kodo.meta
Class ClassMetaData

java.lang.Object
  Extensions
      kodo.meta.ClassMetaData

All Implemented Interfaces:

Comparable

public class ClassMetaData
extends Extensions
implements Comparable

Contains metadata about a persistent type. This metadata is available both at enhancement time and runtime.

Note that this class employs aggressive caching, and therefore it is important to finalize the configuration of field metadatas before invoking methods that depend on that configuration, such as getPrimaryKeyFields().

Field Summary

static int	ACCESS_FIELD Persistent attributes are accessed via direct field access.
static int	ACCESS_PROPERTY Persistent attributes are accessed via setters and getters.
static int	ACCESS_UNKNOWN Unknown access type.
protected static String	DEFAULT_STRING
static int	ID_APPLICATION Application identity type.
static int	ID_DATASTORE Datastore identity type.
static int	ID_UNKNOWN Unkonwn identity type.
static String	SYNTHETIC Value for using a synthetic detached state field, which is the default.

Constructor Summary

protected	ClassMetaData(Class type, MetaDataRepository repos) Constructor.
protected	ClassMetaData(ValueMetaData owner) Embedded constructor.

Method Summary

FieldMetaData	addDeclaredField(String name, Class type) Add a new field metadata to this class.
void	addDeclaredLockGroup(LockGroup lg) Declare a lock group possibly used by subclass fields.
FieldMetaData	addDefinedSuperclassField(String name, Class type, Class sup) Add a new defined superclass field metadata to this class.
protected void	addExtensionKeys(Collection exts)
protected void	clearAllFieldCache() Clear cached field data.
protected void	clearDefinedFieldCache() Clear defined field data.
protected void	clearFieldCache() Clear cached field data.
protected void	clearSubclassCache() Clear cached subclass data.
int	compareTo(Object other)
void	copy(ClassMetaData meta) Copy the metadata from the given instance to this one.
void	defineSuperclassFields(boolean force) Incorporate superclass fields redefined in this subclass into this metadata.
boolean	equals(Object other)
int	getAccessType() The access type used by this class.
String[]	getComments()
DataCache	getDataCache() Return the data cache for this class, or null if it is not cachable.
String	getDataCacheName() The name of the datacache to use for this class, or null if none.
int	getDataCacheTimeout() The cache timeout for this class.
FieldMetaData	getDeclaredField(int index) Return the metadata for the persistent or transactional field with the given relative index.
FieldMetaData	getDeclaredField(String name) Return the metadata for the persistent or transactional field with the given name, without including superclass fields.
FieldMetaData[]	getDeclaredFields() Return only the fields for this class, without superclass fields.
FieldMetaData[]	getDeclaredUnmanagedFields() Return any fields that were added as non-managed.
FieldMetaData[]	getDefaultFetchGroupFields() Return the list of fields in the default fetch group, including superclass fields, or an empty array if none.
FieldMetaData[]	getDefinedFields() Returns an array of all the fields defined by this class.
FieldMetaData[]	getDefinedFieldsInListingOrder() Returns all fields defined by this class in the order they are listed in the metadata file.
FieldMetaData	getDefinedSuperclassField(String name) Return the defined superclass field with the given name, or null if none.
Class	getDescribedType() The persistence capable class described by this metadata.
String	getDetachedState() The name of the detach state field, or null if none.
Field	getDetachedStateField() Return the detach state field, or null if none.
ValueMetaData	getEmbeddingMetaData() If this metadata is for an embedded object, returning the owning value.
ClassLoader	getEnvClassLoader() The environmental loader used when loading this metadata.
int	getExtraFieldDataIndex(int field) Return the impl / intermediate field data index of the given field in the compacted array, or -1 if the field does not use extra data.
int	getExtraFieldDataLength() Return the number of fields that use impl or intermediate data, in order to create a compacted array for storage of said data.
FieldMetaData	getField(int index) Return the metadata for the persistent or transactional field with the given absolute index.
FieldMetaData	getField(String name) Return the metadata for the persistent or transactional field with the given name.
FieldMetaData[]	getFields() Return all field metadatas, including superclass fields.
FieldMetaData[]	getFieldsInListingOrder() Returns all fields in the order they are listed in the metadata file.
SequenceMetaData	getIdentitySequenceMetaData() Metadata for the datastore identity sequence.
String	getIdentitySequenceName() The datastore identity sequence name, or null for none.
int	getIdentityStrategy() The strategy to use for datastore identity generation.
int	getIdentityType() The type of identity being used.
LifecycleMetaData	getLifecycleMetaData() Information about lifecycle callbacks for this class.
