plugins/org.eclipse.epp.wizard/src/org/eclipse/epp/wizard/internal/ExternalServiceProviderConfiguration.java

/*******************************************************************************
 * Copyright (c) 2008 Innoopract Informationssysteme GmbH.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Innoopract Informationssysteme GmbH - initial API and implementation
 ******************************************************************************/
package org.eclipse.epp.wizard.internal;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;

import org.apache.log4j.Logger;

public class ExternalServiceProviderConfiguration {

  static Logger logger = Logger.getLogger( ExternalServiceProviderConfiguration.class );
  private static final String URL = "url";
  private static final String ICON = "icon";
  private static final String DESCRIPTION = "description";
  private static final String LABEL = "label";
  private static final String PROPERTIES_EXTENSION = ".properties";
  public static class Entry {

    public String label;
    public String description;
    public File icon;

    public String getLabel() {
      return label;
    }

    public String getDescription() {
      return description;
    }

    public File getIcon() {
      return icon;
    }

    public String getUrlTemplate() {
      return urlTemplate;
    }

    public Entry( String label,
                  File icon,
                  String description,
                  String urlTemplate )
    {
      super();
      this.description = description;
      this.icon = icon;
      this.label = label;
      this.urlTemplate = urlTemplate;
    }
    public String urlTemplate;
  }
  private List<Entry> entries = new ArrayList<Entry>();

  public ExternalServiceProviderConfiguration( File externalServiceProviderDirectory )
  {
    for( File propertiesFile : externalServiceProviderDirectory.listFiles() ) {
      if( propertiesFile.getName().endsWith( PROPERTIES_EXTENSION ) ) {
        FileInputStream inStream = null;
        try {
          Properties properties = new Properties();
          inStream = new FileInputStream( propertiesFile );
          properties.load( inStream );
          String label = getMandatoryProperty( properties, LABEL );
          String description = getMandatoryProperty( properties, DESCRIPTION );
          String icon = getMandatoryProperty( properties, ICON );
          String url = getMandatoryProperty( properties, URL );
          Entry entry = new Entry( label,
                                   new File( externalServiceProviderDirectory,
                                             icon ),
                                   description,
                                   url );
          entries.add( entry );
        } catch( Exception exc ) {
          throw new RuntimeException( "Could not load external service provider configuration file'"
                                          + propertiesFile.getAbsolutePath()
                                          + "'",
                                      exc );
        } finally {
          if( inStream != null ) {
            try {
              inStream.close();
            } catch( IOException e ) {
              logger.warn( "Could not close file '" + propertiesFile, e );
            }
          }
        }
      }
    }
  }

  private String getMandatoryProperty( Properties properties, String string ) {
    String result = properties.getProperty( string );
    if( result == null ) {
      throw new RuntimeException( "External service provider key '"
                                  + string
                                  + "' not found in properties" );
    }
    return result;
  }

  public List<Entry> getEntries() {
    return entries;
  }
}