@Override
public byte[] readAsBinary(String appWorkSpace, String filePath, int start, int end)
throws FileNotFoundException, IOException, XInvalidModificationException {
File file = new File(appWorkSpace, filePath);
if (!XFileUtils.isFileAncestorOf(appWorkSpace, file.getCanonicalPath())) {
throw new XInvalidModificationException(INVALID_MODIFICATION_EXCEPTION_NOT_IN_ROOT_DIR);
}
/** 要读取的文件长度 */
long length = file.length();
byte[] bytes = new byte[DEFAULT_READ_SIZE];
InputStream inputStream = new FileInputStream(file.getAbsolutePath());
BufferedInputStream bis = new BufferedInputStream(inputStream, DEFAULT_BUFFER_SIZE);
ByteArrayOutputStream bos = new ByteArrayOutputStream();
length = getFileSliceLength(start, end, file.length());
int numRead = 0;
long abosoluteStart = getAbosolutePosition(start, file.length());
if (abosoluteStart > 0) {
bis.skip(abosoluteStart);
}
while (length > 0
&& (numRead = bis.read(bytes, 0, (int) Math.min(DEFAULT_READ_SIZE, length))) >= 0) {
length -= numRead;
bos.write(bytes, 0, numRead);
}
byte[] content = bos.toByteArray();
inputStream.close();
bis.close();
bos.close();
return content;
}
@Override
public long truncateFile(String appWorkSpace, String filePath, long size)
throws FileNotFoundException, IOException, XInvalidModificationException {
File file = new File(appWorkSpace, filePath);
if (!XFileUtils.isFileAncestorOf(appWorkSpace, file.getCanonicalPath())) {
throw new XInvalidModificationException(INVALID_MODIFICATION_EXCEPTION_NOT_IN_ROOT_DIR);
}
return XFileUtils.truncateFile(file.getAbsolutePath(), size);
}
@Override
public File transferTo(
String appWorkSpace, String oldPath, String newPath, String newName, boolean move)
throws XNoModificationAllowedException, IOException, XInvalidModificationException,
XEncodingException {
if (null != newName && newName.contains(":")) {
throw new XEncodingException(ENCODING_EXCEPTION_NAME_CONTAINS_COLON);
}
File source = new File(appWorkSpace, oldPath);
if (!source.exists()) {
throw new FileNotFoundException(FILE_NOTFOUND_EXCEPTION_PATH_NOT_EXISTS);
}
File destinationDir = new File(appWorkSpace, newPath);
if (!destinationDir.exists()) {
throw new FileNotFoundException(FILE_NOTFOUND_EXCEPTION_PATH_NOT_EXISTS);
}
if (!XFileUtils.isFileAncestorOf(appWorkSpace, source.getCanonicalPath())
|| !XFileUtils.isFileAncestorOf(appWorkSpace, destinationDir.getCanonicalPath())) {
throw new XInvalidModificationException(INVALID_MODIFICATION_EXCEPTION_NOT_IN_ROOT_DIR);
}
File destination = createDestination(newName, source, destinationDir);
if (source.getAbsolutePath().equals(destination.getAbsolutePath())) {
throw new XInvalidModificationException(INVALID_MODIFICATION_EXCEPTION_COPY_ERROR);
}
if (source.isDirectory()) {
if (move) {
return moveDirectory(source, destination);
} else {
return copyDirectory(source, destination);
}
} else {
if (move) {
return moveFile(source, destination);
} else {
return copyFile(source, destination);
}
}
}
@Override
public boolean removeRecursively(String appWorkSpace, String filePath)
throws IOException, XInvalidModificationException {
File file = new File(appWorkSpace, filePath);
if (!XFileUtils.isFileAncestorOf(appWorkSpace, file.getCanonicalPath())) {
throw new XInvalidModificationException(INVALID_MODIFICATION_EXCEPTION_NOT_IN_ROOT_DIR);
}
if (isRootDirectory(appWorkSpace, file.getAbsolutePath())) {
return false;
}
return XFileUtils.deleteFileRecursively(file.getAbsolutePath());
}
@Override
public String getParentPath(String appWorkSpace, String filePath)
