Examples of org.apache.commons.collections.iterators.FilterIterator

Package org.apache.commons.collections.iterators

Examples of org.apache.commons.collections.iterators.FilterIterator

org.apache.commons.collections.iterators.FilterIterator
Decorates an iterator such that only elements matching a predicate filter are returned. @since Commons Collections 1.0 @version $Revision: 1.8 $ $Date: 2004/02/18 00:59:50 $ @author James Strachan @author Jan Sorensen @author Ralph Wagner @author Stephen Colebourne

        if (logger.isDebugEnabled())
          logger.debug("Expected bloom filter size : " + expectedBloomFilterSize);


        SSTableWriter writer;
        CompactionIterator ci = new CompactionIterator(type, sstables, controller); // retain a handle so we can call close()
        Iterator<AbstractCompactedRow> nni = new FilterIterator(ci, PredicateUtils.notNullPredicate());
        Map<DecoratedKey, Long> cachedKeys = new HashMap<DecoratedKey, Long>();


        executor.beginCompaction(ci);
        try
        {
            if (!nni.hasNext())
            {
                // don't mark compacted in the finally block, since if there _is_ nondeleted data,
                // we need to sync it (via closeAndOpen) first, so there is no period during which
                // a crash could cause data loss.
                cfs.markCompacted(sstables);
                return 0;
            }


            writer = cfs.createCompactionWriter(expectedBloomFilterSize, compactionFileLocation, sstables);
            while (nni.hasNext())
            {
                AbstractCompactedRow row = nni.next();
                if (row.isEmpty())
                    continue;


                long position = writer.append(row);
                totalkeysWritten++;

View Full Code Here


        CompactionIterator ci = new ValidationCompactionIterator(cfs, validator.request.range);
        validationExecutor.beginCompaction(ci);
        try
        {
            Iterator<AbstractCompactedRow> nni = new FilterIterator(ci, PredicateUtils.notNullPredicate());


            // validate the CF as we iterate over it
            validator.prepare(cfs);
            while (nni.hasNext())
            {
                AbstractCompactedRow row = nni.next();
                validator.add(row);
            }
            validator.complete();
        }
        finally

View Full Code Here

            displayExpireSet();
        }


        // Clean up expired continuations
        int count = 0;
        FilterIterator expirationIterator = new FilterIterator();
        Predicate expirationPredicate = new ExpirationPredicate();
        expirationIterator.setPredicate(expirationPredicate);
        synchronized (this.expirations) {
            expirationIterator.setIterator(this.expirations.iterator());
            while (expirationIterator.hasNext()) {
                WebContinuation wk = (WebContinuation) expirationIterator.next();
                expirationIterator.remove();
                WebContinuationsHolder continuationsHolder;
                if (wk instanceof HolderAwareWebContinuation) {
                    continuationsHolder = ((HolderAwareWebContinuation) wk).getContinuationsHolder();
                } else {
                    continuationsHolder = this.continuationsHolder;

View Full Code Here

     * <code>db.user</code>, or <code>db.password</code>, but not the key
     * <code>dbdriver</code>.
     */
    public Iterator getKeys(final String prefix)
    {
        return new FilterIterator(getKeys(), new Predicate()
        {
            public boolean evaluate(Object obj)
            {
                String key = (String) obj;
                return key.startsWith(prefix + ".") || key.equals(prefix);

View Full Code Here

        private final IteratorChain _itr = new IteratorChain();
        private final int _type;


        public EntryIterator(int type) {
            _type = type;
            _itr.addIterator(new FilterIterator(getView(pinnedMap), this));
            _itr.addIterator(getView(cacheMap));
            _itr.addIterator(getView(softMap));
        }

View Full Code Here


    public Iterator iterator() {
        _iterated = true;


        IteratorChain chain = new IteratorChain();
        chain.addIterator(new FilterIterator(itr(), this));


        // note have to copy _ct.getAdded to prevent concurrent mod errors
        chain.addIterator(new ArrayList(_ct.getAdded()).iterator());
        return new Itr(chain);
    }

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        // have to copy the entry set of _map to prevent concurrent mod errors
        IteratorChain chain = new IteratorChain();
        if (_map != null)
            chain.addIterator(new ArrayList(_map.entrySet()).iterator());
        chain.addIterator(new FilterIterator(itr(), this));
        return new Itr(mode, chain);
    }

View Full Code Here

          logger.debug("Expected bloom filter size : " + expectedBloomFilterSize);


        SSTableWriter writer;
        CompactionController controller = new CompactionController(cfs, sstables, major, gcBefore, false);
        CompactionIterator ci = new CompactionIterator(type, sstables, controller); // retain a handle so we can call close()
        Iterator<AbstractCompactedRow> nni = new FilterIterator(ci, PredicateUtils.notNullPredicate());
        Map<DecoratedKey, Long> cachedKeys = new HashMap<DecoratedKey, Long>();


        executor.beginCompaction(ci);
        try
        {
            if (!nni.hasNext())
            {
                // don't mark compacted in the finally block, since if there _is_ nondeleted data,
                // we need to sync it (via closeAndOpen) first, so there is no period during which
                // a crash could cause data loss.
                cfs.markCompacted(sstables);
                return 0;
            }


            writer = cfs.createCompactionWriter(expectedBloomFilterSize, compactionFileLocation, sstables);
            while (nni.hasNext())
            {
                AbstractCompactedRow row = nni.next();
                long position = writer.append(row);
                totalkeysWritten++;


                if (DatabaseDescriptor.getPreheatKeyCache())
                {

View Full Code Here


        CompactionIterator ci = new ValidationCompactionIterator(cfs, validator.request.range);
        executor.beginCompaction(ci);
        try
        {
            Iterator<AbstractCompactedRow> nni = new FilterIterator(ci, PredicateUtils.notNullPredicate());


            // validate the CF as we iterate over it
            validator.prepare(cfs);
            while (nni.hasNext())
            {
                AbstractCompactedRow row = nni.next();
                validator.add(row);
            }
            validator.complete();
        }
        finally

View Full Code Here

    private Iterable<PropertyState> filterReferenceProperties(
            final Iterable<ItemState> itemStates) {
        return new Iterable<PropertyState>() {
            @SuppressWarnings("unchecked")
            public Iterator<PropertyState> iterator() {
                return (Iterator<PropertyState>) new FilterIterator(
                        itemStates.iterator(), new Predicate() {
                    public boolean evaluate(Object object) {
                        ItemState state = (ItemState) object;
                        if (!state.isNode()) {
                            PropertyState prop = (PropertyState) state;

View Full Code Here

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