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)

      {
         lock.readLock().lock();
         try
         {
            Set state = getCurrentState(true);
            return state.retainAll(c);
         }
         finally
         {
            lock.readLock().unlock();
         }

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     */
    private Set determineCommonDeclarations()
    {
        Set commonDeclarations = new HashSet( this.leftInput.getTupleDeclarations( ) );


        commonDeclarations.retainAll( this.rightInput.getTupleDeclarations( ) );


        return commonDeclarations.isEmpty( ) ? Collections.EMPTY_SET : Collections.unmodifiableSet( commonDeclarations );
    }


    // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

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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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        return result;
    }
    
    protected void runTest() throws Throwable {
        Set signatures = getMethodSignatures(omInterface);
        signatures.retainAll(getMethodSignatures(domInterface));
        if (exceptions != null) {
            signatures.removeAll(Arrays.asList(exceptions));
        }
        if (!signatures.isEmpty()) {
            fail("Method collision detected for the following methods: " + signatures);

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        for (int i = 0; i < actions.size(); i++) {
            MultiIndex.Action a = (MultiIndex.Action) actions.get(i);
            if (a.getType() == MultiIndex.Action.TYPE_COMMIT) {
                transactionIds.clear();
            } else if (a.getType() == MultiIndex.Action.TYPE_VOLATILE_COMMIT) {
                transactionIds.retainAll(losers);
                // check if transactionIds contains losers
                if (transactionIds.size() > 0) {
                    // found dirty volatile commit
                    break;
                } else {

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    private static Method getCallbackMethod(Class cls) {
        // Look at only public methods defined by the Callback class
        Method[] pubMethods = cls.getDeclaredMethods();
        Method[] classMethods = cls.getMethods();
        Set pmethods = new HashSet(Arrays.asList(pubMethods));
        pmethods.retainAll(Arrays.asList(classMethods));


        // Remove Object methods disallowed as callback method names 
        for (Iterator i=pmethods.iterator();i.hasNext();) {
            Method m = (Method)i.next();
            if (Callback.FORBIDDEN_NAMES.contains(m.getName())) {

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    private static Method getCallbackMethod(Class cls) {
        // Look at only public methods defined by the Callback class
        Method[] pubMethods = cls.getDeclaredMethods();
        Method[] classMethods = cls.getMethods();
        Set pmethods = new HashSet(Arrays.asList(pubMethods));
        pmethods.retainAll(Arrays.asList(classMethods));


        // Remove Object methods disallowed as callback method names 
        for (Iterator i=pmethods.iterator();i.hasNext();) {
            Method m = (Method)i.next();
            if (Callback.FORBIDDEN_NAMES.contains(m.getName())) {

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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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     * @see org.apache.slide.webdav.util.DaslConstants
     */
    public Set getSupportedLiveProperties( String filter, String[] excludedFeatures ) {
        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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