130 lines
4.5 KiB
Java
130 lines
4.5 KiB
Java
// SAX parser factory.
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// No warranty; no copyright -- use this as you will.
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// $Id: ParserFactory.java,v 1.1 2000/10/02 02:43:20 sboag Exp $
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package org.xml.sax.helpers;
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import java.lang.ClassNotFoundException;
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import java.lang.IllegalAccessException;
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import java.lang.InstantiationException;
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import java.lang.SecurityException;
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import java.lang.ClassCastException;
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import org.xml.sax.Parser;
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/**
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* Java-specific class for dynamically loading SAX parsers.
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*
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* <blockquote>
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* <em>This module, both source code and documentation, is in the
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* Public Domain, and comes with <strong>NO WARRANTY</strong>.</em>
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* </blockquote>
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*
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* <p><strong>Note:</strong> This class is designed to work with the now-deprecated
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* SAX1 {@link org.xml.sax.Parser Parser} class. SAX2 applications should use
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* {@link org.xml.sax.helpers.XMLReaderFactory XMLReaderFactory} instead.</p>
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*
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* <p>ParserFactory is not part of the platform-independent definition
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* of SAX; it is an additional convenience class designed
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* specifically for Java XML application writers. SAX applications
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* can use the static methods in this class to allocate a SAX parser
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* dynamically at run-time based either on the value of the
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* `org.xml.sax.parser' system property or on a string containing the class
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* name.</p>
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*
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* <p>Note that the application still requires an XML parser that
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* implements SAX1.</p>
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*
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* @deprecated This class works with the deprecated
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* {@link org.xml.sax.Parser Parser}
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* interface.
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* @since SAX 1.0
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* @author David Megginson,
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* <a href="mailto:sax@megginson.com">sax@megginson.com</a>
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* @version 2.0
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* @see org.xml.sax.Parser
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* @see java.lang.Class
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*/
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public class ParserFactory {
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/**
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* Private null constructor.
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*/
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private ParserFactory ()
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{
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}
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/**
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* Create a new SAX parser using the `org.xml.sax.parser' system property.
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*
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* <p>The named class must exist and must implement the
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* {@link org.xml.sax.Parser Parser} interface.</p>
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*
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* @exception java.lang.NullPointerException There is no value
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* for the `org.xml.sax.parser' system property.
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* @exception java.lang.ClassNotFoundException The SAX parser
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* class was not found (check your CLASSPATH).
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* @exception IllegalAccessException The SAX parser class was
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* found, but you do not have permission to load
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* it.
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* @exception InstantiationException The SAX parser class was
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* found but could not be instantiated.
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* @exception java.lang.ClassCastException The SAX parser class
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* was found and instantiated, but does not implement
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* org.xml.sax.Parser.
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* @see #makeParser(java.lang.String)
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* @see org.xml.sax.Parser
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*/
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public static Parser makeParser ()
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throws ClassNotFoundException,
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IllegalAccessException,
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InstantiationException,
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NullPointerException,
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ClassCastException
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{
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String className = System.getProperty("org.xml.sax.parser");
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if (className == null) {
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throw new NullPointerException("No value for sax.parser property");
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} else {
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return makeParser(className);
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}
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}
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/**
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* Create a new SAX parser object using the class name provided.
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*
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* <p>The named class must exist and must implement the
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* {@link org.xml.sax.Parser Parser} interface.</p>
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*
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* @param className A string containing the name of the
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* SAX parser class.
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* @exception java.lang.ClassNotFoundException The SAX parser
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* class was not found (check your CLASSPATH).
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* @exception IllegalAccessException The SAX parser class was
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* found, but you do not have permission to load
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* it.
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* @exception InstantiationException The SAX parser class was
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* found but could not be instantiated.
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* @exception java.lang.ClassCastException The SAX parser class
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* was found and instantiated, but does not implement
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* org.xml.sax.Parser.
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* @see #makeParser()
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* @see org.xml.sax.Parser
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*/
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public static Parser makeParser (String className)
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throws ClassNotFoundException,
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IllegalAccessException,
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InstantiationException,
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ClassCastException
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{
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return (Parser)(Class.forName(className).newInstance());
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}
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}
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// end of ParserFactory.java
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