# SpEL Function
This module provides a SpEL function that can be reused and composed in other applications.
The function can be used to apply SpEL transformations on data based on a SpEL expression.
## Beans for injection
You can import the `SpelFunctionConfiguration` in a Spring Boot application and then inject the following bean.
`spelFunction`
You can use `spelFunction` as a qualifier when injecting.
Once injected, you can use the `apply` method of the `Function` to invoke it and get the result.
## Configuration Options
All configuration properties are prefixed with `spel`.
For more information on the various options available, please see link:src/main/java/org/springframework/cloud/fn/spel/SpelFunctionProperties.java[SpelFunctionProperties.java]
## Tests
See this link:src/test/java/org/springframework/cloud/fn/spel/SpelFunctionApplicationTests.java[test suite] for examples of how this function is used.
## Other usage
See this link:../../../applications/processor/transform-processor/README.adoc[README] where this function is used to create a Spring Cloud Stream transformer application.
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