Package org.apache.jena.dboe.base.file

Class SegmentedMemBuffer

  • public class SegmentedMemBuffer
extends java.lang.Object
    A segmented, expanding buffer of bytes. This class does not copy the underlying bytes when the file grows. Hence, the performance is more predictable. (Resizing a fixed size buffer is a copy c.f. performance issues with ArrayList or ByteArrayOutputStream as they go from small to large.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void close()  
      boolean isOpen()  
      long length()  
      void open()  
      int read​(long posn, byte[] b)  
      int read​(long posn, byte[] b, int start, int length)  
      int read​(long posn, java.nio.ByteBuffer bb)  
      void sync()  
      void truncate​(long length)  
      void write​(long posn, byte[] b)  
      void write​(long posn, byte[] b, int start, int length)  
      void write​(long posn, java.nio.ByteBuffer bb)  

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • SegmentedMemBuffer

        public SegmentedMemBuffer()

      • SegmentedMemBuffer

        public SegmentedMemBuffer​(int chunk)

    • Method Detail

      • open

        public void open()

      • isOpen

        public boolean isOpen()

      • read

        public int read​(long posn,
                java.nio.ByteBuffer bb)

      • read

        public int read​(long posn,
                byte[] b)

      • read

        public int read​(long posn,
                byte[] b,
                int start,
                int length)

      • write

        public void write​(long posn,
                  java.nio.ByteBuffer bb)

      • write

        public void write​(long posn,
                  byte[] b)

      • write

        public void write​(long posn,
                  byte[] b,
                  int start,
                  int length)

      • truncate

        public void truncate​(long length)

      • sync

        public void sync()

      • close

        public void close()

      • length

        public long length()