Quelle MemoryRuleSet.java Sprache: JAVA

/*
* 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.realm;

import org.apache.tomcat.util.digester.Digester;
import org.apache.tomcat.util.digester.Rule;
import org.apache.tomcat.util.digester.RuleSet;
import org.xml.sax.Attributes;

/**
* 
* RuleSet for recognizing the users defined in the XML file processed by <code>MemoryRealm</code>.
* 
*
* @author Craig R. McClanahan
*/
public class MemoryRuleSet 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 MemoryRuleSet() {
 this("tomcat-users/");
 }

 /**
 * 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 MemoryRuleSet(String prefix) {
 this.prefix = prefix;
 }

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

 /**
 * 
 * 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.
 * 
 *
 * @param digester Digester instance to which the new Rule instances should be added.
 */
 @Override
 public void addRuleInstances(Digester digester) {

 digester.addRule(prefix + "user", new MemoryUserRule());

 }

}

/**
* Private class used when parsing the XML database file.
*/
final class MemoryUserRule extends Rule {

 /**
 * Construct a new instance of this <code>Rule</code>.
 */
 MemoryUserRule() {
 // No initialisation required
 }

 /**
 * Process a <code><user></code> element from the XML database file.
 *
 * @param attributes The attribute list for this element
 */
 @Override
 public void begin(String namespace, String name, Attributes attributes) throws Exception {

 String username = attributes.getValue("username");
 if (username == null) {
 username = attributes.getValue("name");
 }
 String password = attributes.getValue("password");
 String roles = attributes.getValue("roles");

 MemoryRealm realm = (MemoryRealm) digester.peek(digester.getCount() - 1);
 realm.addUser(username, password, roles);

 }

}

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