Copyright (c) 2008 Sonatype, Inc. All rights reserved.
This program is licensed to you under the Apache License Version 2.0,
and you may not use this file except in compliance with the Apache License Version 2.0.
You may obtain a copy of the Apache License Version 2.0 at http://www.apache.org/licenses/LICENSE-2.0.
Unless required by applicable law or agreed to in writing,
software distributed under the Apache License Version 2.0 is distributed on an
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the Apache License Version 2.0 for the specific language governing permissions and limitations there under.
/**
 * Copyright (c) 2008 Sonatype, Inc. All rights reserved.
 *
 * This program is licensed to you under the Apache License Version 2.0,
 * and you may not use this file except in compliance with the Apache License Version 2.0.
 * You may obtain a copy of the Apache License Version 2.0 at http://www.apache.org/licenses/LICENSE-2.0.
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the Apache License Version 2.0 is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the Apache License Version 2.0 for the specific language governing permissions and limitations there under.
 */
 
package org.sonatype.plexus.components.sec.dispatcher;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import org.sonatype.plexus.components.sec.dispatcher.model.Config;
import org.sonatype.plexus.components.sec.dispatcher.model.ConfigProperty;
import org.sonatype.plexus.components.sec.dispatcher.model.SettingsSecurity;
import org.sonatype.plexus.components.sec.dispatcher.model.io.xpp3.SecurityConfigurationXpp3Reader;

Author:
Oleg Gusakov
Version:
$Id: SecUtil.java 877 2009-02-11 21:58:35Z oleg $/**
 *
 *
 * @author Oleg Gusakov
 * @version $Id: SecUtil.java 877 2009-02-11 21:58:35Z oleg $
 *
 */
public class SecUtil
{
    
    public static final String PROTOCOL_DELIM = "://";
    public static final int    PROTOCOL_DELIM_LEN = PROTOCOL_DELIM.length();
    public static final String [] URL_PROTOCOLS = new String [] {"http","https","dav","file","davs","webdav","webdavs","dav+http","dav+https"};

    public static SettingsSecurity read( String location, boolean cycle )
    throws SecDispatcherException
    {
        if( location == null )
            throw new SecDispatcherException("location to read from is null");
        
        InputStream in = null;
        
        try
        {
            in = toStream( location );
            
            SettingsSecurity sec = new SecurityConfigurationXpp3Reader().read( in );
            
            in.close();
            
            if( cycle && sec.getRelocation() != null )
                return read( sec.getRelocation(), true );
            
            return sec;
        }
        catch ( Exception e )
        {
            throw new SecDispatcherException(e);
        }
        finally
        {
            if( in != null )
                try { in.close(); } catch( Exception e ) {}
        }
    }
    //---------------------------------------------------------------------------------------------------------------
    private static InputStream toStream( String resource )
    throws MalformedURLException, IOException
    {
      if( resource == null )
        return null;
      
      int ind = resource.indexOf( PROTOCOL_DELIM );
      
      if( ind > 1 )
      {
          String protocol = resource.substring( 0, ind );
          resource = resource.substring( ind + PROTOCOL_DELIM_LEN );

          for( int i=0; i<URL_PROTOCOLS.length; i++ )
          {
              String p = URL_PROTOCOLS[i];
              
              if( protocol.regionMatches( true, 0, p, 0, p.length() ) )
                return new URL( p+PROTOCOL_DELIM+resource).openStream();
          }
      }

      return new FileInputStream( new File(resource) );
    }
    //---------------------------------------------------------------------------------------------------------------
    public static Map getConfig( SettingsSecurity sec, String name )
    {
        if( name == null )
            return null;
        
        List cl = sec.getConfigurations();
        
        if( cl == null )
            return null;
        
        for( Iterator i = cl.iterator(); i.hasNext(); )
        {
            Config cf = (Config) i.next();
            
            if( !name.equals( cf.getName() ) )
                continue;
            
            List pl = cf.getProperties();
            
            if( pl == null || pl.isEmpty() )
                return null;
            
            Map res = new HashMap( pl.size() );

            for( Iterator j = pl.iterator(); j.hasNext(); )
            {
                ConfigProperty p = (ConfigProperty) j.next();
                
                res.put( p.getName(), p.getValue() );
            }
            
            return res;
        }
        
        return null;
    }
    //---------------------------------------------------------------------------------------------------------------
}