int	getListingIndex() The index in which this class was listed in the metadata.
LockGroup[]	getLockGroups() Return the lock groups for this class.
ClassMetaData[]	getMappedPCSubclassMetaDatas() Return all mapped subclasses.
ClassMetaData	getMappedPCSuperclassMetaData() Return the closest mapped superclass.
Class	getObjectIdType() The metadata-specified class to use for the object ID.
Class[]	getPCSubclasses() Return the known persistence capable subclasses of the described type, or empty array if none or if this is embedded metadata.
ClassMetaData[]	getPCSubclassMetaDatas() Return the metadata for the known persistence capable subclasses of the described type, or empty array if none or if this is embedded metadata.
Class	getPCSuperclass() The persistence capable superclass of the described type.
ClassMetaData	getPCSuperclassMetaData() The metadata for this class' superclass.
FieldMetaData[]	getPrimaryKeyFields() Return primary key fields, or empty array if none.
MetaDataRepository	getRepository() Return the owning repository.
boolean	getRequiresExtent() Whether the type requires extent management.
int	getResolve() The resolve mode for this metadata.
String	getResourceName()
File	getSourceFile()
int	getSourceMode() The source mode this metadata has been loaded under.
Object	getSourceScope()
int	getSourceType()
protected FieldMetaData	getSuperclassField(FieldMetaData supField) Return the superclass copy of the given field.
String	getTypeAlias() Returns the alias for the described type, or null if none has been set.
FieldMetaData	getVersionField() Return the version field for this class, if any.
int	hashCode()
protected void	initializeMapping() Initialize mapping.
boolean	isAccessibleField(String field) Return whether the given name represents a managed or static field of this class, including superclass fields.
boolean	isAuditable() Whether this class is auditable.
boolean	isDetachable() Whether instances are detachable.
boolean	isEmbeddedOnly() Whether the type can only be used as an embedded object.
boolean	isKodoIdentity() Whether this type uses Kodo identity.
boolean	isMapped() Whether this class is mapped to the datastore.
boolean	isObjectIdTypeShared() Whether this type uses an application identity class that is shared with other classes, and is therefore wrapped in an ObjectId.
boolean	removeDeclaredField(FieldMetaData field) Remove the given field from management.
boolean	removeDeclaredLockGroup(LockGroup lg) Remove the given lock group from this class.
boolean	removeDefinedSuperclassField(FieldMetaData field) Remove the given field from management.
boolean	resolve(int mode) Resolve and validate metadata.
protected void	resolveMapping(boolean runtime) Resolve mapping data.
protected void	resolveMeta(boolean runtime) Resolve metadata.
void	setAccessType(int type) The access type used by this class.
void	setAuditable(boolean auditable) Whether this class is auditable.
void	setComments(String[] comments)
void	setDataCacheName(String name) Set the cache name for this class.
void	setDataCacheTimeout(int timeout) The cache timeout for this class.
protected void	setDescribedType(Class type) Set the class descibed by this metadata.
void	setDetachable(boolean detachable) Whether instances are detachable.
void	setDetachedState(String field) The name of the detach state field, or null if none.
void	setEmbeddedOnly(boolean embed) Whether the type can only be used as an embedded object.
void	setEnvClassLoader(ClassLoader loader) The class environmental loader used when loading this metadata.
void	setIdentitySequenceName(String seqName) The datastore identity sequence name, or null for none.
void	setIdentityStrategy(int strategy) The strategy to use for datastore identity generation.
void	setIdentityType(int type) The type of identity being used.
void	setListingIndex(int index) The index in which this field was listed in the metadata.
void	setObjectIdType(Class cls, boolean shared) The metadata-specified class to use for the object ID.
void	setPCSuperclass(Class pc) The persistence capable superclass of the described type.
void	setPCSuperclassMetaData(ClassMetaData meta) The metadata for this class' superclass.
void	setRequiresExtent(boolean req) Whether the type requires extent management.
void	setResolve(int mode) The resolve mode for this metadata.
void	setResolve(int mode, boolean on) The resolve mode for this metadata.
void	setSource(File file, int srcType)
void	setSourceMode(int mode) The source mode this metadata has been loaded under.
void	setSourceMode(int mode, boolean on) The source mode this metadata has been loaded under.
void	setTypeAlias(String alias) Sets the alias for the described type.
String	toString()
Boolean	usesDetachedState() Whether an instance of this type has detached state.
protected void	validateMapping(boolean runtime) Validate mapping data.
protected void	validateMeta(boolean runtime) Validate resolved metadata.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

