Package com.microsoft.sqlserver.jdbc

Class SQLServerNClob

java.lang.Object
com.microsoft.sqlserver.jdbc.SQLServerNClob
All Implemented Interfaces:
java.io.Serializable, java.sql.Clob, java.sql.NClob
public final class SQLServerNClob
extends java.lang.Object
implements java.sql.NClob
Represents a National Character Set LOB object and implements java.sql.NClob.
See Also:
Serialized Form

  • Field Summary

    Fields 
    Modifier and Type Field Description
    protected boolean delayLoadingLob  
    protected com.microsoft.sqlserver.jdbc.TypeInfo typeInfo  
    protected java.lang.String value  

  • Method Summary

    Modifier and Type Method Description
    void free()
    Frees this Clob/NClob object and releases the resources that it holds.
    java.io.InputStream getAsciiStream()
    Returns the CLOB as an ASCII stream.
    java.io.Reader getCharacterStream()
    Returns the CLOB value designated by this Clob object as a java.io.Reader object (or as a stream of characters).
    java.io.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.
    java.lang.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​(java.lang.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​(java.sql.Clob searchstr, long start)
    Returns the character position at which the specified Clob object searchstr appears in this Clob object.
    java.io.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.
    java.io.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​(java.nio.charset.Charset c)  
    int setString​(long pos, java.lang.String s)
    Writes the given Java String to the CLOB value that this Clob object designates at the position pos.
    int setString​(long pos, java.lang.String str, int offset, int len)
    Writes len characters of str, starting at character offset, to the CLOB value that this Clob represents.
    java.lang.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, getCharacterStream, getCharacterStream, getSubString, length, position, position, setAsciiStream, setCharacterStream, setString, setString, truncate

  • Field Details

    • value

      protected java.lang.String value

    • typeInfo

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

    • delayLoadingLob

      protected boolean delayLoadingLob

  • Method Details

    • getAsciiStream

      public java.io.InputStream getAsciiStream() throws java.sql.SQLException
      Returns the CLOB as an ASCII stream.
      Specified by:
      getAsciiStream in interface java.sql.Clob
      Returns:
      the data as an input stream
      Throws:
      java.sql.SQLException - when an error occurs

    • toString

      public final java.lang.String toString()
      Overrides:
      toString in class java.lang.Object

    • free

      public void free() throws java.sql.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:
      java.sql.SQLException - when an error occurs

    • getCharacterStream

      public java.io.Reader getCharacterStream() throws java.sql.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:
      java.sql.SQLException - if there is an error accessing the CLOB value

    • getCharacterStream

      public java.io.Reader getCharacterStream​(long pos, long length) throws java.sql.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:
      java.sql.SQLException - when an error occurs.

    • getSubString

      public java.lang.String getSubString​(long pos, int length) throws java.sql.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:
      java.sql.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 java.sql.SQLException
      Returns the number of characters in the CLOB value designated by this Clob object.
      Returns:
      length of the CLOB in characters
      Throws:
      java.sql.SQLException - when an error occurs

    • position

      public long position​(java.sql.Clob searchstr, long start) throws java.sql.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:
      java.sql.SQLException - - if there is an error accessing the CLOB value or if start is less than 1

    • position

      public long position​(java.lang.String searchstr, long start) throws java.sql.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:
      java.sql.SQLException - - if there is an error accessing the CLOB value or if start is less than 1

    • truncate

      public void truncate​(long len) throws java.sql.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:
      java.sql.SQLException - when an error occurs

    • setAsciiStream

      public java.io.OutputStream setAsciiStream​(long pos) throws java.sql.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:
      java.sql.SQLException - when an error occurs

    • setCharacterStream

      public java.io.Writer setCharacterStream​(long pos) throws java.sql.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:
      java.sql.SQLException - when an error occurs

    • setString

      public int setString​(long pos, java.lang.String s) throws java.sql.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:
      java.sql.SQLException - when an error occurs

    • setString

      public int setString​(long pos, java.lang.String str, int offset, int len) throws java.sql.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:
      java.sql.SQLException - - if there is an error accessing the CLOB value or if pos is less than 1

    • setDefaultCharset

      protected void setDefaultCharset​(java.nio.charset.Charset c)