com.tangosol.io
Class WrapperDataOutputStream

java.lang.Object
  java.io.OutputStream
      com.tangosol.io.WrapperDataOutputStream

All Implemented Interfaces:

OutputStreaming, Closeable, DataOutput, Flushable

Direct Known Subclasses:

WrapperObjectOutputStream

public class WrapperDataOutputStream
extends OutputStream
implements DataOutput, OutputStreaming

This is an imitation DataOutputStream class that provides the DataOutput interface by delegating to an object that implements the DataOutput interface. Primarily, this is intended as a base class for building specific-purpose DataOutput wrappers.

Author:

cp 2004.08.20

Constructor Summary

WrapperDataOutputStream(DataOutput out)
Construct a WrapperDataOutputStream that will output to the specified object implementing the DataOutput interface.

Method Summary

void	close() Closes this OutputStream and releases any associated system resources.
void	flush() Flushes this OutputStream and forces any buffered output bytes to be written.
long	getBytesWritten() Return the total number of bytes written to the wrapped DataOutput object.
DataOutput	getDataOutput() Obtain the underlying object providing the DataOutput interface that this object is delegating to.
protected void	incBytesWritten(int cb) Increment the count of total number of bytes written to the wrapped DataOutput object by the specified number of bytes.
void	write(byte[] ab) Writes all the bytes in the array ab.
void	write(byte[] ab, int of, int cb) Writes cb bytes starting at offset of from the array ab.
void	write(int b) Writes the eight low-order bits of the argument b.
void	writeBoolean(boolean f) Writes the boolean value f.
void	writeByte(int b) Writes the eight low-order bits of the argument b.
void	writeBytes(String s) Writes the String s, but only the low-order byte from each character of the String is written.
void	writeChar(int ch) Writes a char value, comprised of the 16 low-order bits of the argument ch; the 16 high-order bits of ch are ignored.
void	writeChars(String s) Writes the String s as a sequence of characters.
void	writeDouble(double dfl) Writes a double value.
void	writeFloat(float fl) Writes a float value.
void	writeInt(int n) Writes an int value.
void	writeLong(long l) Writes a long value.
void	writeShort(int n) Writes a short value, comprised of the 16 low-order bits of the argument n; the 16 high-order bits of n are ignored.
void	writeUTF(String s) Writes the String s as a sequence of characters, but using UTF-8 encoding for the characters, and including the String length data so that the corresponding DataInput.readUTF() method can reconstitute a String from the written data.

Constructor Detail

WrapperDataOutputStream

public WrapperDataOutputStream(DataOutput out)

Construct a WrapperDataOutputStream that will output to the specified object implementing the DataOutput interface.

Parameters:

out - an object implementing DataOutput to write to

Method Detail

getDataOutput

public DataOutput getDataOutput()

Obtain the underlying object providing the DataOutput interface that this object is delegating to.

Returns:

the underlying DataOutput

getBytesWritten

public long getBytesWritten()

Return the total number of bytes written to the wrapped DataOutput object.

Returns:

the total number of bytes written

incBytesWritten

protected void incBytesWritten(int cb)

Increment the count of total number of bytes written to the wrapped DataOutput object by the specified number of bytes.

If the count has reached Long.MAX_VALUE, the count is not incremented.

Parameters:

cb - the number of bytes to increment the count by

write

public void write(int b)
           throws IOException

Writes the eight low-order bits of the argument b. The 24 high-order bits of b are ignored.

Specified by:

write in interface OutputStreaming

Specified by:

write in interface DataOutput

Specified by:

write in class OutputStream

Parameters:

b - the byte to write (passed as an integer)

Throws:

IOException - if an I/O error occurs

write

public void write(byte[] ab)
           throws IOException

Writes all the bytes in the array ab.

Specified by:

write in interface OutputStreaming

Specified by:

write in interface DataOutput

Overrides:

write in class OutputStream

Parameters:

ab - the byte array to write

Throws:

IOException - if an I/O error occurs

NullPointerException - if ab is null

write

public void write(byte[] ab,
                  int of,
                  int cb)
           throws IOException

Writes cb bytes starting at offset of from the array ab.

