| <!-- |
| Licensed under the Apache License, Version 2.0 (the "License"); |
| you may not use this file except in compliance with the License. |
| You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| --> |
| ### Converting between types |
| |
| As mentioned, Beam can automatically convert between different Java types, as long as those types have equivalent schemas. One way to do this is by using the ```Convert``` transform, as follows. |
| |
| ``` |
| PCollection<Object> input = pipeline.apply(Create.of(user1)); |
| |
| // Object convert to Row |
| PCollection<Row> convertedToRow = input.apply(Convert.toRows()); |
| ``` |
| |
| ### Playground exercise |
| |
| In the playground window you can find examples of using the `Convert`. By running this example, you will see user statistics in certain games. |
| You can add schema with one function: |
| |
| ``` |
| PCollection<Row> userRow = fullStatistics |
| .apply(Convert.toRows()) |
| .setRowSchema(type) |
| .apply("User", ParDo.of(new LogOutput<>("ToRows"))); |
| ``` |
