com.crsn.maven.utils.osgirepo.osgi.OsgiRepository Maven / Gradle / Ivy

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The kar-packager is a small Maven Plugin to create Apache Karaf Archives (.kar) from a given folder. Everything the folder needs to contain are the bundles to make up the archive.

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package com.crsn.maven.utils.osgirepo.osgi;

import java.io.File;
import java.util.Collections;
import java.util.Comparator;
import java.util.LinkedList;
import java.util.List;
import java.util.TreeSet;

public class OsgiRepository {

  private List bundles;

  private OsgiRepository( List bundles ) {
    this.bundles = bundles;
  }

  public static OsgiRepository createRepository( File directory ) {
    LinkedList bundles = new LinkedList();
    if( directory == null ) {
      throw new NullPointerException( "Null directory." );
    }
    File[] listFiles = directory.listFiles();
    for( File file : listFiles ) {
      addBundleToRepository( bundles, file );
    }
    return new OsgiRepository( bundles );
  }

  private static void addBundleToRepository( LinkedList bundles, File file ) {
    try {
      boolean isJarBundle = file.isFile() && file.getName().toLowerCase().endsWith( "jar" );
      if( isJarBundle ) {
        JarOsgiBundle osgiBundle = JarOsgiBundle.createBundle( file );
        addBundle( bundles, osgiBundle );
      } else if( file.isDirectory() ) {
        DirectoryOsgiBundle osgiBundle;
        osgiBundle = DirectoryOsgiBundle.createBundle( file );
        addBundle( bundles, osgiBundle );
      }
    } catch( IsNotBundleException e ) {
      throw new IllegalStateException( "Could not create bundle.", e );
    }
  }

  private static void addBundle( LinkedList plugins, OsgiBundle osgiPlugin ) {
    plugins.add( osgiPlugin );
  }

  public static OsgiRepository createRepository( List plugins ) {
    return new OsgiRepository( new LinkedList( plugins ) );
  }

  public List getPlugins() {
    return Collections.unmodifiableList( bundles );
  }

  public OsgiBundle resolveDependency( OsgiDependency dependency ) {
    if( dependency == null ) {
      throw new NullPointerException( "Null dependency." );
    }
    TreeSet resolved = new TreeSet( new Comparator() {

      @Override
      public int compare( OsgiBundle o1, OsgiBundle o2 ) {
        return o1.getVersion().compareTo( o2.getVersion() );
      }
    } );
    for( OsgiBundle osgiPlugin : this.bundles ) {
      if( dependency.isResolvedBy( osgiPlugin ) ) {
        resolved.add( osgiPlugin );
      }
    }
    if( resolved.isEmpty() ) {
      return null;
    }
    return resolved.last();
  }
}