com.ibm.as400.access
Class PrintObjectInputStream

java.lang.Object
  java.io.InputStream
      com.ibm.as400.access.PrintObjectInputStream

All Implemented Interfaces:

Closeable

public class PrintObjectInputStream
extends InputStream

The PrintObjectInputStream class is used to read data out of a system spooled file or AFP resource such as an overlay or page segment.

An instance of this class can be created either by using the getInputStream method from the AFPResource class or by using the getInputStream method from the SpooledFile class.

Method Summary

Modifier and Type	Method and Description
int	available() Returns the number of bytes that can be read without blocking.
void	close() Closes the input stream.
void	mark(int readLimit) Marks the current position in the input stream.
boolean	markSupported() Returns a boolean indicating whether this stream type supports mark/reset.
int	read() Reads the next byte of data from this input stream.
int	read(byte[] data) Reads up to data.length bytes of data from this input stream into data.
int	read(byte[] data, int dataOffset, int length) Reads up to length bytes of data from this input stream into data, starting at the array offset dataOffset.
void	reset() Repositions the stream to the last marked position.
long	skip(long bytesToSkip) Skips over the next bytesToSkip bytes in the stream.

Methods inherited from class java.lang.Object

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

Method Detail

available

public int available()
              throws IOException

Returns the number of bytes that can be read without blocking. This class always returns the number of bytes remaining in the spooled file or AFP resource.

Overrides:

available in class InputStream

Returns:

The number of available bytes without blocking.

Throws:

IOException

close

public void close()
           throws IOException

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

Specified by:

close in interface Closeable

Overrides:

close in class InputStream

Throws:

IOException - If an error occurs while communicating with the system.

mark

public void mark(int readLimit)

Marks the current position in the input stream. A subsequent call to reset() will reposition the stream at the last marked position, so that subsequent reads will reread the same bytes. The stream promises to allow readLimit bytes to be read before the mark position gets invalidated.

Overrides:

mark in class InputStream

Parameters:

readLimit - The maximum limit of bytes allowed to be read before the mark position becomes invalid.

markSupported

public boolean markSupported()

Returns a boolean indicating whether this stream type supports mark/reset.

Overrides:

markSupported in class InputStream

Returns:

Always true. Objects of this class will support the mark/reset methods.

read

public int read()
         throws IOException

Reads the next byte of data from this input stream.

Specified by:

read in class InputStream

Returns:

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

Throws:

IOException - If an error occurs while communicating with the system.

read

public int read(byte[] data)
         throws IOException

Reads up to data.length bytes of data from this input stream into data.

Overrides:

read in class InputStream

Parameters:

data - The buffer into which the data is read.

Returns:

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

Throws:

IOException - If an error occurs while communicating with the system.

read

public int read(byte[] data,
                int dataOffset,
                int length)
         throws IOException

Reads up to length bytes of data from this input stream into data, starting at the array offset dataOffset.

Overrides:

read in class InputStream

Parameters:

data - The buffer into which the data is read.

dataOffset - The start offset of the data.

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 because the end of file has been reached.

Throws:

IOException - If an error occurs while communicating with the system.

reset

public void reset()
           throws IOException

Repositions the stream to the last marked position. If the stream has not been marked or if the mark has been invalidated, an IOException is thrown.

Overrides:

reset in class InputStream

Throws:

IOException - If an error occurs while communicating with the system.

skip

public long skip(long bytesToSkip)
          throws IOException

Skips over the next bytesToSkip bytes in the stream. This method may skip less bytes than specified if the end of file is reached. The actual number of bytes skipped is returned.

Overrides:

skip in class InputStream

Parameters:

bytesToSkip - The number of bytes to be skipped.

Returns:

The actual number of bytes skipped.

Throws:

IOException - If an error occurs while communicating with the system.