abstracting the filters

src/main/java/com/search/lucene/file/filters/CSVFileFilter.java

 package com.search.lucene.file.filters;
 
+import com.search.lucene.file.filters.abstractions.IFileFilter;
+
 import java.io.File;
-import java.io.FileFilter;
 
-public class CSVFileFilter implements FileFilter {
+public class CSVFileFilter implements IFileFilter {
     @Override
     public boolean accept(File pathname) {
         return pathname.getName().toLowerCase().endsWith(".csv");

src/main/java/com/search/lucene/file/filters/PDFFileFilter.java

 package com.search.lucene.file.filters;
 
+import com.search.lucene.file.filters.abstractions.IFileFilter;
+
 import java.io.File;
-import java.io.FileFilter;
 
-public class PDFFileFilter implements FileFilter {
+public class PDFFileFilter implements IFileFilter {
 
     @Override
     public boolean accept(File pathname) {

src/main/java/com/search/lucene/file/filters/TextFileFilter.java

 package com.search.lucene.file.filters;
 
+import com.search.lucene.file.filters.abstractions.IFileFilter;
+
 import java.io.File;
-import java.io.FileFilter;
 
-public class TextFileFilter implements FileFilter {
+public class TextFileFilter implements IFileFilter {
 
     @Override
     public boolean accept(File pathname) {

src/main/java/com/search/lucene/file/filters/abstractions/IFileFilter.java

+package com.search.lucene.file.filters.abstractions;
+
+import java.io.File;
+import java.io.FileFilter;
+
+public interface IFileFilter extends FileFilter{
+    @Override
+    boolean accept(File pathname);
+}

src/main/java/com/search/lucene/settings/LuceneConstants.java → src/main/java/com/search/lucene/settings/Constants.java

@@ -7,7 +7,7 @@ public class LuceneConstants {
     public static final String FILE_PATH = "filepath";
     public static final String COLUMN = "column";
     public static final String VALUE = "value";
-    public static final String LINE = "line";
+    public static final String ROW = "row";
     public static final int MAX_SEARCH = 10;
 }