Package ej.wasi.io.file

Class WasiFileStub

java.lang.Object

ej.wasi.io.file.WasiFileStub

All Implemented Interfaces:

WasiFile, ReadableIO, WasiIO, WritableIO, WasiConstants, Closeable, AutoCloseable

public class WasiFileStub
extends Object
implements WasiFile

Field Summary

Fields inherited from interface ej.wasi.WasiConstants

AF_INET, AF_INET6, BLOCKING_CONNECT_TIMEOUT, BUFFERED_INPUT_STREAM_SIZE, CLOCK_MONOTONIC, CLOCK_REALTIME, DIRENT_COOKIE_OFFSET, DIRENT_ENTRY_NAME_LENGTH_OFFSET, DIRENT_FILE_TYPE_OFFSET, DIRENT_INODE_OFFSET, DIRENT_SIZE, ERRNO_ACCES, ERRNO_ADDRINUSE, ERRNO_ADDRNOTAVAIL, ERRNO_AFNOSUPPORT, ERRNO_AGAIN, ERRNO_BADF, ERRNO_CONNREFUSED, ERRNO_EXIST, ERRNO_FAULT, ERRNO_HOSTUNREACH, ERRNO_INPROGRESS, ERRNO_INTR, ERRNO_INVAL, ERRNO_IO, ERRNO_ISCONN, ERRNO_ISDIR, ERRNO_MSGSIZE, ERRNO_NAMETOOLONG, ERRNO_NOENT, ERRNO_NOMEM, ERRNO_NOSYS, ERRNO_NOTCONN, ERRNO_NOTDIR, ERRNO_NOTEMPTY, ERRNO_NOTSOCK, ERRNO_NOTSUP, ERRNO_OVERFLOW, ERRNO_SPIPE, ERRNO_SUCCESS, EVENT_AVAILABLE_BYTE_OFFSET, EVENT_ERROR_OFFSET, EVENT_EVENT_TYPE_OFFSET, EVENT_READ_WRITE_HANGUP_OFFSET, EVENT_SIZE, EVENT_USER_DATA_OFFSET, FDFLAGS_APPEND_MASK, FDFLAGS_NON_BLOCK_MASK, FDSTAT_BASE_RIGHTS_OFFSET, FDSTAT_FILE_TYPE_OFFSET, FDSTAT_FLAGS_OFFSET, FDSTAT_INHERITING_RIGHTS_OFFSET, FILESTAT_FILESIZE_OFFSET, FILESTAT_FILETYPE_OFFSET, FILESTAT_INODE_OFFSET, FILESTAT_LAST_MODIFIED_TIME_OFFSET, IFF_LOOPBACK, IFF_RUNNING, IFF_UP, IOVEC_BUFFER_INDEX, IOVEC_BUFFER_LENGTH_INDEX, IOVEC_SIZE, IP_ADD_MEMBERSHIP, IP_DROP_MEMBERSHIP, IP_MULTICAST_IF, IP_MULTICAST_LOOP, IP_MULTICAST_TTL, IP_TTL, IPPROTO_IP, IPPROTO_IPV6, IPv4AddressSize, IPV6_JOIN_GROUP, IPV6_LEAVE_GROUP, IPV6_MULTICAST_HOPS, IPV6_MULTICAST_IF, IPV6_MULTICAST_LOOP, IPV6_UNICAST_HOPS, IPv6AddressSize, LOOKUPFLAGS_SYMLINK_FOLLOW_MASK, MILLIS_TO_NANO, NON_BLOCKING_TIMEOUT, OFLAGS_CREAT_MASK, OFLAGS_DIRECTORY_MASK, OFLAGS_EXCL_MASK, OFLAGS_TRUNC_MASK, POLLING_TIMEOUT, PREOPENTYPE_DIR, PREOPENTYPE_UNKNOWN, PRESTAT_PREOPEN_DIRNAME_OFFSET, PRESTAT_PREOPEN_TAG_OFFSET, RIFLAGS_MSG_PEEK_MASK, RIFLAGS_WAITALL_MASK, RIGHTS_ALL, RIGHTS_DIR, SDFLAGS_READ, SDFLAGS_WRITE, SO_BROADCAST, SO_RCVBUF, SO_REUSEADDR, SO_SNDBUF, SOCK_CLOEXEC, SOCK_NONBLOCK, SOCKET_LEVEL, UDP_PEEK_BUFFER_MAX_SIZE

