solr/solrj/src/java/org/apache/solr/common/StringUtils.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.solr.common;

public class StringUtils {
  
  public static boolean isEmpty(String s) {
    return (s == null) || s.isEmpty();
  }

  /**
   * A "null-safe" equals method.  Returns true if the two provided references are both null, or if they are string-equal.
   */
  public static boolean equals(String first, String second) {
    if (first == null) {
      return second == null;
    }
    return first.equals(second);
  }

}