mirror of
https://github.com/gsantner/dandelion
synced 2024-11-16 01:12:08 +01:00
341 lines
11 KiB
Java
341 lines
11 KiB
Java
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/*#######################################################
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*
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* Maintained by Gregor Santner, 2017-
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* https://gsantner.net/
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*
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* License: Apache 2.0
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* https://github.com/gsantner/opoc/#licensing
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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#########################################################*/
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package net.gsantner.opoc.util;
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import java.io.BufferedInputStream;
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import java.io.BufferedOutputStream;
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import java.io.BufferedReader;
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import java.io.BufferedWriter;
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import java.io.ByteArrayOutputStream;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileNotFoundException;
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import java.io.FileOutputStream;
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import java.io.FileWriter;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.io.OutputStream;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Locale;
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import java.util.UUID;
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import java.util.regex.Pattern;
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@SuppressWarnings({"WeakerAccess", "unused", "SameParameterValue", "SpellCheckingInspection", "deprecation"})
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public class FileUtils {
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// Used on methods like copyFile(src, dst)
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private static final int BUFFER_SIZE = 4096;
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public static String readTextFile(final File file) {
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try {
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return readCloseTextStream(new FileInputStream(file));
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} catch (FileNotFoundException e) {
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System.err.println("readTextFile: File " + file + " not found.");
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}
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return "";
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}
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public static String readCloseTextStream(final InputStream stream) {
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return readCloseTextStream(stream, true).get(0);
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}
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public static List<String> readCloseTextStream(final InputStream stream, boolean concatToOneString) {
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final ArrayList<String> lines = new ArrayList<>();
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BufferedReader reader = null;
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String line = "";
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try {
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StringBuilder sb = new StringBuilder();
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reader = new BufferedReader(new InputStreamReader(stream));
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while ((line = reader.readLine()) != null) {
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if (concatToOneString) {
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sb.append(line).append('\n');
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} else {
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lines.add(line);
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}
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}
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line = sb.toString();
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} catch (IOException e) {
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e.printStackTrace();
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} finally {
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if (reader != null) {
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try {
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reader.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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if (concatToOneString) {
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lines.clear();
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lines.add(line);
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}
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return lines;
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}
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public static byte[] readBinaryFile(final File file) {
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try {
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return readCloseBinaryStream(new FileInputStream(file), (int) file.length());
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} catch (FileNotFoundException e) {
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System.err.println("readBinaryFile: File " + file + " not found.");
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}
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return new byte[0];
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}
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public static byte[] readCloseBinaryStream(final InputStream stream, int byteCount) {
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final ArrayList<String> lines = new ArrayList<>();
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BufferedInputStream reader = null;
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byte[] buf = new byte[byteCount];
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int totalBytesRead = 0;
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try {
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reader = new BufferedInputStream(stream);
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while (totalBytesRead < byteCount) {
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int bytesRead = reader.read(buf, totalBytesRead, byteCount - totalBytesRead);
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if (bytesRead > 0) {
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totalBytesRead = totalBytesRead + bytesRead;
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}
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}
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} catch (IOException e) {
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e.printStackTrace();
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} finally {
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if (reader != null) {
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try {
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reader.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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return buf;
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}
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// Read binary stream (of unknown conf size)
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public static byte[] readCloseBinaryStream(final InputStream stream) {
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ByteArrayOutputStream baos = new ByteArrayOutputStream();
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try {
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byte[] buffer = new byte[BUFFER_SIZE];
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int read;
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while ((read = stream.read(buffer)) != -1) {
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baos.write(buffer, 0, read);
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}
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} catch (IOException e) {
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e.printStackTrace();
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} finally {
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if (stream != null) {
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try {
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stream.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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return baos.toByteArray();
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}
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public static boolean writeFile(final File file, byte[] data) {
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try {
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OutputStream output = null;
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try {
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output = new BufferedOutputStream(new FileOutputStream(file));
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output.write(data);
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output.flush();
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return true;
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} finally {
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if (output != null) {
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output.close();
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}
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}
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} catch (Exception ex) {
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return false;
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}
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}
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public static boolean writeFile(final File file, final String content) {
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BufferedWriter writer = null;
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try {
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if (!file.getParentFile().isDirectory() && !file.getParentFile().mkdirs())
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return false;
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writer = new BufferedWriter(new FileWriter(file));
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writer.write(content);
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writer.flush();
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return true;
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} catch (IOException e) {
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e.printStackTrace();
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return false;
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} finally {
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if (writer != null) {
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try {
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writer.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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}
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public static boolean copyFile(final File src, final File dst) {
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// Just touch file if src is empty
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if (src.length() == 0) {
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return touch(dst);
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}
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InputStream is = null;
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FileOutputStream os = null;
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try {
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try {
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is = new FileInputStream(src);
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os = new FileOutputStream(dst);
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byte[] buf = new byte[BUFFER_SIZE];
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int len;
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while ((len = is.read(buf)) > 0) {
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os.write(buf, 0, len);
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}
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return true;
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} finally {
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if (is != null) {
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is.close();
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}
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if (os != null) {
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os.close();
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}
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}
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} catch (IOException ex) {
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return false;
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}
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}
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// Returns -1 if the file did not contain any of the needles, otherwise,
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// the index of which needle was found in the contents of the file.
