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package javax.xml.parsers;
import com.sun.org.apache.xerces.internal.jaxp.SAXParserFactoryImpl;
import javax.xml.validation.Schema;
import org.xml.sax.SAXException;
import org.xml.sax.SAXNotRecognizedException;
import org.xml.sax.SAXNotSupportedException;
/**
* Defines a factory API that enables applications to configure and
* obtain a SAX based parser to parse XML documents.
*
* @author <a href="mailto:Jeff.Suttor@Sun.com">Jeff Suttor</a>
* @author <a href="mailto:Neeraj.Bajaj@sun.com">Neeraj Bajaj</a>
*
* @since 1.4
*/
public abstract class SAXParserFactory {
/**
* Should Parsers be validating?
*/
private boolean validating = false;
/**
* Should Parsers be namespace aware?
*/
private boolean namespaceAware = false;
/**
* Protected constructor to force use of {@link #newInstance()}.
*/
protected SAXParserFactory () {
}
/**
* Creates a new instance of the {@code SAXParserFactory} builtin
* system-default implementation.
*
* @return A new instance of the {@code SAXParserFactory} builtin
* system-default implementation.
*
* @since 9
*/
public static SAXParserFactory newDefaultInstance() {
return new SAXParserFactoryImpl();
}
/**
* Obtain a new instance of a {@code SAXParserFactory}. This
* static method creates a new factory instance
* This method uses the following ordered lookup procedure to determine
* the {@code SAXParserFactory} implementation class to
* load:
* <ul>
* <li>
* Use the {@code javax.xml.parsers.SAXParserFactory} system
* property.
* </li>
* <li>
* <p>
* Use the configuration file "jaxp.properties". The file is in standard
* {@link java.util.Properties} format and typically located in the
* {@code conf} directory of the Java installation. It contains the fully qualified
* name of the implementation class with the key being the system property
* defined above.
* <p>
* The jaxp.properties file is read only once by the JAXP implementation
* and its values are then cached for future use. If the file does not exist
* when the first attempt is made to read from it, no further attempts are
* made to check for its existence. It is not possible to change the value
* of any property in jaxp.properties after it has been read for the first time.
* </li>
* <li>
* <p>
* Use the service-provider loading facility, defined by the
* {@link java.util.ServiceLoader} class, to attempt to locate and load an
* implementation of the service using the {@linkplain
* java.util.ServiceLoader#load(java.lang.Class) default loading mechanism}:
* the service-provider loading facility will use the {@linkplain
* java.lang.Thread#getContextClassLoader() current thread's context class loader}
* to attempt to load the service. If the context class
* loader is null, the {@linkplain
* ClassLoader#getSystemClassLoader() system class loader} will be used.
* </li>
* <li>
* <p>
* Otherwise, the {@linkplain #newDefaultInstance() system-default}
* implementation is returned.
* </li>
* </ul>
*
* <p>
* Once an application has obtained a reference to a
* {@code SAXParserFactory} it can use the factory to
* configure and obtain parser instances.
*
*
*
* <h2>Tip for Trouble-shooting</h2>
* <p>
* Setting the {@code jaxp.debug} system property will cause
* this method to print a lot of debug messages
* to {@code System.err} about what it is doing and where it is looking at.
*
* <p>
* If you have problems loading {@link SAXParser}s, try:
* <pre>
* java -Djaxp.debug=1 YourProgram ....
* </pre>
*
*
* @return A new instance of a SAXParserFactory.
*
* @throws FactoryConfigurationError in case of {@linkplain
* java.util.ServiceConfigurationError service configuration error} or if
* the implementation is not available or cannot be instantiated.
*/
public static SAXParserFactory newInstance() {
return FactoryFinder.find(
/* The default property name according to the JAXP spec */
SAXParserFactory.class,
/* The fallback implementation class name */
"com.sun.org.apache.xerces.internal.jaxp.SAXParserFactoryImpl");
}
/**
* Obtain a new instance of a {@code SAXParserFactory} from class name.
* This function is useful when there are multiple providers in the classpath.
* It gives more control to the application as it can specify which provider
* should be loaded.
*
* <p>Once an application has obtained a reference to a {@code SAXParserFactory}
* it can use the factory to configure and obtain parser instances.
*
*
* <h2>Tip for Trouble-shooting</h2>
* <p>Setting the {@code jaxp.debug} system property will cause
* this method to print a lot of debug messages
* to {@code System.err} about what it is doing and where it is looking at.
