package org.relaxng.datatype;

/**
 * A Datatype library
 * 
 * @author <a href="mailto:jjc@jclark.com">James Clark</a>
 * @author <a href="mailto:kohsuke.kawaguchi@sun.com">Kohsuke KAWAGUCHI</a>
 */
public interface DatatypeLibrary {
	
	/**
	 * Creates a new instance of DatatypeBuilder.
	 * 
	 * The callee should throw a DatatypeException in case of an error.
	 * 
	 * @param baseTypeLocalName
	 *		The local name of the base type.
	 * 
	 * @return
	 *		A non-null valid datatype object.
	 */
	DatatypeBuilder createDatatypeBuilder( String baseTypeLocalName )
		throws DatatypeException;
	
	/**
	 * Gets or creates a pre-defined type.
	 * 
	 * This is just a short-cut of
	 * <code>createDatatypeBuilder(typeLocalName).createDatatype();</code>
	 * 
	 * The callee should throw a DatatypeException in case of an error.
	 * 
	 * @return
	 *		A non-null valid datatype object.
	 */
	Datatype createDatatype( String typeLocalName ) throws DatatypeException;
}