org.datanucleus.cache

Class CachedPC<T>

java.lang.Object

org.datanucleus.cache.CachedPC<T>

All Implemented Interfaces:

Serializable

public class CachedPC<T>
extends Object
implements Serializable

An object that is stored in the Level2 Cache keyed by the identity of the persistable object. Comprises a map of the field values keyed by the absolute field number in the class, the loaded fields array, and the version of the object that is represented with these values. Where the field is a relation field (PC, Map, Collection, array) we store the id of any referenced persistable object. This is used when regenerating the object, and recreating its relations. Note that the "id" is the OID or SingleFieldIdentity where applicable otherwise is CachedId

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	CachedPC.CachedId

Constructor Summary

Constructors

Constructor and Description
CachedPC(Class<T> cls, boolean[] loadedFields, Object vers) Constructor.

Method Summary

Modifier and Type	Method and Description
CachedPC<T>	getCopy()
Object	getFieldValue(Integer fieldNumber)
int[]	getLoadedFieldNumbers()
boolean[]	getLoadedFields() Accessor for the loaded fields of this object.
Class<T>	getObjectClass()
Object	getVersion()
void	setFieldValue(Integer fieldNumber, Object value)
void	setLoadedField(int fieldNumber, boolean loaded)
void	setVersion(Object ver)
String	toString() Method to return a sting form of the cached object.
String	toString(boolean debug) Method to return a sting form of the cached object.

Methods inherited from class java.lang.Object

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

Constructor Detail

CachedPC

public CachedPC(Class<T> cls,
                boolean[] loadedFields,
                Object vers)

Constructor.

Parameters:

cls - The class of the object

loadedFields - The loaded fields

vers - The version (optional)

Method Detail

getObjectClass

public Class<T> getObjectClass()

setFieldValue

public void setFieldValue(Integer fieldNumber,
                          Object value)

getFieldValue

public Object getFieldValue(Integer fieldNumber)

setVersion

public void setVersion(Object ver)

getVersion

public Object getVersion()

getLoadedFields

public boolean[] getLoadedFields()

Accessor for the loaded fields of this object. Use setLoadedField() if you want to update a flag.

Returns:

The loaded fields flags

getLoadedFieldNumbers

public int[] getLoadedFieldNumbers()

setLoadedField

public void setLoadedField(int fieldNumber,
                           boolean loaded)

getCopy

public CachedPC<T> getCopy()

toString

public String toString()

Method to return a sting form of the cached object. Returns something like "CachedPC : version=1 loadedFlags=[YY]"

Overrides:

toString in class Object

Returns:

The string form

toString

public String toString(boolean debug)

Method to return a sting form of the cached object. Returns something like "CachedPC : version=1 loadedFlags=[YY]".

Parameters:

debug - Whether to include the field values in the return

Returns:

The string form