Apache Commons IO - OrFileFilter Class

Overview

OrFileFilter class provides conditional OR logic across a list of file filters. It returns true, if any filters in the list return true. Otherwise, it returns false.

Class Declaration

Following is the declaration for org.apache.commons.io.filefilter.OrFileFilter Class −

public class OrFileFilter 
   extends AbstractFileFilter implements ConditionalFileFilter, Serializable

Here is the input file we need to parse −

input.txt

Welcome to TutorialsPoint. Simply Easy Learning.

Example - Filtering files starting with . Or ending with t.

CommonsIoTester.java

package com.tutorialspoint;

import java.io.File;

import org.apache.commons.io.filefilter.OrFileFilter;
import org.apache.commons.io.filefilter.PrefixFileFilter;
import org.apache.commons.io.filefilter.WildcardFileFilter;

public class CommonsIoTester {
   public static void main(String[] args) {
      //get the current directory
      File currentDirectory = new File(".");
      PrefixFileFilter prefixFilter = new PrefixFileFilter(".");
      WildcardFileFilter wildCardfilter = WildcardFileFilter.builder().setWildcards("*t").get();
      OrFileFilter andFileFilter = new OrFileFilter(prefixFilter, wildCardfilter);

      String[] filesNames = currentDirectory.list( orFileFilter );
      for( int i = 0; i < filesNames.length; i++ ) {
         System.out.println(filesNames[i]);
      }
   }
}

Output

It will print the following result −

.classpath
.project
.settings
input.txt
output.txt

Example - Filtering files ending with txt Or starting with i.

CommonsIoTester.java

package com.tutorialspoint;

import java.io.File;

import org.apache.commons.io.filefilter.OrFileFilter;
import org.apache.commons.io.filefilter.SuffixFileFilter;
import org.apache.commons.io.filefilter.WildcardFileFilter;

public class CommonsIoTester {
   public static void main(String[] args) {
      //get the current directory
      File currentDirectory = new File(".");
      SuffixFileFilter suffixFilter = new SuffixFileFilter("txt");
      WildcardFileFilter wildCardfilter = WildcardFileFilter.builder().setWildcards("i*").get();
      OrFileFilter orFileFilter = new OrFileFilter(suffixFilter, wildCardfilter);

      String[] filesNames = currentDirectory.list( orFileFilter );
      for( int i = 0; i < filesNames.length; i++ ) {
         System.out.println(filesNames[i]);
      }
   }
}

Output

It will print the following result −

input.txt
output.txt