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)

            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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            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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     *  @return A RecordToken containing the result.
     */
    public static Token intersect(RecordToken record1, RecordToken record2)
            throws IllegalActionException {
        Set commonNames = new HashSet(record1.labelSet());
        commonNames.retainAll(record2.labelSet());


        Token[] values = new Token[commonNames.size()];
        String[] names = new String[values.length];
        int i = 0;

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                        Object oa = ((ObjectToken) a).getValue();
                        Object ob = ((ObjectToken) b).getValue();


                        if (oa instanceof Set && ob instanceof Collection) {
                            Set result = new HashSet((Set) oa);
                            result.retainAll((Collection) ob);
                            return new ObjectToken(result);
                        } else {
                            throw new InterpreterException(
                                    "Unknown object types: expected Set and Collection.");
                        }

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        Set thatOutputs = automaton.outputNameSet();
        Set thatInternals = automaton.internalTransitionNameSet();


        thatInputs.retainAll(thisInternals);
        thatOutputs.retainAll(thisInternals);
        thatInternals.retainAll(thisInternals);


        if (!thatInputs.isEmpty() || !thatOutputs.isEmpty()
                || !thatInternals.isEmpty()) {
            throw new IllegalActionException(
                    message

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        Set thisInputs = this.inputNameSet();
        Set thisOutputs = this.outputNameSet();
        thisInternals = this.internalTransitionNameSet();


        thisInputs.retainAll(thatInternals);
        thisOutputs.retainAll(thatInternals);
        thisInternals.retainAll(thatInternals);


        if (!thisInputs.isEmpty() || !thisOutputs.isEmpty()
                || !thisInternals.isEmpty()) {
            throw new IllegalActionException(

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        }


        // check the output transitions do not overlap
        thisOutputs = this.outputNameSet();
        thatOutputs = automaton.outputNameSet();
        thisOutputs.retainAll(thatOutputs);


        if (!thisOutputs.isEmpty()) {
            throw new IllegalActionException(message + "the output "
                    + "transitions of the two overlap.");
        }

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            for (int j = 0; j < intersected.length; j++) {
                Collection arts = getArtifactsIncludingExtending(intersected[j]);
                if (intersectedArtifacts.isEmpty()) {
                    intersectedArtifacts.addAll(arts);
                } else {
                    intersectedArtifacts.retainAll(arts);
                }
            }
            if (artifacts != null) {
                intersectedArtifacts.addAll(artifacts);
            }

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     * @see org.apache.slide.webdav.util.DaslConstants
     */
    public Set getSupportedLiveProperties( String filter ) {
        Set s = getSupportedLiveProperties( new String[0] );
        if( Q_COMPUTED_ONLY.equals(filter) ) {
            s.retainAll( computedProperties );
        }
        if( Q_PROTECTED_ONLY.equals(filter) ) {
            s.retainAll( protectedProperties );
        }
        return s;

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        Set s = getSupportedLiveProperties( new String[0] );
        if( Q_COMPUTED_ONLY.equals(filter) ) {
            s.retainAll( computedProperties );
        }
        if( Q_PROTECTED_ONLY.equals(filter) ) {
            s.retainAll( protectedProperties );
        }
        return s;
    }
    
    /**

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