# 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.