ID_UNKNOWN

public static final int ID_UNKNOWN

Unkonwn identity type.

See Also:

Constant Field Values

ID_DATASTORE

public static final int ID_DATASTORE

Datastore identity type.

See Also:

Constant Field Values

ID_APPLICATION

public static final int ID_APPLICATION

Application identity type.

See Also:

Constant Field Values

ACCESS_UNKNOWN

public static final int ACCESS_UNKNOWN

Unknown access type.

See Also:

Constant Field Values

ACCESS_FIELD

public static final int ACCESS_FIELD

Persistent attributes are accessed via direct field access. Bit flag.

See Also:

Constant Field Values

ACCESS_PROPERTY

public static final int ACCESS_PROPERTY

Persistent attributes are accessed via setters and getters. Bit flag.

See Also:

Constant Field Values

SYNTHETIC

public static final String SYNTHETIC

Value for using a synthetic detached state field, which is the default.

See Also:

Constant Field Values

DEFAULT_STRING

protected static final String DEFAULT_STRING

See Also:

Constant Field Values

Constructor Detail

ClassMetaData

protected ClassMetaData(Class type,
                        MetaDataRepository repos)

Constructor. Supply described type and repository.

ClassMetaData

protected ClassMetaData(ValueMetaData owner)

Embedded constructor. Supply embedding value.

Method Detail

getRepository

public MetaDataRepository getRepository()

Return the owning repository.

getEmbeddingMetaData

public ValueMetaData getEmbeddingMetaData()

If this metadata is for an embedded object, returning the owning value.

getDescribedType

public Class getDescribedType()

The persistence capable class described by this metadata.

setDescribedType

protected void setDescribedType(Class type)

Set the class descibed by this metadata. The type may be reset when an embedded value changes its declared type.

getEnvClassLoader

public ClassLoader getEnvClassLoader()

The environmental loader used when loading this metadata. The class metadata should use this loader when loading metadata for its superclass and field types.

setEnvClassLoader

public void setEnvClassLoader(ClassLoader loader)

The class environmental loader used when loading this metadata. The class metadata should use this loader when loading metadata for its superclass and field types.

getPCSuperclass

public Class getPCSuperclass()

The persistence capable superclass of the described type.

setPCSuperclass

public void setPCSuperclass(Class pc)

The persistence capable superclass of the described type.

getPCSuperclassMetaData

public ClassMetaData getPCSuperclassMetaData()

The metadata for this class' superclass.

setPCSuperclassMetaData

public void setPCSuperclassMetaData(ClassMetaData meta)

The metadata for this class' superclass.

isMapped

public boolean isMapped()

