/*
    * 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.maven.model.interpolation;
  
  import java.util.HashSet;
  import java.util.Set;
  
  import org.apache.maven.model.path.UrlNormalizer;
  import org.codehaus.plexus.interpolation.InterpolationPostProcessor;
  
  /**
   * Ensures that expressions referring to URLs evaluate to normalized URLs.
   *
   */
  class UrlNormalizingPostProcessor implements InterpolationPostProcessor {
  
      private static final Set<String> URL_EXPRESSIONS;
  
      static {
          Set<String> expressions = new HashSet<>();
          expressions.add("project.url");
          expressions.add("project.scm.url");
          expressions.add("project.scm.connection");
          expressions.add("project.scm.developerConnection");
          expressions.add("project.distributionManagement.site.url");
  
          URL_EXPRESSIONS = expressions;
      }
  
      private UrlNormalizer normalizer;
  
      UrlNormalizingPostProcessor(UrlNormalizer normalizer) {
          this.normalizer = normalizer;
      }
  
      @Override
      public Object execute(String expression, Object value) {
          if (value != null && URL_EXPRESSIONS.contains(expression)) {
              return normalizer.normalize(value.toString());
          }
  
          return null;
      }
  }