Fields inherited from interface ej.wasi.io.file.WasiFile

CUR, END, SET

Constructor Summary

Constructors

Constructor	Description
WasiFileStub()

Method Summary

Modifier and Type	Method	Description
int	available()	Returns an estimate of the number of bytes that can be read from this input stream without blocking by the next read method invocation.
void	close()	Closes this stream and releases any system resources associated with it.
void	delete()
String	getCanonicalPath()
FileType	getType()	Gets the WasiIO file descriptor type.
long	lastModidied()
long	length()
int	read(byte[] buffer, int offset, int length)	Reads length bytes of data from this WasiIO into an array of bytes.
void	renameTo(WasiFile newFile)
long	seek(long offset, int whence)
void	setNonBlocking(boolean on)	Sets this WasiIO in non blocking state.
long	tell()
void	wasiSetLength(long length)	Sets the length of a file.
void	write(byte[] buffer, int offset, int length)	Writes length bytes from t he specified byte array starting at offset offset to this WasiIO.

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

WasiFileStub

public WasiFileStub()

Method Detail

read

public int read(byte[] buffer,
                int offset,
                int length)
         throws IOException

Description copied from interface: ReadableIO

Reads length bytes of data from this WasiIO into an array of bytes.

Specified by:

read in interface ReadableIO

Parameters:

buffer - the buffer into which the data is read.

offset - the start offset in array b at which the data is written.

length - the maximum number of bytes to read.

Returns:

the total number of bytes read into the buffer or -1 if there is no more data.

Throws:

IOException - if an I/O error occurs.

available

public int available()
              throws IOException

Description copied from interface: ReadableIO

Returns an estimate of the number of bytes that can be read from this input stream without blocking by the next read method invocation.

Specified by:

available in interface ReadableIO

Returns:

an estimate of the number of bytes that can be read from this input stream without blocking or 0 when it reaches the end of this WasiIO.

Throws:

IOException - if an I/O error occurs.

setNonBlocking

public void setNonBlocking(boolean on)
                    throws IOException

Description copied from interface: ReadableIO

Sets this WasiIO in non blocking state.

Specified by:

setNonBlocking in interface ReadableIO

Parameters:

on - whether to enable or disable the non blocking option.

Throws:

IOException - if an I/O error occurs.

getType

public FileType getType()

Description copied from interface: WasiIO

Gets the WasiIO file descriptor type.

Specified by:

getType in interface WasiIO

Returns:

the WasiIO file descriptor type.

close

public void close()
           throws IOException

Description copied from interface: Closeable

Closes this stream and releases any system resources associated with it. If the stream is already closed then invoking this method has no effect.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Throws:

IOException - if an I/O error occurs

write

public void write(byte[] buffer,
                  int offset,
                  int length)
           throws IOException

Description copied from interface: WritableIO

Writes length bytes from t he specified byte array starting at offset offset to this WasiIO.

Specified by:

write in interface WritableIO

Parameters:

buffer - the data to write.

offset - the starting offset.

length - the number of bytes to write.

Throws:

IOException - if an I/O error occurs.

seek

public long seek(long offset,
                 int whence)
          throws IOException

Specified by:

seek in interface WasiFile

Throws:

IOException

tell

public long tell()
          throws IOException

Specified by:

tell in interface WasiFile

Throws:

IOException

wasiSetLength

public void wasiSetLength(long length)
                   throws IOException

Description copied from interface: WasiFile

Sets the length of a file. If file is shortened, the data is lost, if file is grown, the new data is filled with zeros.

Specified by:

wasiSetLength in interface WasiFile

Parameters:

length - The new length to set for the file.

Throws:

IOException - If an io error occurs

lastModidied

public long lastModidied()

Specified by:

lastModidied in interface WasiFile

length

public long length()

Specified by:

length in interface WasiFile

getCanonicalPath

public String getCanonicalPath()
                        throws WasiIOException

Specified by:

getCanonicalPath in interface WasiFile

Throws:

WasiIOException

renameTo

public void renameTo(WasiFile newFile)
              throws WasiIOException

Specified by:

renameTo in interface WasiFile

Throws:

WasiIOException

delete

public void delete()
            throws WasiIOException

Specified by:

delete in interface WasiFile

Throws:

WasiIOException