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117 lines
3.9 KiB
Java
117 lines
3.9 KiB
Java
/*
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* Apocalypse Laboratories
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* Open Source License
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*
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* Source code can be used for any purpose, as long as:
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* - Compiled binaries are rebranded and trademarks are not
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* visible by the end user at any time, except to give
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* credit to Apocalypse Laboratories, such as by showing
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* "Based on <product> by Apocalypse Laboratories" or a
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* similar notice;
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* - You do not use the code for evil;
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* - Rebranded compiled applications have significant
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* differences in functionality;
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* - and you provide your modified source code for download,
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* under the terms of the GNU LGPL v3 or a comparable
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* license.
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*
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* Compiled binaries cannot be redistributed or mirrored,
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* unless:
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* - You have written permission from Apocalypse Laboratories;
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* - Downloads are not available from Apocalypse Laboratories,
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* not even behind a paywall or other blocking mechanism;
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* - or you have received a multi-computer license, in which
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* case you should take measures to prevent unauthorized
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* downloads, such as preventing download access from the
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* Internet.
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*/
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package net.apocalypselabs.symat;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.PrintStream;
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import java.nio.charset.StandardCharsets;
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import java.nio.file.Files;
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import java.nio.file.Paths;
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import javax.swing.JFileChooser;
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import javax.swing.filechooser.FileNameExtensionFilter;
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/**
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* File Utilities.
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*
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* @author Skylar
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*/
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public class FileUtils {
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/**
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* Read a UTF-8 text file.
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*
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* @param path Where is the file?
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* @return The file contents.
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* @throws IOException
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*/
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public static String readFile(String path)
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throws IOException {
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byte[] encoded = Files.readAllBytes(Paths.get(path));
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return new String(encoded, StandardCharsets.UTF_8);
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}
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/**
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* Returns the selected file from a JFileChooser, including the extension
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* from the file filter.
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*
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* Credit to http://stackoverflow.com/users/964243/boann
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*
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* @param c The JFileChooser to extract from.
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* @return duh.
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*/
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public static File getFileWithExtension(JFileChooser c) {
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File file = c.getSelectedFile();
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if (c.getFileFilter() instanceof FileNameExtensionFilter) {
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String[] exts = ((FileNameExtensionFilter) c.getFileFilter()).getExtensions();
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String nameLower = file.getName().toLowerCase();
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for (String ext : exts) { // check if it already has a valid extension
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if (nameLower.endsWith('.' + ext.toLowerCase())) {
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return file; // if yes, return as-is
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}
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}
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// if not, append the first extension from the selected filter
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file = new File(file.toString() + '.' + exts[0]);
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}
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return file;
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}
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public static void saveFile(String content, String path, boolean addToRecent)
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throws IOException {
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try (PrintStream out = new PrintStream(new FileOutputStream(path))) {
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out.print(content);
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}
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if (addToRecent) {
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MainGUI.addRecentFile((new File(path)).getAbsolutePath());
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}
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}
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/**
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* Get an MD5 hash.
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*
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* http://stackoverflow.com/a/6565597/2534036
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* @param md5 the text to hash.
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* @return
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*/
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public static String MD5(String md5) {
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try {
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java.security.MessageDigest md =
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java.security.MessageDigest.getInstance("MD5");
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byte[] array = md.digest(md5.getBytes());
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StringBuffer sb = new StringBuffer();
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for (int i = 0; i < array.length; ++i) {
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sb.append(Integer.toHexString((array[i] & 0xFF) | 0x100).substring(1, 3));
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}
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return sb.toString();
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} catch (java.security.NoSuchAlgorithmException e) {
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}
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return null;
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}
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}
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