Package org.apache.commons.collections.iterators

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

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                public boolean evaluate(Object row)
                {
                    return Range.isTokenInRanges(((IteratingRow)row).getKey().token, ranges);
                }
            };
            CollatingIterator iter = FBUtilities.<IteratingRow>getCollatingIterator();
            for (SSTableReader sstable : sstables)
            {
                SSTableScanner scanner = sstable.getScanner(FILE_BUFFER_SIZE);
                iter.addIterator(new FilterIterator(scanner, rangesPredicate));
            }
            return iter;
        }
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    }

    public static <T extends Comparable<T>> CollatingIterator getCollatingIterator()
    {
        // CollatingIterator will happily NPE if you do not specify a comparator explicitly
        return new CollatingIterator(new Comparator<T>()
        {
            public int compare(T o1, T o2)
            {
                return o1.compareTo(o2);
            }
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    }

    @SuppressWarnings("unchecked")
    protected static CollatingIterator getCollatingIterator(Iterable<SSTableReader> sstables) throws IOException
    {
        CollatingIterator iter = FBUtilities.<IteratingRow>getCollatingIterator();
        for (SSTableReader sstable : sstables)
        {
            iter.addIterator(sstable.getScanner(FILE_BUFFER_SIZE));
        }
        return iter;
    }
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        this.table = table;
    }

    public List<Row> resolve(Collection<Message> responses) throws DigestMismatchException, IOException
    {
        CollatingIterator collator = new CollatingIterator(new Comparator<Pair<Row,InetAddress>>()
        {
            public int compare(Pair<Row,InetAddress> o1, Pair<Row,InetAddress> o2)
            {
                return o1.left.key.compareTo(o2.left.key);
            }
        });
       
        int n = 0;
        for (Message response : responses)
        {
            RangeSliceReply reply = RangeSliceReply.read(response.getMessageBody());
            n = Math.max(n, reply.rows.size());
            collator.addIterator(new RowIterator(reply.rows.iterator(), response.getFrom()));
        }

        // for each row, compute the combination of all different versions seen, and repair incomplete versions
        ReducingIterator<Pair<Row,InetAddress>, Row> iter = new ReducingIterator<Pair<Row,InetAddress>, Row>(collator)
        {
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    // Note: this deserializes the response a 2nd time if getData was called first
    // (this is not currently an issue since we don't do read repair for range queries.)
    public Iterable<Row> resolve() throws IOException
    {
        CollatingIterator collator = new CollatingIterator(new Comparator<Pair<Row,InetAddress>>()
        {
            public int compare(Pair<Row,InetAddress> o1, Pair<Row,InetAddress> o2)
            {
                return o1.left.key.compareTo(o2.left.key);
            }
        });
       
        int n = 0;
        for (Message response : responses)
        {
            RangeSliceReply reply = RangeSliceReply.read(response.getMessageBody());
            n = Math.max(n, reply.rows.size());
            collator.addIterator(new RowIterator(reply.rows.iterator(), response.getFrom()));
        }

        // for each row, compute the combination of all different versions seen, and repair incomplete versions

        return new ReducingIterator<Pair<Row,InetAddress>, Row>(collator)
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                public boolean evaluate(Object row)
                {
                    return Range.isTokenInRanges(((IteratingRow)row).getKey().token, ranges);
                }
            };
            CollatingIterator iter = FBUtilities.<IteratingRow>getCollatingIterator();
            for (SSTableReader sstable : sstables)
            {
                SSTableScanner scanner = sstable.getScanner(FILE_BUFFER_SIZE);
                iter.addIterator(new FilterIterator(scanner, rangesPredicate));
            }
            return iter;
        }
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    }

    @SuppressWarnings("unchecked")
    protected static CollatingIterator getCollatingIterator(Iterable<SSTableReader> sstables) throws IOException
    {
        CollatingIterator iter = FBUtilities.<IteratingRow>getCollatingIterator();
        for (SSTableReader sstable : sstables)
        {
            iter.addIterator(sstable.getScanner(FILE_BUFFER_SIZE));
        }
        return iter;
    }
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    }

    public static <T extends Comparable<T>> CollatingIterator getCollatingIterator()
    {
        // CollatingIterator will happily NPE if you do not specify a comparator explicitly
        return new CollatingIterator(new Comparator<T>()
        {
            public int compare(T o1, T o2)
            {
                return o1.compareTo(o2);
            }
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     * @param iterator2  the first iterators to use, not null
     * @return a combination iterator over the iterators
     * @throws NullPointerException if either iterator is null
     */
    public static Iterator collatedIterator(Comparator comparator, Iterator iterator1, Iterator iterator2) {
        return new CollatingIterator(comparator, iterator1, iterator2);
    }
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     * @param iterators  the iterators to use, not null or empty or contain nulls
     * @return a combination iterator over the iterators
     * @throws NullPointerException if iterators array is null or contains a null
     */
    public static Iterator collatedIterator(Comparator comparator, Iterator[] iterators) {
        return new CollatingIterator(comparator, iterators);
    }
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Related Classes of org.apache.commons.collections.iterators.CollatingIterator

  • org.apache.cassandra.db.ColumnFamilyStore$AntiCompactionIterator
  • org.apache.cassandra.db.compaction.CompactionIterator
  • org.apache.cassandra.db.compaction.CompactionManager$ValidationCompactionIterator
  • org.apache.cassandra.db.compaction.LazilyCompactedRow
  • org.apache.cassandra.db.CompactionManager$AntiCompactionIterator
  • org.apache.cassandra.db.CompactionManager$ValidationCompactionIterator
  • org.apache.cassandra.io.CompactionIterator
  • org.apache.cassandra.io.LazilyCompactedRow
  • org.apache.cassandra.service.RangeSliceResponseResolver
  • org.apache.cassandra.service.RowRepairResolver
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