Package org.h2.value

Class Transfer

java.lang.Object
org.h2.value.Transfer
public final class Transfer extends Object
The transfer class is used to send and receive Value objects. It is used on both the client side, and on the server side.

  • Constructor Details

    • Transfer

      public Transfer(Session session, Socket s)
      Create a new transfer object for the specified session.
      Parameters:
      session - the session
      s - the socket

  • Method Details

    • init

      public void init() throws IOException
      Initialize the transfer object. This method will try to open an input and output stream.
      Throws:
      IOException - on failure

    • flush

      public void flush() throws IOException
      Write pending changes.
      Throws:
      IOException - on failure

    • writeBoolean

      public Transfer writeBoolean(boolean x) throws IOException
      Write a boolean.
      Parameters:
      x - the value
      Returns:
      itself
      Throws:
      IOException - on failure

    • readBoolean

      public boolean readBoolean() throws IOException
      Read a boolean.
      Returns:
      the value
      Throws:
      IOException - on failure

    • writeByte

      public Transfer writeByte(byte x) throws IOException
      Write a byte.
      Parameters:
      x - the value
      Returns:
      itself
      Throws:
      IOException - on failure

    • readByte

      public byte readByte() throws IOException
      Read a byte.
      Returns:
      the value
      Throws:
      IOException - on failure

    • writeInt

      public Transfer writeInt(int x) throws IOException
      Write an int.
      Parameters:
      x - the value
      Returns:
      itself
      Throws:
      IOException - on failure

    • readInt

      public int readInt() throws IOException
      Read an int.
      Returns:
      the value
      Throws:
      IOException - on failure

    • writeLong

      public Transfer writeLong(long x) throws IOException
      Write a long.
      Parameters:
      x - the value
      Returns:
      itself
      Throws:
      IOException - on failure

    • readLong

      public long readLong() throws IOException
      Read a long.
      Returns:
      the value
      Throws:
      IOException - on failure

    • writeString

      public Transfer writeString(String s) throws IOException
      Write a string. The maximum string length is Integer.MAX_VALUE.
      Parameters:
      s - the value
      Returns:
      itself
      Throws:
      IOException - on failure

    • readString

      public String readString() throws IOException
      Read a string.
      Returns:
      the value
      Throws:
      IOException - on failure

    • writeBytes

      public Transfer writeBytes(byte[] data) throws IOException
      Write a byte array.
      Parameters:
      data - the value
      Returns:
      itself
      Throws:
      IOException - on failure

    • writeBytes

      public Transfer writeBytes(byte[] buff, int off, int len) throws IOException
      Write a number of bytes.
      Parameters:
      buff - the value
      off - the offset
      len - the length
      Returns:
      itself
      Throws:
      IOException - on failure

    • readBytes

      public byte[] readBytes() throws IOException
      Read a byte array.
      Returns:
      the value
      Throws:
      IOException - on failure

    • readBytes

      public void readBytes(byte[] buff, int off, int len) throws IOException
      Read a number of bytes.
      Parameters:
      buff - the target buffer
      off - the offset
      len - the number of bytes to read
      Throws:
      IOException - on failure

    • close

      public void close()
      Close the transfer object and the socket.

    • writeTypeInfo

      public Transfer writeTypeInfo(TypeInfo type) throws IOException
      Write value type, precision, and scale.
      Parameters:
      type - data type information
      Returns:
      itself
      Throws:
      IOException - on failure

    • readTypeInfo

      public TypeInfo readTypeInfo() throws IOException
      Read a type information.
      Returns:
      the type information
      Throws:
      IOException - on failure

    • writeValue

      public void writeValue(Value v) throws IOException
      Write a value.
      Parameters:
      v - the value
      Throws:
      IOException - on failure

    • readValue

      public Value readValue(TypeInfo columnType) throws IOException
      Read a value.
      Parameters:
      columnType - the data type of value, or null
      Returns:
      the value
      Throws:
      IOException - on failure

    • readRowCount

      public long readRowCount() throws IOException
      Read a row count.
      Returns:
      the row count
      Throws:
      IOException - on failure

    • writeRowCount

      public Transfer writeRowCount(long rowCount) throws IOException
      Write a row count.
      Parameters:
      rowCount - the row count
      Returns:
      itself
      Throws:
      IOException - on failure

    • getSocket

      public Socket getSocket()
      Get the socket.
      Returns:
      the socket

    • setSession

      public void setSession(Session session)
      Set the session.
      Parameters:
      session - the session

    • setSSL

      public void setSSL(boolean ssl)
      Enable or disable SSL.
      Parameters:
      ssl - the new value

    • openNewConnection

      public Transfer openNewConnection() throws IOException
      Open a new connection to the same address and port as this one.
      Returns:
      the new transfer object
      Throws:
      IOException - on failure

    • setVersion

      public void setVersion(int version)

    • getVersion

      public int getVersion()

    • isClosed

      public boolean isClosed()

    • verifyLobMac

      public void verifyLobMac(byte[] hmac, long lobId)
      Verify the HMAC.
      Parameters:
      hmac - the message authentication code
      lobId - the lobId
      Throws:
      DbException - if the HMAC does not match