Module org.seasar.doma.core

Package org.seasar.doma.internal.jdbc.command

Class MappingSupport

java.lang.Object

org.seasar.doma.internal.jdbc.command.MappingSupport

public class MappingSupport
extends Object

Provides support for handling and mapping database result sets to entity properties. It ensures proper alignment between query results and entity fields, including handling unknown columns, duplicate columns, and unmapped entity properties.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final record	MappingSupport.Prop	Represents a property mapping for an entity during result set processing.
static final record	MappingSupport.PropType	Represents a combination of an entity type, a property type, and the property path for mapping between result set columns and properties in an entity.

Constructor Summary

Constructors

Constructor	Description
MappingSupport(EntityType<?> entityType, Query query, boolean resultMappingEnsured, UnknownColumnHandler unknownColumnHandler, DuplicateColumnHandler duplicateColumnHandler)

Method Summary

Modifier and Type	Method	Description
Map<Integer,MappingSupport.PropType>	createIndexMap(ResultSetMetaData resultSetMeta, Map<String,MappingSupport.PropType> columnNameMap)	Creates a mapping of result set column indices to their corresponding property types.

Methods inherited from class java.lang.Object

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

Constructor Details

MappingSupport

public MappingSupport(EntityType<?> entityType,
 Query query,
 boolean resultMappingEnsured,
 UnknownColumnHandler unknownColumnHandler,
 DuplicateColumnHandler duplicateColumnHandler)

Method Details

createIndexMap

public Map<Integer,MappingSupport.PropType> createIndexMap(ResultSetMetaData resultSetMeta,
 Map<String,MappingSupport.PropType> columnNameMap)
                                                    throws SQLException

Creates a mapping of result set column indices to their corresponding property types. This method processes the column metadata and maps each column index to a PropType, based on the provided column name to property type mapping.

Handles duplicate column names and unknown columns via the respective handlers. Throws an exception if result mapping is enforced and there are unmapped properties.

Parameters:

resultSetMeta - the metadata of the result set

columnNameMap - a map of lower-case column names to their corresponding property types

Returns:

a map where keys are result set column indices and values are the corresponding property types

Throws:

SQLException - if a database access error occurs