Netty/Codec 4.1.107.Final · io.netty.handler.codec.serialization.ObjectDecoderInputStream

Modifier and Type	Field and Description
private final ClassResolver	classResolver Deprecated as a consequence of `ClassResolver` being deprecated.
private final DataInputStream	in
private final int	maxObjectSize

Access	Constructor and Description
public	ObjectDecoderInputStream(InputStream the `InputStream` where the serialized form will be read from in) Creates a new `ObjectInput`.
public	ObjectDecoderInputStream(InputStream the `InputStream` where the serialized form will be read from in, ClassLoader the `ClassLoader` which will load the class of the serialized object classLoader) Creates a new `ObjectInput`.
public	ObjectDecoderInputStream(InputStream the `InputStream` where the serialized form will be read from in, int the maximum byte length of the serialized object. if the length of the received object is greater than this value, a `StreamCorruptedException` will be raised. maxObjectSize) Creates a new `ObjectInput`.
public	ObjectDecoderInputStream(InputStream the `InputStream` where the serialized form will be read from in, ClassLoader the `ClassLoader` which will load the class of the serialized object classLoader, int the maximum byte length of the serialized object. if the length of the received object is greater than this value, a `StreamCorruptedException` will be raised. maxObjectSize) Creates a new `ObjectInput`.

Method Summary

Modifier and Type	Method and Description
public int	available() Overrides java.io.InputStream.available. Implements java.io.ObjectInput.available. Returns the number of bytes that can be read without blocking.
public void	close() Overrides java.io.InputStream.close. Implements java.io.ObjectInput.close, java.io.Closeable.close. Closes the input stream.
public void	mark(int the maximum limit of bytes that can be read before the mark position becomes invalid. readlimit) Overrides java.io.InputStream.mark. Marks the current position in this input stream.
public boolean	markSupported() Overrides java.io.InputStream.markSupported. Tests if this input stream supports the `mark` and `reset` methods.
public int	read() Implements abstract java.io.InputStream.read. Implements java.io.ObjectInput.read. Reads a byte of data.
public final int	read(byte[] the buffer into which the data is read b, int the start offset of the data off, int the maximum number of bytes read len) Overrides java.io.InputStream.read. Implements java.io.ObjectInput.read. Reads into an array of bytes.
public final int	read(byte[] the buffer into which the data is read b) Overrides java.io.InputStream.read. Implements java.io.ObjectInput.read. Reads into an array of bytes.
public final boolean	readBoolean() Implements java.io.DataInput.readBoolean. Reads one input byte and returns `true` if that byte is nonzero, `false` if that byte is zero.
public final byte	readByte() Implements java.io.DataInput.readByte. Reads and returns one input byte.
public final char	readChar() Implements java.io.DataInput.readChar. Reads two input bytes and returns a `char` value.
public final double	readDouble() Implements java.io.DataInput.readDouble. Reads eight input bytes and returns a `double` value.
public final float	readFloat() Implements java.io.DataInput.readFloat. Reads four input bytes and returns a `float` value.
public final void	readFully(byte[] the buffer into which the data is read. b, int an int specifying the offset in the data array `b`. off, int an int specifying the number of bytes to read. len) Implements java.io.DataInput.readFully. Reads `len` bytes from an input stream.
public final void	readFully(byte[] the buffer into which the data is read. b) Implements java.io.DataInput.readFully. Reads some bytes from an input stream and stores them into the buffer array `b`.
public final int	readInt() Implements java.io.DataInput.readInt. Reads four input bytes and returns an `int` value.
public final String	readLine() Implements java.io.DataInput.readLine. Deprecated Use `BufferedReader#readLine()` instead. Reads the next line of text from the input stream.
public final long	readLong() Implements java.io.DataInput.readLong. Reads eight input bytes and returns a `long` value.
public Object	readObject() Implements java.io.ObjectInput.readObject. Read and return an object.
public final short	readShort() Implements java.io.DataInput.readShort. Reads two input bytes and returns a `short` value.
public final int	readUnsignedByte() Implements java.io.DataInput.readUnsignedByte. Reads one input byte, zero-extends it to type `int`, and returns the result, which is therefore in the range `0` through `255`.
public final int	readUnsignedShort() Implements java.io.DataInput.readUnsignedShort. Reads two input bytes and returns an `int` value in the range `0` through `65535`.
public final String	readUTF() Implements java.io.DataInput.readUTF. Reads in a string that has been encoded using a modified UTF-8 format.
public void	reset() Overrides java.io.InputStream.reset. Repositions this stream to the position at the time the `mark` method was last called on this input stream.
public long	skip(long the number of bytes to be skipped n) Overrides java.io.InputStream.skip. Implements java.io.ObjectInput.skip. Skips n bytes of input.
public final int	skipBytes(int the number of bytes to be skipped. n) Implements java.io.DataInput.skipBytes. Makes an attempt to skip over `n` bytes of data from the input stream, discarding the skipped bytes.

