Examples of org.openrdf.sail.nativerdf.btree.BTree

      try {
        for (String fieldSeq : addedIndexSpecs) {
          logger.debug("Initializing new index '" + fieldSeq + "'...");


          TripleIndex addedIndex = new TripleIndex(fieldSeq);
          BTree addedBTree = addedIndex.getBTree();


          RecordIterator sourceIter = sourceIndex.getBTree().iterateAll();
          try {
            byte[] value = null;
            while ((value = sourceIter.next()) != null) {
              addedBTree.insert(value);
            }
          }
          finally {
            sourceIter.close();
          }


          addedBTree.close();
        }


        logger.debug("New index(es) initialized");
      }
      finally {


  protected double cardinality(int subj, int pred, int obj, int context)
    throws IOException
  {
    TripleIndex index = getBestIndex(subj, pred, obj, context);
    BTree btree = index.btree;


    double rangeSize;


    if (index.getPatternScore(subj, pred, obj, context) == 0) {
      rangeSize = btree.getValueCountEstimate();
    }
    else {
      byte[] minValue = getMinValue(subj, pred, obj, context);
      byte[] maxValue = getMaxValue(subj, pred, obj, context);
      rangeSize = btree.getValueCountEstimate(minValue, maxValue);
    }


    return rangeSize;
  }


      count = (int)removedTriplesCache.getRecordCount();
      updatedTriplesCache.storeRecords(removedTriplesCache);


      for (TripleIndex index : indexes) {
        BTree btree = index.getBTree();


        RecordIterator recIter = removedTriplesCache.getRecords();
        try {
          while ((data = recIter.next()) != null) {
            btree.insert(data);
          }
        }
        finally {
          recIter.close();
        }

        data = iter.next();
      }
      iter.close();


      for (TripleIndex index : indexes) {
        BTree btree = index.getBTree();


        RecordIterator recIter = recordCache.getRecords();
        try {
          while ((data = recIter.next()) != null) {
            btree.remove(data);
          }
        }
        finally {
          recIter.close();
        }

    }


    boolean validCache = updatedTriplesCache.isValid();


    for (TripleIndex index : indexes) {
      BTree btree = index.getBTree();


      RecordIterator iter;
      if (validCache) {
        // Use the cached set of updated triples
        iter = updatedTriplesCache.getRecords();
      }
      else {
        // Cache is invalid; too much updates(?). Iterate over all triples
        iter = btree.iterateAll();
      }


      try {
        byte[] data = null;
        while ((data = iter.next()) != null) {
          byte flags = data[FLAG_IDX];
          boolean added = (flags & ADDED_FLAG) != 0;
          boolean removed = (flags & REMOVED_FLAG) != 0;
          boolean toggled = (flags & TOGGLE_EXPLICIT_FLAG) != 0;


          if (removed) {
            // Record has been discarded earlier, do not put it back in!
            continue;
          }


          if (added || toggled) {
            if (toggled) {
              data[FLAG_IDX] ^= EXPLICIT_FLAG;
            }
            if (added) {
              data[FLAG_IDX] ^= ADDED_FLAG;
            }


            if (validCache) {
              // We're iterating the cache
              btree.insert(data);
            }
            else {
              // We're iterating the BTree itself
              iter.set(data);
            }

    boolean validCache = updatedTriplesCache.isValid();


    byte txnFlagsMask = ~(ADDED_FLAG | REMOVED_FLAG | TOGGLE_EXPLICIT_FLAG);


    for (TripleIndex index : indexes) {
      BTree btree = index.getBTree();


      RecordIterator iter;
      if (validCache) {
        // Use the cached set of updated triples
        iter = updatedTriplesCache.getRecords();
      }
      else {
        // Cache is invalid; too much updates(?). Iterate over all triples
        iter = btree.iterateAll();
      }


      try {
        byte[] data = null;
        while ((data = iter.next()) != null) {
          byte flags = data[FLAG_IDX];
          boolean removed = (flags & REMOVED_FLAG) != 0;
          boolean toggled = (flags & TOGGLE_EXPLICIT_FLAG) != 0;


          if (removed || toggled) {
            data[FLAG_IDX] &= txnFlagsMask;


            if (validCache) {
              // We're iterating the cache
              btree.insert(data);
            }
            else {
              // We're iterating the BTree itself
              iter.set(data);
            }


    public TripleIndex(String fieldSeq)
      throws IOException
    {
      tripleComparator = new TripleComparator(fieldSeq);
      btree = new BTree(dir, getFilenamePrefix(fieldSeq), 2048, RECORD_LENGTH, tripleComparator, forceSync);
    }


  public SortedRecordCache(File cacheDir, int recordSize, long maxRecords, RecordComparator comparator)
    throws IOException
  {
    super(maxRecords);
    btree = new BTree(cacheDir, "txncache", 4096, recordSize, comparator);
  }


  public SortedRecordCache(File cacheDir, int recordSize, long maxRecords, RecordComparator comparator)
    throws IOException
  {
    super(cacheDir, maxRecords);
    btree = new BTree(cacheFile, 4096, recordSize, comparator);
  }

      try {
        for (String fieldSeq : addedIndexSpecs) {
          logger.debug("Initializing new index '" + fieldSeq + "'...");


          TripleIndex addedIndex = new TripleIndex(fieldSeq);
          BTree addedBTree = addedIndex.getBTree();


          RecordIterator sourceIter = sourceIndex.getBTree().iterateAll();
          try {
            byte[] value = null;
            while ((value = sourceIter.next()) != null) {
              addedBTree.insert(value);
            }
          }
          finally {
            sourceIter.close();
          }


          addedBTree.close();
        }


        logger.debug("New index(es) initialized");
      }
      finally {

Examples of org.openrdf.sail.nativerdf.btree.BTree

Related Classes of org.openrdf.sail.nativerdf.btree.BTree