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package com.sun.org.apache.xerces.internal.impl.dv;
import java.util.Hashtable;
/**
* The factory to create and return DTD types. The implementation should
* store the created datatypes in static data, so that they can be shared by
* multiple parser instance, and multiple threads.
*
* @xerces.internal
*
* @author Sandy Gao, IBM
*
* @version $Id: DTDDVFactory.java,v 1.6 2010-11-01 04:39:43 joehw Exp $
*/
public abstract class DTDDVFactory {
private static final String DEFAULT_FACTORY_CLASS = "com.sun.org.apache.xerces.internal.impl.dv.dtd.DTDDVFactoryImpl";
/**
* Get an instance of the default DTDDVFactory implementation.
*
* @return an instance of DTDDVFactory implementation
* @exception DVFactoryException cannot create an instance of the specified
* class name or the default class name
*/
public static synchronized final DTDDVFactory getInstance() throws DVFactoryException {
return getInstance(DEFAULT_FACTORY_CLASS);
}
/**
* Get an instance of DTDDVFactory implementation.
*
* @param factoryClass name of the implementation to load.
* @return an instance of DTDDVFactory implementation
* @exception DVFactoryException cannot create an instance of the specified
* class name or the default class name
*/
public static synchronized final DTDDVFactory getInstance(String factoryClass) throws DVFactoryException {
try {
// if the class name is not specified, use the default one
return (DTDDVFactory)
(ObjectFactory.newInstance(factoryClass, ObjectFactory.findClassLoader(), true));
} catch (ClassCastException e) {
throw new DVFactoryException("DTD factory class " + factoryClass + " does not extend from DTDDVFactory.");
}
}
// can't create a new object of this class
protected DTDDVFactory(){}
/**
* return a dtd type of the given name
*
* @param name the name of the datatype
* @return the datatype validator of the given name
*/
public abstract DatatypeValidator getBuiltInDV(String name);
/**
* get all built-in DVs, which are stored in a hashtable keyed by the name
*
* @return a hashtable which contains all datatypes
*/
public abstract Hashtable getBuiltInTypes();
}