package org.apache.maven.shared.dependency.analyzer;

 /*

  * 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.

  */

 import java.io.IOException;

 import java.net.URL;

 import java.util.Set;

 import java.util.zip.ZipException;

 import org.codehaus.plexus.component.annotations.Component;

 /**

  *

  *

  * @author <a href="mailto:markhobson@gmail.com">Mark Hobson</a>

  * @version $Id: DefaultClassAnalyzer.java 1178573 2011-10-03 20:53:48Z hboutemy $

  */

 @Component( role = ClassAnalyzer.class )

 public class DefaultClassAnalyzer

     implements ClassAnalyzer

 {

     // ClassAnalyzer methods --------------------------------------------------

     public Set<String> analyze( URL url )

         throws IOException

     {

         CollectorClassFileVisitor visitor = new CollectorClassFileVisitor();

         try

         {

             ClassFileVisitorUtils.accept( url, visitor );

         }

         catch( ZipException e )

         {

             // since the current ZipException gives no indication what jar file is corrupted

             // we prefer to wrap another ZipException for better error visibility

             ZipException ze = new ZipException( "Cannot process Jar entry on URL: " + url + " due to " + e.getMessage() );

             ze.initCause( e );

             throw ze;

         }

         return visitor.getClasses();

     }

 }