org.apache.openjpa.meta
Interface ValueMetaData

All Superinterfaces:

MetaDataContext, MetaDataModes, Serializable

All Known Subinterfaces:

ValueMapping

All Known Implementing Classes:

FieldMapping, FieldMetaData, ValueMappingImpl, ValueMetaDataImpl

public interface ValueMetaData
extends MetaDataContext, MetaDataModes, Serializable

Holds metadata on a value; this could be a field value, key value, or element value.

Since:

0.4.0

Author:

Abe White

Field Summary

static int	CASCADE_AUTO Use automatic cascade behavior.
static int	CASCADE_IMMEDIATE The operation is immediately cascaded to this field.
static int	CASCADE_NONE The operation is not cascaded to this field.
static String	MAPPED_BY_PK Marker to set on setValueMappedBy(java.lang.String) to denote that the map key is mapped by the primary key field of the value.

Fields inherited from interface org.apache.openjpa.meta.MetaDataModes

MODE_MAPPING, MODE_MAPPING_INIT, MODE_META, MODE_NONE, MODE_QUERY

Method Summary

ClassMetaData	addEmbeddedMetaData() Add embedded metadata for this value.
void	copy(ValueMetaData vmd) Copy state from the given value to this one.
int	getCascadeAttach() Cascade behavior for attach operation.
int	getCascadeDelete() Cascade behavior for delete operation.
int	getCascadePersist() Cascade behavior for persist operation.
int	getCascadeRefresh() Cascade behavior for refresh operation.
Class	getDeclaredType() Return the declared class of the value.
int	getDeclaredTypeCode() Return the declared type code of the value.
ClassMetaData	getDeclaredTypeMetaData() Return metadata for the value's class, if the type is persistent.
ClassMetaData	getEmbeddedMetaData() The embedded class metadata for the value.
FieldMetaData	getFieldMetaData() Return the owning field for this value.
int	getResolve() Resolve mode for metadata.
Class	getType() The value class.
int	getTypeCode() The type code of the value class.
ClassMetaData	getTypeMetaData() The metadata for the value class, if the type is persistent.
Class	getTypeOverride() User-supplied type overriding assumed type based on field.
String	getValueMappedBy() The field that this value shares a mapping with.
FieldMetaData	getValueMappedByMetaData() The field that this value shares a mapping with.
boolean	isDeclaredTypePC() Whether the type is a persistence capable instance.
boolean	isEmbedded() This attribute is a hint to the implementation to store this value in the same structure as the class, rather than as a separate datastore structure.
boolean	isEmbeddedPC() Whether this is an embedded persistence capable value.
boolean	isSerialized() Whether this value is serialized when stored.
boolean	isTypePC() Whether the type is a persistence capable instance.
boolean	resolve(int mode) Resolve and validate metadata.
void	setCascadeAttach(int cascade) Cascade behavior for attach operation.
void	setCascadeDelete(int cascade) Cascade behavior for deletion.
void	setCascadePersist(int cascade) Cascade behavior for persist operation.
void	setCascadeRefresh(int cascade) Cascade behavior for refresh operation.
void	setDeclaredType(Class type) Set the declared class of the value.
void	setDeclaredTypeCode(int type) Set the type code for the value.
void	setEmbedded(boolean embedded) This attribute is a hint to the implementation to store this value in the same structure as the class, rather than as a separate datastore structure.
void	setResolve(int mode) Resolve mode for metadata.
void	setResolve(int mode, boolean on) Resolve mode for metadata.
void	setSerialized(boolean serialized) Whether this value is serialized when stored.
void	setType(Class type) The value class.
void	setTypeCode(int code) The type code of the value class.
void	setTypeOverride(Class type) User-supplied type overriding assumed type based on field.
void	setValueMappedBy(String mapped) The field that this value shares a mapping with.

Methods inherited from interface org.apache.openjpa.meta.MetaDataContext

getRepository

Field Detail

CASCADE_NONE

static final int CASCADE_NONE

The operation is not cascaded to this field.

See Also:

Constant Field Values

CASCADE_IMMEDIATE

static final int CASCADE_IMMEDIATE

The operation is immediately cascaded to this field.

See Also:

Constant Field Values

CASCADE_AUTO

static final int CASCADE_AUTO

Use automatic cascade behavior. Persistence-by-reachability, delete-dependent, attach-if-detached, etc.

See Also:

Constant Field Values

MAPPED_BY_PK

static final String MAPPED_BY_PK

Marker to set on setValueMappedBy(java.lang.String) to denote that the map key is mapped by the primary key field of the value.

