Configures an inbound Channel Adapter that polls a directory and sends Messages whose payloads are instances of java.io.File. Specify whether to automatically create the source directory if it does not yet exist when this adapter is being initialized. The default value is 'true'. If set to 'false' and the directory does not exist upon initialization, an Exception will be thrown. Configures an outbound Channel Adapter that writes Message payloads to a File. Configures an outbound Gateway that writes request Message payloads to a File and then generates a reply Message containing the newly written File as its payload. Specify whether to automatically create the destination directory if it does not yet exist when this adapter is being initialized. The default value is 'true'. If set to 'false' and the directory does not exist upon initialization, an Exception will be thrown. Creates a Transformer that converts a File payload to a String. Creates a Transformer that converts a File payload to an array of bytes.