Inherited from java.io.InputStream:: nullInputStream readAllBytes readNBytes readNBytes skipNBytes transferTo

classResolver	back to summary
private final ClassResolver classResolver Deprecated as a consequence of `ClassResolver` being deprecated. See corresponding docs for further information.

in	back to summary
private final DataInputStream in

maxObjectSize	back to summary
private final int maxObjectSize

ObjectDecoderInputStream	back to summary
public ObjectDecoderInputStream(InputStream in) Creates a new `ObjectInput`. Parameters in:InputStream the `InputStream` where the serialized form will be read from

ObjectDecoderInputStream	back to summary
public ObjectDecoderInputStream(InputStream in, ClassLoader classLoader) Creates a new `ObjectInput`. Parameters in:InputStream the `InputStream` where the serialized form will be read from classLoader:ClassLoader the `ClassLoader` which will load the class of the serialized object

ObjectDecoderInputStream	back to summary
public ObjectDecoderInputStream(InputStream in, int maxObjectSize) Creates a new `ObjectInput`. Parameters in:InputStream the `InputStream` where the serialized form will be read from maxObjectSize:int the maximum byte length of the serialized object. if the length of the received object is greater than this value, a `StreamCorruptedException` will be raised.

ObjectDecoderInputStream	back to summary
public ObjectDecoderInputStream(InputStream in, ClassLoader classLoader, int maxObjectSize) Creates a new `ObjectInput`. Parameters in:InputStream the `InputStream` where the serialized form will be read from classLoader:ClassLoader the `ClassLoader` which will load the class of the serialized object maxObjectSize:int the maximum byte length of the serialized object. if the length of the received object is greater than this value, a `StreamCorruptedException` will be raised.

Method Detail

available	back to summary
public int available() throws IOException Overrides java.io.InputStream.available. Implements java.io.ObjectInput.available. Doc from java.io.ObjectInput.available. Returns the number of bytes that can be read without blocking. Returns:int the number of available bytes. Annotations @Override Exceptions IOException: If an I/O error has occurred.

available

back to summary

public int available() throws IOException

Overrides java.io.InputStream.available.

Implements java.io.ObjectInput.available.

Doc from java.io.ObjectInput.available.

Returns the number of bytes that can be read without blocking.

Returns:int

the number of available bytes.

Annotations

@Override

Exceptions

IOException:: If an I/O error has occurred.

close	back to summary
public void close() throws IOException Overrides java.io.InputStream.close. Implements java.io.ObjectInput.close, java.io.Closeable.close. Doc from java.io.ObjectInput.close. Closes the input stream. Must be called to release any resources associated with the stream. Annotations @Override Exceptions IOException: If an I/O error has occurred.

back to summary

public void close() throws IOException

Overrides java.io.InputStream.close.

Implements java.io.ObjectInput.close, java.io.Closeable.close.

Doc from java.io.ObjectInput.close.

Closes the input stream. Must be called to release any resources associated with the stream.

Annotations

@Override

Exceptions

IOException:: If an I/O error has occurred.

mark back to summary

mark	back to summary
public void mark(int readlimit) Overrides java.io.InputStream.mark. Doc from java.io.InputStream.mark. Marks the current position in this input stream. A subsequent call to the `reset` method repositions this stream at the last marked position so that subsequent reads re-read the same bytes. The `readlimit` arguments tells this input stream to allow that many bytes to be read before the mark position gets invalidated. The general contract of `mark` is that, if the method `markSupported` returns `true`, the stream somehow remembers all the bytes read after the call to `mark` and stands ready to supply those same bytes again if and whenever the method `reset` is called. However, the stream is not required to remember any data at all if more than `readlimit` bytes are read from the stream before `reset` is called. Marking a closed stream should not have any effect on the stream. Parameters readlimit:int the maximum limit of bytes that can be read before the mark position becomes invalid. Annotations @Override

public void mark(int readlimit)

Overrides java.io.InputStream.mark.

Doc from java.io.InputStream.mark.

Marks the current position in this input stream. A subsequent call to the reset method repositions this stream at the last marked position so that subsequent reads re-read the same bytes.

The readlimit arguments tells this input stream to allow that many bytes to be read before the mark position gets invalidated.

The general contract of mark is that, if the method markSupported returns true, the stream somehow remembers all the bytes read after the call to mark and stands ready to supply those same bytes again if and whenever the method reset is called. However, the stream is not required to remember any data at all if more than readlimit bytes are read from the stream before reset is called.

Marking a closed stream should not have any effect on the stream.

Parameters

readlimit:int: the maximum limit of bytes that can be read before the mark position becomes invalid.

Annotations

@Override

markSupported back to summary

markSupported	back to summary
public boolean markSupported() Overrides java.io.InputStream.markSupported. Doc from java.io.InputStream.markSupported. Tests if this input stream supports the `mark` and `reset` methods. Whether or not `mark` and `reset` are supported is an invariant property of a particular input stream instance. Returns:boolean `true` if this stream instance supports the mark and reset methods; `false` otherwise. Annotations @Override

public boolean markSupported()

Overrides java.io.InputStream.markSupported.