Whether this class is mapped to the datastore. By default, only returns false if class is embedded-only, but subclasses might override to allow unmapped other types.

getMappedPCSuperclassMetaData

public ClassMetaData getMappedPCSuperclassMetaData()

Return the closest mapped superclass.

getPCSubclasses

public Class[] getPCSubclasses()

Return the known persistence capable subclasses of the described type, or empty array if none or if this is embedded metadata.

getPCSubclassMetaDatas

public ClassMetaData[] getPCSubclassMetaDatas()

Return the metadata for the known persistence capable subclasses of the described type, or empty array if none or if this is embedded metadata.

getMappedPCSubclassMetaDatas

public ClassMetaData[] getMappedPCSubclassMetaDatas()

Return all mapped subclasses.

getIdentityType

public int getIdentityType()

The type of identity being used. This will be one of:

• ID_UNKNOWN: unknown identity type
• ID_DATASTORE: identity managed by the data store and independent of the fields of the instance
• ID_APPLICATION: identity managed by the application and defined by one or more fields of the instance

If unspecified, defaults to ID_DATASTORE if there are no primary key fields, and ID_APPLICATION otherwise.

setIdentityType

public void setIdentityType(int type)

The type of identity being used. This will be one of:

• ID_UNKNOWN: unknown identity type
• ID_DATASTORE: identity managed by the data store and independent of the fields of the instance
• ID_APPLICATION: identity managed by the application and defined by one or more fields of the instance

If unspecified, defaults to ID_DATASTORE if there are no primary key fields, and ID_APPLICATION otherwise.

getObjectIdType

public Class getObjectIdType()

The metadata-specified class to use for the object ID.

setObjectIdType

public void setObjectIdType(Class cls,
                            boolean shared)

The metadata-specified class to use for the object ID.

isObjectIdTypeShared

public boolean isObjectIdTypeShared()

Whether this type uses an application identity class that is shared with other classes, and is therefore wrapped in an ObjectId.

isKodoIdentity

public boolean isKodoIdentity()

Whether this type uses Kodo identity.

getIdentityStrategy

public int getIdentityStrategy()

The strategy to use for datastore identity generation. One of the constants from ValueStrategies.

setIdentityStrategy

public void setIdentityStrategy(int strategy)

The strategy to use for datastore identity generation. One of the constants from ValueStrategies.

getIdentitySequenceName

public String getIdentitySequenceName()

The datastore identity sequence name, or null for none.

setIdentitySequenceName

public void setIdentitySequenceName(String seqName)

The datastore identity sequence name, or null for none.

getIdentitySequenceMetaData

public SequenceMetaData getIdentitySequenceMetaData()

Metadata for the datastore identity sequence.

getLifecycleMetaData

public LifecycleMetaData getLifecycleMetaData()

Information about lifecycle callbacks for this class.

getTypeAlias

public String getTypeAlias()

Returns the alias for the described type, or null if none has been set. #see setTypeAlias

setTypeAlias

public void setTypeAlias(String alias)

Sets the alias for the described type. The alias can be any arbitrary string that the implementation can later use to refer to the class.

Parameters:

alias - the alias name to apply to the described type

getAccessType

public int getAccessType()

The access type used by this class. Either ACCESS_FIELD or ACCESS_PROPERTY.

setAccessType

public void setAccessType(int type)

The access type used by this class. Must be either ACCESS_FIELD or ACCESS_PROPERTY.

getRequiresExtent

public boolean getRequiresExtent()

Whether the type requires extent management.

setRequiresExtent

public void setRequiresExtent(boolean req)

Whether the type requires extent management.

isEmbeddedOnly

public boolean isEmbeddedOnly()

Whether the type can only be used as an embedded object.

setEmbeddedOnly

public void setEmbeddedOnly(boolean embed)

Whether the type can only be used as an embedded object.

getLockGroups

public LockGroup[] getLockGroups()

Return the lock groups for this class. Currently, all lock groups must be defined in the least-derived mapped type. The lock groups will be returned in alphabetical order.

