/**
* Copyright (c) 2000-present Liferay, Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
* Software Foundation; either version 2.1 of the License, or (at your option)
* any later version.
*
* This library 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 Lesser General Public License for more
* details.
*/
package com.liferay.portal.util;
import com.liferay.portal.kernel.io.unsync.UnsyncBufferedReader;
import com.liferay.portal.kernel.io.unsync.UnsyncByteArrayInputStream;
import com.liferay.portal.kernel.io.unsync.UnsyncByteArrayOutputStream;
import com.liferay.portal.kernel.log.Log;
import com.liferay.portal.kernel.log.LogFactoryUtil;
import com.liferay.portal.kernel.nio.charset.CharsetEncoderUtil;
import com.liferay.portal.kernel.process.ClassPathUtil;
import com.liferay.portal.kernel.process.ProcessCallable;
import com.liferay.portal.kernel.process.ProcessChannel;
import com.liferay.portal.kernel.process.ProcessException;
import com.liferay.portal.kernel.process.ProcessExecutorUtil;
import com.liferay.portal.kernel.security.pacl.DoPrivileged;
import com.liferay.portal.kernel.util.ArrayUtil;
import com.liferay.portal.kernel.util.CharPool;
import com.liferay.portal.kernel.util.Digester;
import com.liferay.portal.kernel.util.DigesterUtil;
import com.liferay.portal.kernel.util.FileComparator;
import com.liferay.portal.kernel.util.PwdGenerator;
import com.liferay.portal.kernel.util.ReflectionUtil;
import com.liferay.portal.kernel.util.StreamUtil;
import com.liferay.portal.kernel.util.StringBundler;
import com.liferay.portal.kernel.util.StringPool;
import com.liferay.portal.kernel.util.StringUtil;
import com.liferay.portal.kernel.util.SystemProperties;
import com.liferay.portal.kernel.util.Time;
import com.liferay.portal.kernel.util.Validator;
import com.liferay.util.ant.ExpandTask;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStreamWriter;
import java.io.RandomAccessFile;
import java.io.Reader;
import java.io.Writer;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Properties;
import java.util.concurrent.Future;
import org.apache.commons.compress.archivers.zip.UnsupportedZipFeatureException;
import org.apache.commons.io.FileUtils;
import org.apache.commons.lang.exception.ExceptionUtils;
import org.apache.poi.EncryptedDocumentException;
import org.apache.tika.Tika;
import org.apache.tika.config.TikaConfig;
import org.apache.tika.exception.TikaException;
import org.apache.tika.io.TikaInputStream;
import org.apache.tika.metadata.Metadata;
import org.apache.tika.parser.txt.UniversalEncodingDetector;
import org.apache.tools.ant.DirectoryScanner;
import org.mozilla.intl.chardet.nsDetector;
import org.mozilla.intl.chardet.nsPSMDetector;
/**
* @author Brian Wing Shun Chan
* @author Alexander Chow
*/
@DoPrivileged
public class FileImpl implements com.liferay.portal.kernel.util.File {
public static FileImpl getInstance() {
return _instance;
}
@Override
public String appendParentheticalSuffix(String fileName, String suffix) {
String fileNameWithoutExtension = stripExtension(fileName);
String fileNameWithParentheticalSuffix =
StringUtil.appendParentheticalSuffix(
fileNameWithoutExtension, suffix);
String extension = getExtension(fileName);
if (Validator.isNull(extension)) {
return fileNameWithParentheticalSuffix;
}
StringBundler sb = new StringBundler(3);
sb.append(fileNameWithParentheticalSuffix);
sb.append(StringPool.PERIOD);
sb.append(extension);
return sb.toString();
}
@Override
public String appendSuffix(String fileName, String suffix) {
StringBundler sb = new StringBundler(4);
String fileNameWithoutExtension = stripExtension(fileName);
sb.append(fileNameWithoutExtension);
sb.append(suffix);
String extension = getExtension(fileName);
if (Validator.isNotNull(extension)) {
sb.append(StringPool.PERIOD);
sb.append(extension);
}
return sb.toString();
}
@Override
public void copyDirectory(File source, File destination)
throws IOException {
if (!source.exists() || !source.isDirectory()) {
return;
