| /* |
| * 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.log4j.rule; |
| |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.Stack; |
| import org.apache.log4j.chainsaw.logevents.ChainsawLoggingEvent; |
| |
| /** |
| * A Rule class implementing logical not. |
| * |
| * @author Scott Deboy (sdeboy@apache.org) |
| */ |
| public class NotRule extends AbstractRule { |
| /** |
| * Serialization ID. |
| */ |
| static final long serialVersionUID = -6827159473117969306L; |
| /** |
| * Enclosed rule. |
| */ |
| private final Rule rule; |
| |
| /** |
| * Create new instance. |
| * @param rule enclosed rule. |
| */ |
| private NotRule(final Rule rule) { |
| super(); |
| this.rule = rule; |
| } |
| |
| /** |
| * Create new instance. |
| * @param rule enclosed rule. |
| * @return new rule. |
| */ |
| public static Rule getRule(final Rule rule) { |
| return new NotRule(rule); |
| } |
| |
| /** |
| * Create new instance from top element of stack. |
| * @param stack stack |
| * @return new rule. |
| */ |
| public static Rule getRule(final Stack stack) { |
| if (stack.size() < 1) { |
| throw new IllegalArgumentException( |
| "Invalid NOT rule - expected one rule but received " |
| + stack.size()); |
| } |
| Object o1 = stack.pop(); |
| if (o1 instanceof Rule) { |
| Rule p1 = (Rule) o1; |
| return new NotRule(p1); |
| } |
| throw new IllegalArgumentException( |
| "Invalid NOT rule: - expected rule but received " + o1); |
| } |
| |
| /** {@inheritDoc} */ |
| public boolean evaluate(final ChainsawLoggingEvent event, Map matches) { |
| if (matches == null) { |
| return !(rule.evaluate(event, null)); |
| } |
| Map tempMatches = new HashMap(); |
| boolean result = !(rule.evaluate(event, tempMatches)); |
| if (result) { |
| for (Iterator iter = tempMatches.entrySet().iterator();iter.hasNext();) { |
| Map.Entry entry = (Map.Entry)iter.next(); |
| Object key = entry.getKey(); |
| Set value = (Set)entry.getValue(); |
| Set mainSet = (Set) matches.get(key); |
| if (mainSet == null) { |
| mainSet = new HashSet(); |
| matches.put(key, mainSet); |
| } |
| mainSet.addAll(value); |
| } |
| } |
| return result; |
| } |
| } |