Package com.db4o.typehandlers

Class CollectionTypeHandler

java.lang.Object

com.db4o.typehandlers.CollectionTypeHandler

All Implemented Interfaces:

VariableLengthTypeHandler, CascadingTypeHandler, QueryableTypeHandler, ReferenceTypeHandler, TypeHandler4

public class CollectionTypeHandler
extends java.lang.Object
implements ReferenceTypeHandler, CascadingTypeHandler, VariableLengthTypeHandler, QueryableTypeHandler

TypeHandler for Collections. On the .NET side, usage is restricted to instances of IList.

Constructor Summary

Constructors

Constructor	Description
CollectionTypeHandler()

Method Summary

Modifier and Type	Method	Description
void	activate(ReferenceActivationContext context)	gets called when an object is to be activated.
void	cascadeActivation(ActivationContext context)	will be called during activation if the handled object is already active
void	collectIDs(QueryingReadContext context)	will be called during querying to ask for IDs of member objects of the handled object.
void	defragment(DefragmentContext context)	gets called when an object gets defragmented.
void	delete(DeleteContext context)	gets called when an object gets deleted.
boolean	descendsIntoMembers()
PreparedComparison	prepareComparison(Context context, java.lang.Object obj)
TypeHandler4	readCandidateHandler(QueryingReadContext context)	will be called during querying to ask for the handler to be used to collect children of the handled object
void	write(WriteContext context, java.lang.Object obj)	gets called when an object is to be written to the database.

Methods inherited from class java.lang.Object

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

Constructor Detail

CollectionTypeHandler

public CollectionTypeHandler()

Method Detail

prepareComparison

public PreparedComparison prepareComparison(Context context,
                                            java.lang.Object obj)

write

public void write(WriteContext context,
                  java.lang.Object obj)

Description copied from interface: TypeHandler4

gets called when an object is to be written to the database.

Specified by:

write in interface TypeHandler4

obj - the object

activate

public void activate(ReferenceActivationContext context)

Description copied from interface: ReferenceTypeHandler

gets called when an object is to be activated.

Specified by:

activate in interface ReferenceTypeHandler

delete

public void delete(DeleteContext context)
            throws Db4oIOException

Description copied from interface: TypeHandler4

gets called when an object gets deleted.

Specified by:

delete in interface TypeHandler4

Throws:

Db4oIOException

defragment

public void defragment(DefragmentContext context)

Description copied from interface: TypeHandler4

gets called when an object gets defragmented.

Specified by:

defragment in interface TypeHandler4

cascadeActivation

public final void cascadeActivation(ActivationContext context)

Description copied from interface: CascadingTypeHandler

will be called during activation if the handled object is already active

Specified by:

cascadeActivation in interface CascadingTypeHandler

readCandidateHandler

public TypeHandler4 readCandidateHandler(QueryingReadContext context)

Description copied from interface: CascadingTypeHandler

will be called during querying to ask for the handler to be used to collect children of the handled object

Specified by:

readCandidateHandler in interface CascadingTypeHandler

Returns:

collectIDs

public void collectIDs(QueryingReadContext context)

Description copied from interface: CascadingTypeHandler

will be called during querying to ask for IDs of member objects of the handled object.

Specified by:

collectIDs in interface CascadingTypeHandler

descendsIntoMembers

public boolean descendsIntoMembers()

Specified by:

descendsIntoMembers in interface QueryableTypeHandler