}
mkdirs(destination);
File[] fileArray = source.listFiles();
for (int i = 0; i < fileArray.length; i++) {
if (fileArray[i].isDirectory()) {
copyDirectory(
fileArray[i],
new File(
destination.getPath() + File.separator +
fileArray[i].getName()));
}
else {
copyFile(
fileArray[i],
new File(
destination.getPath() + File.separator +
fileArray[i].getName()));
}
}
}
@Override
public void copyDirectory(String sourceDirName, String destinationDirName)
throws IOException {
copyDirectory(new File(sourceDirName), new File(destinationDirName));
}
@Override
public void copyFile(File source, File destination) throws IOException {
copyFile(source, destination, false);
}
@Override
public void copyFile(File source, File destination, boolean lazy)
throws IOException {
if (!source.exists()) {
return;
}
if (lazy) {
String oldContent = null;
try {
oldContent = read(source);
}
catch (Exception e) {
return;
}
String newContent = null;
try {
newContent = read(destination);
}
catch (Exception e) {
}
if ((oldContent == null) || !oldContent.equals(newContent)) {
copyFile(source, destination, false);
}
}
else {
mkdirsParentFile(destination);
StreamUtil.transfer(
new FileInputStream(source), new FileOutputStream(destination));
}
}
@Override
public void copyFile(String source, String destination) throws IOException {
copyFile(source, destination, false);
}
@Override
public void copyFile(String source, String destination, boolean lazy)
throws IOException {
copyFile(new File(source), new File(destination), lazy);
}
@Override
public File createTempFile() {
return createTempFile(StringPool.BLANK);
}
@Override
public File createTempFile(byte[] bytes) throws IOException {
File file = createTempFile(StringPool.BLANK);
write(file, bytes, false);
return file;
}
@Override
public File createTempFile(InputStream is) throws IOException {
File file = createTempFile(StringPool.BLANK);
write(file, is);
return file;
}
@Override
public File createTempFile(String extension) {
return new File(createTempFileName(extension));
}
@Override
public File createTempFile(String prefix, String extension) {
return new File(createTempFileName(prefix, extension));
}
@Override
public String createTempFileName() {
return createTempFileName(null, null);
}
@Override
public String createTempFileName(String extension) {
return createTempFileName(null, extension);
}
@Override
public String createTempFileName(String prefix, String extension) {
StringBundler sb = new StringBundler(7);
sb.append(SystemProperties.get(SystemProperties.TMP_DIR));
sb.append(StringPool.SLASH);
if (Validator.isNotNull(prefix)) {
sb.append(prefix);
}
sb.append(Time.getTimestamp());
sb.append(PwdGenerator.getPassword(8, PwdGenerator.KEY2));
if (Validator.isFileExtension(extension)) {
sb.append(StringPool.PERIOD);
sb.append(extension);
}
return sb.toString();
}
@Override
public File createTempFolder() throws IOException {
File file = new File(createTempFileName());
mkdirs(file);
return file;
}
@Override
public String decodeSafeFileName(String fileName) {
return StringUtil.replace(
fileName, _SAFE_FILE_NAME_2, _SAFE_FILE_NAME_1);
}
@Override
public boolean delete(File file) {
if (file != null) {
boolean exists = true;
try {
exists = file.exists();
}
catch (SecurityException se) {
// We may have the permission to delete a specific file without
// having the permission to check if the file exists
}
if (exists) {
return file.delete();
}
}
return false;
}
@Override
public boolean delete(String file) {
return delete(new File(file));
}
@Override
public void deltree(File directory) {
if (directory.exists() && directory.isDirectory()) {
File[] fileArray = directory.listFiles();
for (int i = 0; i < fileArray.length; i++) {
if (fileArray[i].isDirectory()) {
deltree(fileArray[i]);
}
else {
fileArray[i].delete();
}
}
directory.delete();
}
}
@Override
public void deltree(String directory) {
deltree(new File(directory));
}
@Override
public String encodeSafeFileName(String fileName) {
if (fileName == null) {
