Examples with VirtualColumn io.druid.segment.VirtualColumn used on opensource projects

Example 1 with VirtualColumn

use of io.druid.segment.VirtualColumn in project druid by druid-io.

the class VirtualColumnsTest method testSerde.

@Test
public void testSerde() throws Exception {
    final ObjectMapper mapper = new DefaultObjectMapper();
    final ImmutableList<VirtualColumn> theColumns = ImmutableList.<VirtualColumn>of(new ExpressionVirtualColumn("expr", "x + y"), new ExpressionVirtualColumn("expr2", "x + z"));
    final VirtualColumns virtualColumns = VirtualColumns.create(theColumns);
    Assert.assertEquals(virtualColumns, mapper.readValue(mapper.writeValueAsString(virtualColumns), VirtualColumns.class));
    Assert.assertEquals(theColumns, mapper.readValue(mapper.writeValueAsString(virtualColumns), mapper.getTypeFactory().constructParametricType(List.class, VirtualColumn.class)));
}