com.db4o.ext

Interface StoredClass

All Known Implementing Classes:

ClassMetadata, ObjectTypeMetadata, PrimitiveTypeMetadata, StoredClassImpl

public interface StoredClass

the internal representation of a stored class.

Method Summary

Methods

Modifier and Type	Method and Description
long[]	getIDs() returns an array of IDs of all stored object instances of this stored class.
java.lang.String	getName() returns the name of this stored class.
StoredClass	getParentStoredClass() returns the StoredClass for the parent of the class, this StoredClass represents.
StoredField[]	getStoredFields() returns all stored fields of this stored class.
boolean	hasClassIndex() returns true if this StoredClass has a class index.
int	instanceCount() Returns the number of instances of this class that have been persisted to the database, as seen by the transaction (container) that produces this StoredClass instance.
void	rename(java.lang.String name) renames this stored class.
StoredField	storedField(java.lang.String name, java.lang.Object type) returns an existing stored field of this stored class.

Method Detail

getName

java.lang.String getName()

returns the name of this stored class.

getIDs

long[] getIDs()

returns an array of IDs of all stored object instances of this stored class.

getParentStoredClass

StoredClass getParentStoredClass()

returns the StoredClass for the parent of the class, this StoredClass represents.

getStoredFields

StoredField[] getStoredFields()

returns all stored fields of this stored class.

hasClassIndex

boolean hasClassIndex()

returns true if this StoredClass has a class index.

rename

void rename(java.lang.String name)

renames this stored class.

After renaming one or multiple classes the ObjectContainer has to be closed and reopened to allow internal caches to be refreshed.

.NET: As the name you should provide [Classname, Assemblyname]

Parameters:

name - the new name

storedField

StoredField storedField(java.lang.String name,
                      java.lang.Object type)

returns an existing stored field of this stored class.

Parameters:

name - the name of the field

type - the type of the field. There are four possibilities how to supply the type:
- a Class object. (.NET: a Type object)
- a fully qualified classname.
- any object to be used as a template.

- null, if the first found field should be returned.

Returns:

the StoredField

instanceCount

int instanceCount()

Returns the number of instances of this class that have been persisted to the database, as seen by the transaction (container) that produces this StoredClass instance.

Returns:

The number of instances