com.informix.jdbc

Class IfxLobInputStream

java.lang.Object

java.io.InputStream

com.informix.jdbc.IfxLobInputStream

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

public class IfxLobInputStream
extends java.io.InputStream

JDBC 2.0 A IfxInputStream is a subclass of InputStream.

Constructor Summary

Constructors

Constructor and Description
IfxLobInputStream(IfxConnection connection, IfxLocator loPtr) Constructor Construct an IfxLobInputStream instance
IfxLobInputStream(IfxConnection connection, IfxLocator loPtr, long size)

Method Summary

Modifier and Type	Method and Description
int	available() Returns the number of bytes that can be read from this file input stream without blocking.
void	close()
protected java.io.InputStream	getStream()
boolean	markSupported() Tests if this Input Stream supports the mark method.
int	read() Reads a byte of data from this input stream.
int	read(byte[] b) Reads upto b.length bytes of data from this input Stream into an array of bytes.
int	read(byte[] b, int off, int len) Reads upto len bytes of data from this input Stream into an array of bytes.
void	reset() Reset the Large object current reading point to the begining
long	skip(long n) Skips over and discards n bytes of data from the input stream.

Methods inherited from class java.io.InputStream

mark

Methods inherited from class java.lang.Object

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

Constructor Detail

IfxLobInputStream

public IfxLobInputStream(IfxConnection connection,
                         IfxLocator loPtr)
                  throws java.sql.SQLException,
                         java.io.IOException

Constructor Construct an IfxLobInputStream instance

Parameters:

IfxConnection -

IfxLocator -

Throws:

java.sql.SQLException - If object instance cannot be instantiated

java.io.IOException

IfxLobInputStream

public IfxLobInputStream(IfxConnection connection,
                         IfxLocator loPtr,
                         long size)
                  throws java.sql.SQLException,
                         java.io.IOException

Throws:

java.sql.SQLException

java.io.IOException

Method Detail

read

public int read()
         throws java.io.IOException

Reads a byte of data from this input stream.

Specified by:

read in class java.io.InputStream

Returns:

the next byte of data, or -1 if the end of the lob is reached.

Throws:

java.io.IOException - if an I/O error occurs.

read

public int read(byte[] b)
         throws java.io.IOException

Reads upto b.length bytes of data from this input Stream into an array of bytes. This method blocks until some input is available.

Overrides:

read in class java.io.InputStream

Parameters:

b - 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 lob has been reached.

Throws:

java.io.IOException - If an I/O error has occurred.

read

public int read(byte[] b,
                int off,
                int len)
         throws java.io.IOException

Reads upto len bytes of data from this input Stream into an array of bytes. This method blocks until some input is available.

Overrides:

read in class java.io.InputStream

Parameters:

b - the buffer into which the data is read.

off - the start offset of the data - the offset into b at which we should start writing.

len - the maximum number of bytes read.

Returns:

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

Throws:

java.io.IOException - If an I/O error has occurred.

skip

public long skip(long n)
          throws java.io.IOException

Skips over and discards n bytes of data from the input stream. The skip method may, for a variety of reasons, end up skipping over some smaller number of bytes, possibly 0. The actual number of bytes skipped is returned.

Overrides:

skip in class java.io.InputStream

Parameters:

n - the number of bytes to be skipped.

Returns:

the actual number of bytes skipped.

Throws:

java.io.IOException - if an I/O error occurs.

reset

public void reset()
           throws java.io.IOException

Reset the Large object current reading point to the begining

Overrides:

reset in class java.io.InputStream

Throws:

java.io.IOException - if an I/O error occurs.

markSupported

public boolean markSupported()

Tests if this Input Stream supports the mark method.

Overrides:

markSupported in class java.io.InputStream

Returns:

false. Note : This Input Stream however supports reset.

available

public int available()
              throws java.io.IOException

Returns the number of bytes that can be read from this file input stream without blocking.

Overrides:

available in class java.io.InputStream

Returns:

the number of bytes that can be read from this file input stream without blocking.

Throws:

java.io.IOException - if an I/O error occurs.

close

public void close()
           throws java.io.IOException

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable

Overrides:

close in class java.io.InputStream

Throws:

java.io.IOException

getStream

protected java.io.InputStream getStream()
                                 throws java.sql.SQLException

Throws:

java.sql.SQLException