java.lang.Object
- org.datanucleus.metadata.MetaData
- - org.datanucleus.metadata.DiscriminatorMetaData

All Implemented Interfaces:

Serializable
```
public class DiscriminatorMetaData
extends MetaData
```
Representation of a discriminator in an inheritance strategy. Three strategies are supported
- *value-map* - where we define a value for each class as the discriminator value
- *class-name* - where we use the class name as the discriminator value
- *value-map-entity-name* - where we use the "entity" name as the discriminator value
See Also:

Serialized Form

Field Summary

Fields
Modifier and Type	Field	Description
`protected ColumnMetaData`	`columnMetaData`	Discriminator column
`protected String`	`columnName`	Column name of discriminator
`protected IndexedValue`	`indexed`	Whether the discriminator is indexed or not and whether it is unique
`protected IndexMetaData`	`indexMetaData`	Detail of any indexing of the discriminator column (optional).
`protected DiscriminatorStrategy`	`strategy`	strategy tag value.
`protected String`	`value`	Value for discriminator column, when using VALUE_MAP.

Fields inherited from class org.datanucleus.metadata.MetaData
EXTENSION_CLASS_CREATETIMESTAMP, EXTENSION_CLASS_CREATETIMESTAMP_COLUMN_NAME, EXTENSION_CLASS_CREATEUSER, EXTENSION_CLASS_CREATEUSER_COLUMN_LENGTH, EXTENSION_CLASS_CREATEUSER_COLUMN_NAME, EXTENSION_CLASS_MULTITENANCY_COLUMN_LENGTH, EXTENSION_CLASS_MULTITENANCY_COLUMN_NAME, EXTENSION_CLASS_MULTITENANCY_JDBC_TYPE, EXTENSION_CLASS_MULTITENANT, EXTENSION_CLASS_READ_ONLY, EXTENSION_CLASS_SOFTDELETE, EXTENSION_CLASS_SOFTDELETE_COLUMN_NAME, EXTENSION_CLASS_UPDATETIMESTAMP, EXTENSION_CLASS_UPDATETIMESTAMP_COLUMN_NAME, EXTENSION_CLASS_UPDATEUSER, EXTENSION_CLASS_UPDATEUSER_COLUMN_LENGTH, EXTENSION_CLASS_UPDATEUSER_COLUMN_NAME, EXTENSION_CLASS_VERSION_FIELD_NAME, EXTENSION_CLASS_VIEW_DEFINITION, EXTENSION_CLASS_VIEW_IMPORTS, EXTENSION_INDEX_COLUMN_ORDERING, EXTENSION_MEMBER_CACHEABLE, EXTENSION_MEMBER_CALENDAR_ONE_COLUMN, EXTENSION_MEMBER_CASCADE_ATTACH, EXTENSION_MEMBER_CASCADE_DETACH, EXTENSION_MEMBER_CASCADE_PERSIST, EXTENSION_MEMBER_CASCADE_REFRESH, EXTENSION_MEMBER_COMPARATOR_NAME, EXTENSION_MEMBER_CONTAINER_ALLOW_NULLS, EXTENSION_MEMBER_CREATE_TIMESTAMP, EXTENSION_MEMBER_CREATE_USER, EXTENSION_MEMBER_ENUM_VALUE_GETTER, EXTENSION_MEMBER_IMPLEMENTATION_CLASSES, EXTENSION_MEMBER_INSERTABLE, EXTENSION_MEMBER_KEY_IMPLEMENTATION_CLASSES, EXTENSION_MEMBER_LIST_ORDERING, EXTENSION_MEMBER_RELATION_DISCRIM_COLUMN, EXTENSION_MEMBER_RELATION_DISCRIM_PK, EXTENSION_MEMBER_RELATION_DISCRIM_VALUE, EXTENSION_MEMBER_STRATEGY_WHEN_NOTNULL, EXTENSION_MEMBER_TYPE_CONVERTER_DISABLED, EXTENSION_MEMBER_TYPE_CONVERTER_NAME, EXTENSION_MEMBER_UPDATE_TIMESTAMP, EXTENSION_MEMBER_UPDATE_USER, EXTENSION_MEMBER_UPDATEABLE, EXTENSION_MEMBER_VALUE_IMPLEMENTATION_CLASSES, EXTENSION_VERSION_NUMBER_INITIAL_VALUE, extensions, metaDataState, parent, VENDOR_NAME

Constructor Summary

Constructors
Constructor Description

DiscriminatorMetaData()

