com.oceanbase.jdbc

类 Lob

java.lang.Object

com.oceanbase.jdbc.Lob

所有已实现的接口:

Serializable

直接已知子类:

Blob, Clob

public abstract class Lob
extends Object
implements Serializable

另请参阅:

序列化表格

字段概要

字段

限定符和类型	字段和说明
protected String	charData
protected byte[]	data
protected static int	DBMS_LOB_MAX_AMOUNT
protected String	encoding
protected ExceptionInterceptor	exceptionInterceptor
protected boolean	isOracleMode
protected int	length
protected int	lengthFromServer
protected com.oceanbase.jdbc.ObLobLocator	locator
protected int	offset

构造器概要

构造器

构造器和说明
Lob()
Lob(byte[] bytes) Creates a blob with content.
Lob(byte[] bytes, ExceptionInterceptor exceptionInterceptor)
Lob(byte[] bytes, int offset, int length) Creates a blob with content.

方法概要

限定符和类型	方法和说明
void	buildObLobLocatorV1(boolean isBinary, Buffer buffer, long magicCode, long version, OceanBaseConnection conn)
void	buildObLobLocatorV2(boolean isBinary, Buffer buffer, long magicCode, long version, OceanBaseConnection conn)
void	clearData()
void	copy(Lob lob)
void	free() This method frees the Blob object and releases the resources that it holds.
InputStream	getBinaryStream()
InputStream	getBinaryStream(long pos, long length)
byte[]	getBytes(long pos, int length)
com.oceanbase.jdbc.ObLobLocator	getLocator()
boolean	isEmptyLob()
protected abstract void	readFromServer()
OutputStream	setBinaryStream(long pos) Retrieves a stream that can be used to write to the BLOB value that this Blob object represents.
int	setBytes(long pos, byte[] bytes)

从类继承的方法 java.lang.Object

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

字段详细资料

DBMS_LOB_MAX_AMOUNT

protected static int DBMS_LOB_MAX_AMOUNT

data

protected byte[] data

offset

protected transient int offset

length

protected transient int length

locator

protected com.oceanbase.jdbc.ObLobLocator locator

encoding

protected String encoding

charData

protected String charData

lengthFromServer

protected int lengthFromServer

exceptionInterceptor

protected ExceptionInterceptor exceptionInterceptor

isOracleMode

protected boolean isOracleMode

构造器详细资料

Lob

public Lob()

Lob

public Lob(byte[] bytes)

Creates a blob with content.

参数:

bytes - the content for the blob.

Lob

public Lob(byte[] bytes,
           ExceptionInterceptor exceptionInterceptor)

Lob

public Lob(byte[] bytes,
           int offset,
           int length)

Creates a blob with content.

参数:

bytes - the content for the blob.

offset - offset

length - length

方法详细资料

copy

public void copy(Lob lob)

clearData

public void clearData()

buildObLobLocatorV1

public void buildObLobLocatorV1(boolean isBinary,
                                Buffer buffer,
                                long magicCode,
                                long version,
                                OceanBaseConnection conn)
                         throws SQLException

抛出:

SQLException

buildObLobLocatorV2

public void buildObLobLocatorV2(boolean isBinary,
                                Buffer buffer,
                                long magicCode,
                                long version,
                                OceanBaseConnection conn)
                         throws SQLException

抛出:

SQLException

setBinaryStream

public OutputStream setBinaryStream(long pos)
                             throws SQLException

Retrieves a stream that can be used to write to the BLOB value that this Blob object represents. The stream begins at position pos. The bytes written to the stream will overwrite the existing bytes in the Blob object starting at the position pos. If the end of the Blob value is reached while writing to the stream, then the length of the Blob value will be increased to accommodate the extra bytes.

Note: If the value specified for pos is greater then the length+1 of the BLOB value then the behavior is undefined. Some JDBC drivers may throw a SQLException while other drivers may support this operation.

参数:

pos - the position in the BLOB value at which to start writing; the first position is 1

返回:

a java.io.OutputStream object to which data can be written

抛出:

SQLException - if there is an error accessing the BLOB value or if pos is less than 1

从以下版本开始:

1.4

另请参阅:

getBinaryStream()

getBinaryStream

public InputStream getBinaryStream()
                            throws SQLException

抛出:

SQLException

getBinaryStream

public InputStream getBinaryStream(long pos,
                                   long length)
                            throws SQLException

抛出:

SQLException

setBytes

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

抛出:

SQLException

free

public void free()

This method frees the Blob object and releases the resources that it holds. The object is invalid once the free method is called.

After free has been called, any attempt to invoke a method other than free will result in a SQLException being thrown. If free is called multiple times, the subsequent calls to free are treated as a no-op.

isEmptyLob

public boolean isEmptyLob()

getBytes

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

抛出:

SQLException

getLocator

public com.oceanbase.jdbc.ObLobLocator getLocator()

readFromServer

protected abstract void readFromServer()
                                throws SQLException

抛出:

SQLException