File Exists

Description

File Exists checks whether a file or folder exists on the file system using a path provided by a previous step. Use this step when your workflow needs to verify that an expected file is present before attempting to read or process it — for example, confirming a data feed has arrived or checking that an output directory exists. The step adds a Boolean result field to the data stream that you can use to branch the workflow with a Filter Rows step.

Configurations

Field Name	Description
Step name	Specify the name of the step as it appears in the workflow workspace. This name has to be unique in a single workflow.
Filename field (RegExp)	Specify the input field that will contain the filename at runtime Note: The field supports regular expressions for the last segment (node) of the file path. For example, C:\\Users\\Documents\\Project\\files\\file_*.txt, the regular expression will only apply to the file_*.txt segment. Wild Cards Example: 1. * : Matches zero or more characters in the last segment. Path: C:\Users\Documents\Project\files\file_*.txt Explanation: To match any file in the folder, that starts with file_ and has a .txt extension. 2. ? : Matches exactly one character in the last segment. Path: C:\Users\Documents\Project\files\file_?.txt Explanation: To match any file in the folder where file_ is followed by exactly one character and ends with .txt, such as file_a.txt, file_1.txt 3. [abc] : Matches any one of the specified characters in the brackets. Path: C:\Users\Documents\Project\files\file_[abc].txt Explanation: To match any file in the folder where file_ is followed by a, b, or c and ends with .txt, such as file_a.txt,or file_b.txt, or file_c.txt
Result fieldname	Specify the name of the field that will contain the boolean flag.
Add filename to result	Enable checkbox if you want to add the filename to the list of filenames that can be used in the next process entry.
Include file type	Enable checkbox to specify the file type in a field.
File type field	Specify the name of the field that will contain the file type as a String: "file", "folder", "imaginary"