001/*
002 * Logback: the reliable, generic, fast and flexible logging framework.
003 *  Copyright (C) 1999-2025, QOS.ch. All rights reserved.
004 *
005 * This program and the accompanying materials are dual-licensed under
006 * either the terms of the Eclipse Public License v1.0 as published by
007 * the Eclipse Foundation
008 *
009 *     or (per the licensee's choosing)
010 *
011 * under the terms of the GNU Lesser General Public License version 2.1
012 * as published by the Free Software Foundation.
013 */
014
015package ch.qos.logback.core.boolex;
016
017public class IsPropertyNullCondition  extends PropertyConditionBase {
018
019    String key;
020
021    public void start() {
022        if (key == null) {
023            addError("In IsPropertyNullCondition 'key' parameter cannot be null");
024            return;
025        }
026        super.start();
027    }
028
029
030    public String getKey() {
031        return key;
032    }
033
034    public void setKey(String key) {
035        this.key = key;
036    }
037
038    @Override
039    public boolean evaluate() {
040        return isNull(key);
041    }
042}