Package com.sleepycat.persist.model

Class ClassMetadata

java.lang.Object

com.sleepycat.persist.model.ClassMetadata

All Implemented Interfaces:

Serializable

public class ClassMetadata
extends Object
implements Serializable

The metadata for a persistent class. A persistent class may be specified with the Entity or Persistent annotation.

ClassMetadata objects are thread-safe. Multiple threads may safely call the methods of a shared ClassMetadata object.

This and other metadata classes are classes rather than interfaces to allow adding properties to the model at a future date without causing incompatibilities. Any such property will be given a default value and its use will be optional.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
ClassMetadata(String className, int version, String proxiedClassName, boolean entityClass, PrimaryKeyMetadata primaryKey, Map<String,SecondaryKeyMetadata> secondaryKeys, List<FieldMetadata> compositeKeyFields)	Used by an EntityModel to construct persistent class metadata.
ClassMetadata(String className, int version, String proxiedClassName, boolean entityClass, PrimaryKeyMetadata primaryKey, Map<String,SecondaryKeyMetadata> secondaryKeys, List<FieldMetadata> compositeKeyFields, Collection<FieldMetadata> persistentFields)	Used by an EntityModel to construct persistent class metadata.

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object other)
String	getClassName()	Returns the name of the persistent class.
List<FieldMetadata>	getCompositeKeyFields()	Returns an unmodifiable list of metadata for the fields making up a composite key, or null if this is a not a composite key class.
Collection<FieldMetadata>	getPersistentFields()	Returns an unmodifiable list of metadata for the persistent fields in this class, or null if the default rules for persistent fields should be used.
PrimaryKeyMetadata	getPrimaryKey()	Returns the primary key metadata for a key declared in this class, or null if none is declared.
String	getProxiedClassName()	Returns the class name of the proxied class if this class is a PersistentProxy, or null otherwise.
Map<String,SecondaryKeyMetadata>	getSecondaryKeys()	Returns an unmodifiable map of key name (which may be different from field name) to secondary key metadata for all secondary keys declared in this class, or null if no secondary keys are declared in this class.
int	getVersion()	Returns the version of this persistent class.
int	hashCode()
boolean	isEntityClass()	Returns whether this class is an entity class.

Methods inherited from class java.lang.Object

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

Constructor Details

ClassMetadata

public ClassMetadata(String className,
 int version,
 String proxiedClassName,
 boolean entityClass,
 PrimaryKeyMetadata primaryKey,
 Map<String,SecondaryKeyMetadata> secondaryKeys,
 List<FieldMetadata> compositeKeyFields)

Used by an EntityModel to construct persistent class metadata. The optional getPersistentFields() property will be set to null.

ClassMetadata

public ClassMetadata(String className,
 int version,
 String proxiedClassName,
 boolean entityClass,
 PrimaryKeyMetadata primaryKey,
 Map<String,SecondaryKeyMetadata> secondaryKeys,
 List<FieldMetadata> compositeKeyFields,
 Collection<FieldMetadata> persistentFields)

Used by an EntityModel to construct persistent class metadata.

Method Details

getClassName

public String getClassName()

Returns the name of the persistent class.

getVersion

public int getVersion()

Returns the version of this persistent class. This may be specified using the Entity.version() or Persistent.version() annotation.

getProxiedClassName

public String getProxiedClassName()

Returns the class name of the proxied class if this class is a PersistentProxy, or null otherwise.

isEntityClass

public boolean isEntityClass()

Returns whether this class is an entity class.

getPrimaryKey

public PrimaryKeyMetadata getPrimaryKey()

Returns the primary key metadata for a key declared in this class, or null if none is declared. This may be specified using the PrimaryKey annotation.

getSecondaryKeys

public Map<String,SecondaryKeyMetadata> getSecondaryKeys()

Returns an unmodifiable map of key name (which may be different from field name) to secondary key metadata for all secondary keys declared in this class, or null if no secondary keys are declared in this class. This metadata may be specified using SecondaryKey annotations.

getCompositeKeyFields

public List<FieldMetadata> getCompositeKeyFields()

Returns an unmodifiable list of metadata for the fields making up a composite key, or null if this is a not a composite key class. The order of the fields in the returned list determines their stored order and may be specified using the KeyField annotation. When the composite key class does not implement Comparable, the order of the fields is the relative sort order.

getPersistentFields

public Collection<FieldMetadata> getPersistentFields()

Returns an unmodifiable list of metadata for the persistent fields in this class, or null if the default rules for persistent fields should be used. All fields returned must be declared in this class and must be non-static.

By default (if null is returned) the persistent fields of a class will be all declared instance fields that are non-transient (are not declared with the transient keyword). The default rules may be overridden by an EntityModel. For example, the AnnotationModel overrides the default rules when the NotPersistent or NotTransient annotation is specified.

equals

public boolean equals(Object other)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object