return StringPool.BLANK;
}
return StringUtil.replace(
fileName, _SAFE_FILE_NAME_1, _SAFE_FILE_NAME_2);
}
@Override
public boolean exists(File file) {
return file.exists();
}
@Override
public boolean exists(String fileName) {
return exists(new File(fileName));
}
@Override
public String extractText(InputStream is, String fileName) {
return extractText(is, fileName, -1);
}
@Override
public String extractText(
InputStream is, String fileName, int maxStringLength) {
if (maxStringLength == 0) {
return StringPool.BLANK;
}
String text = null;
try {
Tika tika = new Tika(TikaConfigHolder._tikaConfig);
tika.setMaxStringLength(maxStringLength);
boolean forkProcess = false;
if (PropsValues.TEXT_EXTRACTION_FORK_PROCESS_ENABLED) {
String mimeType = tika.detect(is);
if (ArrayUtil.contains(
PropsValues.TEXT_EXTRACTION_FORK_PROCESS_MIME_TYPES,
mimeType)) {
forkProcess = true;
}
}
if (forkProcess) {
ProcessChannel<String> processChannel =
ProcessExecutorUtil.execute(
ClassPathUtil.getPortalProcessConfig(),
new ExtractTextProcessCallable(getBytes(is)));
Future<String> future =
processChannel.getProcessNoticeableFuture();
text = future.get();
}
else {
TikaInputStream tikaInputStream = TikaInputStream.get(is);
UniversalEncodingDetector universalEncodingDetector =
new UniversalEncodingDetector();
Metadata metadata = new Metadata();
Charset charset = universalEncodingDetector.detect(
tikaInputStream, metadata);
String contentEncoding = StringPool.BLANK;
if (charset != null) {
contentEncoding = charset.name();
}
if (!contentEncoding.equals(StringPool.BLANK)) {
metadata.set("Content-Encoding", contentEncoding);
metadata.set(
"Content-Type",
"text/plain; charset=" + contentEncoding);
}
text = tika.parseToString(tikaInputStream, metadata);
}
}
catch (Throwable t) {
Throwable throwable = ExceptionUtils.getRootCause(t);
if (throwable instanceof EncryptedDocumentException ||
throwable instanceof UnsupportedZipFeatureException) {
if (_log.isWarnEnabled()) {
_log.warn(
"Unable to extract text from an encrypted file " +
fileName,
t);
}
}
else if (t instanceof TikaException) {
if (_log.isWarnEnabled()) {
_log.warn("Unable to extract text from " + fileName, t);
}
}
else {
_log.error(t, t);
}
}
if (_log.isInfoEnabled()) {
if (text == null) {
_log.info("Text extraction failed for " + fileName);
}
else {
_log.info("Text was extracted for " + fileName);
}
}
if (_log.isDebugEnabled()) {
_log.debug("Extractor returned text:\n\n" + text);
}
if (text == null) {
text = StringPool.BLANK;
}
return text;
}
@Override
public String[] find(String directory, String includes, String excludes) {
if (directory.length() > 0) {
directory = replaceSeparator(directory);
if (directory.charAt(directory.length() - 1) == CharPool.SLASH) {
directory = directory.substring(0, directory.length() - 1);
}
}
if (!exists(directory)) {
if (_log.isWarnEnabled()) {
_log.warn("Directory " + directory + " does not exist");
}
return new String[0];
}
DirectoryScanner directoryScanner = new DirectoryScanner();
directoryScanner.setBasedir(directory);
directoryScanner.setExcludes(StringUtil.split(excludes));
directoryScanner.setIncludes(StringUtil.split(includes));
directoryScanner.scan();
String[] includedFiles = directoryScanner.getIncludedFiles();
for (int i = 0; i < includedFiles.length; i++) {
includedFiles[i] = directory.concat(
StringPool.SLASH).concat(replaceSeparator(includedFiles[i]));
}
return includedFiles;
}
@Override
public String getAbsolutePath(File file) {
return StringUtil.replace(
file.getAbsolutePath(), CharPool.BACK_SLASH, CharPool.SLASH);
}
@Override
public byte[] getBytes(Class<?> clazz, String fileName) throws IOException {
return getBytes(clazz.getResourceAsStream(fileName));
}
@Override
public byte[] getBytes(File file) throws IOException {
if ((file == null) || !file.exists()) {
return null;
}
try (RandomAccessFile randomAccessFile = new RandomAccessFile(
file, "r")) {
byte[] bytes = new byte[(int)randomAccessFile.length()];
randomAccessFile.readFully(bytes);
