Examples with OneColumnMapper org.apache.ignite.table.mapper.OneColumnMapper used on opensource projects

Example 1 with OneColumnMapper

use of org.apache.ignite.table.mapper.OneColumnMapper in project ignite-3 by apache.

the class Marshaller method simpleMarshaller.

/**
 * Creates a marshaller for class.
 *
 * @param cols   Columns.
 * @param mapper Mapper.
 * @return Marshaller.
 */
static <T> SimpleMarshaller simpleMarshaller(Column[] cols, @NotNull OneColumnMapper<T> mapper) {
    final Class<T> targetType = mapper.targetType();
    Column col = (mapper.mappedColumn() == null && cols.length == 1) ? cols[0] : Arrays.stream(cols).filter(c -> c.name().equals(mapper.mappedColumn())).findFirst().orElseThrow(() -> new SchemaMismatchException("Failed to map object to a single column:" + mapper.mappedColumn()));
    assert !targetType.isPrimitive() : "Non-nullable types are not allowed.";
    return new SimpleMarshaller(ColumnBinding.createIdentityBinding(col, targetType, mapper.converter()));
}