bundles/org.simantics.debug.browser/src/org/simantics/debug/browser/content/ResourceBrowserRewriterRepository.java

   1 /*******************************************************************************
   2  * Copyright (c) 2016 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     THTH ry - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.debug.browser.content;
  13
  14 import java.util.Arrays;
  15 import java.util.Comparator;
  16
  17 import org.osgi.framework.BundleContext;
  18 import org.osgi.util.tracker.ServiceTracker;
  19 import org.simantics.debug.browser.internal.Activator;
  20
  21 public class ResourceBrowserRewriterRepository {
  22     private static ServiceTracker<ResourceBrowserRewriter, ResourceBrowserRewriter> TRACKER;
  23
  24     private static final Comparator<ResourceBrowserRewriter> REWRITER_COMPARATOR =
  25             new Comparator<ResourceBrowserRewriter>() {
  26         @Override
  27         public int compare(ResourceBrowserRewriter o1,
  28                 ResourceBrowserRewriter o2) {
  29             return Double.compare(o1.getPriority(), o2.getPriority());
  30         }
  31     };
  32
  33     public static ResourceBrowserRewriter[] getRewriters() {
  34         if(TRACKER == null) {
  35             BundleContext context = Activator.getContext();
  36             TRACKER = new ServiceTracker<ResourceBrowserRewriter, ResourceBrowserRewriter>(
  37                     context, ResourceBrowserRewriter.class, null);
  38             TRACKER.open();
  39         }
  40         ResourceBrowserRewriter[] rewriters =
  41                 TRACKER.getServices(new ResourceBrowserRewriter[TRACKER.getTrackingCount()]);
  42         Arrays.sort(rewriters, REWRITER_COMPARATOR);
  43         return rewriters;
  44     }
  45 }