return bytes;
}
}
@Override
public byte[] getBytes(InputStream is) throws IOException {
return getBytes(is, -1);
}
@Override
public byte[] getBytes(InputStream inputStream, int bufferSize)
throws IOException {
return getBytes(inputStream, bufferSize, true);
}
@Override
public byte[] getBytes(
InputStream inputStream, int bufferSize, boolean cleanUpStream)
throws IOException {
if (inputStream == null) {
return null;
}
UnsyncByteArrayOutputStream unsyncByteArrayOutputStream =
new UnsyncByteArrayOutputStream();
StreamUtil.transfer(
inputStream, unsyncByteArrayOutputStream, bufferSize,
cleanUpStream);
return unsyncByteArrayOutputStream.toByteArray();
}
@Override
public String getExtension(String fileName) {
if (fileName == null) {
return null;
}
int pos = fileName.lastIndexOf(CharPool.PERIOD);
if (pos > 0) {
return StringUtil.toLowerCase(
fileName.substring(pos + 1, fileName.length()));
}
else {
return StringPool.BLANK;
}
}
@Override
public String getMD5Checksum(File file) throws IOException {
FileInputStream fileInputStream = null;
try {
fileInputStream = new FileInputStream(file);
return DigesterUtil.digestHex(Digester.MD5, fileInputStream);
}
finally {
StreamUtil.cleanUp(fileInputStream);
}
}
@Override
public String getPath(String fullFileName) {
int x = fullFileName.lastIndexOf(CharPool.SLASH);
int y = fullFileName.lastIndexOf(CharPool.BACK_SLASH);
if ((x == -1) && (y == -1)) {
return StringPool.SLASH;
}
String shortFileName = fullFileName.substring(0, Math.max(x, y));
return shortFileName;
}
@Override
public String getShortFileName(String fullFileName) {
int x = fullFileName.lastIndexOf(CharPool.SLASH);
int y = fullFileName.lastIndexOf(CharPool.BACK_SLASH);
String shortFileName = fullFileName.substring(Math.max(x, y) + 1);
return shortFileName;
}
@Override
public boolean isAscii(File file) throws IOException {
boolean ascii = true;
nsDetector detector = new nsDetector(nsPSMDetector.ALL);
try (InputStream inputStream = new FileInputStream(file)) {
byte[] buffer = new byte[1024];
int len = 0;
while ((len = inputStream.read(buffer, 0, buffer.length)) != -1) {
if (ascii) {
ascii = detector.isAscii(buffer, len);
if (!ascii) {
break;
}
}
}
detector.DataEnd();
}
return ascii;
}
@Override
public boolean isSameContent(File file, byte[] bytes, int length) {
FileChannel fileChannel = null;
try {
FileInputStream fileInputStream = new FileInputStream(file);
fileChannel = fileInputStream.getChannel();
if (fileChannel.size() != length) {
return false;
}
byte[] buffer = new byte[1024];
ByteBuffer byteBuffer = ByteBuffer.wrap(buffer);
int bufferIndex = 0;
int bufferLength = -1;
while (((bufferLength = fileChannel.read(byteBuffer)) > 0) &&
(bufferIndex < length)) {
for (int i = 0; i < bufferLength; i++) {
if (buffer[i] != bytes[bufferIndex++]) {
return false;
}
}
byteBuffer.clear();
}
if ((bufferIndex != length) || (bufferLength != -1)) {
return false;
}
else {
return true;
}
}
catch (Exception e) {
return false;
}
finally {
if (fileChannel != null) {
try {
fileChannel.close();
}
catch (IOException ioe) {
}
}
}
}
@Override
public boolean isSameContent(File file, String s) {
ByteBuffer byteBuffer = CharsetEncoderUtil.encode(StringPool.UTF8, s);
return isSameContent(file, byteBuffer.array(), byteBuffer.limit());
}
@Override
public String[] listDirs(File file) {
List<String> dirs = new ArrayList<>();
File[] fileArray = file.listFiles();
for (int i = 0; (fileArray != null) && (i < fileArray.length); i++) {
if (fileArray[i].isDirectory()) {
dirs.add(fileArray[i].getName());
}
}
return dirs.toArray(new String[dirs.size()]);
}
@Override
public String[] listDirs(String fileName) {
return listDirs(new File(fileName));
}
@Override
public String[] listFiles(File file) {
List<String> files = new ArrayList<>();
File[] fileArray = file.listFiles();
for (int i = 0; (fileArray != null) && (i < fileArray.length); i++) {
if (fileArray[i].isFile()) {
files.add(fileArray[i].getName());
}
}
return files.toArray(new String[files.size()]);