Doc from java.io.InputStream.markSupported.

Tests if this input stream supports the mark and reset methods. Whether or not mark and reset are supported is an invariant property of a particular input stream instance.

Returns:boolean

true if this stream instance supports the mark and reset methods; false otherwise.

Annotations

@Override

read	back to summary
public int read() throws IOException Implements abstract java.io.InputStream.read. Implements java.io.ObjectInput.read. Doc from java.io.ObjectInput.read. Reads a byte of data. This method will block if no input is available. Returns:int the byte read, or -1 if the end of the stream is reached. Annotations @Override Exceptions IOException: If an I/O error has occurred.

read

back to summary

public int read() throws IOException

Implements abstract java.io.InputStream.read.

Implements java.io.ObjectInput.read.

Doc from java.io.ObjectInput.read.

Reads a byte of data. This method will block if no input is available.

Returns:int

the byte read, or -1 if the end of the stream is reached.

Annotations

@Override

Exceptions

IOException:: If an I/O error has occurred.

read back to summary

read	back to summary
public final int read(byte[] b, int off, int len) throws IOException Overrides java.io.InputStream.read. Implements java.io.ObjectInput.read. Doc from java.io.ObjectInput.read. Reads into an array of bytes. This method will block until some input is available. Parameters b:byte[] the buffer into which the data is read off:int the start offset of the data len:int the maximum number of bytes read Returns:int the total number of bytes read into the buffer, or `-1` if there is no more data because the end of the stream has been reached. Annotations @Override Exceptions IOException: If an I/O error has occurred.

public final int read(byte[] b, int off, int len) throws IOException

Overrides java.io.InputStream.read.

Implements java.io.ObjectInput.read.

Doc from java.io.ObjectInput.read.

Reads into an array of bytes. This method will block until some input is available.

Parameters

b:byte[]: the buffer into which the data is read
off:int: the start offset of the data
len:int: the maximum number of bytes read

Returns:int

the total number of bytes read into the buffer, or -1 if there is no more data because the end of the stream has been reached.

Annotations

@Override

Exceptions

IOException:: If an I/O error has occurred.

read back to summary

read	back to summary
public final int read(byte[] b) throws IOException Overrides java.io.InputStream.read. Implements java.io.ObjectInput.read. Doc from java.io.ObjectInput.read. Reads into an array of bytes. This method will block until some input is available. Parameters b:byte[] the buffer into which the data is read Returns:int the total number of bytes read into the buffer, or `-1` if there is no more data because the end of the stream has been reached. Annotations @Override Exceptions IOException: If an I/O error has occurred.

public final int read(byte[] b) throws IOException

Overrides java.io.InputStream.read.

Implements java.io.ObjectInput.read.

Doc from java.io.ObjectInput.read.

Reads into an array of bytes. This method will block until some input is available.

Parameters

b:byte[]: the buffer into which the data is read

Returns:int

the total number of bytes read into the buffer, or -1 if there is no more data because the end of the stream has been reached.

Annotations

@Override

Exceptions

IOException:: If an I/O error has occurred.

readBoolean back to summary

readBoolean	back to summary
public final boolean readBoolean() throws IOException Implements java.io.DataInput.readBoolean. Doc from java.io.DataInput.readBoolean. Reads one input byte and returns `true` if that byte is nonzero, `false` if that byte is zero. This method is suitable for reading the byte written by the `writeBoolean` method of interface `DataOutput`. Returns:boolean the `boolean` value read. Annotations @Override Exceptions IOException: if an I/O error occurs.

public final boolean readBoolean() throws IOException

Implements java.io.DataInput.readBoolean.

Doc from java.io.DataInput.readBoolean.

Reads one input byte and returns true if that byte is nonzero, false if that byte is zero. This method is suitable for reading the byte written by the writeBoolean method of interface DataOutput.

Returns:boolean

the boolean value read.

Annotations

@Override

Exceptions

IOException:: if an I/O error occurs.

readByte back to summary

readByte	back to summary
public final byte readByte() throws IOException Implements java.io.DataInput.readByte. Doc from java.io.DataInput.readByte. Reads and returns one input byte. The byte is treated as a signed value in the range `-128` through `127`, inclusive. This method is suitable for reading the byte written by the `writeByte` method of interface `DataOutput`. Returns:byte the 8-bit value read. Annotations @Override Exceptions IOException: if an I/O error occurs.

public final byte readByte() throws IOException

Implements java.io.DataInput.readByte.

Doc from java.io.DataInput.readByte.

Reads and returns one input byte. The byte is treated as a signed value in the range -128 through 127, inclusive. This method is suitable for reading the byte written by the writeByte method of interface DataOutput.

Returns:byte

the 8-bit value read.

