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/*
 * @(#)SAXParserFactory.java	1.7 03/05/12 
 *
 * Copyright 2002-2003 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

package javax.xml.parsers;

import org.xml.sax.SAXException;
import org.xml.sax.SAXNotSupportedException;
import org.xml.sax.SAXNotRecognizedException;

/**
 * Defines a factory API that enables applications to configure and
 * obtain a SAX based parser to parse XML documents.
 * An implementation of the SAXParserFactory class is
 * NOT guaranteed to be thread safe. It is up to the user application 
 * to make sure about the use of the SAXParserFactory from 
 * more than one thread. Alternatively the application can have one instance 
 * of the SAXParserFactory per thread.
 * An application can use the same instance of the factory to obtain one or 
 * more instances of the SAXParser provided the instance
 * of the factory isn't being used in more than one thread at a time.
 * 

 *
 * The static newInstance method returns a new concrete 
 * implementation of this class.
 *
 * @since JAXP 1.0
 * @version 1.0
 */

public abstract class SAXParserFactory {

    private boolean namespaceAware = false;

    private boolean validating = false;

    protected SAXParserFactory() {
    }

    /**
     * Obtain a new instance of a SAXParserFactory. This
     * static method creates a new factory instance
     * This method uses the following ordered lookup procedure to determine
     * the SAXParserFactory implementation class to
     * load:
     * 

     * 
     * Use the javax.xml.parsers.SAXParserFactory system
     * property.
     * 
     * 
     * Use the properties file "lib/jaxp.properties" in the JRE directory.
     * This configuration file is in standard java.util.Properties
     *  format and contains the fully qualified name of the
     * implementation class with the key being the system property defined
     * above.
     * 
     * 
     * Use the Services API (as detailed in the JAR specification), if
     * available, to determine the classname. The Services API will look
     * for a classname in the file
     * META-INF/services/javax.xml.parsers.SAXParserFactory
     * in jars available to the runtime.
     * 
     * 
     * Platform default SAXParserFactory instance.
     * 
     * 
     *
     * Once an application has obtained a reference to a
     * SAXParserFactory it can use the factory to
     * configure and obtain parser instances.
     *
     * @return A new instance of a SAXParserFactory.
     *
     * @exception FactoryConfigurationError if the implementation is
     * not available or cannot be instantiated.
     */

    public static SAXParserFactory newInstance()
        throws FactoryConfigurationError
    {
          return new com.sun.ukit.jaxp.ParserFactory();
    }
    
    /**
     * Creates a new instance of a SAXParser using the currently
     * configured factory parameters.
     *
     * @return A new instance of a SAXParser.
     *
     * @exception ParserConfigurationException if a parser cannot
     * be created which satisfies the requested configuration.
     */
    
    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 false.
     *
     * @param awareness true if the parser produced by this code will
     *                  provide support for XML namespaces; false otherwise.
     */
    
    public void setNamespaceAware(boolean awareness)
    {
        namespaceAware = awareness;
    }

    /**
     * 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;
    }

    /**
     * Specifies that the parser produced by this code will validate
     * documents as they are parsed. By default the value of this is
     * set to false.
     *
     * @param validating true if the parser produced by this code will
     *                   validate documents as they are parsed; false
     *                   otherwise.
     */
    public void setValidating(boolean validating)
    { 
        // NOTE: the RI's factory does not currently support a validating parser
        validating = false;
    }

    /**
     * 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.
     */
    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
     *  http://www.saxproject.org/?selected=get-set 
     *
     * @param name The name of the feature to be set.
     * @param value The value of the feature to be set.
     * @exception SAXNotRecognizedException When the underlying XMLReader does
     *            not recognize the property name.
     *
     * @exception SAXNotSupportedException When the underlying XMLReader
     *            recognizes the property name but doesn't support the
     *            property.
     *
     * @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.
     *
     * @exception SAXNotRecognizedException When the underlying XMLReader does
     *            not recognize the property name.
     *
     * @exception 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;

}