# Switch / Case
##  Switch / Case
### Description
The Switch Case transform implements the [Switch/Case statement](https://en.wikipedia.org/wiki/Switch_statement) found in popular programming languages like Java.
In our case we route rows of data to one or more target transforms based on the value encountered in a certain field.
| Hop Engine | ✓ |
| ---------- | ------------ |
| Spark | ? |
| Flink | ? |
| Dataflow | ? |
### Options
| Option | Description |
| ------------------------------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Transform name | The name that uniquely identifies the transform. |
| Field name to switch | The field name that contains the value to use as a bases for the row routing. |
| Use string contains comparison | If checked, the comparison will be true if the value is found anywhere in the field being tested. Unchecked and the value has to exactly match the field. |
| Case value data type | The data type of the values specified in this dialog |
| Case value conversion mask | The conversion mask of the values specified in this dialog (numeric / date values) |
| Case value decimal symbol | The decimal symbol of the values specified in this dialog (numeric values) |
| Case value grouping symbol | The grouping symbol of the values specified in this dialog (numeric values) |
| Case values | Here you can specify a value-target transform pair, one per row. To specify a null value, simply leave the value column blank while entering a target transform. Please note that it is possible to specify the same target transform more than once. |
| Default target transform | All the rows that don’t match any of the case values above are sent to this target transform. |
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