Annotations

@Override

Exceptions

IOException:: if an I/O error occurs.

readChar back to summary

readChar	back to summary
public final char readChar() throws IOException Implements java.io.DataInput.readChar. Doc from java.io.DataInput.readChar. Reads two input bytes and returns a `char` value. Let `a` be the first byte read and `b` be the second byte. The value returned is: `(char)((a << 8) \| (b & 0xff))` This method is suitable for reading bytes written by the `writeChar` method of interface `DataOutput`. Returns:char the `char` value read. Annotations @Override Exceptions IOException: if an I/O error occurs.

public final char readChar() throws IOException

Implements java.io.DataInput.readChar.

Doc from java.io.DataInput.readChar.

Reads two input bytes and returns a char value. Let a be the first byte read and b be the second byte. The value returned is:

(char)((a << 8) | (b & 0xff))

This method is suitable for reading bytes written by the writeChar method of interface DataOutput.

Returns:char

the char value read.

Annotations

@Override

Exceptions

IOException:: if an I/O error occurs.

readDouble back to summary

readDouble	back to summary
public final double readDouble() throws IOException Implements java.io.DataInput.readDouble. Doc from java.io.DataInput.readDouble. Reads eight input bytes and returns a `double` value. It does this by first constructing a `long` value in exactly the manner of the `readLong` method, then converting this `long` value to a `double` in exactly the manner of the method `Double.longBitsToDouble`. This method is suitable for reading bytes written by the `writeDouble` method of interface `DataOutput`. Returns:double the `double` value read. Annotations @Override Exceptions IOException: if an I/O error occurs.

public final double readDouble() throws IOException

Implements java.io.DataInput.readDouble.

Doc from java.io.DataInput.readDouble.

Reads eight input bytes and returns a double value. It does this by first constructing a long value in exactly the manner of the readLong method, then converting this long value to a double in exactly the manner of the method Double.longBitsToDouble. This method is suitable for reading bytes written by the writeDouble method of interface DataOutput.

Returns:double

the double value read.

Annotations

@Override

Exceptions

IOException:: if an I/O error occurs.

readFloat back to summary

readFloat	back to summary
public final float readFloat() throws IOException Implements java.io.DataInput.readFloat. Doc from java.io.DataInput.readFloat. Reads four input bytes and returns a `float` value. It does this by first constructing an `int` value in exactly the manner of the `readInt` method, then converting this `int` value to a `float` in exactly the manner of the method `Float.intBitsToFloat`. This method is suitable for reading bytes written by the `writeFloat` method of interface `DataOutput`. Returns:float the `float` value read. Annotations @Override Exceptions IOException: if an I/O error occurs.

public final float readFloat() throws IOException

Implements java.io.DataInput.readFloat.

Doc from java.io.DataInput.readFloat.

Reads four input bytes and returns a float value. It does this by first constructing an int value in exactly the manner of the readInt method, then converting this int value to a float in exactly the manner of the method Float.intBitsToFloat. This method is suitable for reading bytes written by the writeFloat method of interface DataOutput.

Returns:float

the float value read.

Annotations

@Override

Exceptions

IOException:: if an I/O error occurs.

readFully back to summary

readFully	back to summary
public final void readFully(byte[] b, int off, int len) throws IOException Implements java.io.DataInput.readFully. Doc from java.io.DataInput.readFully. Reads `len` bytes from an input stream. This method blocks until one of the following conditions occurs: `len` bytes of input data are available, in which case a normal return is made. End of file is detected, in which case an `EOFException` is thrown. An I/O error occurs, in which case an `IOException` other than `EOFException` is thrown. If `b` is `null`, a `NullPointerException` is thrown. If `off` is negative, or `len` is negative, or `off+len` is greater than the length of the array `b`, then an `IndexOutOfBoundsException` is thrown. If `len` is zero, then no bytes are read. Otherwise, the first byte read is stored into element `b[off]`, the next one into `b[off+1]`, and so on. The number of bytes read is, at most, equal to `len`. Parameters b:byte[] the buffer into which the data is read. off:int an int specifying the offset in the data array `b`. len:int an int specifying the number of bytes to read. Annotations @Override Exceptions IOException: if an I/O error occurs.

public final void readFully(byte[] b, int off, int len) throws IOException

Implements java.io.DataInput.readFully.

Doc from java.io.DataInput.readFully.

Reads len bytes from an input stream.

This method blocks until one of the following conditions occurs:

len bytes of input data are available, in which case a normal return is made.
End of file is detected, in which case an EOFException is thrown.
An I/O error occurs, in which case an IOException other than EOFException is thrown.

If b is null, a NullPointerException is thrown. If off is negative, or len is negative, or off+len is greater than the length of the array b, then an IndexOutOfBoundsException is thrown. If len is zero, then no bytes are read. Otherwise, the first byte read is stored into element b[off], the next one into b[off+1], and so on. The number of bytes read is, at most, equal to len.

Parameters

b:byte[]: the buffer into which the data is read.
off:int: an int specifying the offset in the data array b.
len:int: an int specifying the number of bytes to read.

