org.hibernate.loader.custom

Class ScalarResultColumnProcessor

java.lang.Object

org.hibernate.loader.custom.ScalarResultColumnProcessor

public class ScalarResultColumnProcessor
extends Object

Represents a scalar result within the custom query

Constructor Summary

Constructors

Constructor and Description
ScalarResultColumnProcessor(int position)
ScalarResultColumnProcessor(String alias, Type type)

Method Summary

Modifier and Type	Method and Description
Object	extract(Object[] data, ResultSet resultSet, SessionImplementor session) Perform The extraction
void	performDiscovery(org.hibernate.loader.custom.JdbcResultMetadata metadata, List<Type> types, List<String> aliases) Perform discovery, if needed.

Methods inherited from class java.lang.Object

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

Constructor Detail

ScalarResultColumnProcessor

public ScalarResultColumnProcessor(int position)

ScalarResultColumnProcessor

public ScalarResultColumnProcessor(String alias,
                                   Type type)

Method Detail

performDiscovery

public void performDiscovery(org.hibernate.loader.custom.JdbcResultMetadata metadata,
                             List<Type> types,
                             List<String> aliases)
                      throws SQLException

Perform discovery, if needed. Typically discovery activities include looking up the column name in the ResultSet or JDBC type codes.

Parameters:

metadata - Delegate for accessing metadata about the JDBC ResultSet

types - The building List of types

aliases - The building list of column names/aliases

Throws:

SQLException - Indicates a problem accessing the JDBC objects

extract

public Object extract(Object[] data,
                      ResultSet resultSet,
                      SessionImplementor session)
               throws SQLException,
                      HibernateException

Perform The extraction

Parameters:

data - All non-scalar results (handled at a higher level than these processors)

resultSet - The JDBC result set.

session - The Hibernate Session

Returns:

The extracted value

Throws:

SQLException - Indicates a problem accessing the JDBC objects

HibernateException - Indicates a higher-level problem already categorized by Hibernate