Package org.datanucleus.store.schema.table

Class MemberColumnMappingImpl

java.lang.Object

org.datanucleus.store.schema.table.MemberColumnMappingImpl

All Implemented Interfaces:

MemberColumnMapping

public class MemberColumnMappingImpl
extends Object
implements MemberColumnMapping

Mapping definition for a member (field/property) representing the column(s) that it maps to. This class is required as an intermediary between Table and Column so that we can support mapping a member to multiple columns.

Field Summary

Fields

Modifier and Type	Field	Description
protected Column[]	columns
protected Map<FieldRole,TypeConverter>	componentConverters
protected AbstractMemberMetaData	mmd
protected TypeConverter	typeConverter

Constructor Summary

Constructors

Constructor	Description
MemberColumnMappingImpl(AbstractMemberMetaData mmd, Column col)
MemberColumnMappingImpl(AbstractMemberMetaData mmd, Column[] cols, TypeConverter typeConv)

Method Summary

Modifier and Type	Method	Description
Column	getColumn(int position)	Accessor for the column at the specified position.
Column[]	getColumns()	Accessor for the columns representing this member.
AbstractMemberMetaData	getMemberMetaData()	Accessor for the metadata for this member.
int	getNumberOfColumns()	Accessor for the number of columns that represents this member.
TypeConverter	getTypeConverter()	Accessor for the TypeConverter to use for this member-column (if any).
TypeConverter	getTypeConverterForComponent(FieldRole role)	Accessor for a component (collection element, map key, map value) converter if defined.
void	setTypeConverter(TypeConverter typeConv)	Method to set the TypeConverter used by this member-column.
void	setTypeConverterForComponent(FieldRole role, TypeConverter conv)	Method to set a component TypeConverter for such as a collection element, map key or map value.
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

mmd

protected AbstractMemberMetaData mmd

typeConverter

protected TypeConverter typeConverter

componentConverters

protected Map<FieldRole,TypeConverter> componentConverters

columns

protected Column[] columns

Constructor Detail

MemberColumnMappingImpl

public MemberColumnMappingImpl(AbstractMemberMetaData mmd,
                               Column col)

MemberColumnMappingImpl

public MemberColumnMappingImpl(AbstractMemberMetaData mmd,
                               Column[] cols,
                               TypeConverter typeConv)

Method Detail

setTypeConverter

public void setTypeConverter(TypeConverter typeConv)

Description copied from interface: MemberColumnMapping

Method to set the TypeConverter used by this member-column.

Specified by:

setTypeConverter in interface MemberColumnMapping

Parameters:

typeConv - The TypeConverter to use

setTypeConverterForComponent

public void setTypeConverterForComponent(FieldRole role,
                                         TypeConverter conv)

Description copied from interface: MemberColumnMapping

Method to set a component TypeConverter for such as a collection element, map key or map value.

Specified by:

setTypeConverterForComponent in interface MemberColumnMapping

Parameters:

role - The role where this converter is used

conv - The converter

getMemberMetaData

public AbstractMemberMetaData getMemberMetaData()

Description copied from interface: MemberColumnMapping

Accessor for the metadata for this member.

Specified by:

getMemberMetaData in interface MemberColumnMapping

Returns:

Metadata for the member.

getColumn

public Column getColumn(int position)

Description copied from interface: MemberColumnMapping

Accessor for the column at the specified position. 0 is the first column. If the position is out of range then returns null;

Specified by:

getColumn in interface MemberColumnMapping

Parameters:

position - The position, with origin 0

Returns:

The Column

getColumns

public Column[] getColumns()

Description copied from interface: MemberColumnMapping

Accessor for the columns representing this member.

Specified by:

getColumns in interface MemberColumnMapping

Returns:

The columns

getNumberOfColumns

public int getNumberOfColumns()

Description copied from interface: MemberColumnMapping

Accessor for the number of columns that represents this member.

Specified by:

getNumberOfColumns in interface MemberColumnMapping

Returns:

Number of columns

getTypeConverter

public TypeConverter getTypeConverter()

Description copied from interface: MemberColumnMapping

Accessor for the TypeConverter to use for this member-column (if any).

Specified by:

getTypeConverter in interface MemberColumnMapping

Returns:

The TypeConverter

getTypeConverterForComponent

public TypeConverter getTypeConverterForComponent(FieldRole role)

Description copied from interface: MemberColumnMapping

Accessor for a component (collection element, map key, map value) converter if defined.

Specified by:

getTypeConverterForComponent in interface MemberColumnMapping

Parameters:

role - The role of the component where the converter would be used

Returns:

The converter (if any). Null is returned if nothing defined

toString

public String toString()

Overrides:

toString in class Object