Package org.apache.derby.impl.jdbc

Class ClobUtf8Writer

  • All Implemented Interfaces:
    java.io.Closeable, java.io.Flushable, java.lang.Appendable, java.lang.AutoCloseable
    final class ClobUtf8Writer
extends java.io.Writer
    Writer implementation for Clob.

    • Field Summary

      Fields 
      Modifier and Type Field Description
      private boolean closed  
      private TemporaryClob control  
      private long pos  

      • Fields inherited from class java.io.Writer

        lock

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void close()
      Closes the stream.
      void flush()
      Flushes the stream.
      void write​(char[] cbuf, int off, int len)
      Writes a portion of an array of characters to the CLOB value.

      • Methods inherited from class java.io.Writer

        append, append, append, nullWriter, write, write, write, write

      • Methods inherited from class java.lang.Object

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

    • Field Detail

      • pos

        private long pos

      • closed

        private boolean closed

    • Constructor Detail

      • ClobUtf8Writer

        ClobUtf8Writer​(TemporaryClob control,
               long pos)
        Constructor.
        Parameters:
        control - worker object for the CLOB value
        pos - initial byte position in the CLOB value

    • Method Detail

      • flush

        public void flush()
           throws java.io.IOException
        Flushes the stream.

        Flushing the stream after close() has been called will cause an exception to be thrown.

        Implementation note: In the current implementation, this is a no-op. Flushing is left to the underlying stream(s). Note that when programming against/with this class, always follow good practice and call flush.

        Specified by:
        flush in interface java.io.Flushable
        Specified by:
        flush in class java.io.Writer
        Throws:
        java.io.IOException - if the stream has been closed

      • close

        public void close()
        Closes the stream.

        Once the stream has been closed, further write or flush() invocations will cause an IOException to be thrown. Closing a previously closed stream has no effect.

        Specified by:
        close in interface java.lang.AutoCloseable
        Specified by:
        close in interface java.io.Closeable
        Specified by:
        close in class java.io.Writer

      • write

        public void write​(char[] cbuf,
                  int off,
                  int len)
           throws java.io.IOException
        Writes a portion of an array of characters to the CLOB value.
        Specified by:
        write in class java.io.Writer
        Parameters:
        cbuf - array of characters
        off - offset into cbuf from which to start writing characters
        len - number of characters to write
        Throws:
        java.io.IOException - if an I/O error occurs