Annotations

@Override

Exceptions

IOException:: if an I/O error occurs.

readFully back to summary

readFully	back to summary
public final void readFully(byte[] b) throws IOException Implements java.io.DataInput.readFully. Doc from java.io.DataInput.readFully. Reads some bytes from an input stream and stores them into the buffer array `b`. The number of bytes read is equal to the length of `b`. This method blocks until one of the following conditions occurs: `b.length` bytes of input data are available, in which case a normal return is made. End of file is detected, in which case an `EOFException` is thrown. An I/O error occurs, in which case an `IOException` other than `EOFException` is thrown. If `b` is `null`, a `NullPointerException` is thrown. If `b.length` is zero, then no bytes are read. Otherwise, the first byte read is stored into element `b[0]`, the next one into `b[1]`, and so on. If an exception is thrown from this method, then it may be that some but not all bytes of `b` have been updated with data from the input stream. Parameters b:byte[] the buffer into which the data is read. Annotations @Override Exceptions IOException: if an I/O error occurs.

public final void readFully(byte[] b) throws IOException

Implements java.io.DataInput.readFully.

Doc from java.io.DataInput.readFully.

Reads some bytes from an input stream and stores them into the buffer array b. The number of bytes read is equal to the length of b.

This method blocks until one of the following conditions occurs:

b.length bytes of input data are available, in which case a normal return is made.
End of file is detected, in which case an EOFException is thrown.
An I/O error occurs, in which case an IOException other than EOFException is thrown.

If b is null, a NullPointerException is thrown. If b.length is zero, then no bytes are read. Otherwise, the first byte read is stored into element b[0], the next one into b[1], and so on. If an exception is thrown from this method, then it may be that some but not all bytes of b have been updated with data from the input stream.

Parameters

b:byte[]: the buffer into which the data is read.

Annotations

@Override

Exceptions

IOException:: if an I/O error occurs.

readInt back to summary

readInt	back to summary
public final int readInt() throws IOException Implements java.io.DataInput.readInt. Doc from java.io.DataInput.readInt. Reads four input bytes and returns an `int` value. Let `a-d` be the first through fourth bytes read. The value returned is: `(((a & 0xff) << 24) \| ((b & 0xff) << 16) \| ((c & 0xff) << 8) \| (d & 0xff))` This method is suitable for reading bytes written by the `writeInt` method of interface `DataOutput`. Returns:int the `int` value read. Annotations @Override Exceptions IOException: if an I/O error occurs.

public final int readInt() throws IOException

Implements java.io.DataInput.readInt.

Doc from java.io.DataInput.readInt.

Reads four input bytes and returns an int value. Let a-d be the first through fourth bytes read. The value returned is:

(((a & 0xff) << 24) | ((b & 0xff) << 16) |
 ((c & 0xff) <<  8) | (d & 0xff))

This method is suitable for reading bytes written by the writeInt method of interface DataOutput.

Returns:int

the int value read.

Annotations

@Override

Exceptions

IOException:: if an I/O error occurs.

readLine back to summary

readLine	back to summary
public final String readLine() throws IOException Implements java.io.DataInput.readLine. Doc from java.io.DataInput.readLine. Deprecated Use `BufferedReader#readLine()` instead. Reads the next line of text from the input stream. It reads successive bytes, converting each byte separately into a character, until it encounters a line terminator or end of file; the characters read are then returned as a `String`. Note that because this method processes bytes, it does not support input of the full Unicode character set. If end of file is encountered before even one byte can be read, then `null` is returned. Otherwise, each byte that is read is converted to type `char` by zero-extension. If the character `'\n'` is encountered, it is discarded and reading ceases. If the character `'\r'` is encountered, it is discarded and, if the following byte converts to the character `'\n'`, then that is discarded also; reading then ceases. If end of file is encountered before either of the characters `'\n'` and `'\r'` is encountered, reading ceases. Once reading has ceased, a `String` is returned that contains all the characters read and not discarded, taken in order. Note that every character in this string will have a value less than `\u0100`, that is, `(char)256`. Returns:String the next line of text from the input stream, or `null` if the end of file is encountered before a byte can be read. Annotations @Override @Deprecated Exceptions IOException: if an I/O error occurs.

public final String readLine() throws IOException

Implements java.io.DataInput.readLine.

Doc from java.io.DataInput.readLine.

Deprecated

Use BufferedReader#readLine() instead.

Reads the next line of text from the input stream. It reads successive bytes, converting each byte separately into a character, until it encounters a line terminator or end of file; the characters read are then returned as a String. Note that because this method processes bytes, it does not support input of the full Unicode character set.

If end of file is encountered before even one byte can be read, then null is returned. Otherwise, each byte that is read is converted to type char by zero-extension. If the character '\n' is encountered, it is discarded and reading ceases. If the character '\r' is encountered, it is discarded and, if the following byte converts to the character '\n', then that is discarded also; reading then ceases. If end of file is encountered before either of the characters '\n' and '\r' is encountered, reading ceases. Once reading has ceased, a String is returned that contains all the characters read and not discarded, taken in order. Note that every character in this string will have a value less than \u0100, that is, (char)256.

