content: /*
   *  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.causeway.persistence.querydsl.applib.util;
  
  import java.util.regex.Pattern;
  
  import org.jspecify.annotations.Nullable;
  
  import org.jspecify.annotations.NonNull;
  import lombok.experimental.UtilityClass;
  
  /**
   * Utility methods to convert between UI &quot;wildcards&quot; (meaning &quot;*&quot; and &quot;?&quot;), ANSI SQL
   * wildcards (&quot;%&quot; and &quot;_&quot;) and Regex (&quot;.*&quot; and &quot;.&quot;).
   *
   * @since 2.1 {@index}
   */
  @UtilityClass
  public class Wildcards {
  
      public final static Pattern REGEX_PATTERN = Pattern.compile("\\(\\?i\\)"); // Pattern to recognize #wildcardToCaseInsensitiveRegex conversion
  
      public String toAnsiSqlWildcard(final String search) {
          if (REGEX_PATTERN.matcher(search).find()) {
              // Don't replace anything when regex is given
              return search;
          }
          String result = search.replace("*", "%").replace("?", "_");
          if (!result.contains("%") && !result.contains("_")) {
              result = "%" + result + "%";
          }
          return result;
      }
  
      public String wildcardToRegex(
              final @Nullable String searchPattern,
              final CaseSensitivity caseSensitivity
      ) {
          var searchPatternWithWildcards = withWildcards(searchPattern);
          var searchPatternAsRegex = wildToRegex(searchPatternWithWildcards);
          switch (caseSensitivity) {
              case INSENSITIVE:
                  return "(?i)".concat(searchPatternAsRegex);
              case SENSITIVE:
              default:
                  return searchPatternAsRegex;
          }
      }
  
      private String withWildcards(final @Nullable String searchPattern) {
          if(searchPattern == null || searchPattern.isEmpty()) {
              return "*";
          }
          return searchPattern.contains("*") || searchPattern.contains("?")
                  ? searchPattern
                  : "*" + searchPattern + "*";
      }
  
      private String wildToRegex(final @NonNull String pattern) {
          return pattern.replace("*", ".*").replace("?", ".");
      }
  
  }