:

http\://www.w3.org/2001/XMLSchema=org.acme.foo.XSSchemaFactory

 public static SchemaFactory newInstance(String schemaLanguage,
    String factoryClassName,
    ClassLoader classLoader) 
{
        if (schemaLanguage == null) {      
            throw new NullPointerException();
        }
        if (factoryClassName == null) {
            throw new IllegalArgumentException("factoryClassName cannot be null.");
        }
        if (classLoader == null) {
            classLoader = SecuritySupport.getContextClassLoader();
        }
        SchemaFactory f = new SchemaFactoryFinder(classLoader).createInstance(factoryClassName);
        if (f == null || !f.isSchemaLanguageSupported(schemaLanguage)) {
            throw new IllegalArgumentException(schemaLanguage);
        }
        return f;
}

 abstract public Schema newSchema() throws SAXException
Creates a special Schema  object.


The exact semantics of the returned Schema  object depends
on the schema language that this SchemaFactory  is created
for.


Also, implementations are allowed to use implementation-specific
property/feature to alter the semantics of this method.


W3C XML Schema 1.0

For XML Schema, this method creates a Schema  object that
performs validation by using location hints specified in documents.


The returned Schema  object assumes that if documents
refer to the same URL in the schema location hints,
they will always resolve to the same schema document. This
assumption allows implementations to reuse parsed results of
schema documents so that multiple validations against the same
schema will run faster.


Note that the use of schema location hints introduces a
vulnerability to denial-of-service attacks. 
 

RELAX NG

RELAX NG does not support this operation.

 public Schema newSchema(Source schema) throws SAXException 
{
    	return newSchema(new Source[]{schema});
}

Parses the specified source as a schema and returns it as a schema.

This is a convenience method for #newSchema(Source[] schemas) .

 public Schema newSchema(File schema) throws SAXException 
{
        return newSchema(new StreamSource(schema));
}

Parses the specified File as a schema and returns it as a Schema.

This is a convenience method for #newSchema(Source schema) .

 public Schema newSchema(URL schema) throws SAXException 
{
        return newSchema(new StreamSource(schema.toExternalForm()));
}

Parses the specified URL as a schema and returns it as a Schema.

This is a convenience method for #newSchema(Source schema) .

 abstract public Schema newSchema(Source[] schemas) throws SAXException
Parses the specified source(s) as a schema and returns it as a schema.


The callee will read all the Source s and combine them into a
single schema. The exact semantics of the combination depends on the schema
language that this SchemaFactory  object is created for.


When an ErrorHandler  is set, the callee will report all the errors
found in sources to the handler. If the handler throws an exception, it will
abort the schema compilation and the same exception will be thrown from
this method. Also, after an error is reported to a handler, the callee is allowed
to abort the further processing by throwing it. If an error handler is not set,
the callee will throw the first error it finds in the sources.   

W3C XML Schema 1.0

The resulting schema contains components from the specified sources.
The same result would be achieved if all these sources were
imported, using appropriate values for schemaLocation and namespace,
into a single schema document with a different targetNamespace
and no components of its own, if the import elements were given
in the same order as the sources.  Section 4.2.3 of the XML Schema
recommendation describes the options processors have in this
regard.  While a processor should be consistent in its treatment of
JAXP schema sources and XML Schema imports, the behaviour between
JAXP-compliant parsers may vary; in particular, parsers may choose
to ignore all but the first <import> for a given namespace,
regardless of information provided in schemaLocation.


If the parsed set of schemas includes error(s) as
specified in the section 5.1 of the XML Schema spec, then
the error must be reported to the ErrorHandler .

RELAX NG

For RELAX NG, this method must throw UnsupportedOperationException 
if schemas.length!=1.

 abstract public  void setErrorHandler(ErrorHandler errorHandler)
Sets the ErrorHandler  to receive errors encountered
during the newSchema method invocation.


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


The error handler can abort the parsing of a schema immediately
by throwing SAXException  from the handler. Or for example
it can print an error to the screen and try to continue the
processing by returning normally from the ErrorHandler  


If any Throwable  (or instances of its derived classes)
is thrown from an ErrorHandler ,
the caller of the newSchema method will be thrown
the same Throwable  object.


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


Applications can call this method even during a Schema 
is being parsed. 


When the ErrorHandler  is null, the implementation will
behave as if the following ErrorHandler  is set:
class DraconianErrorHandler implements ErrorHandler  {
    public void fatalError( org.xml.sax.SAXParseException  e ) throws SAXException  {
        throw e;
    }
    public void error( org.xml.sax.SAXParseException  e ) throws SAXException  {
        throw e;
    }
    public void warning( org.xml.sax.SAXParseException  e ) throws SAXException  {
        // noop
    }
}



When a new SchemaFactory  object is created, initially
this field is set to null. This field will NOT be
inherited to Schema s, Validator s, or 
ValidatorHandler s that are created from this SchemaFactory .

 public  void setFeature(String name,
    boolean value) throws SAXNotRecognizedException, SAXNotSupportedException 
{
    	
        if (name == null) {
        	throw new NullPointerException("the name parameter is null");
        } 
        throw new SAXNotRecognizedException(name);
}

Set the value of a feature flag.

Feature can be used to control the way a SchemaFactory parses schemas, although SchemaFactory s are not required to recognize any specific feature names.

The feature name is any fully-qualified URI. It is possible for a SchemaFactory to expose a feature value but to be unable to change the current value.

All implementations are required to support the javax.xml.XMLConstants#FEATURE_SECURE_PROCESSING feature. When the feature is:

• true: the implementation will limit XML processing to conform to implementation limits. Examples include entity expansion limits and XML Schema constructs that would consume large amounts of resources. If XML processing is limited for security reasons, it will be reported via a call to the registered ErrorHandler#fatalError(SAXParseException exception) . See #setErrorHandler(ErrorHandler errorHandler) .
• false: the implementation will processing XML according to the XML specifications without regard to possible implementation limits.

 public  void setProperty(String name,
    Object object) throws SAXNotRecognizedException, SAXNotSupportedException 
{
    	
        if (name == null) {
        	throw new NullPointerException("the name parameter is null");
        } 
        throw new SAXNotRecognizedException(name);
}

Set the value of a property.

The property name is any fully-qualified URI. It is possible for a SchemaFactory to recognize a property name but to be unable to change the current value.

SchemaFactory s are not required to recognize setting any specific property names.

 abstract public  void setResourceResolver(LSResourceResolver resourceResolver)
Sets the LSResourceResolver  to customize
resource resolution when parsing schemas.


SchemaFactory  uses a LSResourceResolver 
when it needs to locate external resources while parsing schemas,
although exactly what constitutes "locating external resources" is
up to each schema language. For example, for W3C XML Schema,
this includes files <include>d or <import>ed,
and DTD referenced from schema files, etc.


Applications can call this method even during a Schema 
is being parsed. 


When the LSResourceResolver  is null, the implementation will
behave as if the following LSResourceResolver  is set:
class DumbDOMResourceResolver implements LSResourceResolver  {
    public org.w3c.dom.ls.LSInput  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 SchemaFactory  will abort the parsing and  
the caller of the newSchema method will receive
the same RuntimeException . 


When a new SchemaFactory  object is created, initially
this field is set to null.  This field will NOT be
inherited to Schema s, Validator s, or 
ValidatorHandler s that are created from this SchemaFactory .