Returns:String

the next line of text from the input stream, or null if the end of file is encountered before a byte can be read.

Annotations

@Override
@Deprecated

Exceptions

IOException:: if an I/O error occurs.

readLong back to summary

readLong	back to summary
public final long readLong() throws IOException Implements java.io.DataInput.readLong. Doc from java.io.DataInput.readLong. Reads eight input bytes and returns a `long` value. Let `a-h` be the first through eighth bytes read. The value returned is: `(((long)(a & 0xff) << 56) \| ((long)(b & 0xff) << 48) \| ((long)(c & 0xff) << 40) \| ((long)(d & 0xff) << 32) \| ((long)(e & 0xff) << 24) \| ((long)(f & 0xff) << 16) \| ((long)(g & 0xff) << 8) \| ((long)(h & 0xff)))` This method is suitable for reading bytes written by the `writeLong` method of interface `DataOutput`. Returns:long the `long` value read. Annotations @Override Exceptions IOException: if an I/O error occurs.

public final long readLong() throws IOException

Implements java.io.DataInput.readLong.

Doc from java.io.DataInput.readLong.

Reads eight input bytes and returns a long value. Let a-h be the first through eighth bytes read. The value returned is:

(((long)(a & 0xff) << 56) |
 ((long)(b & 0xff) << 48) |
 ((long)(c & 0xff) << 40) |
 ((long)(d & 0xff) << 32) |
 ((long)(e & 0xff) << 24) |
 ((long)(f & 0xff) << 16) |
 ((long)(g & 0xff) <<  8) |
 ((long)(h & 0xff)))

This method is suitable for reading bytes written by the writeLong method of interface DataOutput.

Returns:long

the long value read.

Annotations

@Override

Exceptions

IOException:: if an I/O error occurs.

readObject	back to summary
public Object readObject() throws ClassNotFoundException, IOException Implements java.io.ObjectInput.readObject. Doc from java.io.ObjectInput.readObject. Read and return an object. The class that implements this interface defines where the object is "read" from. Returns:Object the object read from the stream Annotations @Override Exceptions ClassNotFoundException: If the class of a serialized object cannot be found. IOException: If any of the usual Input/Output related exceptions occur.

readObject

back to summary

public Object readObject() throws ClassNotFoundException, IOException

Implements java.io.ObjectInput.readObject.

Doc from java.io.ObjectInput.readObject.

Read and return an object. The class that implements this interface defines where the object is "read" from.

Returns:Object

the object read from the stream

Annotations

@Override

Exceptions

ClassNotFoundException:: If the class of a serialized object cannot be found.
IOException:: If any of the usual Input/Output related exceptions occur.

readShort back to summary

readShort	back to summary
public final short readShort() throws IOException Implements java.io.DataInput.readShort. Doc from java.io.DataInput.readShort. Reads two input bytes and returns a `short` value. Let `a` be the first byte read and `b` be the second byte. The value returned is: `(short)((a << 8) \| (b & 0xff))` This method is suitable for reading the bytes written by the `writeShort` method of interface `DataOutput`. Returns:short the 16-bit value read. Annotations @Override Exceptions IOException: if an I/O error occurs.

public final short readShort() throws IOException

Implements java.io.DataInput.readShort.

Doc from java.io.DataInput.readShort.

Reads two input bytes and returns a short value. Let a be the first byte read and b be the second byte. The value returned is:

(short)((a << 8) | (b & 0xff))

This method is suitable for reading the bytes written by the writeShort method of interface DataOutput.

Returns:short

the 16-bit value read.

Annotations

@Override

Exceptions

IOException:: if an I/O error occurs.

readUnsignedByte back to summary

readUnsignedByte	back to summary
public final int readUnsignedByte() throws IOException Implements java.io.DataInput.readUnsignedByte. Doc from java.io.DataInput.readUnsignedByte. Reads one input byte, zero-extends it to type `int`, and returns the result, which is therefore in the range `0` through `255`. This method is suitable for reading the byte written by the `writeByte` method of interface `DataOutput` if the argument to `writeByte` was intended to be a value in the range `0` through `255`. Returns:int the unsigned 8-bit value read. Annotations @Override Exceptions IOException: if an I/O error occurs.

public final int readUnsignedByte() throws IOException

Implements java.io.DataInput.readUnsignedByte.

Doc from java.io.DataInput.readUnsignedByte.

Reads one input byte, zero-extends it to type int, and returns the result, which is therefore in the range 0 through 255. This method is suitable for reading the byte written by the writeByte method of interface DataOutput if the argument to writeByte was intended to be a value in the range 0 through 255.

Returns:int

the unsigned 8-bit value read.

