/*
    * 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.shared.jar.identification.exposers;
  
  import javax.inject.Named;
  import javax.inject.Singleton;
  
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  import org.apache.maven.shared.jar.JarAnalyzer;
  import org.apache.maven.shared.jar.identification.JarIdentification;
  import org.apache.maven.shared.jar.identification.JarIdentificationExposer;
  import org.codehaus.plexus.util.FileUtils;
  
  /**
   * Exposer that examines a JAR file to derive Maven metadata from the pattern of the JAR's filename.
   * Will match the format <i>artifactId</i>-<i>version</i>.jar.
   */
  @Singleton
  @Named("filename")
  public class FilenameExposer implements JarIdentificationExposer {
      private static final Pattern VERSION_PATTERN = Pattern.compile("-\\d");
  
      @Override
      public void expose(JarIdentification identification, JarAnalyzer jarAnalyzer) {
          String filename = FileUtils.removeExtension(jarAnalyzer.getFile().getName());
          Matcher mat = VERSION_PATTERN.matcher(filename);
          if (mat.find()) {
              String prefix = filename.substring(0, mat.start());
              identification.addArtifactId(prefix);
              identification.addName(prefix);
              identification.addVersion(filename.substring(mat.end() - 1));
          } else {
              identification.addArtifactId(filename);
              identification.addName(filename);
          }
      }
  }