com.github.pgasync.impl.io

Class BindEncoder

java.lang.Object

com.github.pgasync.impl.io.BindEncoder

All Implemented Interfaces:

Encoder<Bind>

public class BindEncoder
extends java.lang.Object
implements Encoder<Bind>

See PostgreSQL message formats

 Bind (F)
   Byte1('B')
       Identifies the message as a Bind command.
   Int32
       Length of message contents in bytes, including self.
   String
       The name of the destination portal (an empty string selects the unnamed portal).
   String
       The name of the source prepared statement (an empty string selects the unnamed prepared statement).
   Int16
       The number of parameter format codes that follow (denoted C below). This can be zero to indicate that there are no parameters or that the parameters all use the default format (text); or one, in which case the specified format code is applied to all parameters; or it can equal the actual number of parameters.
   Int16[C]
       The parameter format codes. Each must presently be zero (text) or one (binary).
   Int16
       The number of parameter values that follow (possibly zero). This must match the number of parameters needed by the query.
   Next, the following pair of fields appear for each parameter:
   Int32
       The length of the parameter value, in bytes (this count does not include itself). Can be zero. As a special case, -1 indicates a NULL parameter value. No value bytes follow in the NULL case.
   Byten
       The value of the parameter, in the format indicated by the associated format code. n is the above length.
   After the last parameter, the following fields appear:
   Int16
       The number of result-column format codes that follow (denoted R below). This can be zero to indicate that there are no result columns or that the result columns should all use the default format (text); or one, in which case the specified format code is applied to all result columns (if any); or it can equal the actual number of result columns of the query.
   Int16[R]
       The result-column format codes. Each must presently be zero (text) or one (binary).

Author:

Antti Laisi

Constructor Summary

Constructors

Constructor and Description
BindEncoder()

Method Summary

Modifier and Type	Method and Description
java.lang.Class<Bind>	getMessageType()
void	write(Bind msg, java.nio.ByteBuffer buffer)

Methods inherited from class java.lang.Object

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

Constructor Detail

BindEncoder

public BindEncoder()

Method Detail

getMessageType

public java.lang.Class<Bind> getMessageType()

Specified by:

getMessageType in interface Encoder<Bind>

Returns:

Message class

write

public void write(Bind msg,
                  java.nio.ByteBuffer buffer)

Specified by:

write in interface Encoder<Bind>

Parameters:

msg - Protocol message

buffer - Target buffer