Annotations

@Override

Exceptions

IOException:: if an I/O error occurs.

readUnsignedShort back to summary

readUnsignedShort	back to summary
public final int readUnsignedShort() throws IOException Implements java.io.DataInput.readUnsignedShort. Doc from java.io.DataInput.readUnsignedShort. Reads two input bytes and returns an `int` value in the range `0` through `65535`. Let `a` be the first byte read and `b` be the second byte. The value returned is: `(((a & 0xff) << 8) \| (b & 0xff))` This method is suitable for reading the bytes written by the `writeShort` method of interface `DataOutput` if the argument to `writeShort` was intended to be a value in the range `0` through `65535`. Returns:int the unsigned 16-bit value read. Annotations @Override Exceptions IOException: if an I/O error occurs.

public final int readUnsignedShort() throws IOException

Implements java.io.DataInput.readUnsignedShort.

Doc from java.io.DataInput.readUnsignedShort.

Reads two input bytes and returns an int value in the range 0 through 65535. Let a be the first byte read and b be the second byte. The value returned is:

(((a & 0xff) << 8) | (b & 0xff))

This method is suitable for reading the bytes written by the writeShort method of interface DataOutput if the argument to writeShort was intended to be a value in the range 0 through 65535.

Returns:int

the unsigned 16-bit value read.

Annotations

@Override

Exceptions

IOException:: if an I/O error occurs.

readUTF back to summary

readUTF	back to summary
public final String readUTF() throws IOException Implements java.io.DataInput.readUTF. Doc from java.io.DataInput.readUTF. Reads in a string that has been encoded using a modified UTF-8 format. The general contract of `readUTF` is that it reads a representation of a Unicode character string encoded in modified UTF-8 format; this string of characters is then returned as a `String`. First, two bytes are read and used to construct an unsigned 16-bit integer in exactly the manner of the `readUnsignedShort` method . This integer value is called the UTF length and specifies the number of additional bytes to be read. These bytes are then converted to characters by considering them in groups. The length of each group is computed from the value of the first byte of the group. The byte following a group, if any, is the first byte of the next group. If the first byte of a group matches the bit pattern `0xxxxxxx` (where `x` means "may be `0` or `1`"), then the group consists of just that byte. The byte is zero-extended to form a character. If the first byte of a group matches the bit pattern `110xxxxx`, then the group consists of that byte `a` and a second byte `b`. If there is no byte `b` (because byte `a` was the last of the bytes to be read), or if byte `b` does not match the bit pattern `10xxxxxx`, then a `UTFDataFormatException` is thrown. Otherwise, the group is converted to the character: `(char)(((a & 0x1F) << 6) \| (b & 0x3F))` If the first byte of a group matches the bit pattern `1110xxxx`, then the group consists of that byte `a` and two more bytes `b` and `c`. If there is no byte `c` (because byte `a` was one of the last two of the bytes to be read), or either byte `b` or byte `c` does not match the bit pattern `10xxxxxx`, then a `UTFDataFormatException` is thrown. Otherwise, the group is converted to the character: `(char)(((a & 0x0F) << 12) \| ((b & 0x3F) << 6) \| (c & 0x3F))` If the first byte of a group matches the pattern `1111xxxx` or the pattern `10xxxxxx`, then a `UTFDataFormatException` is thrown. If end of file is encountered at any time during this entire process, then an `EOFException` is thrown. After every group has been converted to a character by this process, the characters are gathered, in the same order in which their corresponding groups were read from the input stream, to form a `String`, which is returned. The `writeUTF` method of interface `DataOutput` may be used to write data that is suitable for reading by this method. Returns:String a Unicode string. Annotations @Override Exceptions IOException: if an I/O error occurs.

public final String readUTF() throws IOException

Implements java.io.DataInput.readUTF.

Doc from java.io.DataInput.readUTF.

Reads in a string that has been encoded using a modified UTF-8 format. The general contract of readUTF is that it reads a representation of a Unicode character string encoded in modified UTF-8 format; this string of characters is then returned as a String.

First, two bytes are read and used to construct an unsigned 16-bit integer in exactly the manner of the readUnsignedShort method . This integer value is called the UTF length and specifies the number of additional bytes to be read. These bytes are then converted to characters by considering them in groups. The length of each group is computed from the value of the first byte of the group. The byte following a group, if any, is the first byte of the next group.

If the first byte of a group matches the bit pattern 0xxxxxxx (where x means "may be 0 or 1"), then the group consists of just that byte. The byte is zero-extended to form a character.

If the first byte of a group matches the bit pattern 110xxxxx, then the group consists of that byte a and a second byte b. If there is no byte b (because byte a was the last of the bytes to be read), or if byte b does not match the bit pattern 10xxxxxx, then a UTFDataFormatException is thrown. Otherwise, the group is converted to the character:

(char)(((a & 0x1F) << 6) | (b & 0x3F))

If the first byte of a group matches the bit pattern 1110xxxx, then the group consists of that byte a and two more bytes b and c. If there is no byte c (because byte a was one of the last two of the bytes to be read), or either byte b or byte c does not match the bit pattern 10xxxxxx, then a UTFDataFormatException is thrown. Otherwise, the group is converted to the character:

(char)(((a & 0x0F) << 12) | ((b & 0x3F) << 6) | (c & 0x3F))

If the first byte of a group matches the pattern 1111xxxx or the pattern 10xxxxxx, then a UTFDataFormatException is thrown.