throws IOException, XInvalidModificationException {
File file = new File(appWorkSpace, filePath);
if (!XFileUtils.isFileAncestorOf(appWorkSpace, file.getCanonicalPath())) {
throw new XInvalidModificationException(INVALID_MODIFICATION_EXCEPTION_NOT_IN_ROOT_DIR);
}
if (isRootDirectory(appWorkSpace, file.getAbsolutePath())) {
return appWorkSpace;
}
filePath = file.getParent();
return filePath;
}
@Override
public File getFileObject(
String appWorkSpace,
String dirPath,
String fileName,
boolean create,
boolean exclusive,
boolean directory)
throws XFileExistsException, IOException, XTypeMismatchException, XEncodingException,
XInvalidModificationException {
if (fileName.contains(":")) {
throw new XEncodingException(ENCODING_EXCEPTION_NAME_CONTAINS_COLON);
}
File fp = new File(appWorkSpace, dirPath);
File file = null;
if (fileName.startsWith(File.separator)) {
// 当传进来的文件名是以"/"开头时，在unix下认为是根路径开始
file = new File(appWorkSpace, fileName);
} else {
file = new File(fp, fileName);
}
if (!XFileUtils.isFileAncestorOf(appWorkSpace, file.getCanonicalPath())) {
throw new XInvalidModificationException(INVALID_MODIFICATION_EXCEPTION_NOT_IN_ROOT_DIR);
}
if (create) {
if (exclusive && file.exists()) {
throw new XFileExistsException(FILE_EXISTS_EXCEPTION_CREATE_OR_EXCLUSIVE_FAILS);
}
if (directory) {
file.mkdir();
} else {
file.createNewFile();
}
if (!file.exists()) {
throw new XFileExistsException(FILE_EXISTS_EXCEPTION_CREATE_FAILS);
}
} else {
if (!file.exists()) {
throw new FileNotFoundException(FILE_NOTFOUND_EXCEPTION_PATH_NOT_EXISTS);
}
if (directory) {
if (file.isFile()) {
throw new XTypeMismatchException(TYPE_MISMATCH_EXCEPTION_PATH_NOT_EXISTS_OR_IS_FILE);
}
} else if (file.isDirectory()) {
throw new XTypeMismatchException(TYPE_MISMATCH_EXCEPTION_PATH_NOT_EXISTS_OR_IS_DIR);
}
}
return file;
}
@Override
public long getMetadata(String appWorkSpace, String filePath)
throws FileNotFoundException, IOException, XInvalidModificationException {
File file = new File(appWorkSpace, filePath);
if (!XFileUtils.isFileAncestorOf(appWorkSpace, file.getCanonicalPath())) {
throw new XInvalidModificationException(INVALID_MODIFICATION_EXCEPTION_NOT_IN_ROOT_DIR);
}
if (!file.exists()) {
throw new FileNotFoundException(FILE_NOTFOUND_EXCEPTION_PATH_NOT_EXISTS);
}
return file.lastModified();
}
@Override
public File[] getFileEntries(String appWorkSpace, String filePath)
throws FileNotFoundException, IOException, XInvalidModificationException {
File file = new File(appWorkSpace, filePath);
if (!XFileUtils.isFileAncestorOf(appWorkSpace, file.getCanonicalPath())) {
throw new XInvalidModificationException(INVALID_MODIFICATION_EXCEPTION_NOT_IN_ROOT_DIR);
}
if (!file.exists()) {
throw new FileNotFoundException();
}
if (file.isDirectory()) {
File[] files = file.listFiles();
return files;
}
return null;
}
@Override
public boolean remove(String appWorkSpace, String filePath)
throws IOException, XNoModificationAllowedException, XInvalidModificationException {
File file = new File(appWorkSpace, filePath);
if (!XFileUtils.isFileAncestorOf(appWorkSpace, file.getCanonicalPath())) {
throw new XInvalidModificationException(INVALID_MODIFICATION_EXCEPTION_NOT_IN_ROOT_DIR);
}
// 不能删除根目录.
if (isRootDirectory(appWorkSpace, file.getAbsolutePath())) {
throw new XNoModificationAllowedException(INVALID_MODIFICATION_EXCEPTION_DELETE_ROOT_DIR_ERR);
}
// 不能删除不为空的文件夹
if (file.isDirectory() && file.list().length > 0) {
throw new XInvalidModificationException(INVALID_MODIFICATION_EXCEPTION_DIR_IS_NOT_EMPTY);
}
return file.delete();
}