Groovy if-else处理及FileMaker中skipfolders分支逻辑失效问题

Let's break down why your skipfolders condition isn't working, plus cover the correct way to handle if-else in Groovy.

First: Common Reasons Your Condition Isn't Triggering #

The most likely culprits here are:

• Incorrect variable type: If skipfolders is being passed as a string (like "true"/"false") instead of a boolean, your condition checks won't behave as expected.
• Traversal logic is outside the conditional block: You might be running the full recursive file scan regardless of the skipfolders value, with the condition only affecting a non-critical part of the code.
• Typos or case sensitivity: Groovy is case-sensitive—make sure the variable name is exactly skipfolders (no mismatches like skipFolders).

Correct Groovy if-else Syntax #

Groovy's if-else follows standard logical flow, with some syntactic sugar for readability. Here's the core structure:

def skipfolders = true // Or false, or passed in from FileMaker

if (skipfolders) {
    // Logic for skipping subfolders (parent directory only)
} else {
    // Logic for including all subfolders (recursive scan)
}

If your skipfolders value comes from FileMaker as a string (super common!), convert it to a proper boolean first:

// Assume this pulls the value from FileMaker, which returns "true" or "false"
def skipfoldersStr = getSkipFoldersValue()
def skipfolders = skipfoldersStr.toBoolean() // Converts string to boolean

if (skipfolders) {
    // Parent-only scan
} else {
    // Recursive scan
}

Fixing Your FTP File Listing Logic #

Assuming you're using a library like Apache Commons Net for FTP interactions, here's a corrected example that respects the skipfolders flag:

import org.apache.commons.net.ftp.FTPClient
import org.apache.commons.net.ftp.FTPFile

def ftpClient = new FTPClient()
ftpClient.connect("your-ftp-host", 21)
ftpClient.login("your-username", "your-password")

def skipfolders = false // Replace with your variable from FileMaker
def targetDir = "/" // Your root parent directory

// Helper method to list files, respecting skipfolders
def listFiles = { dir ->
    FTPFile[] ftpItems = ftpClient.listFiles(dir)
    def filePaths = []
    
    for (FTPItem in ftpItems) {
        if (FTPItem.isFile()) {
            filePaths.add("${dir}/${FTPItem.getName()}")
        } 
        // Only recurse into subfolders if skipfolders is false
        else if (!skipfolders && FTPItem.isDirectory()) {
            filePaths.addAll(listFiles("${dir}/${FTPItem.getName()}"))
        }
    }
    return filePaths
}

// Execute the listing
def allFiles = listFiles(targetDir)
allFiles.each { println it }

// Clean up FTP connection
ftpClient.logout()
ftpClient.disconnect()

Key fixes here:

• The recursive call to scan subfolders is wrapped in a conditional that explicitly checks !skipfolders—so it only runs when you want to include subdirectories.
• Files are added to the list unconditionally, while directory traversal is gated by the skipfolders flag.

Quick Validation Checks #

1. Check variable type: Add a debug line like println "skipfolders type: ${skipfolders.getClass().name}, value: ${skipfolders}" to confirm if it's a boolean or string.
2. Test hardcoded values: Temporarily set skipfolders = true directly in your code—if it works, the issue is how FileMaker is passing the variable.
3. Inspect recursion triggers: Make sure your directory traversal code isn't running outside the if-else block.

内容的提问来源于stack exchange，提问作者Nagendra