+++ /dev/null
-/*
- * jSite - FileScanner.java - Copyright © 2006–2012 David Roden
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
-
-package de.todesbaum.jsite.gui;
-
-import java.io.File;
-import java.io.FileFilter;
-import java.io.FileInputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.OutputStream;
-import java.security.DigestOutputStream;
-import java.security.MessageDigest;
-import java.security.NoSuchAlgorithmException;
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.List;
-import java.util.logging.Level;
-import java.util.logging.Logger;
-
-import de.todesbaum.jsite.application.Project;
-import de.todesbaum.jsite.i18n.I18n;
-import de.todesbaum.util.io.Closer;
-import de.todesbaum.util.io.StreamCopier;
-
-/**
- * Scans the local path of a project anychronously and returns the list of found
- * files as an event.
- *
- * @see Project#getLocalPath()
- * @see FileScannerListener#fileScannerFinished(FileScanner)
- * @author David ‘Bombe’ Roden <bombe@freenetproject.org>
- */
-public class FileScanner implements Runnable {
-
- /** The logger. */
- private final static Logger logger = Logger.getLogger(FileScanner.class.getName());
-
- /** The list of listeners. */
- private final List<FileScannerListener> fileScannerListeners = new ArrayList<FileScannerListener>();
-
- /** The project to scan. */
- private final Project project;
-
- /** The list of found files. */
- private List<ScannedFile> files;
-
- /** Wether there was an error. */
- private boolean error = false;
-
- /**
- * Creates a new file scanner for the given project.
- *
- * @param project
- * The project whose files to scan
- */
- public FileScanner(Project project) {
- this.project = project;
- }
-
- /**
- * Adds the given listener to the list of listeners.
- *
- * @param fileScannerListener
- * The listener to add
- */
- public void addFileScannerListener(FileScannerListener fileScannerListener) {
- fileScannerListeners.add(fileScannerListener);
- }
-
- /**
- * Removes the given listener from the list of listeners.
- *
- * @param fileScannerListener
- * The listener to remove
- */
- public void removeFileScannerListener(FileScannerListener fileScannerListener) {
- fileScannerListeners.remove(fileScannerListener);
- }
-
- /**
- * Notifies all listeners that the file scan finished.
- */
- protected void fireFileScannerFinished() {
- for (FileScannerListener fileScannerListener : new ArrayList<FileScannerListener>(fileScannerListeners)) {
- fileScannerListener.fileScannerFinished(this);
- }
- }
-
- /**
- * {@inheritDoc}
- * <p>
- * Scans all available files in the project’s local path and emits an event
- * when finished.
- *
- * @see FileScannerListener#fileScannerFinished(FileScanner)
- */
- public void run() {
- files = new ArrayList<ScannedFile>();
- error = false;
- try {
- scanFiles(new File(project.getLocalPath()), files);
- Collections.sort(files);
- } catch (IOException ioe1) {
- error = true;
- }
- fireFileScannerFinished();
- }
-
- /**
- * Returns whether there was an error scanning for files.
- *
- * @return <code>true</code> if there was an error, <code>false</code>
- * otherwise
- */
- public boolean isError() {
- return error;
- }
-
- /**
- * Returns the list of found files.
- *
- * @return The list of found files
- */
- public List<ScannedFile> getFiles() {
- return files;
- }
-
- /**
- * Recursively scans a directory and adds all found files to the given list.
- *
- * @param rootDir
- * The directory to scan
- * @param fileList
- * The list to which to add the found files
- * @throws IOException
- * if an I/O error occurs
- */
- private void scanFiles(File rootDir, List<ScannedFile> fileList) throws IOException {
- File[] files = rootDir.listFiles(new FileFilter() {
-
- @SuppressWarnings("synthetic-access")
- public boolean accept(File file) {
- return !project.isIgnoreHiddenFiles() || !file.isHidden();
- }
- });
- if (files == null) {
- throw new IOException(I18n.getMessage("jsite.file-scanner.can-not-read-directory"));
- }
- for (File file : files) {
- if (file.isDirectory()) {
- scanFiles(file, fileList);
- continue;
- }
- String filename = project.shortenFilename(file).replace('\\', '/');
- String hash = hashFile(project.getLocalPath(), filename);
- fileList.add(new ScannedFile(filename, hash));
- }
- }
-
- /**
- * Hashes the given file.
