Examples of java.util.List.retainAll()

java.util.List.retainAll()
Retains only the elements in this list that are contained in the specified collection (optional operation). In other words, removes from this list all the elements that are not contained in the specified collection. @param c collection containing elements to be retained in this list @return true if this list changed as a result of the call @throws UnsupportedOperationException if the retainAll operationis not supported by this list @throws ClassCastException if the class of an element of this listis incompatible with the specified collection (optional) @throws NullPointerException if this list contains a null element and thespecified collection does not permit null elements (optional), or if the specified collection is null @see #remove(Object) @see #contains(Object)

      // check replacement
      if( trajRplc == null ) {
//        if( doc.bird.attemptShared( Session.DOOR_TIMETRNSRCV | Session.DOOR_GRP, 250 )) {
//          try {
            collTrns = doc.getActiveTransmitters().getAll();
            collTrns.retainAll( doc.getSelectedTransmitters().getAll() );
            trajRplc = new RealtimeProducer.TrajectoryReplacement(
                    this, new Span( 0, doc.timeline.getLength() ), collTrns );
// EEE
//            transport.addTrajectoryReplacement( trajRplc );
            doc.getRealtimeProducer().requestAddTrajectoryReplacement( trajRplc );

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        try {
            // 2.
        lNiveis = new SisGrupoAtributoDao().getAtributosOrdenados(grupoAtributo);
        
        // 3. 
        lNiveis.retainAll(item.getItemEstruturaNivelIettns());
        
        
      } catch (ECARException e) {
        this.logger.error(e);
      }

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     */
    public List pesquisar(SegmentoSgt segmento, ServletContext application) throws ECARException{
       
       List pesquisa = super.pesquisar(segmento, new String[] {"descricaoSgt","asc"});
     
     pesquisa.retainAll(this.getSegmentosLivres(application));
       
       if(segmento.getSegmentoTpAcessoSgttas() != null){
         /*
          * Percorre o resultado e retira dele todas os segmentos onde
          * dentro da cole��o de SegmentoTpAcessoSgttas n�o existam todos os

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      span = doc.timeline.getSelectionSpan();
      collTransmitterPath.clear();
      if( span.getLength() < 2 ) return;


      collTrns  = doc.getActiveTransmitters().getAll();
      collTrns.retainAll( doc.getSelectedTransmitters().getAll() );
      
      for( int i = 0; i < collTrns.size(); i++ ) {
        trns  = (Transmitter) collTrns.get( i );
//        at    = trns.getTrackEditor();
        dwt    = trns.getDecimatedWaveTrail();

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            if(tileIndices != null && tileIndices.length > 0) {
                // Create a Set from the supplied indices.
                List tileIndexList = Arrays.asList(tileIndices);


                // Retain only indices which were actually in the request.
                tileIndexList.retainAll(reqIndexList);


                indices = (Point[])tileIndexList.toArray(new Point[0]);
            } else {
                indices = (Point[])reqIndexList.toArray(new Point[0]);
            }

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      } 
      catch (UnsupportedOperationException good) {}
      
      try 
      { 
         fciTargets.retainAll(targets);
         fail("retainAll call did not fail");
      } 
      catch (UnsupportedOperationException good) {}
      
      Iterator iter = fciTargets.iterator();

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                getLeftResultSet().getAllResultColumns(null);
        ResultColumnList rightRCL =
                getRightResultSet().getAllResultColumns(null);


        List columnNames = extractColumnNames(leftRCL);
        columnNames.retainAll(extractColumnNames(rightRCL));


        ResultColumnList commonColumns =
                (ResultColumnList) getNodeFactory().getNode(
                        C_NodeTypes.RESULT_COLUMN_LIST,
                        getContextManager());

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/*      */       Point[] indices;
/* 1286 */       if ((tileIndices != null) && (tileIndices.length > 0))
/*      */       {
/* 1288 */         List tileIndexList = Arrays.asList(tileIndices);
/*      */ 
/* 1291 */         tileIndexList.retainAll(reqIndexList);
/*      */ 
/* 1293 */         indices = (Point[])tileIndexList.toArray(new Point[0]);
/*      */       } else {
/* 1295 */         indices = (Point[])reqIndexList.toArray(new Point[0]);
/*      */       }

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/*      */       Point[] indices;
/* 1286 */       if ((tileIndices != null) && (tileIndices.length > 0))
/*      */       {
/* 1288 */         List tileIndexList = Arrays.asList(tileIndices);
/*      */ 
/* 1291 */         tileIndexList.retainAll(reqIndexList);
/*      */ 
/* 1293 */         indices = (Point[])tileIndexList.toArray(new Point[0]);
/*      */       } else {
/* 1295 */         indices = (Point[])reqIndexList.toArray(new Point[0]);
/*      */       }

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        try
        {
            List groups = new ArrayList(registry.getGroupsForUser(principal.getName()));


            groups.retainAll(roles);
           
            // if authorization succeeds, set the user's Subject on this invocation context
            // so that the rest of the Thread is executed in the context of the appropriate Subject
            if (groups.size() > 0)
                ContextManagerFactory.getInstance().setCallerSubject(((WSLCPrincipal)principal).getSubject());

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