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org.tomitribe.util.IO Maven / Gradle / Ivy
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.tomitribe.util;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.Closeable;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.Flushable;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintStream;
import java.io.UnsupportedEncodingException;
import java.net.URL;
import java.nio.ByteBuffer;
import java.nio.channels.Channels;
import java.nio.channels.ReadableByteChannel;
import java.nio.channels.WritableByteChannel;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Properties;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;
@SuppressWarnings("UnusedDeclaration")
public class IO {
private IO() {
// no-op
}
public static Properties readProperties(final URL resource) throws IOException {
return readProperties(resource, new Properties());
}
public static Properties readProperties(final URL resource, final Properties properties) throws IOException {
return readProperties(read(resource), properties);
}
public static Properties readProperties(final File resource) throws IOException {
return readProperties(resource, new Properties());
}
public static Properties readProperties(final File resource, final Properties properties) throws IOException {
return readProperties(read(resource), properties);
}
/**
* Reads and closes the input stream
*
* @param in InputStream
* @param properties Properties
* @return Properties
* @throws java.io.IOException
*/
public static Properties readProperties(final InputStream in, final Properties properties) throws IOException {
if (in == null) throw new NullPointerException("InputStream is null");
if (properties == null) throw new NullPointerException("Properties is null");
try {
properties.load(in);
} finally {
close(in);
}
return properties;
}
public static String readString(final URL url) throws IOException {
final InputStream in = url.openStream();
try {
final BufferedReader reader = new BufferedReader(new InputStreamReader(in));
return reader.readLine();
} finally {
close(in);
}
}
public static String readString(final File file) throws IOException {
final FileReader in = new FileReader(file);
try {
final BufferedReader reader = new BufferedReader(in);
return reader.readLine();
} finally {
close(in);
}
}
public static byte[] readBytes(final File file) throws IOException {
final InputStream in = read(file);
try {
return readBytes(in);
} finally {
close(in);
}
}
public static byte[] readBytes(final URL url) throws IOException {
final InputStream in = read(url);
try {
return readBytes(in);
} finally {
close(in);
}
}
public static byte[] readBytes(final InputStream in) throws IOException {
final ByteArrayOutputStream out = new ByteArrayOutputStream();
copy(in, out);
return out.toByteArray();
}
public static String slurp(final File file) throws IOException {
return slurp(read(file));
}
public static String slurp(final URL url) throws IOException {
return slurp(url.openStream());
}
public static String slurp(final InputStream in) throws IOException {
return new String(readBytes(in));
}
public static void writeString(final File file, final String string) throws IOException {
final FileWriter out = new FileWriter(file);
try {
final BufferedWriter bufferedWriter = new BufferedWriter(out);
try {
bufferedWriter.write(string);
bufferedWriter.newLine();
} finally {
close(bufferedWriter);
}
} finally {
close(out);
}
}
public static void copy(final File from, final File to) throws IOException {
if (!from.isDirectory()) {
final FileOutputStream fos = new FileOutputStream(to);
try {
copy(from, fos);
} finally {
close(fos);
}
} else {
copyDirectory(from, to);
}
}
public static void copyDirectory(final File srcDir, final File destDir) throws IOException {
if (srcDir == null) throw new NullPointerException("Source must not be null");
if (destDir == null) throw new NullPointerException("Destination must not be null");
if (!srcDir.exists()) throw new FileNotFoundException("Source '" + srcDir + "' does not exist");
if (!srcDir.isDirectory()) throw new IOException("Source '" + srcDir + "' exists but is not a directory");
if (srcDir.getCanonicalPath().equals(destDir.getCanonicalPath())) {
throw new IOException("Source '" + srcDir + "' and destination '" + destDir + "' are the same");
}
// Cater for destination being directory within the source directory (see IO-141)
List exclusionList = null;
if (destDir.getCanonicalPath().startsWith(srcDir.getCanonicalPath())) {
final File[] srcFiles = srcDir.listFiles();
if (srcFiles != null && srcFiles.length > 0) {
exclusionList = new ArrayList(srcFiles.length);
for (final File srcFile : srcFiles) {
final File copiedFile = new File(destDir, srcFile.getName());
exclusionList.add(copiedFile.getCanonicalPath());
}
}
}
doCopyDirectory(srcDir, destDir, exclusionList);
}
private static void doCopyDirectory(final File srcDir, final File destDir, final List exclusionList)
throws IOException {
final File[] files = srcDir.listFiles();
if (files == null) { // null if security restricted
throw new IOException("Failed to list contents of " + srcDir);
}
if (destDir.exists()) {
if (!destDir.isDirectory()) {
throw new IOException("Destination '" + destDir + "' exists but is not a directory");
}
} else {
if (!destDir.mkdirs()) {
throw new IOException("Destination '" + destDir + "' directory cannot be created");
}
}
if (!destDir.canWrite()) {
throw new IOException("Destination '" + destDir + "' cannot be written to");
}
for (final File file : files) {