If end of file is encountered at any time during this entire process, then an EOFException is thrown.

After every group has been converted to a character by this process, the characters are gathered, in the same order in which their corresponding groups were read from the input stream, to form a String, which is returned.

The writeUTF method of interface DataOutput may be used to write data that is suitable for reading by this method.

Returns:String

a Unicode string.

Annotations

@Override

Exceptions

IOException:: if an I/O error occurs.

reset back to summary

reset	back to summary
public void reset() throws IOException Overrides java.io.InputStream.reset. Doc from java.io.InputStream.reset. Repositions this stream to the position at the time the `mark` method was last called on this input stream. The general contract of `reset` is: If the method `markSupported` returns `true`, then: If the method `mark` has not been called since the stream was created, or the number of bytes read from the stream since `mark` was last called is larger than the argument to `mark` at that last call, then an `IOException` might be thrown. If such an `IOException` is not thrown, then the stream is reset to a state such that all the bytes read since the most recent call to `mark` (or since the start of the file, if `mark` has not been called) will be resupplied to subsequent callers of the `read` method, followed by any bytes that otherwise would have been the next input data as of the time of the call to `reset`. If the method `markSupported` returns `false`, then: The call to `reset` may throw an `IOException`. If an `IOException` is not thrown, then the stream is reset to a fixed state that depends on the particular type of the input stream and how it was created. The bytes that will be supplied to subsequent callers of the `read` method depend on the particular type of the input stream. Annotations @Override Exceptions IOException: if this stream has not been marked or if the mark has been invalidated.

public void reset() throws IOException

Overrides java.io.InputStream.reset.

Doc from java.io.InputStream.reset.

Repositions this stream to the position at the time the mark method was last called on this input stream.

The general contract of reset is:

If the method markSupported returns true, then:
- If the method mark has not been called since the stream was created, or the number of bytes read from the stream since mark was last called is larger than the argument to mark at that last call, then an IOException might be thrown.
- If such an IOException is not thrown, then the stream is reset to a state such that all the bytes read since the most recent call to mark (or since the start of the file, if mark has not been called) will be resupplied to subsequent callers of the read method, followed by any bytes that otherwise would have been the next input data as of the time of the call to reset.
If the method markSupported returns false, then:
- The call to reset may throw an IOException.
- If an IOException is not thrown, then the stream is reset to a fixed state that depends on the particular type of the input stream and how it was created. The bytes that will be supplied to subsequent callers of the read method depend on the particular type of the input stream.

Annotations

@Override

Exceptions

IOException:: if this stream has not been marked or if the mark has been invalidated.

skip	back to summary
public long skip(long n) throws IOException Overrides java.io.InputStream.skip. Implements java.io.ObjectInput.skip. Doc from java.io.ObjectInput.skip. Skips n bytes of input. Parameters n:long the number of bytes to be skipped Returns:long the actual number of bytes skipped. Annotations @Override Exceptions IOException: If an I/O error has occurred.

skip

back to summary

public long skip(long n) throws IOException

Overrides java.io.InputStream.skip.

Implements java.io.ObjectInput.skip.

Doc from java.io.ObjectInput.skip.

Skips n bytes of input.

Parameters

n:long: the number of bytes to be skipped

Returns:long

the actual number of bytes skipped.

Annotations

@Override

Exceptions

IOException:: If an I/O error has occurred.

skipBytes back to summary

skipBytes	back to summary
public final int skipBytes(int n) throws IOException Implements java.io.DataInput.skipBytes. Doc from java.io.DataInput.skipBytes. Makes an attempt to skip over `n` bytes of data from the input stream, discarding the skipped bytes. However, it may skip over some smaller number of bytes, possibly zero. This may result from any of a number of conditions; reaching end of file before `n` bytes have been skipped is only one possibility. This method never throws an `EOFException`. The actual number of bytes skipped is returned. Parameters n:int the number of bytes to be skipped. Returns:int the number of bytes actually skipped. Annotations @Override Exceptions IOException: if an I/O error occurs.

public final int skipBytes(int n) throws IOException

Implements java.io.DataInput.skipBytes.

Doc from java.io.DataInput.skipBytes.

Makes an attempt to skip over n bytes of data from the input stream, discarding the skipped bytes. However, it may skip over some smaller number of bytes, possibly zero. This may result from any of a number of conditions; reaching end of file before n bytes have been skipped is only one possibility. This method never throws an EOFException. The actual number of bytes skipped is returned.

Parameters

n:int: the number of bytes to be skipped.

Returns:int

the number of bytes actually skipped.

Annotations

@Override

Exceptions

IOException:: if an I/O error occurs.

public Class ObjectDecoderInputStream

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