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package io.robe.common.utils.file;
import io.robe.common.utils.Validations;
import java.io.File;
import java.util.ArrayList;
import java.util.List;
/**
* Contains some methods to list files and folders from a directory
*
* @author Loiane Groner
* http://loiane.com (Portuguese)
* http://loianegroner.com (English)
*/
public class ListFilesUtil {
public static final String allFilterRegex=".*";
/**
* List all the files and folders from a directory
* @param directoryName to be listed
*/
public static List listFilesAndFolders(String directoryName){
return listFilesAndFoldersByRegex(directoryName, allFilterRegex);
}
/**
* list folders and file by String pattern
* example pattern =*.json
* @param directoryName use for list in files and folder example : directoryName= /home/MyUser/Dekstop/myfiles/
* @param pattern use pattern for filenames example : *.json
* @return
*/
public static List listFilesAndFolders(String directoryName,String pattern){
String regexPatter=pattern==null?allFilterRegex:pattern.replace(".","\\.").replace("*",".*");
return listFilesAndFoldersByRegex(directoryName,pattern);
}
/**
* list folders and file by regex pattern
* example directoryName= /home/MyUser/Dekstop/myfiles/
* example pattern =*.json
*
* @param directoryName use for list in files and folder example : directoryName= /home/MyUser/Dekstop/myfiles/
* @param regexPattern use regexPattern for filenames example : /.*\\.json/
* @return
*/
public static List listFilesAndFoldersByRegex(String directoryName,String regexPattern){
File directory = new File(directoryName);
//get all the files from a directory
File[] fList = directory.listFiles();
List fileList=new ArrayList();
if(fList==null){
return fileList;
}
for(File file:fList){
if(file.getName().matches(regexPattern)){
fileList.add(file);
}
}
return fileList;
}
/**
* list folders and file by String pattern
* example directoryName= /home/MyUser/Dekstop/myfiles/
* pattern=*
* @param directoryName to be listed
*/
public static List listFiles(String directoryName){
return listFilesByRegex(directoryName,allFilterRegex);
}
/**
*
* @param directoryName
* @param pattern
* @return
*/
public static List listFiles(String directoryName,String pattern){
String regexPattern=pattern==null?allFilterRegex:pattern.replace(".","\\.").replace("*",".*");
return listFilesByRegex(directoryName,regexPattern);
}
/**
* list files by regex Pattern
* example directoryName= /home/MyUser/Dekstop/myfiles/
* example pattern =/.*.json/
*
* @param directoryName
* @param regexPattern
* @return
*/
public static List listFilesByRegex(String directoryName,String regexPattern){
File directory = new File(directoryName);
//get all the files from a directory
File[] fList = directory.listFiles();
List fileList=new ArrayList();
if(fList==null){
return fileList;
}
for (File file : fList){
if (file.isFile()&&file.getName().matches(regexPattern)){
fileList.add(file);
}
}
return fileList;
}
/**
* List all the folder under a directory
* @param directoryName to be listed
*/
public static List listFolders(String directoryName){
return listFoldersByRegex(directoryName, allFilterRegex);
}
/**
*
* @param directoryName
* @param pattern
* @return
*/
public static List listFolders(String directoryName,String pattern){
String regexPattern=pattern==null? allFilterRegex:pattern.replace(".","\\.").replace("*",".*");
return listFoldersByRegex(directoryName,regexPattern);
}
/**
*
* @param directoryName
* @param pattern
* @return
*/
public static List listFoldersByRegex(String directoryName,String pattern){
if(Validations.isEmptyOrNull(pattern)){
pattern= allFilterRegex;
}
File directory = new File(directoryName);
//get all the files from a directory
File[] fList = directory.listFiles();
List fileList=new ArrayList();
if(fList==null){
return fileList;
}
for (File file : fList){
if (file.isDirectory()&&file.getName().matches(pattern)){
fileList.add(file);
}
}
return fileList;
}
/**
* List all files from a directory and its subdirectories
* @param directoryName to be listed
*/
public static List listFilesAndFilesSubDirectories(String directoryName){
return getFilesAndFilesSubDirectories(directoryName,allFilterRegex);
}
/**
*
* @param directoryName
* @param pattern
* @return
*/
public static List listFilesAndFilesSubDirectories(String directoryName,String pattern){
String regexPattern=pattern==null? allFilterRegex:pattern.replace(".","\\.").replace("*",".*");
return getFilesAndFilesSubDirectories(directoryName,regexPattern);
}
/**
*
* @param directoryName
* @param regexPattern
* @return
*/
public static List listFilesAndFilesSubDirectoriesByRegex(String directoryName,String regexPattern){
if(Validations.isEmptyOrNull(regexPattern)){
regexPattern= allFilterRegex;
}
return getFilesAndFilesSubDirectories(directoryName,regexPattern);
}
/**
*
* @param directoryName
* @param regexPattern
* @return
*/
private static List getFilesAndFilesSubDirectories(String directoryName,String regexPattern){
File directory = new File(directoryName);
//get all the files from a directory
File[] fList = directory.listFiles();
List fileList=new ArrayList();
if(fList==null){
return fileList;
}
for (File file : fList){
if(!file.getName().matches(regexPattern)){
continue;
}
fileList.add(file);
if (file.isDirectory()){
getFilesAndFilesSubDirectories(file.getAbsolutePath(),regexPattern);
}
}
return fileList;
}
/**
* get All File and folder List
* @param directoryName
* @return
*/
public static List listFilesAndDirectoriesTree(String directoryName){
return getFilesAndDirectoriesTreeByRegex(directoryName, allFilterRegex);
}
/**
*
* @param directoryName
* @param pattern
* @return
*/
public static List listFilesAndDirectoriesTree(String directoryName,String pattern){
String regexPattern=pattern==null? allFilterRegex:pattern.replace(".","\\.").replace("*",".*");
return getFilesAndDirectoriesTreeByRegex(directoryName, regexPattern);
}
/**
*
* @param directoryName
* @param regexPattern
* @return
*/
public static List listFilesAndDirectoriesTreeByRegex(String directoryName,String regexPattern){
if(Validations.isEmptyOrNull(regexPattern)){
regexPattern= allFilterRegex;
}
return getFilesAndDirectoriesTreeByRegex(directoryName, regexPattern);
}
/**
*
* @param directoryName
* @param regexPattern
* @return
*/
private static List getFilesAndDirectoriesTreeByRegex(String directoryName,String regexPattern){
File directory = new File(directoryName);
List treeDataList=new ArrayList();
File[] fList = directory.listFiles();
if(fList==null){
return treeDataList;
}
for (File file : fList){
if(!file.getName().matches(regexPattern)){
continue;
}
if (file.isFile()){
treeDataList.add(new TreeFile(file));
} else if (file.isDirectory()){
TreeDirectory treeDirectory=new TreeDirectory(file);
treeDataList.add(treeDirectory);
treeDirectory.setChildList(getFilesAndDirectoriesTreeByRegex(file.getAbsolutePath(),regexPattern));
}
}
return treeDataList;
}
}
