Java Force Delete forceDelete(File file)

Description

force Delete

License

Apache License

Declaration

public static void forceDelete(File file) throws IOException 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.io.File;
import java.io.FileFilter;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.util.Locale;

public class Main {
    private static final char SYSTEM_SEPARATOR = File.separatorChar;

    public static void forceDelete(File file) throws IOException {
        if (file.isDirectory()) {
            deleteDirectory(file);/*w w w.j  a v a2 s.  c o m*/
        } else {
            boolean filePresent = file.exists();
            if (!file.delete()) {
                if (!filePresent) {
                    throw new FileNotFoundException("File does not exist: "
                            + file);
                }
                String message = "Unable to delete file: " + file;
                throw new IOException(message);
            }
        }
    }

    public static void deleteDirectory(File directory) throws IOException {
        if (!directory.exists()) {
            return;
        }
        if (!isSymlink(directory)) {
            cleanDirectory(directory);
        }
        if (!directory.delete()) {
            String message = "Unable to delete directory " + directory
                    + ".";
            throw new IOException(message);
        }
    }

    public static boolean isSymlink(File file) throws IOException {
        if (file == null) {
            throw new NullPointerException("File must not be null");
        }
        if (isSystemWindows()) {
            return false;
        }
        File fileInCanonicalDir = null;
        if (file.getParent() == null) {
            fileInCanonicalDir = file;
        } else {
            File canonicalDir = file.getParentFile().getCanonicalFile();
            fileInCanonicalDir = new File(canonicalDir, file.getName());
        }
        if (fileInCanonicalDir.getCanonicalFile().equals(
                fileInCanonicalDir.getAbsoluteFile())) {
            return false;
        }
        return true;
    }

    public static void cleanDirectory(File directory) throws IOException {
        if (!directory.exists()) {
            String message = directory + " does not exist";
            throw new IllegalArgumentException(message);
        }
        if (!directory.isDirectory()) {
            String message = directory + " is not a directory";
            throw new IllegalArgumentException(message);
        }
        File[] files = directory.listFiles();
        if (files == null) {
            throw new IOException("Failed to list contents of " + directory);
        }
        IOException exception = null;
        for (File file : files) {
            try {
                forceDelete(file);
            } catch (IOException ioe) {
                exception = ioe;
            }
        }
        if (null != exception) {
            throw exception;
        }
    }

    static boolean isSystemWindows() {
        return SYSTEM_SEPARATOR == '\\';
    }

    public static File[] listFiles(File dir, String suffix) {
        File[] files = null;
        if (dir.exists()) {
            files = dir.listFiles(new FileFilter() {
                public boolean accept(File pathName) {
                    if ((pathName.isFile())
                            && (pathName.getName().toLowerCase(
                                    Locale.ENGLISH).endsWith(suffix))) {
                        return true;
                    }
                    return false;
                }
            });
        }
        if (files == null) {
            return new File[0];
        }
        return files;
    }
}

Related

1. forceDelete(File f)
2. forceDelete(File file)
3. forceDelete(File file)
4. forceDelete(File file)
5. forceDelete(File file)
6. forceDelete(File file)
7. forceDelete(File file)
8. forceDelete(File file)
9. forceDelete(File path)