Examples with DataCellToJavaConverter org.knime.core.data.convert.java.DataCellToJavaConverter used on opensource projects

Example 6 with DataCellToJavaConverter

use of org.knime.core.data.convert.java.DataCellToJavaConverter in project knime-core by knime.

the class DefaultKnimeToExternalMapper method map.

@Override
public void map(final DataRow row, final D destination, @SuppressWarnings("unchecked") final P... parameters) throws MappingException {
    requireNonNull(row, "row");
    requireNonNull(destination, "destination");
    if (requireNonNull(parameters, "parameters").length != m_cellCount) {
        throw new IllegalArgumentException("The number of consumer parameters is not equal to the number of cells (" + m_cellCount + "): " + parameters.length);
    }
    try {
        final ListIterator<Pair<DataCellToJavaConverter<?, ?>, CellValueConsumer<D, Object, P>>> // Forced line break.
        converterConsumerPairIterator = m_converterConsumerPairs.listIterator();
        for (final DataCell cell : row) {
            final Pair<DataCellToJavaConverter<?, ?>, CellValueConsumer<D, Object, P>> converterConsumerPair = converterConsumerPairIterator.next();
            converterConsumerPair.getSecond().consumeCellValue(destination, cell.isMissing() ? null : converterConsumerPair.getFirst().convertUnsafe(cell), parameters[converterConsumerPairIterator.previousIndex()]);
        }
    } catch (final Exception exception) {
        // always unwrap the exception and return a new MappingException with the cause message
        final Throwable cause = exception.getCause();
        final String message;
        if (cause != null) {
            message = cause.getMessage();
        } else {
            message = "Data type mapping exception";
        }
        throw new MappingException(message, cause);
    }
}