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.commons.internal.base;
  
  import lombok.experimental.UtilityClass;
  
  /**
   * package private utility for {@link _Strings}
   */
  @UtilityClass
  class _Strings_HtmlEscaper {
  
      // as declared int guava's com.google.common.html.HtmlEscapers
      // order matters: replace '&' first
      private final _Strings.KeyValuePair[] replacements = {
              _Strings.pair("&", "&amp;"),
              _Strings.pair("<", "&lt;"),
              _Strings.pair(">", "&gt;"),
              _Strings.pair("\"", "&quot;"),
              // Note: "&apos;" is not defined in HTML 4.01.
              _Strings.pair("'", "&#39;"),
      };
  
      String htmlEscape(final String input) {
          if(_Strings.isEmpty(input)) return input;
  
          String output = input;
  
          for(_Strings.KeyValuePair replacement : replacements) {
              output = output.replace(replacement.key(), replacement.value());
          }
  
          return output;
      }
  
  }
  