Examples with Converter org.apache.parquet.io.api.Converter used on opensource projects

Example 1 with Converter

use of org.apache.parquet.io.api.Converter in project parquet-mr by apache.

the class ColumnReadStoreImpl method getPrimitiveConverter.

private PrimitiveConverter getPrimitiveConverter(ColumnDescriptor path) {
    Type currentType = schema;
    Converter currentConverter = recordConverter;
    for (String fieldName : path.getPath()) {
        final GroupType groupType = currentType.asGroupType();
        int fieldIndex = groupType.getFieldIndex(fieldName);
        currentType = groupType.getType(fieldName);
        currentConverter = currentConverter.asGroupConverter().getConverter(fieldIndex);
    }
    PrimitiveConverter converter = currentConverter.asPrimitiveConverter();
    return converter;
}

Example 2 with Converter

use of org.apache.parquet.io.api.Converter in project parquet-mr by apache.

the class FilteringGroupConverter method getConverter.

// When a converter is asked for, we get the real one from the delegate, then wrap it
// in a filtering pass-through proxy.
// TODO: making the assumption that getConverter(i) is only called once, is that valid?
@Override
public Converter getConverter(int fieldIndex) {
    // get the real converter from the delegate
    Converter delegateConverter = checkNotNull(delegate.getConverter(fieldIndex), "delegate converter");
    // determine the indexFieldPath for the converter proxy we're about to make, which is
    // this converter's path + the requested fieldIndex
    List<Integer> newIndexFieldPath = new ArrayList<Integer>(indexFieldPath.size() + 1);
    newIndexFieldPath.addAll(indexFieldPath);
    newIndexFieldPath.add(fieldIndex);
    if (delegateConverter.isPrimitive()) {
        PrimitiveColumnIO columnIO = getColumnIO(newIndexFieldPath);
        ColumnPath columnPath = ColumnPath.get(columnIO.getColumnDescriptor().getPath());
        ValueInspector[] valueInspectors = getValueInspectors(columnPath);
        return new FilteringPrimitiveConverter(delegateConverter.asPrimitiveConverter(), valueInspectors);
    } else {
        return new FilteringGroupConverter(delegateConverter.asGroupConverter(), newIndexFieldPath, valueInspectorsByColumn, columnIOsByIndexFieldPath);
    }
}