CODEWITHSUNDEEP
java
Vaibhav
Vaibhav

Reputation: 3245

Need help in WildcardFileFilter in java

I have to separate out those files from a folder which matches one of the given pattern. I have an array of strings which contains these patterns.
And I am passing this array as argument into WildCardFilter so that I can separate out thse files which matches the given pattern in the array. My code is given below.

String pat1="DailyExistingBusinessReport_*";
String pat2="*DailyNewExistingBusinessReport_.csv";
String pat3="*_EOD_PNL_Explained.*";
String pat4="ABC*XYZ.csv";
String str[]=new String[]{pat1,pat2,pat3,pat4};
FileFilter fileFilter = new WildcardFileFilter(str);
File dir = new File("\\C:\\Users\\ABC\\Desktop\\Myfiles");
File[] files = dir.listFiles(fileFilter);

for(File f :files){
    System.out.println(f);
}

This prints out the name of files which matches the patterns given in array. But now my requirement is that alongwith each file name, I want the exact name of pattern to which this file matched. Any idea what code should I add further to get pattern name alongwith file name.

Upvotes: 1

Views: 2593

Answers (1)

NeplatnyUdaj
NeplatnyUdaj

Reputation: 6242

I've checked the API and don't see the way to do that with the FileFilter. I suggest creating a list of filters and apply them one by one:

List<FileFilter> filters = new ArrayList<FileFilter>();
filters.add(new WildCardFileFilter("DailyExistingBusinessReport_*");
filters.add(new WildCardFileFilter("*DailyNewExistingBusinessReport_.csv");
filters.add(new WildCardFileFilter("*_EOD_PNL_Explained.*");
filters.add(new WildCardFileFilter("ABC*XYZ.csv");

File dir = new File("\\C:\\Users\\ABC\\Desktop\\Myfiles");
Map<FileFilter, List<File>> filemap = new HashMap<FileFilter, List<File>>();

for (File file: dir.listFiles()){
    for(FileFilter filter: filters){
         if(filter.accept(file)){
             if(!filemap.containsKey(filter)){
                 filemap.put(filter, new ArrayList<File>());
             }
             filemap.get(filter).add(file);
         }
    }
}

After that, you should have a map which contain filters and lists of files for which the filter apply. I don't have IDE by hand, so there may be some small mistakes.

Upvotes: 2

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