addDeclaredLockGroup

public void addDeclaredLockGroup(LockGroup lg)

Declare a lock group possibly used by subclass fields.

removeDeclaredLockGroup

public boolean removeDeclaredLockGroup(LockGroup lg)

Remove the given lock group from this class.

getExtraFieldDataLength

public int getExtraFieldDataLength()

Return the number of fields that use impl or intermediate data, in order to create a compacted array for storage of said data.

getExtraFieldDataIndex

public int getExtraFieldDataIndex(int field)

Return the impl / intermediate field data index of the given field in the compacted array, or -1 if the field does not use extra data.

See Also:

getExtraFieldDataLength()

isAccessibleField

public boolean isAccessibleField(String field)

Return whether the given name represents a managed or static field of this class, including superclass fields.

getFields

public FieldMetaData[] getFields()

Return all field metadatas, including superclass fields.

getSuperclassField

protected FieldMetaData getSuperclassField(FieldMetaData supField)

Return the superclass copy of the given field.

getDeclaredFields

public FieldMetaData[] getDeclaredFields()

Return only the fields for this class, without superclass fields.

getPrimaryKeyFields

public FieldMetaData[] getPrimaryKeyFields()

Return primary key fields, or empty array if none. The order in which the keys are returned will be the order in which the fields are declared, starting at the least-derived superclass and ending with the primary key fields of the most-derived subclass.

getDefaultFetchGroupFields

public FieldMetaData[] getDefaultFetchGroupFields()

Return the list of fields in the default fetch group, including superclass fields, or an empty array if none.

getVersionField

public FieldMetaData getVersionField()

Return the version field for this class, if any.

getField

public FieldMetaData getField(int index)

Return the metadata for the persistent or transactional field with the given absolute index.

Returns:

the field's metadata, or null if not found

getDeclaredField

public FieldMetaData getDeclaredField(int index)

Return the metadata for the persistent or transactional field with the given relative index.

Returns:

the field's metadata, or null if not found

getField

public FieldMetaData getField(String name)

Return the metadata for the persistent or transactional field with the given name.

Returns:

the field's metadata, or null if not found

getDeclaredField

public FieldMetaData getDeclaredField(String name)

Return the metadata for the persistent or transactional field with the given name, without including superclass fields.

Returns:

the field's metadata, or null if not found

getDeclaredUnmanagedFields

public FieldMetaData[] getDeclaredUnmanagedFields()

Return any fields that were added as non-managed. All other methods to get fields return only those that are managed.

addDeclaredField

public FieldMetaData addDeclaredField(String name,
                                      Class type)

Add a new field metadata to this class.

removeDeclaredField

public boolean removeDeclaredField(FieldMetaData field)

Remove the given field from management.

Returns:

true if the field was removed, false otherwise

getDefinedSuperclassField

public FieldMetaData getDefinedSuperclassField(String name)

Return the defined superclass field with the given name, or null if none.

addDefinedSuperclassField

public FieldMetaData addDefinedSuperclassField(String name,
                                               Class type,
                                               Class sup)

Add a new defined superclass field metadata to this class.

removeDefinedSuperclassField

public boolean removeDefinedSuperclassField(FieldMetaData field)

Remove the given field from management.

Returns:

true if the field was removed, false otherwise

defineSuperclassFields

public void defineSuperclassFields(boolean force)

Incorporate superclass fields redefined in this subclass into this metadata. This method is generally called after metadata is resolved and mapping information is loaded, but before mapping resolve.