final File copiedFile = new File(destDir, file.getName());
if (exclusionList == null || !exclusionList.contains(file.getCanonicalPath())) {
if (file.isDirectory()) {
doCopyDirectory(file, copiedFile, exclusionList);
} else {
copy(file, copiedFile);
}
}
}
}
public static void copy(final File from, final OutputStream to) throws IOException {
final InputStream read = read(from);
try {
copy(read, to);
} finally {
close(read);
}
}
public static void copy(final URL from, final OutputStream to) throws IOException {
final InputStream read = read(from);
try {
copy(read, to);
} finally {
close(read);
}
}
public static void copy(final InputStream from, final File to) throws IOException {
final OutputStream write = write(to);
try {
copy(from, write);
} finally {
close(write);
}
}
public static void copy(final URL from, final File to) throws IOException {
final OutputStream write = write(to);
try {
copy(from, write);
} finally {
close(write);
}
}
public static void copy(final InputStream from, final File to, final boolean append) throws IOException {
final OutputStream write = write(to, append);
try {
copy(from, write);
} finally {
close(write);
}
}
public static void copy(final InputStream from, final OutputStream to) throws IOException {
final byte[] buffer = new byte[1024];
int length;
while ((length = from.read(buffer)) != -1) {
to.write(buffer, 0, length);
}
to.flush();
}
public static void copy(final byte[] from, final File to) throws IOException {
copy(new ByteArrayInputStream(from), to);
}
public static void copy(final byte[] from, final OutputStream to) throws IOException {
copy(new ByteArrayInputStream(from), to);
}
public static ZipOutputStream zip(final File file) throws IOException {
final OutputStream write = write(file);
return new ZipOutputStream(write);
}
public static ZipInputStream unzip(final File file) throws IOException {
final InputStream read = read(file);
return new ZipInputStream(read);
}
public static void close(final Closeable closeable) {
if (closeable == null) return;
try {
if (Flushable.class.isInstance(closeable)) {
((Flushable) closeable).flush();
}
} catch (final Throwable e) {
//Ignore
}
try {
closeable.close();
} catch (final Throwable e) {
//Ignore
}
}
public static boolean delete(final File file) {
if (file == null) return false;
if (!file.delete()) {
Logger.getLogger(IO.class.getName()).log(Level.WARNING, "Delete failed on: " + file.getAbsolutePath());
return false;
}
return true;
}
public static OutputStream write(final File destination) throws FileNotFoundException {
final OutputStream out = new FileOutputStream(destination);
return new BufferedOutputStream(out, 32768);
}
public static OutputStream write(final File destination, final boolean append) throws FileNotFoundException {
final OutputStream out = new FileOutputStream(destination, append);
return new BufferedOutputStream(out, 32768);
}
public static PrintStream print(final File destination, final boolean append) throws FileNotFoundException {
return print(write(destination, append));
}
public static PrintStream print(final File destination) throws FileNotFoundException {
return print(write(destination));
}
public static PrintStream print(final OutputStream out) {
return new PrintStream(out);
}
public static InputStream read(final File source) throws FileNotFoundException {
final InputStream in = new FileInputStream(source);
return new BufferedInputStream(in, 32768);
}
public static InputStream read(final String content) {
return read(content.getBytes());
}
public static InputStream read(final String content, final String encoding) throws UnsupportedEncodingException {
return read(content.getBytes(encoding));
}
public static InputStream read(final byte[] content) {
return new ByteArrayInputStream(content);
}
public static InputStream read(final URL url) throws IOException {
return url.openStream();
}
public static Iterable readLines(final File file) throws FileNotFoundException {
return readLines(read(file));
}
public static Iterable readLines(final InputStream inputStream) {
return readLines(new BufferedReader(new InputStreamReader(inputStream)));
}
public static Iterable readLines(final BufferedReader reader) {
return new BufferedReaderIterable(reader);
}
public static void copyNIO(final InputStream in, final OutputStream out) throws IOException {
final ReadableByteChannel ic = Channels.newChannel(in);
final WritableByteChannel oc = Channels.newChannel(out);
try {
copy(ic, oc);
} finally {
ic.close();
oc.close();
}
}
public static void copy(final ReadableByteChannel in, final WritableByteChannel out) throws IOException {
final ByteBuffer buffer = ByteBuffer.allocateDirect(8 * 1024);
while (in.read(buffer) != -1) {
buffer.flip();
out.write(buffer);
buffer.compact();
}
buffer.flip();
while (buffer.hasRemaining()) {
out.write(buffer);
}
}
private static class BufferedReaderIterable implements Iterable {
private final BufferedReader reader;
private BufferedReaderIterable(final BufferedReader reader) {
this.reader = reader;
}
@Override
public Iterator iterator() {
return new BufferedReaderIterator();
}
private class BufferedReaderIterator implements Iterator {
private String line;
@Override
// CHECKSTYLE:OFF
public boolean hasNext() {
try {
final boolean hasNext = (line = reader.readLine()) != null;
if (!hasNext) {
close(reader);
}
return hasNext;
} catch (final IOException e) {
throw new IllegalStateException(e);
}
}
@Override
public String next() {
return line;
}
@Override
public void remove() {
throw new UnsupportedOperationException("remove not supported");
}
}
}
}
