Package org.xtreemfs.babudb.index.reader

Examples of org.xtreemfs.babudb.index.reader.DiskIndex.rangeLookup()

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        DiskIndex index = indexMap.get(indexId);
        if (index == null)
            throw new BabuDBException(ErrorCode.NO_SUCH_INDEX, "index " + indexId + " does not exist");
       
        byte[][] range = index.getComparator().prefixToRange(key, true);
        return index.rangeLookup(range[0], range[1], ascending);
    }
   
    @Override
    public ResultSet<byte[], byte[]> directRangeLookup(int indexId, byte[] from, byte[] to, boolean ascending) throws BabuDBException {
       
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        DiskIndex index = indexMap.get(indexId);
        if (index == null)
            throw new BabuDBException(ErrorCode.NO_SUCH_INDEX, "index " + indexId + " does not exist");
       
        return index.rangeLookup(from, to, ascending);
    }
   
    @Override
    public void shutdown() throws BabuDBException {
        try {
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        // read the disk index
        DiskIndex diskIndex = new DiskIndex(PATH2, DefaultByteRangeComparator.getInstance(), COMPRESSED,
            MMAPED);
       
        // create an iterator w/ matching start and end buffers
        Iterator<Entry<byte[], byte[]>> it = diskIndex.rangeLookup("brabbel".getBytes(), "yagga".getBytes(),
            true);
        assertIterator(it, keys, vals, 1, 4);
       
        // create an iterator with matching start buffer
        it = diskIndex.rangeLookup("brabbel".getBytes(), "g".getBytes(), true);
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        Iterator<Entry<byte[], byte[]>> it = diskIndex.rangeLookup("brabbel".getBytes(), "yagga".getBytes(),
            true);
        assertIterator(it, keys, vals, 1, 4);
       
        // create an iterator with matching start buffer
        it = diskIndex.rangeLookup("brabbel".getBytes(), "g".getBytes(), true);
        assertIterator(it, keys, vals, 1, 2);
       
        // create an iterator with matching end buffer
        it = diskIndex.rangeLookup("b".getBytes(), "brabbel".getBytes(), true);
        assertIterator(it, keys, vals, 0, 0);
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        // create an iterator with matching start buffer
        it = diskIndex.rangeLookup("brabbel".getBytes(), "g".getBytes(), true);
        assertIterator(it, keys, vals, 1, 2);
       
        // create an iterator with matching end buffer
        it = diskIndex.rangeLookup("b".getBytes(), "brabbel".getBytes(), true);
        assertIterator(it, keys, vals, 0, 0);
       
        // create an iterator w/o matching start and end buffers
        it = diskIndex.rangeLookup("blu".getBytes(), "yyz".getBytes(), true);
        assertIterator(it, keys, vals, 1, 6);
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        // create an iterator with matching end buffer
        it = diskIndex.rangeLookup("b".getBytes(), "brabbel".getBytes(), true);
        assertIterator(it, keys, vals, 0, 0);
       
        // create an iterator w/o matching start and end buffers
        it = diskIndex.rangeLookup("blu".getBytes(), "yyz".getBytes(), true);
        assertIterator(it, keys, vals, 1, 6);
       
        // check ranges outside the boundaries; should be empty
        it = diskIndex.rangeLookup("A".getBytes(), "Z".getBytes(), true);
        assertFalse(it.hasNext());
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        // create an iterator w/o matching start and end buffers
        it = diskIndex.rangeLookup("blu".getBytes(), "yyz".getBytes(), true);
        assertIterator(it, keys, vals, 1, 6);
       
        // check ranges outside the boundaries; should be empty
        it = diskIndex.rangeLookup("A".getBytes(), "Z".getBytes(), true);
        assertFalse(it.hasNext());
       
        it = diskIndex.rangeLookup("1".getBytes(), "2".getBytes(), true);
        assertFalse(it.hasNext());
       
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        // check ranges outside the boundaries; should be empty
        it = diskIndex.rangeLookup("A".getBytes(), "Z".getBytes(), true);
        assertFalse(it.hasNext());
       
        it = diskIndex.rangeLookup("1".getBytes(), "2".getBytes(), true);
        assertFalse(it.hasNext());
       
        diskIndex.destroy();
       
        // create a disk index from an empty index file
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        index.writeIndex(EMPTY_RESULT_SET);
       
        diskIndex = new DiskIndex(PATH1, new DefaultByteRangeComparator(), COMPRESSED, MMAPED);
       
        // check ranges; should all be empty
        it = diskIndex.rangeLookup(new byte[0], new byte[0], true);
        assertFalse(it.hasNext());
       
        it = diskIndex.rangeLookup(null, null, true);
        assertFalse(it.hasNext());
       
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        // check ranges; should all be empty
        it = diskIndex.rangeLookup(new byte[0], new byte[0], true);
        assertFalse(it.hasNext());
       
        it = diskIndex.rangeLookup(null, null, true);
        assertFalse(it.hasNext());
       
        it = diskIndex.rangeLookup("b".getBytes(), null, true);
        assertFalse(it.hasNext());
       
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