/*

  * Copyright 2001,2004 The Apache Software Foundation.

  * 

  * Licensed 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.commons.jjar;

 import java.util.Properties;

 import java.util.StringTokenizer;

 import java.util.ArrayList;

 import java.util.Iterator;

 import java.util.List;

 import java.io.InputStream;

 import java.net.URL;

 import java.net.URLConnection;

 public class RepositoryProps extends Properties implements Repository

 {

     private List packageList = null;

     private DependencyEngine de = new DependencyEngine();

     public void load( URL url )

     {

         try

         {

             URLConnection conn = url.openConnection();

             InputStream is = conn.getInputStream();

             load(is);

             is.close();

         }

         catch(Exception e )

             {

             }

         /*

          *  get the list of packages

          */

         String packages = getProperty("packages");

         packages.trim();

         packageList = makeList( packages );

         /*

          * setup the dependency engine

          */

         Iterator i = packageList.iterator();

         while( i.hasNext() )

         {

             /*

              * for each package

              */

             String p = (String) i.next();

             //            System.out.println(" processing " + p );

             /*

              *  get the dependency list

              */

             String depstr = getProperty( p + ".dependencies");

             depstr.trim();

             List dep = makeList( depstr );

             /*

              * now, remove an <none> marks

              */

             Iterator ii = dep.iterator();

             List deplist = new ArrayList();

             while( ii.hasNext() )

             {

                 String sdep = (String) ii.next();

                 if ( !sdep.equals("<none>"))

                     deplist.add( sdep );

             }

             try

             {

                 de.addProject( p, deplist, p );

             }

             catch( Exception e )

                 {

                     System.out.println("Repository.Repository() : " + p + " : " + e );

                 }

         }

     }

     public List getDependencyList( String pkg, String version )

     {

         if( isPackage( pkg ))

             return de.getDependencies( pkg );

         return new ArrayList();

     }

     public Iterator getPackageListIter()

     {

         return packageList.iterator();

     }

     public int getPackageCount()

     {

         return packageList.size();

     }

     public String getPackageDefaultVersion( String pkg )

     {

         if (isPackage( pkg ) )

         {

             return getProperty( pkg + ".default" );

         }

         return null;

     }

     public String getPackageDescription( String pkg )

     {

         if (isPackage( pkg ) )

         {

             return getProperty( pkg + ".desc" );

         }

         return null;

     }

     public String getFetchTarget( String pkg, String version )

     {

         if (!isPackage( pkg ))

             return null;

         String ft = getProperty( pkg + "." + version + ".jar");

         return ft;

     }

     public boolean isPackage( String pkg )

     {

         Iterator i = packageList.iterator();

         while( i.hasNext() )

         {

             String p = (String) i.next();

             if (p.equals( pkg ) )

                 return true;

         }

         return false;

     }

     public List getPackageVersionList( String pkg )

     {

         if(!isPackage( pkg ))

            return null;

         return makeList( getProperty( pkg + ".version" ) );

     }

     private List makeList( String thing )

     {

         StringTokenizer st = new StringTokenizer( thing, ", ");

         List list = new ArrayList();

         while(st.hasMoreTokens() )

         {

             list.add( st.nextToken().trim() );

         }

         return list;

     }

 }