*
* <p>
* If you have problems, try:
* <pre>
* java -Djaxp.debug=1 YourProgram ....
* </pre>
*
* @param factoryClassName fully qualified factory class name that provides implementation of {@code javax.xml.parsers.SAXParserFactory}.
*
* @param classLoader {@code ClassLoader} used to load the factory class. If {@code null}
* current {@code Thread}'s context classLoader is used to load the factory class.
*
* @return New instance of a {@code SAXParserFactory}
*
* @throws FactoryConfigurationError if {@code factoryClassName} is {@code null}, or
* the factory class cannot be loaded, instantiated.
*
* @see #newInstance()
*
* @since 1.6
*/
public static SAXParserFactory newInstance(String factoryClassName, ClassLoader classLoader){
//do not fallback if given classloader can't find the class, throw exception
return FactoryFinder.newInstance(SAXParserFactory.class,
factoryClassName, classLoader, false);
}
/**
* Creates a new instance of a SAXParser using the currently
* configured factory parameters.
*
* @return A new instance of a SAXParser.
*
* @throws ParserConfigurationException if a parser cannot
* be created which satisfies the requested configuration.
* @throws SAXException for SAX errors.
*/
public abstract SAXParser newSAXParser()
throws ParserConfigurationException, SAXException;
/**
* Specifies that the parser produced by this code will
* provide support for XML namespaces. By default the value of this is set
* to {@code false}.
*
* @param awareness true if the parser produced by this code will
* provide support for XML namespaces; false otherwise.
*/
public void setNamespaceAware(boolean awareness) {
this.namespaceAware = awareness;
}
/**
* Specifies that the parser produced by this code will
* validate documents as they are parsed. By default the value of this is
* set to {@code false}.
*
* <p>
* Note that "the validation" here means
* <a href="http://www.w3.org/TR/REC-xml#proc-types">a validating
* parser</a> as defined in the XML recommendation.
* In other words, it essentially just controls the DTD validation.
* (except the legacy two properties defined in JAXP 1.2.)
*
* <p>
* To use modern schema languages such as W3C XML Schema or
* RELAX NG instead of DTD, you can configure your parser to be
* a non-validating parser by leaving the {@link #setValidating(boolean)}
* method {@code false}, then use the {@link #setSchema(Schema)}
* method to associate a schema to a parser.
*
* @param validating true if the parser produced by this code will
* validate documents as they are parsed; false otherwise.
*/
public void setValidating(boolean validating) {
this.validating = validating;
}
/**
* Indicates whether or not the factory is configured to produce
* parsers which are namespace aware.
*
* @return true if the factory is configured to produce
* parsers which are namespace aware; false otherwise.
*/
public boolean isNamespaceAware() {
return namespaceAware;
}
/**
* Indicates whether or not the factory is configured to produce
* parsers which validate the XML content during parse.
*
* @return true if the factory is configured to produce parsers which validate
* the XML content during parse; false otherwise.
*/
public boolean isValidating() {
return validating;
}
/**
* Sets the particular feature in the underlying implementation of
* org.xml.sax.XMLReader.
* A list of the core features and properties can be found at
* <a href="http://www.saxproject.org/">http://www.saxproject.org/</a>
*
* <p>All implementations are required to support the {@link javax.xml.XMLConstants#FEATURE_SECURE_PROCESSING} feature.
* When the feature is
* <ul>
* <li>
* {@code 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
* {@link org.xml.sax.ErrorHandler#fatalError(SAXParseException exception)}.
* See {@link SAXParser} {@code parse} methods for handler specification.
* </li>
* <li>
* When the feature is {@code false}, the implementation will processing XML according to the XML specifications without
* regard to possible implementation limits.
* </li>
* </ul>
*
* @param name The name of the feature to be set.
* @param value The value of the feature to be set.
*
* @throws ParserConfigurationException if a parser cannot
* be created which satisfies the requested configuration.
* @throws SAXNotRecognizedException When the underlying XMLReader does
* not recognize the property name.
* @throws SAXNotSupportedException When the underlying XMLReader
* recognizes the property name but doesn't support the
* property.
* @throws NullPointerException If the {@code name} parameter is null.
*
* @see org.xml.sax.XMLReader#setFeature
*/
public abstract void setFeature(String name, boolean value)
throws ParserConfigurationException, SAXNotRecognizedException,
SAXNotSupportedException;
/**
*
* Returns the particular property requested for in the underlying
* implementation of org.xml.sax.XMLReader.
