# Filter Function This module provides a filter function that can be reused and composed in other applications. ## Beans for injection You can import the `FilterFunctionConfiguration` in a Spring Boot application and then inject the following bean. `filterFunction` You can use `filterFunction` 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 `filter.function`. For more information on the various options available, please see link:src/main/java/org/springframework/cloud/fn/filter/FilterFunctionProperties.java[FilterFunctionProperties.java] ## Examples See this link:src/test/java/org/springframework/cloud/fn/filter/FilterFunctionApplicationTests.java[test suite] for examples of how this function is used. ## Other usage See this link:../../../applications/processor/filter-processor/README.adoc[README] where this function is used to create a Spring Cloud Stream application.