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)

     * @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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        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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     * @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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        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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        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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        // Try to find matching groups (largest access level will be used as
        // accessLevelEntry)


        Set groups = new HashSet(entries);
        groups.retainAll(authSession.getGroups());
        if (groups.size() > 0) {
            // Some groups have been found - find out the one with the highest
            // level
            WGACLEntry maxEntry = null;
            WGACLEntry currentEntry = null;

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            s0.add(channelTarget);
            pendingChannels.remove(channelTarget);
            children=getListeningChannels(channelTarget);
            if(children!=null && !children.isEmpty()) {
                children.retainAll(pendingChannels);
                while(!children.isEmpty()) {
                    // move to the next generation
                    HashSet newChildren=new HashSet();
                    for(Iterator ci=children.iterator();ci.hasNext();) {
                        String childId=(String)ci.next();

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  public Arc getArc(Object source, Object target) {
    Set arcsFromSource = arcsBySource.get(source);
    Set arcsToTarget = arcsByTarget.get(target);
    Set result = Generics.newHashSet();
    result.addAll(arcsFromSource);
    result.retainAll(arcsToTarget); // intersection
    if (result.size() < 1) {
      return null;
    }
    if (result.size() > 1) {
      throw new RuntimeException("Problem in TransducerGraph data structures.");

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