Specified by:

write in interface OutputStreaming

Specified by:

write in interface DataOutput

Overrides:

write in class OutputStream

Parameters:

ab - the byte array to write from

of - the offset into ab to start writing from

cb - the number of bytes from ab to write

Throws:

IOException - if an I/O error occurs

NullPointerException - if ab is null

IndexOutOfBoundsException - if of is negative, or cb is negative, or of+cb is greater than ab.length

writeBoolean

public void writeBoolean(boolean f)
                  throws IOException

Writes the boolean value f.

Specified by:

writeBoolean in interface DataOutput

Parameters:

f - the boolean to be written

Throws:

IOException - if an I/O error occurs

writeByte

public void writeByte(int b)
               throws IOException

Writes the eight low-order bits of the argument b. The 24 high-order bits of b are ignored.

Specified by:

writeByte in interface DataOutput

Parameters:

b - the byte to write (passed as an integer)

Throws:

IOException - if an I/O error occurs

writeShort

public void writeShort(int n)
                throws IOException

Writes a short value, comprised of the 16 low-order bits of the argument n; the 16 high-order bits of n are ignored.

Specified by:

writeShort in interface DataOutput

Parameters:

n - the short to write (passed as an integer)

Throws:

IOException - if an I/O error occurs

writeChar

public void writeChar(int ch)
               throws IOException

Writes a char value, comprised of the 16 low-order bits of the argument ch; the 16 high-order bits of ch are ignored.

Specified by:

writeChar in interface DataOutput

Parameters:

ch - the char to write (passed as an integer)

Throws:

IOException - if an I/O error occurs

writeInt

public void writeInt(int n)
              throws IOException

Writes an int value.

Specified by:

writeInt in interface DataOutput

Parameters:

n - the int to write

Throws:

IOException - if an I/O error occurs

writeLong

public void writeLong(long l)
               throws IOException

Writes a long value.

Specified by:

writeLong in interface DataOutput

Parameters:

l - the long to write

Throws:

IOException - if an I/O error occurs

writeFloat

public void writeFloat(float fl)
                throws IOException

Writes a float value.

Specified by:

writeFloat in interface DataOutput

Parameters:

fl - the float to write

Throws:

IOException - if an I/O error occurs

writeDouble

public void writeDouble(double dfl)
                 throws IOException

Writes a double value.

Specified by:

writeDouble in interface DataOutput

Parameters:

dfl - the double to write

Throws:

IOException - if an I/O error occurs

writeBytes

public void writeBytes(String s)
                throws IOException

Writes the String s, but only the low-order byte from each character of the String is written.

Specified by:

writeBytes in interface DataOutput

Parameters:

s - the String to write

Throws:

IOException - if an I/O error occurs

NullPointerException - if s is null

writeChars

public void writeChars(String s)
                throws IOException

Writes the String s as a sequence of characters.

Specified by:

writeChars in interface DataOutput

Parameters:

s - the String to write

Throws:

IOException - if an I/O error occurs

NullPointerException - if s is null

writeUTF

public void writeUTF(String s)
              throws IOException

Writes the String s as a sequence of characters, but using UTF-8 encoding for the characters, and including the String length data so that the corresponding DataInput.readUTF() method can reconstitute a String from the written data.

Specified by:

writeUTF in interface DataOutput

Parameters:

s - the String to write

Throws:

IOException - if an I/O error occurs

NullPointerException - if s is null

flush

public void flush()
           throws IOException

Flushes this OutputStream and forces any buffered output bytes to be written.

Specified by:

flush in interface OutputStreaming

Specified by:

flush in interface Flushable

Overrides:

flush in class OutputStream

Throws:

IOException - if an I/O error occurs

close

public void close()
           throws IOException

Closes this OutputStream and releases any associated system resources.

Specified by:

close in interface OutputStreaming

Specified by:

close in interface Closeable

Overrides:

close in class OutputStream

Throws:

IOException - if an I/O error occurs