org.apache.openjpa.kernel
Class AbstractPCData

java.lang.Object
  org.apache.openjpa.kernel.AbstractPCData

All Implemented Interfaces:

Serializable, PCData

Direct Known Subclasses:

PCDataImpl

public abstract class AbstractPCData
extends Object
implements PCData

Abstract base class which implements core PCData behavior.

Author:

Patrick Linskey, Abe White

See Also:

Serialized Form

Field Summary

static Object

NULL

Constructor Summary

AbstractPCData()

Method Summary

abstract BitSet	getLoaded() Return the loaded field mask.
boolean	isLoaded(int field) Whether the given field index has stored data.
abstract AbstractPCData	newEmbeddedPCData(OpenJPAStateManager sm) Create a new pcdata for holding the state of an embedded instance.
protected Object	toData(FieldMetaData fmd, Object val, StoreContext ctx) Transform the given field value to a data value for caching.
protected Object	toEmbeddedData(Object val, StoreContext ctx) Return the value to cache for the given embedded PC.
protected Object	toEmbeddedField(OpenJPAStateManager sm, ValueMetaData vmd, Object data, FetchConfiguration fetch, Object context) Transform the given data into an embedded PC field value.
protected Object	toField(OpenJPAStateManager sm, FieldMetaData fmd, Object data, FetchConfiguration fetch, Object context) Transform the given data value into its field value.
protected Object	toNestedData(ValueMetaData vmd, Object val, StoreContext ctx) Transform the given nested value to a cachable value.
protected Object	toNestedField(OpenJPAStateManager sm, ValueMetaData vmd, Object data, FetchConfiguration fetch, Object context) Transform the given data value to its field value.
protected Object	toRelationData(Object val, StoreContext ctx) Return the value to cache for the given object.
protected Object	toRelationField(OpenJPAStateManager sm, ValueMetaData vmd, Object data, FetchConfiguration fetch, Object context) Transform the given data into a relation field value.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.openjpa.kernel.PCData

getData, getId, getImplData, getType, getVersion, load, load, setImplData, setVersion, store, store

Field Detail

NULL

public static final Object NULL

Constructor Detail

AbstractPCData

public AbstractPCData()

Method Detail

getLoaded

public abstract BitSet getLoaded()

Return the loaded field mask.

newEmbeddedPCData

public abstract AbstractPCData newEmbeddedPCData(OpenJPAStateManager sm)

Create a new pcdata for holding the state of an embedded instance.

isLoaded

public boolean isLoaded(int field)

Description copied from interface: PCData

Whether the given field index has stored data.

Specified by:

isLoaded in interface PCData

toField

protected Object toField(OpenJPAStateManager sm,
                         FieldMetaData fmd,
                         Object data,
                         FetchConfiguration fetch,
                         Object context)

Transform the given data value into its field value.

toNestedField

protected Object toNestedField(OpenJPAStateManager sm,
                               ValueMetaData vmd,
                               Object data,
                               FetchConfiguration fetch,
                               Object context)

Transform the given data value to its field value. The data value may be a key, value, or element of a map or collection.

toRelationField

protected Object toRelationField(OpenJPAStateManager sm,
                                 ValueMetaData vmd,
                                 Object data,
                                 FetchConfiguration fetch,
                                 Object context)

Transform the given data into a relation field value. Default implementation assumes the data is an oid.

toEmbeddedField

protected Object toEmbeddedField(OpenJPAStateManager sm,
                                 ValueMetaData vmd,
                                 Object data,
                                 FetchConfiguration fetch,
                                 Object context)

Transform the given data into an embedded PC field value. Default implementation assumes the data is an AbstractPCData.

toData

protected Object toData(FieldMetaData fmd,
                        Object val,
                        StoreContext ctx)

Transform the given field value to a data value for caching. Return NULL if unable to cache.

toNestedData

protected Object toNestedData(ValueMetaData vmd,
                              Object val,
                              StoreContext ctx)

Transform the given nested value to a cachable value. Return NULL if the value cannot be cached.

toRelationData

protected Object toRelationData(Object val,
                                StoreContext ctx)

Return the value to cache for the given object. Caches its oid by default.

toEmbeddedData

protected Object toEmbeddedData(Object val,
                                StoreContext ctx)

Return the value to cache for the given embedded PC. Caches a PCData from newEmbeddedPCData(org.apache.openjpa.kernel.OpenJPAStateManager) by default.