- *
- * @param path
- * The path of the project
- * @param filename
- * The name of the file, relative to the project path
- * @return The hash of the file
- */
- @SuppressWarnings("synthetic-access")
- private static String hashFile(String path, String filename) {
- InputStream fileInputStream = null;
- DigestOutputStream digestOutputStream = null;
- File file = new File(path, filename);
- try {
- fileInputStream = new FileInputStream(file);
- digestOutputStream = new DigestOutputStream(new NullOutputStream(), MessageDigest.getInstance("SHA-256"));
- StreamCopier.copy(fileInputStream, digestOutputStream, file.length());
- return toHex(digestOutputStream.getMessageDigest().digest());
- } catch (NoSuchAlgorithmException nsae1) {
- logger.log(Level.WARNING, "Could not get SHA-256 digest!", nsae1);
- } catch (IOException ioe1) {
- logger.log(Level.WARNING, "Could not read file!", ioe1);
- } finally {
- Closer.close(digestOutputStream);
- Closer.close(fileInputStream);
- }
- return toHex(new byte[32]);
- }
-
- /**
- * Converts the given byte array into a hexadecimal string.
- *
- * @param array
- * The array to convert
- * @return The hexadecimal string
- */
- private static String toHex(byte[] array) {
- StringBuilder hexString = new StringBuilder(array.length * 2);
- for (byte b : array) {
- hexString.append("0123456789abcdef".charAt((b >>> 4) & 0x0f)).append("0123456789abcdef".charAt(b & 0xf));
- }
- return hexString.toString();
- }
-
- /**
- * {@link OutputStream} that discards all written bytes.
- *
- * @author David ‘Bombe’ Roden <bombe@freenetproject.org>
- */
- private static class NullOutputStream extends OutputStream {
-
- /**
- * {@inheritDoc}
- */
- @Override
- public void write(int b) {
- /* do nothing. */
- }
-
- /**
- * {@inheritDoc}
- */
- @Override
- public void write(byte[] b) {
- /* do nothing. */
- }
-
- /**
- * {@inheritDoc}
- */
- @Override
- public void write(byte[] b, int off, int len) {
- /* do nothing. */
- }
-
- }
-
- /**
- * Container for a scanned file, consisting of the name of the file and its
- * hash.
- *
- * @author David ‘Bombe’ Roden <bombe@freenetproject.org>
- */
- public static class ScannedFile implements Comparable<ScannedFile> {
-
- /** The name of the file. */
- private final String filename;
-
- /** The hash of the file. */
- private final String hash;
-
- /**
- * Creates a new scanned file.
- *
- * @param filename
- * The name of the file
- * @param hash
- * The hash of the file
- */
- public ScannedFile(String filename, String hash) {
- this.filename = filename;
- this.hash = hash;
- }
-
- //
- // ACCESSORS
- //
-
- /**
- * Returns the name of the file.
- *
- * @return The name of the file
- */
- public String getFilename() {
- return filename;
- }
-
- /**
- * Returns the hash of the file.
- *
- * @return The hash of the file
- */
- public String getHash() {
- return hash;
- }
-
- //
- // OBJECT METHODS
- //
-
- /**
- * {@inheritDoc}
- */
- @Override
- public int hashCode() {
- return filename.hashCode();
- }
-
- /**
- * {@inheritDoc}
- */
- @Override
- public boolean equals(Object obj) {
- return filename.equals(obj);
- }
-
- /**
- * {@inheritDoc}
- */
- @Override
- public String toString() {
- return filename;
- }
-
- //
- // COMPARABLE METHODS
- //
-
- /**
- * {@inheritDoc}
- */
- public int compareTo(ScannedFile scannedFile) {
- return filename.compareTo(scannedFile.filename);
- }
-
- }
-
-}
projects / jSite.git / blobdiff