See Also:

Constant Field Values

Method Detail

getFieldMetaData

FieldMetaData getFieldMetaData()

Return the owning field for this value.

getType

Class getType()

The value class.

setType

void setType(Class type)

The value class.

getTypeCode

int getTypeCode()

The type code of the value class.

setTypeCode

void setTypeCode(int code)

The type code of the value class.

isTypePC

boolean isTypePC()

Whether the type is a persistence capable instance.

getTypeMetaData

ClassMetaData getTypeMetaData()

The metadata for the value class, if the type is persistent.

getDeclaredType

Class getDeclaredType()

Return the declared class of the value. This can differ from the return value of getType() if the user indicates a different type or the value has an externalizer.

setDeclaredType

void setDeclaredType(Class type)

Set the declared class of the value.

getDeclaredTypeCode

int getDeclaredTypeCode()

Return the declared type code of the value. This can differ from the return value of getTypeCode() if the user indicates a different type or the value has an externalizer.

setDeclaredTypeCode

void setDeclaredTypeCode(int type)

Set the type code for the value. The type code is usually computed automatically, but it can be useful to set it explicitly when creating metadatas from scratch.

isDeclaredTypePC

boolean isDeclaredTypePC()

Whether the type is a persistence capable instance.

getDeclaredTypeMetaData

ClassMetaData getDeclaredTypeMetaData()

Return metadata for the value's class, if the type is persistent.

isEmbedded

boolean isEmbedded()

This attribute is a hint to the implementation to store this value in the same structure as the class, rather than as a separate datastore structure. Defaults to true if the field is not a collection or map or persistence-capable object; defaults to false otherwise. Implementations are permitted to ignore this attribute.

setEmbedded

void setEmbedded(boolean embedded)

This attribute is a hint to the implementation to store this value in the same structure as the class, rather than as a separate datastore structure. Defaults to true if the field is not a collection or map or persistence-capable objects; defaults to false otherwise. Implementations are permitted to ignore this attribute.

isEmbeddedPC

boolean isEmbeddedPC()

Whether this is an embedded persistence capable value.

getEmbeddedMetaData

ClassMetaData getEmbeddedMetaData()

The embedded class metadata for the value.

addEmbeddedMetaData

ClassMetaData addEmbeddedMetaData()

Add embedded metadata for this value.

getCascadeDelete

int getCascadeDelete()

Cascade behavior for delete operation. Only applies to persistence-capable values. Options are:

• CASCADE_NONE: No cascades.
• CASCADE_IMMEDIATE: Value is deleted immediately when the owning object is deleted.
• CASCADE_AUTO: Value will be deleted on flush if the owning object is deleted or if the value is removed from the owning object, and if the value is not assigned to another relation in the same transaction.

setCascadeDelete

void setCascadeDelete(int cascade)

Cascade behavior for deletion.

See Also:

getCascadeDelete()

getCascadePersist

int getCascadePersist()

Cascade behavior for persist operation. Only applies to persistence-capable values. Options are:

• CASCADE_NONE: No cascades. If a transient relation is held at flush, an error is thrown.
• CASCADE_IMMEDIATE: Value is persisted immediately when the owning object is persisted.
• CASCADE_AUTO: Value will be persisted on flush.

setCascadePersist

void setCascadePersist(int cascade)

Cascade behavior for persist operation.

See Also:

getCascadePersist()

getCascadeAttach

int getCascadeAttach()

Cascade behavior for attach operation. Only applies to persistence-capable values. Options are:

• CASCADE_NONE: No cascades of attach. Relation remains detached.
• CASCADE_IMMEDIATE: Value is attached immediately.

setCascadeAttach

void setCascadeAttach(int cascade)

Cascade behavior for attach operation.

See Also:

getCascadeAttach()

getCascadeRefresh

int getCascadeRefresh()

Cascade behavior for refresh operation. Only applies to persistence-capable values. Options are:

• CASCADE_NONE: No cascades of refresh.
• CASCADE_IMMEDIATE: Persistent value object is also refreshed.
• CASCADE_AUTO: Value will be refreshed if it is in the current fetch groups.

setCascadeRefresh

void setCascadeRefresh(int cascade)

Cascade behavior for refresh operation.

See Also:

getCascadeRefresh()

isSerialized

boolean isSerialized()

Whether this value is serialized when stored.

setSerialized

void setSerialized(boolean serialized)

Whether this value is serialized when stored.

getValueMappedBy

String getValueMappedBy()

The field that this value shares a mapping with. Currently the only supported use for a mapped-by value is when a map field key is determined by a field of the persistence-capable map value.

setValueMappedBy

void setValueMappedBy(String mapped)

The field that this value shares a mapping with. Currently the only supported use for a mapped-by value is when a map field key is determined by a field of the persistence-capable map value.

getValueMappedByMetaData

FieldMetaData getValueMappedByMetaData()

The field that this value shares a mapping with. Currently the only supported use for a mapped-by value is when a map field key is determined by a field of the persistence-capable map value.

getTypeOverride

Class getTypeOverride()

User-supplied type overriding assumed type based on field.

setTypeOverride

void setTypeOverride(Class type)

User-supplied type overriding assumed type based on field.

getResolve

int getResolve()

Resolve mode for metadata.

setResolve

void setResolve(int mode)

Resolve mode for metadata.

setResolve

void setResolve(int mode,
                boolean on)

Resolve mode for metadata.

resolve

boolean resolve(int mode)

Resolve and validate metadata. Return true if already resolved.

copy

void copy(ValueMetaData vmd)

Copy state from the given value to this one. Do not copy mapping information.