com.db4o.internal.handlers

Class StringBasedValueTypeHandlerBase<T>

java.lang.Object

com.db4o.internal.handlers.StringBasedValueTypeHandlerBase<T>

All Implemented Interfaces:

BuiltinTypeHandler, Comparable4, VariableLengthTypeHandler, QueryableTypeHandler, TypeHandler4, ValueTypeHandler

Direct Known Subclasses:

StringBufferHandler

public abstract class StringBasedValueTypeHandlerBase<T>
extends java.lang.Object
implements ValueTypeHandler, BuiltinTypeHandler, VariableLengthTypeHandler, QueryableTypeHandler, Comparable4

Field Summary

Fields

Modifier and Type	Field and Description
java.lang.Class<T>	_clazz

Constructor Summary

Constructors

Constructor and Description
StringBasedValueTypeHandlerBase(java.lang.Class<T> clazz)

Method Summary

Methods

Modifier and Type	Method and Description
ReflectClass	classReflector()
protected abstract java.lang.String	convertObject(T obj)
protected abstract T	convertString(java.lang.String str)
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) creates a prepared comparison to compare multiple objects against one single object.
java.lang.Object	read(ReadContext context) gets called when an value type is to be read from the database.
void	registerReflector(Reflector reflector)
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

Field Detail

_clazz

public final java.lang.Class<T> _clazz

Constructor Detail

StringBasedValueTypeHandlerBase

public StringBasedValueTypeHandlerBase(java.lang.Class<T> clazz)

Method Detail

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

read

public java.lang.Object read(ReadContext context)

Description copied from interface: ValueTypeHandler

gets called when an value type is to be read from the database.

Specified by:

read in interface ValueTypeHandler

Returns:

the read value type

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

prepareComparison

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

Description copied from interface: Comparable4

creates a prepared comparison to compare multiple objects against one single object.

Specified by:

prepareComparison in interface Comparable4

Parameters:

context - the context of the comparison

obj - the object that is to be compared against multiple other objects

Returns:

the prepared comparison

classReflector

public ReflectClass classReflector()

Specified by:

classReflector in interface BuiltinTypeHandler

registerReflector

public void registerReflector(Reflector reflector)

Specified by:

registerReflector in interface BuiltinTypeHandler

descendsIntoMembers

public boolean descendsIntoMembers()

Specified by:

descendsIntoMembers in interface QueryableTypeHandler

convertObject

protected abstract java.lang.String convertObject(T obj)

convertString

protected abstract T convertString(java.lang.String str)