}
@Override
public String[] listFiles(String fileName) {
if (Validator.isNull(fileName)) {
return new String[0];
}
return listFiles(new File(fileName));
}
@Override
public void mkdirs(File file) throws IOException {
FileUtils.forceMkdir(file);
}
@Override
public void mkdirs(String pathName) {
File file = new File(pathName);
if (file.exists() && file.isDirectory()) {
if (_log.isDebugEnabled()) {
_log.debug("Directory " + pathName + " already exists");
}
return;
}
try {
mkdirs(file);
}
catch (IOException ioe) {
ReflectionUtil.throwException(ioe);
}
}
@Override
public boolean move(File source, File destination) {
if (!source.exists()) {
return false;
}
destination.delete();
try {
if (source.isDirectory()) {
FileUtils.moveDirectory(source, destination);
}
else {
FileUtils.moveFile(source, destination);
}
}
catch (IOException ioe) {
return false;
}
return true;
}
@Override
public boolean move(String sourceFileName, String destinationFileName) {
return move(new File(sourceFileName), new File(destinationFileName));
}
@Override
public String read(File file) throws IOException {
return read(file, false);
}
@Override
public String read(File file, boolean raw) throws IOException {
byte[] bytes = getBytes(file);
if (bytes == null) {
return null;
}
String s = new String(bytes, StringPool.UTF8);
if (raw) {
return s;
}
else {
return StringUtil.replace(
s, StringPool.RETURN_NEW_LINE, StringPool.NEW_LINE);
}
}
@Override
public String read(String fileName) throws IOException {
return read(new File(fileName));
}
@Override
public String replaceSeparator(String fileName) {
return StringUtil.replace(
fileName, CharPool.BACK_SLASH, CharPool.SLASH);
}
@Override
public File[] sortFiles(File[] files) {
if (files == null) {
return null;
}
Arrays.sort(files, new FileComparator());
List<File> directoryList = new ArrayList<>();
List<File> fileList = new ArrayList<>();
for (int i = 0; i < files.length; i++) {
if (files[i].isDirectory()) {
directoryList.add(files[i]);
}
else {
fileList.add(files[i]);
}
}
directoryList.addAll(fileList);
return directoryList.toArray(new File[directoryList.size()]);
}
@Override
public String stripExtension(String fileName) {
if (fileName == null) {
return null;
}
String ext = getExtension(fileName);
if (ext.length() > 0) {
return fileName.substring(0, fileName.length() - ext.length() - 1);
}
else {
return fileName;
}
}
@Override
public String stripParentheticalSuffix(String fileName) {
StringBundler sb = new StringBundler(3);
String fileNameWithoutExtension = stripExtension(fileName);
sb.append(
StringUtil.stripParentheticalSuffix(fileNameWithoutExtension));
sb.append(StringPool.PERIOD);
String extension = getExtension(fileName);
sb.append(extension);
return sb.toString();
}
@Override
public List<String> toList(Reader reader) {
List<String> list = new ArrayList<>();
try (UnsyncBufferedReader unsyncBufferedReader =
new UnsyncBufferedReader(reader)) {
String line = null;
while ((line = unsyncBufferedReader.readLine()) != null) {
list.add(line);
}
}
catch (IOException ioe) {
}
return list;
}
@Override
public List<String> toList(String fileName) {
try {
return toList(new FileReader(fileName));
}
catch (IOException ioe) {
return new ArrayList<>();
}
}
@Override
public Properties toProperties(FileInputStream fis) {
Properties properties = new Properties();
try {
properties.load(fis);
}
catch (IOException ioe) {
}
return properties;
}
@Override
public Properties toProperties(String fileName) {
try {
return toProperties(new FileInputStream(fileName));
}
catch (IOException ioe) {
return new Properties();
}
}
@Override
public void touch(File file) throws IOException {
FileUtils.touch(file);
}
@Override
public void touch(String fileName) throws IOException {
touch(new File(fileName));
}
@Override
public void unzip(File source, File destination) {
ExpandTask.expand(source, destination);
}
@Override
public void write(File file, byte[] bytes) throws IOException {
write(file, bytes, 0, bytes.length, false);
