Examples of com.db4o.ObjectContainer.ext()

com.db4o.ObjectContainer.ext()
returns an ObjectContainer with extended functionality.

Every ObjectContainer that db4o provides can be casted to an ExtObjectContainer. This method is supplied for your convenience to work without a cast.

The ObjectContainer functionality is split to two interfaces to allow newcomers to focus on the essential methods.

@return this, casted to ExtObjectContainer

   * TODO Provide a full copy mode (that includes IConditionalGet an NewsCounter)
   */
  @SuppressWarnings("unused")
  private void copyDatabase() {
      ObjectContainer db = Db4o.openFile(getDBFilePath() + "50");
      db.ext().configure().queries().evaluationMode(QueryEvaluationMode.IMMEDIATE);
      for (Folder type : fObjectContainer.query(Folder.class))  {
        fObjectContainer.activate(type, Integer.MAX_VALUE);
        if (type.getParent() == null) {
          db.ext().set(type, Integer.MAX_VALUE);
        }

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      ObjectContainer db = Db4o.openFile(getDBFilePath() + "50");
      db.ext().configure().queries().evaluationMode(QueryEvaluationMode.IMMEDIATE);
      for (Folder type : fObjectContainer.query(Folder.class))  {
        fObjectContainer.activate(type, Integer.MAX_VALUE);
        if (type.getParent() == null) {
          db.ext().set(type, Integer.MAX_VALUE);
        }
      }
      for (Feed feed : fObjectContainer.query(Feed.class)) {
        fObjectContainer.activate(feed, Integer.MAX_VALUE);
        db.ext().set(feed, Integer.MAX_VALUE);

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          db.ext().set(type, Integer.MAX_VALUE);
        }
      }
      for (Feed feed : fObjectContainer.query(Feed.class)) {
        fObjectContainer.activate(feed, Integer.MAX_VALUE);
        db.ext().set(feed, Integer.MAX_VALUE);
      }
      for (Preference pref : fObjectContainer.query(Preference.class)) {
        fObjectContainer.activate(pref, Integer.MAX_VALUE);
        db.ext().set(pref, Integer.MAX_VALUE);
      }

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        fObjectContainer.activate(feed, Integer.MAX_VALUE);
        db.ext().set(feed, Integer.MAX_VALUE);
      }
      for (Preference pref : fObjectContainer.query(Preference.class)) {
        fObjectContainer.activate(pref, Integer.MAX_VALUE);
        db.ext().set(pref, Integer.MAX_VALUE);
      }
      List<Counter> counterSet = fObjectContainer.query(Counter.class);
      Counter counter = counterSet.iterator().next();
      fObjectContainer.activate(counter, Integer.MAX_VALUE);
      db.ext().set(counter, Integer.MAX_VALUE);

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        db.ext().set(pref, Integer.MAX_VALUE);
      }
      List<Counter> counterSet = fObjectContainer.query(Counter.class);
      Counter counter = counterSet.iterator().next();
      fObjectContainer.activate(counter, Integer.MAX_VALUE);
      db.ext().set(counter, Integer.MAX_VALUE);


      db.commit();
  }


  private Configuration createConfiguration() {

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    oc = Db4o.openFile(configFactory.createConfiguration(), dbFileName);


    /* Preference */
    for (Preference pref : oc.query(Preference.class)) {
      oc.activate(pref, Integer.MAX_VALUE);
      oc.ext().set(convertPref(pref), Integer.MAX_VALUE);
      oc.delete(pref);
    }
    oc.commit();
    /* 20 */
    progressMonitor.worked(10);

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    for (org.rssowl.core.persist.ISearchField searchField : oc.query(org.rssowl.core.internal.persist.SearchField.class))   {
      oc.activate(searchField, Integer.MAX_VALUE);
      String entityName = searchField.getEntityName();
      entityName = entityName.replace("core.model.types", "core.persist");
      MigrationHelper.setField(searchField, "fEntityName", entityName);
      oc.ext().set(searchField, Integer.MAX_VALUE);
    }
    oc.commit();
    /* 30 */
    progressMonitor.worked(10);

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    for (org.rssowl.core.persist.ISearchCondition searchCond : oc.query(org.rssowl.core.internal.persist.SearchCondition.class))   {
      oc.activate(searchCond, Integer.MAX_VALUE);
      int searchSpecOrdinal = searchCond.getSpecifier().ordinal();
      org.rssowl.core.persist.SearchSpecifier searchSpec = org.rssowl.core.persist.SearchSpecifier.values()[searchSpecOrdinal];
      MigrationHelper.setField(searchCond, "fSpecifier", searchSpec);
      oc.ext().set(searchCond, Integer.MAX_VALUE);
    }
    oc.commit();
    /* 40 */
    progressMonitor.worked(10);

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      MigrationHelper.setField(folder, "fChildren", children);
      folders.add(folder);
    }
    /* Only save folders once they have all been updated */
    for (org.rssowl.core.persist.IFolder folder : folders)   {
      oc.ext().set(folder, Integer.MAX_VALUE);
    }


    List<org.rssowl.core.persist.IMark> marks = new ArrayList<org.rssowl.core.persist.IMark>();
    for (org.rssowl.core.persist.IMark mark : oc.query(org.rssowl.core.internal.persist.Mark.class))   {
      oc.activate(mark, Integer.MAX_VALUE);

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      marks.add(mark);
    }
    /* Only save folders once they have all been updated */
    for (org.rssowl.core.persist.IMark mark : marks)   {
      oc.ext().set(mark, Integer.MAX_VALUE);
    }


    oc.commit();
    /* 80 */
    progressMonitor.worked(40);

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