Package org.apache.cayenne
Class HybridPersistentObject
java.lang.Object
org.apache.cayenne.PersistentObject
org.apache.cayenne.HybridPersistentObject
- All Implemented Interfaces:
Serializable,Persistent,Validating
This data object like
GenericPersistentObject uses Map to store generic attributes,
only difference is that this Map will be created lazily at first write, thus reducing memory penalty if possible.
This class can be used as superclass for objects that have attributes created at runtime.
If generic runtime attributes will always be used it may be a good idea to use GenericPersistentObject instead.
If you don't create attributes at runtime it is better to use PersistentObject class.
Map creation is not thread safe, as PersistentObject in general not thread safe by its own.
- Since:
- 4.1, 5.0, renamed from HybridDataObject
- See Also:
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Field Summary
FieldsFields inherited from class org.apache.cayenne.PersistentObject
objectContext, objectId, persistenceState, snapshotVersionFields inherited from interface org.apache.cayenne.Persistent
DEFAULT_VERSION -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionprotected voidappendProperties(StringBuffer buffer) readPropertyDirectly(String propName) Returns mapped property value as currently stored in the Persistent object.protected voidvoidwritePropertyDirectly(String propName, Object val) Modifies a value of a named property without altering the object state in any way, and without triggering any database operations.protected voidMethods inherited from class org.apache.cayenne.PersistentObject
addToManyTarget, beforePropertyRead, beforePropertyWrite, getMapKey, getObjectContext, getObjectId, getPersistenceState, getSnapshotVersion, readNestedProperty, readNestedProperty, readProperty, readSerialized, removeToManyTarget, setObjectContext, setObjectId, setPersistenceState, setReverseRelationship, setSnapshotVersion, setToManyTarget, setToOneTarget, toString, toStringBuffer, unsetReverseRelationship, validateForDelete, validateForInsert, validateForSave, validateForUpdate, willConnect, writeProperty, writeSerialized
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Field Details
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values
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Constructor Details
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HybridPersistentObject
public HybridPersistentObject()
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Method Details
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readPropertyDirectly
Description copied from interface:PersistentReturns mapped property value as currently stored in the Persistent object. Returned value maybe a fault or a real value. This method will not attempt to resolve faults, or to read unmapped properties.- Specified by:
readPropertyDirectlyin interfacePersistent- Overrides:
readPropertyDirectlyin classPersistentObject
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writePropertyDirectly
Description copied from interface:PersistentModifies a value of a named property without altering the object state in any way, and without triggering any database operations. This method is intended mostly for internal use by Cayenne framework, and shouldn't be called from the application code.- Specified by:
writePropertyDirectlyin interfacePersistent- Overrides:
writePropertyDirectlyin classPersistentObject
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appendProperties
- Overrides:
appendPropertiesin classPersistentObject
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readState
- Overrides:
readStatein classPersistentObject- Throws:
IOExceptionClassNotFoundException
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writeState
- Overrides:
writeStatein classPersistentObject- Throws:
IOException
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