/*
    * 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.plugins.jdeprscan.consumers;
  
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.HashSet;
  import java.util.Map;
  import java.util.Set;
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  import org.codehaus.plexus.util.cli.CommandLineUtils;
  import org.codehaus.plexus.util.cli.StreamConsumer;
  
  /**
   * Consumes output of jdeprscan tool
   *
   * @author Robert Scholte
   * @since 3.0.0
   */
  public class JDeprScanConsumer extends CommandLineUtils.StringStreamConsumer implements StreamConsumer {
  
      private final Map<String, Set<String>> deprecatedClasses = new HashMap<>();
  
      private final Map<String, Set<String>> deprecatedMethods = new HashMap<>();
  
      public static final Pattern DEPRECATED_CLASS = Pattern.compile("^class (\\S+) uses deprecated class (\\S+)");
  
      public static final Pattern DEPRECATED_METHOD = Pattern.compile("^class (\\S+) uses deprecated method (\\S+)");
  
      public Map<String, Set<String>> getDeprecatedClasses() {
          return Collections.unmodifiableMap(deprecatedClasses);
      }
  
      public Map<String, Set<String>> getDeprecatedMethods() {
          return Collections.unmodifiableMap(deprecatedMethods);
      }
  
      @Override
      public void consumeLine(String line) {
          super.consumeLine(line);
  
          Matcher deprecatedClassMatcher = DEPRECATED_CLASS.matcher(line);
          matcherCollector(deprecatedClassMatcher, deprecatedClasses);
  
          Matcher deprecatedMethodMatcher = DEPRECATED_METHOD.matcher(line);
          matcherCollector(deprecatedMethodMatcher, deprecatedMethods);
      }
  
      private void matcherCollector(Matcher matcher, Map<String, Set<String>> deprecatedMethods) {
          if (!matcher.find()) {
              return;
          }
  
          Set<String> dm = deprecatedMethods.computeIfAbsent(matcher.group(1), k -> new HashSet<>());
          dm.add(matcher.group(2));
      }
  }