DiscriminatorMetaData(DiscriminatorMetaData dmd)
Copy constructor.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`ColumnMetaData`	`getColumnMetaData()`	Accessor for column MetaData.
`String`	`getColumnName()`
`IndexedValue`	`getIndexed()`
`IndexMetaData`	`getIndexMetaData()`	Accessor for indexMetaData
`DiscriminatorStrategy`	`getStrategy()`
`String`	`getValue()`
`void`	`initialise(ClassLoaderResolver clr)`	Initialisation method.
`ColumnMetaData`	`newColumnMetaData()`	Method to create a new ColumnMetaData, add it, and return it.
`IndexMetaData`	`newIndexMetaData()`	Method to create a new Index metadata, add it, and return it.
`void`	`setColumnMetaData(ColumnMetaData columnMetaData)`	Mutator for column MetaData.
`DiscriminatorMetaData`	`setColumnName(String columnName)`
`DiscriminatorMetaData`	`setIndexed(String indexed)`
`DiscriminatorMetaData`	`setIndexed(IndexedValue indexed)`
`void`	`setIndexMetaData(IndexMetaData indexMetaData)`	Mutator for the index MetaData
`DiscriminatorMetaData`	`setStrategy(String strategy)`
`DiscriminatorMetaData`	`setStrategy(DiscriminatorStrategy strategy)`
`DiscriminatorMetaData`	`setValue(String value)`
`String`	`toString()`

Methods inherited from class org.datanucleus.metadata.MetaData
addExtension, addExtensions, getExtensions, getMetaDataManager, getNoOfExtensions, getParent, getValueForExtension, getValuesForExtension, hasExtension, isInitialised, isPopulated, isUsed, removeExtension, setExtensions, setParent

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Field Detail
  - strategy
```
protected DiscriminatorStrategy strategy
```
    strategy tag value.
  - columnName
```
protected String columnName
```
    Column name of discriminator
  - columnMetaData
```
protected ColumnMetaData columnMetaData
```
    Discriminator column
  - value
```
protected String value
```
    Value for discriminator column, when using VALUE_MAP.
  - indexed
```
protected IndexedValue indexed
```
    Whether the discriminator is indexed or not and whether it is unique
  - indexMetaData
```
protected IndexMetaData indexMetaData
```
    Detail of any indexing of the discriminator column (optional).
- Constructor Detail
  - DiscriminatorMetaData
```
public DiscriminatorMetaData()
```
  - DiscriminatorMetaData
```
public DiscriminatorMetaData(DiscriminatorMetaData dmd)
```
    Copy constructor.
    
    Parameters:
    
    dmd - DiscriminatorMetaData to copy
- Method Detail
  - initialise
```
public void initialise(ClassLoaderResolver clr)
```
    Initialisation method. This should be called AFTER using the populate method if you are going to use populate. It creates the internal convenience arrays etc needed for normal operation.
    
    Overrides:
    
    initialise in class MetaData
    
    Parameters:
    
    clr - Not used
  - getColumnMetaData
```
public ColumnMetaData getColumnMetaData()
```
    Accessor for column MetaData.
    
    Returns:
    
    Returns the column MetaData.
  - setColumnMetaData
```
public void setColumnMetaData(ColumnMetaData columnMetaData)
```
    Mutator for column MetaData.
    
    Parameters:
    
    columnMetaData - The column MetaData to set.
  - newColumnMetaData
```
public ColumnMetaData newColumnMetaData()
```
    Method to create a new ColumnMetaData, add it, and return it.
    
    Returns:
    
    The Column metadata
  - getIndexMetaData
```
public final IndexMetaData getIndexMetaData()
```
    Accessor for indexMetaData
    
    Returns:
    
    Returns the indexMetaData.
  - setIndexMetaData
```
public final void setIndexMetaData(IndexMetaData indexMetaData)
```
    Mutator for the index MetaData
    
    Parameters:
    
    indexMetaData - The indexMetaData to set.
  - newIndexMetaData
```
public IndexMetaData newIndexMetaData()
```
    Method to create a new Index metadata, add it, and return it.
    
    Returns:
    
    The Index metadata
  - getValue
```
public String getValue()
```
  - setValue
```
public DiscriminatorMetaData setValue(String value)
```
  - getColumnName
```
public String getColumnName()
```
  - setColumnName
```
public DiscriminatorMetaData setColumnName(String columnName)
```
  - getStrategy
```
public final DiscriminatorStrategy getStrategy()
```
  - setStrategy
```
public DiscriminatorMetaData setStrategy(DiscriminatorStrategy strategy)
```
  - setStrategy
```
public DiscriminatorMetaData setStrategy(String strategy)
```
  - getIndexed
```
public IndexedValue getIndexed()
```
  - setIndexed
```
public DiscriminatorMetaData setIndexed(IndexedValue indexed)
```
  - setIndexed
```
public DiscriminatorMetaData setIndexed(String indexed)
```
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object

Constructor	Description
`DiscriminatorMetaData()`
`DiscriminatorMetaData(DiscriminatorMetaData dmd)`	Copy constructor.

Class DiscriminatorMetaData

Field Summary

Fields inherited from class org.datanucleus.metadata.MetaData

Constructor Summary

Method Summary

Methods inherited from class org.datanucleus.metadata.MetaData

Methods inherited from class java.lang.Object

Field Detail

strategy

columnName

columnMetaData

value

indexed

indexMetaData

Constructor Detail

DiscriminatorMetaData

DiscriminatorMetaData

Method Detail

initialise

getColumnMetaData

setColumnMetaData

newColumnMetaData

getIndexMetaData

setIndexMetaData

newIndexMetaData

getValue

setValue

getColumnName

setColumnName

getStrategy

setStrategy

setStrategy

getIndexed

setIndexed

setIndexed

toString