org.jooq

Interface Binding<T,U>

Type Parameters:

T - The database type - i.e. any type available from SQLDataType

U - The user type

All Superinterfaces:

Serializable

All Known Implementing Classes:

AbstractXMLasObjectBinding, BlobBinding, ClobBinding, DateAsTimestampBinding, DefaultBinding, XMLasDOMBinding

public interface Binding<T,U>
extends Serializable

An SPI (Service Provider Interface) that exposes all low-level interactions with JDBC bind variables.

This SPI is used by jOOQ users to implement support for custom data types that would otherwise not be supported by jOOQ and/or JDBC. All of jOOQ's internal support for bind variable types is implemented in DefaultBinding.

Author:

Lukas Eder

Method Summary

Modifier and Type	Method and Description
Converter<T,U>	converter() A converter that can convert between the database type and the custom type.
void	get(BindingGetResultSetContext<U> ctx) Get a ResultSet's OUT value.
void	get(BindingGetSQLInputContext<U> ctx) Get a SQLInput's OUT value.
void	get(BindingGetStatementContext<U> ctx) Get a CallableStatement's OUT value.
void	register(BindingRegisterContext<U> ctx) Register a CallableStatement's OUT parameter.
void	set(BindingSetSQLOutputContext<U> ctx) Set a SQLOutput's IN parameter.
void	set(BindingSetStatementContext<U> ctx) Set a PreparedStatement's IN parameter.
void	sql(BindingSQLContext<U> ctx) Generate SQL code for the bind variable.

Method Detail

converter

Converter<T,U> converter()

A converter that can convert between the database type and the custom type.

sql

void sql(BindingSQLContext<U> ctx)
  throws SQLException

Generate SQL code for the bind variable.

Implementations should generate SQL code onto BindingSQLContext.render(), given the context's bind variable located at BindingSQLContext.value(). Examples of such SQL code are:

• "?": Default implementations can simply generate a question mark.
  
  
• "123": Implementations may choose to inline bind variables to influence execution plan generation.
  
  RenderContext.paramType() contains information whether inlined bind variables are expected in the current context.
  
  
• "CAST(? AS DATE)": Cast a database to a more specific type. This can be useful in databases like Oracle, which map both DATE and TIMESTAMP SQL types to Timestamp.
  
  RenderContext.castMode() may contain some hints about whether casting is suggested in the current context.
  
  
• "?::json": Vendor-specific bind variables can be supported, e.g. SQLDialect.POSTGRES's JSON data type.

Implementations must provide consistent behaviour between sql(BindingSQLContext) and set(BindingSetStatementContext), i.e. when bind variables are inlined, then they must not be bound to the PreparedStatement in set(BindingSetStatementContext)

Parameters:

ctx - The context object containing all argument objects.

Throws:

SQLException - Implementations are allowed to pass on all SQLExceptions to the caller to be wrapped in DataAccessExceptions.

register

void register(BindingRegisterContext<U> ctx)
       throws SQLException

Register a CallableStatement's OUT parameter.

Parameters:

ctx - The context object containing all argument objects.

Throws:

SQLException - Implementations are allowed to pass on all SQLExceptions to the caller to be wrapped in DataAccessExceptions.

set

void set(BindingSetStatementContext<U> ctx)
  throws SQLException

Set a PreparedStatement's IN parameter.

Parameters:

ctx - The context object containing all argument objects.

Throws:

SQLException - Implementations are allowed to pass on all SQLExceptions to the caller to be wrapped in DataAccessExceptions.

set

void set(BindingSetSQLOutputContext<U> ctx)
  throws SQLException

Set a SQLOutput's IN parameter.

Parameters:

ctx - The context object containing all argument objects.

Throws:

SQLException - Implementations are allowed to pass on all SQLExceptions to the caller to be wrapped in DataAccessExceptions.

get

void get(BindingGetResultSetContext<U> ctx)
  throws SQLException

Get a ResultSet's OUT value.

Implementations are expected to produce a value by calling BindingGetResultSetContext.value(Object), passing the resulting value to the method.

Parameters:

ctx - The context object containing all argument objects.

Throws:

SQLException - Implementations are allowed to pass on all SQLExceptions to the caller to be wrapped in DataAccessExceptions.

get

void get(BindingGetStatementContext<U> ctx)
  throws SQLException

Get a CallableStatement's OUT value.

Implementations are expected to produce a value by calling BindingGetStatementContext.value(Object), passing the resulting value to the method.

Parameters:

ctx - The context object containing all argument objects.

Throws:

SQLException - Implementations are allowed to pass on all SQLExceptions to the caller to be wrapped in DataAccessExceptions.

get

void get(BindingGetSQLInputContext<U> ctx)
  throws SQLException

Get a SQLInput's OUT value.

Implementations are expected to produce a value by calling BindingGetSQLInputContext.value(Object), passing the resulting value to the method.

Parameters:

ctx - The context object containing all argument objects.

Throws:

SQLException - Implementations are allowed to pass on all SQLExceptions to the caller to be wrapped in DataAccessExceptions.