Examples of java.util.Set.retainAll()

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

        Set s = getSupportedLiveProperties( excludedFeatures );
        if( Q_COMPUTED_ONLY.equals(filter) ) {
            s.retainAll( computedProperties );
        }
        if( Q_PROTECTED_ONLY.equals(filter) ) {
            s.retainAll( protectedProperties );
        }
        return s;
    }
    
    /**

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    this.rhs = rhs;
  }


  public Set matchingElements() {
    Set intersection = ProfileElement.profiles(lhs.matchingElements());
    intersection.retainAll(ProfileElement.profiles(rhs.matchingElements()));
    Set rc = ProfileElement.elements(intersection, lhs.matchingElements());
    rc.addAll(ProfileElement.elements(intersection, rhs.matchingElements()));
    return rc;
  }

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  public static String[] getDifference(String oldValue, String newValue) {
    Set oldSet= deserialize(oldValue);
    Set newSet= deserialize(newValue);
    Set intersection= new HashSet(oldSet);
    intersection.retainAll(newSet);
    oldSet.removeAll(intersection);
    newSet.removeAll(intersection);
    oldSet.addAll(newSet);
    return (String[]) oldSet.toArray(new String[oldSet.size()]);
  }

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        while (!intersection.isEmpty() && i.hasNext()) {
            ListData nextItem = asList((SimpleData) i.next());
            if (nextItem == null)
                intersection = Collections.EMPTY_SET;
            else
                intersection.retainAll(nextItem.asList());
        }


        return getResult(intersection);
    }

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            Set declaredArtifacts = buildDeclaredArtifacts( project );
            
            Set usedArtifacts = buildUsedArtifacts( artifactClassMap, dependencyClasses );
            
            Set usedDeclaredArtifacts = new LinkedHashSet( declaredArtifacts );
            usedDeclaredArtifacts.retainAll( usedArtifacts );


            Set usedUndeclaredArtifacts = new LinkedHashSet( usedArtifacts );
            usedUndeclaredArtifacts = removeAll( usedUndeclaredArtifacts, declaredArtifacts );


            Set unusedDeclaredArtifacts = new LinkedHashSet( declaredArtifacts );

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                if (!acls.contains(GroupPrincipal.ANY)) { 
                    Subject subject = exchange.getMessage("in").getSecuritySubject();
                    if (subject == null) {
                        throw new SecurityException("User not authenticated");
                    }
                    acls.retainAll(subject.getPrincipals());
                    if (acls.size() == 0) {
                        throw new SecurityException("Endpoint is not authorized for this user");
                    }
                }
            }

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          for (int i = 0; i < cells.length; i++) {
            all.addAll(getPorts(cells[i]));
            all.add(cells[i]);
          }
          all.addAll(DefaultGraphModel.getEdges(graphModel, cells));
          all.retainAll(visibleSet);
          all.remove(null);
          return all.toArray();
        }
      }
    }

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    protected Token _add(Token rightArgument) throws IllegalActionException {
        RecordToken recordToken = (RecordToken) rightArgument;


        Set intersectionSet = new HashSet();
        intersectionSet.addAll(_fields.keySet());
        intersectionSet.retainAll(recordToken._fields.keySet());


        Iterator labels = intersectionSet.iterator();
        int size = intersectionSet.size();
        String[] newLabels = new String[size];
        Token[] newValues = new Token[size];

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    protected Token _divide(Token rightArgument) throws IllegalActionException {
        RecordToken recordToken = (RecordToken) rightArgument;


        Set intersectionSet = new HashSet();
        intersectionSet.addAll(_fields.keySet());
        intersectionSet.retainAll(recordToken._fields.keySet());


        Iterator labels = intersectionSet.iterator();
        int size = intersectionSet.size();
        String[] newLabels = new String[size];
        Token[] newValues = new Token[size];

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    protected Token _modulo(Token rightArgument) throws IllegalActionException {
        RecordToken recordToken = (RecordToken) rightArgument;


        Set intersectionSet = new HashSet();
        intersectionSet.addAll(_fields.keySet());
        intersectionSet.retainAll(recordToken._fields.keySet());


        Iterator labels = intersectionSet.iterator();
        int size = intersectionSet.size();
        String[] newLabels = new String[size];
        Token[] newValues = new Token[size];

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