*
* @param name The name of the property to be retrieved.
*
* @return Value of the requested property.
*
* @throws ParserConfigurationException if a parser cannot be created which satisfies the requested configuration.
* @throws SAXNotRecognizedException When the underlying XMLReader does not recognize the property name.
* @throws SAXNotSupportedException When the underlying XMLReader recognizes the property name but doesn't support the property.
*
* @see org.xml.sax.XMLReader#getProperty
*/
public abstract boolean getFeature(String name)
throws ParserConfigurationException, SAXNotRecognizedException,
SAXNotSupportedException;
/**
* Gets the {@link Schema} object specified through
* the {@link #setSchema(Schema schema)} method.
*
*
* @throws UnsupportedOperationException When implementation does not
* override this method
*
* @return
* the {@link Schema} object that was last set through
* the {@link #setSchema(Schema)} method, or null
* if the method was not invoked since a {@link SAXParserFactory}
* is created.
*
* @since 1.5
*/
public Schema getSchema() {
throw new UnsupportedOperationException(
"This parser does not support specification \""
+ this.getClass().getPackage().getSpecificationTitle()
+ "\" version \""
+ this.getClass().getPackage().getSpecificationVersion()
+ "\""
);
}
/**
* Set the {@link Schema} to be used by parsers created
* from this factory.
*
* <p>When a {@link Schema} is non-null, a parser will use a validator
* created from it to validate documents before it passes information
* down to the application.
*
* <p>When warnings/errors/fatal errors are found by the validator, the parser must
* handle them as if those errors were found by the parser itself.
* In other words, if the user-specified {@link org.xml.sax.ErrorHandler}
* is set, it must receive those errors, and if not, they must be
* treated according to the implementation specific
* default error handling rules.
*
* <p>A validator may modify the SAX event stream (for example by
* adding default values that were missing in documents), and a parser
* is responsible to make sure that the application will receive
* those modified event stream.
*
* <p>Initially, {@code null} is set as the {@link Schema}.
*
* <p>This processing will take effect even if
* the {@link #isValidating()} method returns {@code false}.
*
* <p>It is an error to use
* the {@code http://java.sun.com/xml/jaxp/properties/schemaSource}
* property and/or the {@code http://java.sun.com/xml/jaxp/properties/schemaLanguage}
* property in conjunction with a non-null {@link Schema} object.
* Such configuration will cause a {@link SAXException}
* exception when those properties are set on a {@link SAXParser}.
*
* <h3>Note for implementors</h3>
* <p>
* A parser must be able to work with any {@link Schema}
* implementation. However, parsers and schemas are allowed
* to use implementation-specific custom mechanisms
* as long as they yield the result described in the specification.
*
* @param schema {@code Schema} to use, {@code null} to remove a schema.
*
* @throws UnsupportedOperationException When implementation does not
* override this method
*
* @since 1.5
*/
public void setSchema(Schema schema) {
throw new UnsupportedOperationException(
"This parser does not support specification \""
+ this.getClass().getPackage().getSpecificationTitle()
+ "\" version \""
+ this.getClass().getPackage().getSpecificationVersion()
+ "\""
);
}
/**
* Set state of XInclude processing.
*
* <p>If XInclude markup is found in the document instance, should it be
* processed as specified in <a href="http://www.w3.org/TR/xinclude/">
* XML Inclusions (XInclude) Version 1.0</a>.
*
* <p>XInclude processing defaults to {@code false}.
*
* @param state Set XInclude processing to {@code true} or
* {@code false}
*
* @throws UnsupportedOperationException When implementation does not
* override this method
*
* @since 1.5
*/
public void setXIncludeAware(final boolean state) {
if (state) {
throw new UnsupportedOperationException(" setXIncludeAware " +
"is not supported on this JAXP" +
" implementation or earlier: " + this.getClass());
}
}
/**
* Get state of XInclude processing.
*
* @return current state of XInclude processing
*
* @throws UnsupportedOperationException When implementation does not
* override this method
*
* @since 1.5
*/
public boolean isXIncludeAware() {
throw new UnsupportedOperationException(
"This parser does not support specification \""
+ this.getClass().getPackage().getSpecificationTitle()
+ "\" version \""
+ this.getClass().getPackage().getSpecificationVersion()
+ "\""
);
}
}