Parameters:

force - whether to force re-mapping of even mapped superclass fields

getDefinedFields

public FieldMetaData[] getDefinedFields()

Returns an array of all the fields defined by this class. This includes mapped declared fields and any concrete mapping of unmapped superclass fields performed by this class.

getFieldsInListingOrder

public FieldMetaData[] getFieldsInListingOrder()

Returns all fields in the order they are listed in the metadata file. Unlisted fields are placed after listed ones.

getDefinedFieldsInListingOrder

public FieldMetaData[] getDefinedFieldsInListingOrder()

Returns all fields defined by this class in the order they are listed in the metadata file. Unlisted fields are placed after listed ones. This array includes declared transactional and unmanaged fields.

getDataCacheName

public String getDataCacheName()

The name of the datacache to use for this class, or null if none.

setDataCacheName

public void setDataCacheName(String name)

Set the cache name for this class. Set to null to disable caching.

getDataCacheTimeout

public int getDataCacheTimeout()

The cache timeout for this class. -1 indicates no timeout.

setDataCacheTimeout

public void setDataCacheTimeout(int timeout)

The cache timeout for this class. -1 indicates no timeout.

getDataCache

public DataCache getDataCache()

Return the data cache for this class, or null if it is not cachable.

isDetachable

public boolean isDetachable()

Whether instances are detachable.

setDetachable

public void setDetachable(boolean detachable)

Whether instances are detachable.

getDetachedState

public String getDetachedState()

The name of the detach state field, or null if none.

setDetachedState

public void setDetachedState(String field)

The name of the detach state field, or null if none.

getDetachedStateField

public Field getDetachedStateField()

Return the detach state field, or null if none.

usesDetachedState

public Boolean usesDetachedState()

Whether an instance of this type has detached state.

Returns:

true if a detached instance must have detached state, false if it does not, and null if it may use a manually-constructed instance without detached state

isAuditable

public boolean isAuditable()

Whether this class is auditable.

setAuditable

public void setAuditable(boolean auditable)

Whether this class is auditable.

clearAllFieldCache

protected void clearAllFieldCache()

Clear cached field data.

clearDefinedFieldCache

protected void clearDefinedFieldCache()

Clear defined field data.

clearFieldCache

protected void clearFieldCache()

Clear cached field data.

clearSubclassCache

protected void clearSubclassCache()

Clear cached subclass data.

hashCode

public int hashCode()

equals

public boolean equals(Object other)

compareTo

public int compareTo(Object other)

Specified by:

compareTo in interface Comparable

toString

public String toString()

getResolve

public int getResolve()

The resolve mode for this metadata.

setResolve

public void setResolve(int mode)

The resolve mode for this metadata.

setResolve

public void setResolve(int mode,
                       boolean on)

The resolve mode for this metadata.

resolve

public boolean resolve(int mode)

Resolve and validate metadata. Return true if already resolved.

resolveMeta

protected void resolveMeta(boolean runtime)

Resolve metadata.

validateMeta

protected void validateMeta(boolean runtime)

Validate resolved metadata.

resolveMapping

protected void resolveMapping(boolean runtime)

Resolve mapping data. Logs resolve message and resolves super by default.

validateMapping

protected void validateMapping(boolean runtime)

Validate mapping data.

initializeMapping

protected void initializeMapping()

Initialize mapping. Logs init message by default.

getSourceFile

public File getSourceFile()

getSourceScope

public Object getSourceScope()

getSourceType

public int getSourceType()

setSource

public void setSource(File file,
                      int srcType)

getResourceName

public String getResourceName()

getSourceMode

public int getSourceMode()

The source mode this metadata has been loaded under.

setSourceMode

public void setSourceMode(int mode)

The source mode this metadata has been loaded under.

setSourceMode

public void setSourceMode(int mode,
                          boolean on)

The source mode this metadata has been loaded under.

getListingIndex

public int getListingIndex()

The index in which this class was listed in the metadata. Defaults to -1 if this class was not listed in the metadata.

setListingIndex

public void setListingIndex(int index)

The index in which this field was listed in the metadata. Defaults to -1 if this class was not listed in the metadata.

getComments

public String[] getComments()

setComments

public void setComments(String[] comments)

copy

public void copy(ClassMetaData meta)

Copy the metadata from the given instance to this one. Do not copy mapping information.

addExtensionKeys

protected void addExtensionKeys(Collection exts)