/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.catalina.startup;

import org.apache.tomcat.util.digester.Digester;
import org.apache.tomcat.util.digester.RuleSet;

/**
 * <p><strong>RuleSet</strong> for processing the contents of a
 * Engine definition element.  This <code>RuleSet</code> does NOT include
 * any rules for nested Host elements, which should be added via instances of
 * <code>HostRuleSet</code>.</p>
 *
 * @author Craig R. McClanahan
 */
public class EngineRuleSet implements RuleSet {

    // ----------------------------------------------------- Instance Variables

    /**
     * The matching pattern prefix to use for recognizing our elements.
     */
    protected final String prefix;


    // ------------------------------------------------------------ Constructor

    /**
     * Construct an instance of this <code>RuleSet</code> with the default
     * matching pattern prefix.
     */
    public EngineRuleSet() {
        this("");
    }


    /**
     * Construct an instance of this <code>RuleSet</code> with the specified
     * matching pattern prefix.
     *
     * @param prefix Prefix for matching pattern rules (including the
     *  trailing slash character)
     */
    public EngineRuleSet(String prefix) {
        this.prefix = prefix;
    }


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

    /**
     * <p>Add the set of Rule instances defined in this RuleSet to the
     * specified <code>Digester</code> instance, associating them with
     * our namespace URI (if any).  This method should only be called
     * by a Digester instance.</p>
     *
     * @param digester Digester instance to which the new Rule instances
     *  should be added.
     */
    @Override
    public void addRuleInstances(Digester digester) {

        digester.addObjectCreate(prefix + "Engine",
                                 "org.apache.catalina.core.StandardEngine",
                                 "className");
        digester.addSetProperties(prefix + "Engine");
        digester.addRule(prefix + "Engine",
                         new LifecycleListenerRule
                         ("org.apache.catalina.startup.EngineConfig",
                          "engineConfigClass"));
        digester.addSetNext(prefix + "Engine",
                            "setContainer",
                            "org.apache.catalina.Engine");

        //Cluster configuration start
        digester.addObjectCreate(prefix + "Engine/Cluster",
                                 null, // MUST be specified in the element
                                 "className");
        digester.addSetProperties(prefix + "Engine/Cluster");
        digester.addSetNext(prefix + "Engine/Cluster",
                            "setCluster",
                            "org.apache.catalina.Cluster");
        //Cluster configuration end

        digester.addObjectCreate(prefix + "Engine/Listener",
                                 null, // MUST be specified in the element
                                 "className");
        digester.addSetProperties(prefix + "Engine/Listener");
        digester.addSetNext(prefix + "Engine/Listener",
                            "addLifecycleListener",
                            "org.apache.catalina.LifecycleListener");


        digester.addRuleSet(new RealmRuleSet(prefix + "Engine/"));

        digester.addObjectCreate(prefix + "Engine/Valve",
                                 null, // MUST be specified in the element
                                 "className");
        digester.addSetProperties(prefix + "Engine/Valve");
        digester.addSetNext(prefix + "Engine/Valve",
                            "addValve",
                            "org.apache.catalina.Valve");
    }
}