001    /**
002     * Copyright 2010-2012 The Kuali Foundation
003     *
004     * Licensed under the Educational Community License, Version 2.0 (the "License");
005     * you may not use this file except in compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     * http://www.opensource.org/licenses/ecl2.php
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS,
012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     * See the License for the specific language governing permissions and
014     * limitations under the License.
015     */
016    package org.kuali.common.util.nullify;
017    
018    import org.apache.commons.lang3.StringUtils;
019    import org.kuali.common.util.property.Constants;
020    
021    public class NullUtils {
022    
023            public static final boolean isNull(String s) {
024                    if (s == null) {
025                            return true;
026                    } else {
027                            return StringUtils.equalsIgnoreCase(Constants.NULL, s);
028                    }
029            }
030    
031            public static final boolean isNone(String s) {
032                    return StringUtils.equalsIgnoreCase(Constants.NONE, s);
033            }
034    
035            public static final boolean isNullOrNone(String s) {
036                    return isNull(s) || isNone(s);
037            }
038    }