Hey there! Let's work through this tMap string processing issue you're facing. The key problems here are handling multi-line content (line breaks), conflicting logic for quotes and spaces, and ensuring consistent results for cases like "Other vc_7days". Here's a step-by-step fix:

1. First: Remove All Line Breaks #

Multi-line cells are caused by \n (Unix), \r\n (Windows), or \r (old Mac) line breaks. Start by cleaning these out, plus trimming any extra whitespace at the start/end of the string:

// Clean line breaks and trim whitespace
String cleaned = row4.Ad_Set_Name.replaceAll("\\r?\\n|\\r", "").trim();

This regex covers all common line break formats, so you won't miss any hidden newlines.

2. Optimize Quote & Space Logic (Avoid Conflicts) #

Your original code has two separate checks that can conflict (e.g., a string with both quotes and spaces). Let's prioritize and combine the logic to ensure predictable results:

Option A: Use a Readable Nested Logic (for tMap Expression) #

If you want to write this directly in tMap's expression field, use this nested approach (we'll handle quotes first, then spaces):

// Full expression for tMap
(
    // Step 1: Clean line breaks and trim
    row4.Ad_Set_Name.replaceAll("\\r?\\n|\\r", "").trim().contains("\"") 
    ? 
        // Step 2: Handle quotes (only if paired)
        (row4.Ad_Set_Name.replaceAll("\\r?\\n|\\r", "").trim().indexOf("\"") != row4.Ad_Set_Name.replaceAll("\\r?\\n|\\r", "").trim().lastIndexOf("\"") 
        ? 
            row4.Ad_Set_Name.replaceAll("\\r?\\n|\\r", "").trim().substring(row4.Ad_Set_Name.replaceAll("\\r?\\n|\\r", "").trim().indexOf("\"")+1, row4.Ad_Set_Name.replaceAll("\\r?\\n|\\r", "").trim().lastIndexOf("\"")) 
        : 
            "null") 
    : 
        row4.Ad_Set_Name.replaceAll("\\r?\\n|\\r", "").trim()
).contains(" ") 
? 
    // Step 3: Extract text before first space (after quote handling)
    (
        row4.Ad_Set_Name.replaceAll("\\r?\\n|\\r", "").trim().contains("\"") 
        ? 
            (row4.Ad_Set_Name.replaceAll("\\r?\\n|\\r", "").trim().indexOf("\"") != row4.Ad_Set_Name.replaceAll("\\r?\\n|\\r", "").trim().lastIndexOf("\"") 
            ? 
                row4.Ad_Set_Name.replaceAll("\\r?\\n|\\r", "").trim().substring(row4.Ad_Set_Name.replaceAll("\\r?\\n|\\r", "").trim().indexOf("\"")+1, row4.Ad_Set_Name.replaceAll("\\r?\\n|\\r", "").trim().lastIndexOf("\"")) 
            : 
                "null") 
        : 
            row4.Ad_Set_Name.replaceAll("\\r?\\n|\\r", "").trim()
    ).substring(0, (
        row4.Ad_Set_Name.replaceAll("\\r?\\n|\\r", "").trim().contains("\"") 
        ? 
            (row4.Ad_Set_Name.replaceAll("\\r?\\n|\\r", "").trim().indexOf("\"") != row4.Ad_Set_Name.replaceAll("\\r?\\n|\\r", "").trim().lastIndexOf("\"") 
            ? 
                row4.Ad_Set_Name.replaceAll("\\r?\\n|\\r", "").trim().substring(row4.Ad_Set_Name.replaceAll("\\r?\\n|\\r", "").trim().indexOf("\"")+1, row4.Ad_Set_Name.replaceAll("\\r?\\n|\\r", "").trim().lastIndexOf("\"")) 
            : 
                "null") 
        : 
            row4.Ad_Set_Name.replaceAll("\\r?\\n|\\r", "").trim()
    ).indexOf(" ")) 
: 
    // Keep the cleaned string if no space exists
    (
        row4.Ad_Set_Name.replaceAll("\\r?\\n|\\r", "").trim().contains("\"") 
        ? 
            (row4.Ad_Set_Name.replaceAll("\\r?\\n|\\r", "").trim().indexOf("\"") != row4.Ad_Set_Name.replaceAll("\\r?\\n|\\r", "").trim().lastIndexOf("\"") 
            ? 
                row4.Ad_Set_Name.replaceAll("\\r?\\n|\\r", "").trim().substring(row4.Ad_Set_Name.replaceAll("\\r?\\n|\\r", "").trim().indexOf("\"")+1, row4.Ad_Set_Name.replaceAll("\\r?\\n|\\r", "").trim().lastIndexOf("\"")) 
            : 
                "null") 
        : 
            row4.Ad_Set_Name.replaceAll("\\r?\\n|\\r", "").trim()
    )

Option B: Use a Custom Java Method (Better Readability & Maintainability) #

For cleaner code (especially if you need to reuse this logic), create a custom utility class in Talend:

// Create this class in Talend's Code tab or as a separate Java file
public class AdSetNameProcessor {
    public static String process(String input) {
        // Handle null input upfront
        if (input == null) return "null";
        
        // Step 1: Remove line breaks and trim whitespace
        String temp = input.replaceAll("\\r?\\n|\\r", "").trim();
        
        // Step 2: Process paired quotes
        if (temp.contains("\"")) {
            int firstQuote = temp.indexOf("\"");
            int lastQuote = temp.lastIndexOf("\"");
            // Only extract content if quotes are paired
            if (firstQuote != lastQuote) {
                temp = temp.substring(firstQuote + 1, lastQuote);
            } else {
                return "null";
            }
        }
        
        // Step 3: Extract text before first space
        if (temp.contains(" ")) {
            temp = temp.substring(0, temp.indexOf(" "));
        }
        
        // Return "null" if the final string is empty
        return temp.isEmpty() ? "null" : temp;
    }
}

Then call this method directly in your tMap expression:

AdSetNameProcessor.process(row4.Ad_Set_Name)

3. Test with Your Example #

For input "Other vc_7days":

1. Line breaks are removed (none here), string becomes "Other vc_7days"
2. Paired quotes are detected, extract content inside: Other vc_7days
3. Space is detected, extract text before first space: Other

If you want to keep the full quoted content instead of trimming at the space, just remove the space-handling step from the logic!

内容的提问来源于stack exchange，提问作者Mara M