X-Git-Url: http://git.nikiroo.be/?a=blobdiff_plain;f=src%2Fbe%2Fnikiroo%2Futils%2FIOUtils.java;h=0d9bc378a83b856599eae7f2afaec30fa3711332;hb=c175bf6f922a807891d2616cf2f0bfe74dea1ffb;hp=4a185c6386ba31b84a474540f82d78aa25d691dc;hpb=7ee9568bee3caddfb837007dda09460acc145177;p=nikiroo-utils.git diff --git a/src/be/nikiroo/utils/IOUtils.java b/src/be/nikiroo/utils/IOUtils.java index 4a185c6..0d9bc37 100644 --- a/src/be/nikiroo/utils/IOUtils.java +++ b/src/be/nikiroo/utils/IOUtils.java @@ -1,23 +1,21 @@ package be.nikiroo.utils; -import java.awt.Image; -import java.awt.geom.AffineTransform; -import java.awt.image.AffineTransformOp; -import java.awt.image.BufferedImage; import java.io.BufferedReader; +import java.io.ByteArrayOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; -import java.io.FileReader; import java.io.FileWriter; import java.io.IOException; import java.io.InputStream; +import java.io.InputStreamReader; import java.io.OutputStream; +import java.util.ArrayList; +import java.util.List; import java.util.zip.ZipEntry; +import java.util.zip.ZipInputStream; import java.util.zip.ZipOutputStream; -import javax.imageio.ImageIO; - /** * This class offer some utilities based around Streams. * @@ -49,7 +47,7 @@ public class IOUtils { * * @param in * the data source - * @param target + * @param out * the target {@link OutputStream} * * @throws IOException @@ -92,8 +90,12 @@ public class IOUtils { } zip.putNextEntry(new ZipEntry(base + "/")); } - for (File file : target.listFiles()) { - zip(zip, base, file, false); + + File[] files = target.listFiles(); + if (files != null) { + for (File file : files) { + zip(zip, base, file, false); + } } } else { if (base == null || base.isEmpty()) { @@ -118,7 +120,7 @@ public class IOUtils { * the source {@link File} (which can be a directory) * @param dest * the destination .zip file - * @param srctIsRoot + * @param srcIsRoot * FALSE if we need to add a {@link ZipEntry} for src, TRUE to * add it at the root of the ZIP * @@ -140,6 +142,58 @@ public class IOUtils { } } + /** + * Unzip the given ZIP file into the target directory. + * + * @param zipFile + * the ZIP file + * @param targetDirectory + * the target directory + * + * @return the number of extracted files (not directories) + * + * @throws IOException + * in case of I/O errors + */ + public static long unzip(File zipFile, File targetDirectory) + throws IOException { + long count = 0; + + if (targetDirectory.exists() && targetDirectory.isFile()) { + throw new IOException("Cannot unzip " + zipFile + " into " + + targetDirectory + ": it is not a directory"); + } + + targetDirectory.mkdir(); + if (!targetDirectory.exists()) { + throw new IOException("Cannot create target directory " + + targetDirectory); + } + + FileInputStream in = new FileInputStream(zipFile); + try { + ZipInputStream zipStream = new ZipInputStream(in); + try { + for (ZipEntry entry = zipStream.getNextEntry(); entry != null; entry = zipStream + .getNextEntry()) { + File file = new File(targetDirectory, entry.getName()); + if (entry.isDirectory()) { + file.mkdirs(); + } else { + IOUtils.write(zipStream, file); + count++; + } + } + } finally { + zipStream.close(); + } + } finally { + in.close(); + } + + return count; + } + /** * Write the {@link String} content to {@link File}. * @@ -159,7 +213,23 @@ public class IOUtils { dir.mkdirs(); } - FileWriter writerVersion = new FileWriter(new File(dir, filename)); + writeSmallFile(new File(dir, filename), content); + } + + /** + * Write the {@link String} content to {@link File}. + * + * @param file + * the {@link File} to write + * @param content + * the content + * + * @throws IOException + * in case of I/O error + */ + public static void writeSmallFile(File file, String content) + throws IOException { + FileWriter writerVersion = new FileWriter(file); try { writerVersion.write(content); } finally { @@ -179,149 +249,122 @@ public class IOUtils { * in case of I/O error */ public static String readSmallFile(File file) throws IOException { - BufferedReader reader = new BufferedReader(new FileReader(file)); + InputStream stream = new FileInputStream(file); try { - StringBuilder builder = new StringBuilder(); - for (String line = reader.readLine(); line != null; line = reader - .readLine()) { - builder.append(line); - } - return builder.toString(); + return readSmallStream(stream); } finally { - reader.close(); + stream.close(); + } + } + + /** + * Read the whole {@link InputStream} content into a {@link String}. + * + * @param stream + * the {@link InputStream} + * + * @return the content + * + * @throws IOException + * in case of I/O error + */ + public static String readSmallStream(InputStream stream) throws IOException { + // do NOT close the reader, or the related stream will be closed, too + // reader.close(); + BufferedReader reader = new BufferedReader( + new InputStreamReader(stream)); + + StringBuilder builder = new StringBuilder(); + for (String line = reader.readLine(); line != null; line = reader + .readLine()) { + builder.append(line); + builder.append("\n"); } + + return builder.toString(); } /** * Recursively delete the given {@link File}, which may of course also be a * directory. *
- * Will silently continue in case of error.
+ * Will either silently continue or throw an exception in case of error,
+ * depending upon the parameters.
*
* @param target
* the target to delete
+ * @param exception
+ * TRUE to throw an {@link IOException} in case of error, FALSE
+ * to silently continue
+ *
+ * @return TRUE if all files were deleted, FALSE if an error occurred
+ *
+ * @throws IOException
+ * if an error occurred and the parameters allow an exception to
+ * be thrown
*/
- public static void deltree(File target) {
- File[] files = target.listFiles();
- if (files != null) {
- for (File file : files) {
- deltree(file);
+ public static boolean deltree(File target, boolean exception)
+ throws IOException {
+ List
+ * Will silently continue in case of error.
*
- * @return the {@link Image} object
+ * @param target
+ * the target to delete
*
- * @throws IOException
- * in case of IO error
+ * @return TRUE if all files were deleted, FALSE if an error occurred
*/
- public static BufferedImage toImage(InputStream in) throws IOException {
- MarkableFileInputStream tmpIn = null;
- File tmp = null;
- try {
- in.reset();
- } catch (IOException e) {
- tmp = File.createTempFile("fanfic-tmp-image", ".tmp");
- tmp.deleteOnExit();
- IOUtils.write(in, tmp);
- tmpIn = new MarkableFileInputStream(new FileInputStream(tmp));
- }
+ public static boolean deltree(File target) {
+ return deltree(target, null).isEmpty();
+ }
- int orientation;
- try {
- orientation = getExifTransorm(in);
- } catch (Exception e) {
- // no EXIF transform, ok
- orientation = -1;
+ /**
+ * Recursively delete the given {@link File}, which may of course also be a
+ * directory.
+ *
+ * Will collect all {@link File} that cannot be deleted in the given
+ * accumulator.
+ *
+ * @param target
+ * the target to delete
+ * @param errorAcc
+ * the accumulator to use for errors, or NULL to create a new one
+ *
+ * @return the errors accumulator
+ */
+ public static List
- * Note: this code has been found on internet; thank you anonymous coder.
- *