/*
 * $Header: /home/cvspublic/jakarta-commons/digester/src/java/org/apache/commons/digester/Rules.java,v 1.5 2003/02/02 16:09:53 rdonkin Exp $
 * $Revision: 1.5 $
 * $Date: 2003/02/02 16:09:53 $
 *
 * ====================================================================
 *
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 1999-2003 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Commons", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
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 *    permission, please contact apache@apache.org.
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 * 5. Products derived from this software may not be called "Apache"
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 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
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 */


package org.apache.commons.digester;


import java.util.List;


/**
 * Public interface defining a collection of Rule instances (and corresponding
 * matching patterns) plus an implementation of a matching policy that selects
 * the rules that match a particular pattern of nested elements discovered
 * during parsing.
 *
 * @author Craig R. McClanahan
 * @version $Revision: 1.5 $ $Date: 2003/02/02 16:09:53 $
 */

public interface Rules {


    // ------------------------------------------------------------- Properties


    /**
     * Return the Digester instance with which this Rules instance is
     * associated.
     */
    public Digester getDigester();


    /**
     * Set the Digester instance with which this Rules instance is associated.
     *
     * @param digester The newly associated Digester instance
     */
    public void setDigester(Digester digester);


    /**
     * Return the namespace URI that will be applied to all subsequently
     * added <code>Rule</code> objects.
     */
    public String getNamespaceURI();


    /**
     * Set the namespace URI that will be applied to all subsequently
     * added <code>Rule</code> objects.
     *
     * @param namespaceURI Namespace URI that must match on all
     *  subsequently added rules, or <code>null</code> for matching
     *  regardless of the current namespace URI
     */
    public void setNamespaceURI(String namespaceURI);


    // --------------------------------------------------------- Public Methods


    /**
     * Register a new Rule instance matching the specified pattern.
     *
     * @param pattern Nesting pattern to be matched for this Rule
     * @param rule Rule instance to be registered
     */
    public void add(String pattern, Rule rule);


    /**
     * Clear all existing Rule instance registrations.
     */
    public void clear();


    /**
     * Return a List of all registered Rule instances that match the specified
     * nesting pattern, or a zero-length List if there are no matches.  If more
     * than one Rule instance matches, they <strong>must</strong> be returned
     * in the order originally registered through the <code>add()</code>
     * method.
     *
     * @param pattern Nesting pattern to be matched
     *
     * @deprecated Call match(namespaceURI,pattern) instead.
     */
    public List match(String pattern);


    /**
     * Return a List of all registered Rule instances that match the specified
     * nesting pattern, or a zero-length List if there are no matches.  If more
     * than one Rule instance matches, they <strong>must</strong> be returned
     * in the order originally registered through the <code>add()</code>
     * method.
     *
     * @param namespaceURI Namespace URI for which to select matching rules,
     *  or <code>null</code> to match regardless of namespace URI
     * @param pattern Nesting pattern to be matched
     */
    public List match(String namespaceURI, String pattern);


    /**
     * Return a List of all registered Rule instances, or a zero-length List
     * if there are no registered Rule instances.  If more than one Rule
     * instance has been registered, they <strong>must</strong> be returned
     * in the order originally registered through the <code>add()</code>
     * method.
     */
    public List rules();


}