Examples with FlattenedUnreadDataSingleRow org.locationtech.geowave.core.store.flatten.FlattenedUnreadDataSingleRow used on opensource projects

Example 1 with FlattenedUnreadDataSingleRow

use of org.locationtech.geowave.core.store.flatten.FlattenedUnreadDataSingleRow in project geowave by locationtech.

the class DataStoreUtils method decomposeFlattenedFields.

/**
 * Takes a byte array representing a serialized composite group of FieldInfos sharing a common
 * visibility and returns a List of the individual FieldInfos
 *
 * @param bitmask the composite bitmask representing the fields contained within the
 *        flattenedValue
 * @param flattenedValue the serialized composite FieldInfo
 * @param commonVisibility the shared visibility
 * @param maxFieldPosition can short-circuit read and defer decomposition of fields after a given
 *        position
 * @return the dataset that has been read
 */
public static <T> FlattenedDataSet decomposeFlattenedFields(final byte[] bitmask, final byte[] flattenedValue, final byte[] commonVisibility, final int maxFieldPosition) {
    final List<FlattenedFieldInfo> fieldInfoList = new LinkedList<>();
    if ((flattenedValue != null) && (flattenedValue.length > 0)) {
        if ((bitmask != null) && (bitmask.length > 0)) {
            final List<Integer> fieldPositions = BitmaskUtils.getFieldPositions(bitmask);
            final boolean sharedVisibility = fieldPositions.size() > 1;
            if (sharedVisibility) {
                final ByteBuffer input = ByteBuffer.wrap(flattenedValue);
                for (int i = 0; i < fieldPositions.size(); i++) {
                    final Integer fieldPosition = fieldPositions.get(i);
                    if ((maxFieldPosition > -2) && (fieldPosition > maxFieldPosition)) {
                        return new FlattenedDataSet(fieldInfoList, new FlattenedUnreadDataSingleRow(input, i, fieldPositions));
                    }
                    final int fieldLength = VarintUtils.readUnsignedInt(input);
                    final byte[] fieldValueBytes = ByteArrayUtils.safeRead(input, fieldLength);
                    fieldInfoList.add(new FlattenedFieldInfo(fieldPosition, fieldValueBytes));
                }
            } else {
                fieldInfoList.add(new FlattenedFieldInfo(fieldPositions.get(0), flattenedValue));
            }
        } else {
            // assume fields are in positional order
            final ByteBuffer input = ByteBuffer.wrap(flattenedValue);
            for (int i = 0; input.hasRemaining(); i++) {
                final Integer fieldPosition = i;
                final int fieldLength = VarintUtils.readUnsignedInt(input);
                final byte[] fieldValueBytes = ByteArrayUtils.safeRead(input, fieldLength);
                fieldInfoList.add(new FlattenedFieldInfo(fieldPosition, fieldValueBytes));
            }
        }
    }
    return new FlattenedDataSet(fieldInfoList, null);
}