com.db4o.typehandlers.internal

Class UnmodifiableListTypeHandler

java.lang.Object

com.db4o.typehandlers.internal.UnmodifiableListTypeHandler

All Implemented Interfaces:

CascadingTypeHandler, InstantiatingTypeHandler, QueryableTypeHandler, ReferenceTypeHandler, TypeHandler4

public class UnmodifiableListTypeHandler
extends java.lang.Object
implements InstantiatingTypeHandler, QueryableTypeHandler, CascadingTypeHandler

Constructor Summary

Constructors

Constructor and Description
UnmodifiableListTypeHandler()

Method Summary

Methods

Modifier and Type	Method and 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()
java.lang.Object	instantiate(ReadContext context)
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.
void	writeInstantiation(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

UnmodifiableListTypeHandler

public UnmodifiableListTypeHandler()

Method Detail

descendsIntoMembers

public boolean descendsIntoMembers()

Specified by:

descendsIntoMembers in interface QueryableTypeHandler

writeInstantiation

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

Description copied from interface: InstantiatingTypeHandler

gets called when an object is to be written to the database. The method must only write data necessary to re instantiate the object, usually the immutable bits of information held by the object. For value types that means their complete state. Mutable state (only allowed in reference types) must be handled during ReferenceTypeHandler#activate(WriteContext)

Specified by:

writeInstantiation in interface InstantiatingTypeHandler

obj - the object

instantiate

public java.lang.Object instantiate(ReadContext context)

Specified by:

instantiate in interface InstantiatingTypeHandler

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

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

defragment

public void defragment(DefragmentContext context)

Description copied from interface: TypeHandler4

gets called when an object gets defragmented.

Specified by:

defragment in interface TypeHandler4

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

cascadeActivation

public 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