/*
    * Copyright (C) 2007-2012 Argeo GmbH
    *
    * 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.argeo.slc.repo.osgi;
  
  import java.io.InputStream;
  import java.net.URL;
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.List;
  import java.util.Properties;
  
  import org.apache.commons.io.IOUtils;
  import org.argeo.slc.SlcException;
  
  /**
   * Wraps an OSGi profile, simplifying access to its values such as system
   * packages, etc.
   */
  public class OsgiProfile {
  	public final static String PROP_SYSTEM_PACKAGES = "org.osgi.framework.system.packages";
  
  	public final static OsgiProfile PROFILE_JAVA_SE_1_6 = new OsgiProfile(
  			"JavaSE-1.6.profile");
  
  	private final URL url;
  	private final Properties properties;
  
  	public OsgiProfile(URL url) {
  		this.url = url;
  		properties = new Properties();
  		InputStream in = null;
  		try {
  			properties.load(this.url.openStream());
  		} catch (Exception e) {
  			throw new SlcException("Cannot initalize OSGi profile " + url, e);
  		} finally {
  			IOUtils.closeQuietly(in);
  		}
  	}
  
  	public OsgiProfile(String name) {
  		this(OsgiProfile.class.getClassLoader().getResource(
  				'/'
  						+ OsgiProfile.class.getPackage().getName()
  								.replace('.', '/') + '/' + name));
  	}
  
  	public List<String> getSystemPackages() {
  		String[] splitted = properties.getProperty(PROP_SYSTEM_PACKAGES).split(
  				",");
  		List<String> res = new ArrayList<String>();
  		for (String pkg : splitted) {
  			res.add(pkg.trim());
  		}
  		return Collections.unmodifiableList(res);
  	}
  }