Package org.apache.cayenne

Class CayenneDataObject

java.lang.Object

org.apache.cayenne.PersistentObject

org.apache.cayenne.BaseDataObject

org.apache.cayenne.CayenneDataObject

All Implemented Interfaces:

Serializable, DataObject, Persistent, Validating

public class CayenneDataObject
extends BaseDataObject

Implementation of DataObject that uses Map to store object fields.

This implementation was pre 4.1 default.

Since 4.1 it is recommended to use BaseDataObject as superclass (and it is actually default now), as it has better performance and lower memory consumption (much lower for small objects).

You may need to use this class only if you have some generic attributes created at runtime (also consider HybridDataObject in this case) or if any compatibility issues arise.

See Also:

• BaseDataObject
• HybridDataObject
• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected Map<String,Object>	values

Fields inherited from class org.apache.cayenne.BaseDataObject

snapshotVersion

Fields inherited from class org.apache.cayenne.PersistentObject

objectContext, objectId, persistenceState

Fields inherited from interface org.apache.cayenne.DataObject

DEFAULT_VERSION

Constructor Summary

Constructors

Constructor	Description
CayenneDataObject()

Method Summary

Modifier and Type	Method	Description
protected void	appendProperties(StringBuffer buffer)
static String	makePath(String... pathParts)	Deprecated. since 4.1, use Cayenne.makePath(String...) instead
Object	readPropertyDirectly(String propName)	Returns mapped property value as curently stored in the DataObject.
protected void	readState(ObjectInputStream in)
void	setPersistenceState(int persistenceState)
void	writePropertyDirectly(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 void	writeState(ObjectOutputStream out)

Methods inherited from class org.apache.cayenne.BaseDataObject

addToManyTarget, beforePropertyRead, beforePropertyWrite, getSnapshotVersion, readNestedProperty, readProperty, readSerialized, removeToManyTarget, setObjectContext, setReverseRelationship, setSnapshotVersion, setToManyTarget, setToOneTarget, toString, toStringBuffer, unsetReverseRelationship, validateForDelete, validateForInsert, validateForSave, validateForUpdate, willConnect, writeProperty, writeSerialized

Methods inherited from class org.apache.cayenne.PersistentObject

getMapKey, getObjectContext, getObjectId, getPersistenceState, setObjectId

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.cayenne.Persistent

getObjectContext, getObjectId, getPersistenceState, setObjectId

Field Details

values

protected Map<String,Object> values

Constructor Details

CayenneDataObject

public CayenneDataObject()

Method Details

setPersistenceState

public void setPersistenceState(int persistenceState)

Specified by:

setPersistenceState in interface Persistent

Overrides:

setPersistenceState in class BaseDataObject

readPropertyDirectly

public Object readPropertyDirectly(String propName)

Description copied from interface: DataObject

Returns mapped property value as curently stored in the DataObject. Returned value maybe a fault or a real value. This method will not attempt to resolve faults, or to read unmapped properties.

Specified by:

readPropertyDirectly in interface DataObject

Overrides:

readPropertyDirectly in class BaseDataObject

writePropertyDirectly

public void writePropertyDirectly(String propName,
 Object val)

Description copied from interface: DataObject

Modifies 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:

writePropertyDirectly in interface DataObject

Overrides:

writePropertyDirectly in class BaseDataObject

appendProperties

protected void appendProperties(StringBuffer buffer)

Overrides:

appendProperties in class BaseDataObject

readState

protected void readState(ObjectInputStream in)
                  throws IOException,
ClassNotFoundException

Overrides:

readState in class BaseDataObject

Throws:

IOException

ClassNotFoundException

writeState

protected void writeState(ObjectOutputStream out)
                   throws IOException

Overrides:

writeState in class BaseDataObject

Throws:

IOException

makePath

@Deprecated
public static String makePath(String... pathParts)

Deprecated.

since 4.1, use Cayenne.makePath(String...) instead

Convenience method to invoke Cayenne.makePath(String...) from within a DataObject subclass to create a dotted path using the generated string constants for attributes and relationships.

Since:

3.1

See Also:

• Cayenne.makePath(String...)