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//
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// Needless MUST be in lower-case.
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public static int fileContains(File file, String... needles) {
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try {
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FileInputStream in = new FileInputStream(file);
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int i;
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String line;
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BufferedReader reader = new BufferedReader(new InputStreamReader(in));
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while ((line = reader.readLine()) != null) {
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for (i = 0; i != needles.length; ++i)
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if (line.toLowerCase(Locale.ROOT).contains(needles[i])) {
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return i;
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}
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}
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in.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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return -1;
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}
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public static boolean deleteRecursive(final File file) {
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boolean ok = true;
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if (file.exists()) {
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if (file.isDirectory()) {
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for (File child : file.listFiles())
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ok &= deleteRecursive(child);
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}
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ok &= file.delete();
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}
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return ok;
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}
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// Example: Check if this is maybe a conf: (str, "jpg", "png", "jpeg")
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public static boolean hasExtension(String str, String... extensions) {
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String lc = str.toLowerCase(Locale.ROOT);
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for (String extension : extensions) {
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if (lc.endsWith("." + extension.toLowerCase(Locale.ROOT))) {
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return true;
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}
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}
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return false;
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}
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public static boolean renameFile(File srcFile, File destFile) {
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if (srcFile.getAbsolutePath().equals(destFile.getAbsolutePath())) {
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return false;
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}
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// renameTo will fail in case of case-changed filename in same dir.Even on case-sensitive FS!!!
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if (srcFile.getParent().equals(destFile.getParent()) && srcFile.getName().toLowerCase(Locale.getDefault()).equals(destFile.getName().toLowerCase(Locale.getDefault()))) {
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File tmpFile = new File(destFile.getParent(), UUID.randomUUID().getLeastSignificantBits() + ".tmp");
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if (!tmpFile.exists()) {
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renameFile(srcFile, tmpFile);
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srcFile = tmpFile;
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}
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}
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if (!srcFile.renameTo(destFile)) {
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if (copyFile(srcFile, destFile) && !srcFile.delete()) {
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if (!destFile.delete()) {
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return false;
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}
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return false;
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}
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}
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return true;
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}
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@SuppressWarnings("ResultOfMethodCallIgnored")
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public static boolean renameFileInSameFolder(File srcFile, String destFilename) {
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return renameFile(srcFile, new File(srcFile.getParent(), destFilename));
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}
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public static boolean touch(File file) {
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try {
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if (!file.exists()) {
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new FileOutputStream(file).close();
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}
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return file.setLastModified(System.currentTimeMillis());
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} catch (IOException e) {
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return false;
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}
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}
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// Get relative path to specified destination
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public static String relativePath(File src, File dest) {
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try {
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String[] srcSplit = (src.isDirectory() ? src : src.getParentFile()).getCanonicalPath().split(Pattern.quote(File.separator));
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String[] destSplit = dest.getCanonicalPath().split(Pattern.quote(File.separator));
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StringBuilder sb = new StringBuilder();
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int i = 0;
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for (; i < destSplit.length && i < srcSplit.length; ++i) {
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if (!destSplit[i].equals(srcSplit[i]))
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break;
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}
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if (i != srcSplit.length) {
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for (int iUpperDir = i; iUpperDir < srcSplit.length; ++iUpperDir) {
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sb.append("..");
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sb.append(File.separator);
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}
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}
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for (; i < destSplit.length; ++i) {
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sb.append(destSplit[i]);
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sb.append(File.separator);
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}
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if (!dest.getPath().endsWith("/") && !dest.getPath().endsWith("\\")) {
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sb.delete(sb.length() - File.separator.length(), sb.length());
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}
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return sb.toString();
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} catch (IOException | NullPointerException exception) {
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return null;
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}
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}
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}
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