}
@Override
public void write(File file, byte[] bytes, boolean append)
throws IOException {
write(file, bytes, 0, bytes.length, append);
}
@Override
public void write(File file, byte[] bytes, int offset, int length)
throws IOException {
write(file, bytes, offset, bytes.length, false);
}
@Override
public void write(
File file, byte[] bytes, int offset, int length, boolean append)
throws IOException {
mkdirsParentFile(file);
try (FileOutputStream fileOutputStream = new FileOutputStream(
file, append)) {
fileOutputStream.write(bytes, offset, length);
}
}
@Override
public void write(File file, InputStream is) throws IOException {
mkdirsParentFile(file);
StreamUtil.transfer(is, new FileOutputStream(file));
}
@Override
public void write(File file, String s) throws IOException {
write(file, s, false);
}
@Override
public void write(File file, String s, boolean lazy) throws IOException {
write(file, s, lazy, false);
}
@Override
public void write(File file, String s, boolean lazy, boolean append)
throws IOException {
if (s == null) {
return;
}
mkdirsParentFile(file);
if (lazy && file.exists()) {
String content = read(file);
if (content.equals(s)) {
return;
}
}
try (Writer writer = new OutputStreamWriter(
new FileOutputStream(file, append), StringPool.UTF8)) {
writer.write(s);
}
}
@Override
public void write(String fileName, byte[] bytes) throws IOException {
write(new File(fileName), bytes);
}
@Override
public void write(String fileName, InputStream is) throws IOException {
write(new File(fileName), is);
}
@Override
public void write(String fileName, String s) throws IOException {
write(new File(fileName), s);
}
@Override
public void write(String fileName, String s, boolean lazy)
throws IOException {
write(new File(fileName), s, lazy);
}
@Override
public void write(String fileName, String s, boolean lazy, boolean append)
throws IOException {
write(new File(fileName), s, lazy, append);
}
@Override
public void write(String pathName, String fileName, String s)
throws IOException {
write(new File(pathName, fileName), s);
}
@Override
public void write(String pathName, String fileName, String s, boolean lazy)
throws IOException {
write(new File(pathName, fileName), s, lazy);
}
@Override
public void write(
String pathName, String fileName, String s, boolean lazy,
boolean append)
throws IOException {
write(new File(pathName, fileName), s, lazy, append);
}
protected void mkdirsParentFile(File file) throws IOException {
File parentFile = file.getParentFile();
if (parentFile == null) {
return;
}
try {
mkdirs(parentFile);
}
catch (SecurityException se) {
// We may have the permission to write a specific file without
// having the permission to check if the parent file exists
}
}
private static final String[] _SAFE_FILE_NAME_1 = {
StringPool.AMPERSAND, StringPool.CLOSE_PARENTHESIS,
StringPool.OPEN_PARENTHESIS, StringPool.SEMICOLON
};
private static final String[] _SAFE_FILE_NAME_2 = {
PropsValues.DL_STORE_FILE_IMPL_SAFE_FILE_NAME_2_AMPERSAND,
PropsValues.DL_STORE_FILE_IMPL_SAFE_FILE_NAME_2_CLOSE_PARENTHESIS,
PropsValues.DL_STORE_FILE_IMPL_SAFE_FILE_NAME_2_OPEN_PARENTHESIS,
PropsValues.DL_STORE_FILE_IMPL_SAFE_FILE_NAME_2_SEMICOLON
};
private static final Log _log = LogFactoryUtil.getLog(FileImpl.class);
private static final FileImpl _instance = new FileImpl();
private static class ExtractTextProcessCallable
implements ProcessCallable<String> {
public ExtractTextProcessCallable(byte[] data) {
_data = data;
}
@Override
public String call() throws ProcessException {
Tika tika = new Tika(TikaConfigHolder._tikaConfig);
try {
return tika.parseToString(
new UnsyncByteArrayInputStream(_data));
}
catch (Exception e) {
throw new ProcessException(e);
}
}
private static final long serialVersionUID = 1L;
private final byte[] _data;
}
private static class TikaConfigHolder {
private static final TikaConfig _tikaConfig;
static {
try {
_tikaConfig = new TikaConfig();
}
catch (Exception e) {
throw new ExceptionInInitializerError(e);
}
}
}
}