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ByteArrayBlob (JBoss Server API) - JBoss 4.0.1 sp1 server API Documentation 英文版文档

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org.jboss.ejb.plugins.cmp.jdbc
Class ByteArrayBlob

java.lang.Object
  org.jboss.ejb.plugins.cmp.jdbc.ByteArrayBlob

All Implemented Interfaces:

Blob

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public final class ByteArrayBlob

extends Object

implements Blob

The representation (mapping) in the Java^TM programming language of an SQL BLOB value to an array of bytes. A ByteArrayBlob contains an internal buffer that contains bytes that may be read from the stream. The Blob interface provides methods for getting the length of an SQL BLOB (Binary Large Object) value, for materializing a BLOB value on the client, and for determining the position of a pattern of bytes within a BLOB value. The ByteArrayBlob has static factory methods for construting an BLOB using either an existing serializable object, or an array of bytes. This is a nice way to store serialized objects in a relational field of type SQL BLOB.

Version:

$Revision: 1.5 $

Author:

Andrew McCulloch

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Constructor Summary

ByteArrayBlob(byte[] bytes)

 

Method Summary
InputStream	getBinaryStream()
byte[]	getBytes(long pos, int length)
long	length()
long	position(Blob pattern, long start)
long	position(byte[] pattern, long start)
OutputStream	setBinaryStream(long pos)
int	setBytes(long pos, byte[] bytes)
int	setBytes(long pos, byte[] bytes, int offset, int length)
void	truncate(long length)

 

Methods inherited from class java.lang.Object

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

 

Constructor Detail

ByteArrayBlob

public ByteArrayBlob(byte[] bytes)

Method Detail

getBinaryStream

public InputStream getBinaryStream()
                            throws SQLException

Specified by:

getBinaryStream in interface Blob

Throws:

SQLException

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getBytes

public byte[] getBytes(long pos,
                       int length)
                throws SQLException

Specified by:

getBytes in interface Blob

Throws:

SQLException

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length

public long length()
            throws SQLException

Specified by:

length in interface Blob

Throws:

SQLException

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position

public long position(Blob pattern,
                     long start)
              throws SQLException

Specified by:

position in interface Blob

Throws:

SQLException

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position

public long position(byte[] pattern,
                     long start)
              throws SQLException

Specified by:

position in interface Blob

Throws:

SQLException

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setBinaryStream

public OutputStream setBinaryStream(long pos)
                             throws SQLException

Specified by:

setBinaryStream in interface Blob

Throws:

SQLException

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setBytes

public int setBytes(long pos,
                    byte[] bytes)
             throws SQLException

Specified by:

setBytes in interface Blob

Throws:

SQLException

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setBytes

public int setBytes(long pos,
                    byte[] bytes,
                    int offset,
                    int length)
             throws SQLException

Specified by:

setBytes in interface Blob

Throws:

SQLException

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truncate

public void truncate(long length)
              throws SQLException

Specified by:

truncate in interface Blob

Throws:

SQLException

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