Package com.microsoft.sqlserver.jdbc

Class SQLServerClob

java.lang.Object

com.microsoft.sqlserver.jdbc.SQLServerClob

All Implemented Interfaces:

Serializable, Clob

public class SQLServerClob
extends Object
implements Clob

Represents a character LOB object and implements java.sql.Clob.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected com.microsoft.sqlserver.jdbc.TypeInfo	typeInfo
protected String	value

Constructor Summary

Constructors

Constructor	Description
SQLServerClob(SQLServerConnection connection, String data)	Deprecated. Use SQLServerConnection.createClob() instead.

Method Summary

Modifier and Type	Method	Description
void	free()	Frees this Clob/NClob object and releases the resources that it holds.
InputStream	getAsciiStream()	Returns the CLOB as an ASCII stream.
Reader	getCharacterStream()	Returns the CLOB value designated by this Clob object as a java.io.Reader object (or as a stream of characters).
Reader	getCharacterStream(long pos, long length)	Returns the Clob data as a java.io.Reader object or as a stream of characters with the specified position and length.
String	getSubString(long pos, int length)	Returns a copy of the specified substring in the CLOB value designated by this Clob object.
long	length()	Returns the number of characters in the CLOB value designated by this Clob object.
long	position(String searchstr, long start)	Returns the character position at which the specified substring searchstr appears in the SQL CLOB value represented by this Clob object.
long	position(Clob searchstr, long start)	Returns the character position at which the specified Clob object searchstr appears in this Clob object.
OutputStream	setAsciiStream(long pos)	Returns a stream to be used to write Ascii characters to the CLOB value that this Clob object represents, starting at position pos.
Writer	setCharacterStream(long pos)	Returns a stream to be used to write a stream of Unicode characters to the CLOB value that this Clob object represents, at position pos.
protected void	setDefaultCharset(Charset c)
int	setString(long pos, String s)	Writes the given Java String to the CLOB value that this Clob object designates at the position pos.
int	setString(long pos, String str, int offset, int len)	Writes len characters of str, starting at character offset, to the CLOB value that this Clob represents.
String	toString()
void	truncate(long len)	Truncates the CLOB value that this Clob designates to have a length of len characters.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.sql.Clob

free, getAsciiStream, getCharacterStream, getCharacterStream, getSubString, length, position, position, setAsciiStream, setCharacterStream, setString, setString, truncate

Field Detail

value

protected String value

typeInfo

protected final com.microsoft.sqlserver.jdbc.TypeInfo typeInfo

Constructor Detail

SQLServerClob

@Deprecated
public SQLServerClob(SQLServerConnection connection,
                     String data)

Deprecated.

Use SQLServerConnection.createClob() instead.

Constructs a SQLServerClob.

Parameters:

connection - the database connection this blob is implemented on

data - the CLOB's data

Method Detail

toString

public final String toString()

Overrides:

toString in class Object

free

public void free()
          throws SQLException

Frees this Clob/NClob object and releases the resources that it holds. 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.

Throws:

SQLException - when an error occurs

getAsciiStream

public InputStream getAsciiStream()
                           throws SQLException

Returns the CLOB as an ASCII stream.

Returns:

the data as an input stream

Throws:

SQLException - when an error occurs

getCharacterStream

public Reader getCharacterStream()
                          throws SQLException

Returns the CLOB value designated by this Clob object as a java.io.Reader object (or as a stream of characters).

Returns:

a java.io.Reader object containing the CLOB data

Throws:

SQLException - if there is an error accessing the CLOB value

getCharacterStream

public Reader getCharacterStream(long pos,
                                 long length)
                          throws SQLException

Returns the Clob data as a java.io.Reader object or as a stream of characters with the specified position and length.

Parameters:

pos - A long that indicates the offset to the first character of the partial value to be retrieved.

length - A long that indicates the length in characters of the partial value to be retrieved.

Returns:

A Reader object that contains the Clob data.

Throws:

SQLException - when an error occurs.

getSubString

public String getSubString(long pos,
                           int length)
                    throws SQLException

Returns a copy of the specified substring in the CLOB value designated by this Clob object. The substring begins at position pos and has up to length consecutive characters.

Parameters:

pos - - the first character of the substring to be extracted. The first character is at position 1.

length - - the number of consecutive characters to be copied; the value for length must be 0 or greater

Returns:

a String that is the specified substring in the CLOB value designated by this Clob object

Throws:

SQLException - - if there is an error accessing the CLOB value; if pos is less than 1 or length is less than 0

length

public long length()
            throws SQLException

Returns the number of characters in the CLOB value designated by this Clob object.

Returns:

length of the CLOB in characters

Throws:

SQLException - when an error occurs

position

public long position(Clob searchstr,
                     long start)
              throws SQLException

Returns the character position at which the specified Clob object searchstr appears in this Clob object. The search begins at position start.

Parameters:

searchstr - - the Clob for which to search

start - - the position at which to begin searching; the first position is 1

Returns:

the position at which the Clob object appears or -1 if it is not present; the first position is 1

Throws:

SQLException - - if there is an error accessing the CLOB value or if start is less than 1

position

public long position(String searchstr,
                     long start)
              throws SQLException

Returns the character position at which the specified substring searchstr appears in the SQL CLOB value represented by this Clob object. The search begins at position start.

Parameters:

searchstr - - the substring for which to search

start - - the position at which to begin searching; the first position is 1

Returns:

the position at which the substring appears or -1 if it is not present; the first position is 1

Throws:

SQLException - - if there is an error accessing the CLOB value or if start is less than 1

truncate

public void truncate(long len)
              throws SQLException

Truncates the CLOB value that this Clob designates to have a length of len characters.

Parameters:

len - the length, in characters, to which the CLOB value should be truncated

Throws:

SQLException - when an error occurs

setAsciiStream

public OutputStream setAsciiStream(long pos)
                            throws SQLException

Returns a stream to be used to write Ascii characters to the CLOB value that this Clob object represents, starting at position pos.

Parameters:

pos - the position at which to start writing to this CLOB object

Returns:

the stream to which ASCII encoded characters can be written

Throws:

SQLException - when an error occurs

setCharacterStream

public Writer setCharacterStream(long pos)
                          throws SQLException

Returns a stream to be used to write a stream of Unicode characters to the CLOB value that this Clob object represents, at position pos.

Parameters:

pos - the position at which to start writing to the CLOB value

Returns:

a stream to which Unicode encoded characters can be written

Throws:

SQLException - when an error occurs

setString

public int setString(long pos,
                     String s)
              throws SQLException

Writes the given Java String to the CLOB value that this Clob object designates at the position pos.

Parameters:

pos - the position at which to start writing to the CLOB

s - the string to be written to the CLOB value that this Clob designates

Returns:

the number of characters written

Throws:

SQLException - when an error occurs

setString

public int setString(long pos,
                     String str,
                     int offset,
                     int len)
              throws SQLException

Writes len characters of str, starting at character offset, to the CLOB value that this Clob represents. The string will overwrite the existing characters in the Clob object starting at the position pos. If the end of the Clob value is reached while writing the given string, then the length of the Clob value will be increased to accommodate the extra characters. SQL Server behavior: If the value specified for pos is greater than then length+1 of the CLOB value then a SQLException is thrown.

Parameters:

pos - - the position at which to start writing to this CLOB object; The first position is 1

str - - the string to be written to the CLOB value that this Clob object represents

offset - - the offset (0-based) into str to start reading the characters to be written

len - - the number of characters to be written

Returns:

the number of characters written

Throws:

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

setDefaultCharset

protected void setDefaultCharset(Charset c)