Package io.axoniq.dataprotection.serialization

Class ChainedConverter<S,T>

java.lang.Object

io.axoniq.dataprotection.serialization.ChainedConverter<S,T>

Type Parameters:

S - The source type of the converter

T - The target type of the converter

All Implemented Interfaces:

ContentTypeConverter<S,T>

public class ChainedConverter<S,T>
extends Object
implements ContentTypeConverter<S,T>

A converter that delegates to a chain of other ContentTypeConverters to convert from a source to a target for which there is not necessarily a single converter available.

Since:

2.0

Author:

Allard Buijze

Constructor Summary

Constructors

Constructor	Description
ChainedConverter(List<ContentTypeConverter<?,?>> delegates)	Creates a new instance that uses the given delegates to form a chain of converters.

Method Summary

Modifier and Type	Method	Description
static <S,T> ChainedConverter<S,T>	calculateChain(Class<S> sourceType, Class<T> targetType, Collection<ContentTypeConverter<?,?>> candidates)	Returns a converter that can convert an IntermediateRepresentation from the given sourceType to the given targetType using a chain formed with given candidates.
static <S,T> boolean	canConvert(Class<S> sourceContentType, Class<T> targetContentType, List<ContentTypeConverter<?,?>> converters)	Indicates whether this converter is capable of converting the given sourceContentType into targetContentType, using the given converters.
T	convert(S original)	Converts the given object into another.
Class<S>	expectedSourceType()	The expected type of input data.
Class<T>	targetType()	The returned type of IntermediateRepresentation

Methods inherited from class java.lang.Object

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

Constructor Detail

ChainedConverter

public ChainedConverter(List<ContentTypeConverter<?,?>> delegates)

Creates a new instance that uses the given delegates to form a chain of converters. Note that the delegates must for a Continuous chain, meaning that each item must produce an IntermediateRepresentation of a type that can be consumed by the next delegate. To automatically calculate a route between converters, see calculateChain(source, target, candidates)

Parameters:

delegates - the chain of delegates to perform the conversion

Method Detail

calculateChain

public static <S,T> ChainedConverter<S,T> calculateChain(Class<S> sourceType,
                                                                     Class<T> targetType,
                                                                     Collection<ContentTypeConverter<?,?>> candidates)

Returns a converter that can convert an IntermediateRepresentation from the given sourceType to the given targetType using a chain formed with given candidates. The returned converter uses some (or all) of the given candidates as delegates.

Type Parameters:

S - The source type of the converter

T - The target type of the converter

Parameters:

sourceType - The source type of the converter

targetType - The target type of the converter

candidates - The candidates to form a chain with

Returns:

A converter for the given source and target types

Throws:

CannotConvertBetweenTypesException - if no converter can be created using given candidates

canConvert

public static <S,T> boolean canConvert(Class<S> sourceContentType,
                                             Class<T> targetContentType,
                                             List<ContentTypeConverter<?,?>> converters)

Indicates whether this converter is capable of converting the given sourceContentType into targetContentType, using the given converters. When true, it may use any number of the given converters to form a chain.

Type Parameters:

S - The content type of the source object

T - The content type of the target object

Parameters:

sourceContentType - The content type of the source object

targetContentType - The content type of the target object

converters - The converters eligible for use

Returns:

true if this Converter can convert between the given types, using the given converters. Otherwise false.

convert

public T convert(S original)

Description copied from interface: ContentTypeConverter

Converts the given object into another. Typically, these values are contained by a SerializedObject instance.

Specified by:

convert in interface ContentTypeConverter<S,T>

Parameters:

original - the value to convert

Returns:

the converted value

expectedSourceType

public Class<S> expectedSourceType()

Description copied from interface: ContentTypeConverter

The expected type of input data.

Specified by:

expectedSourceType in interface ContentTypeConverter<S,T>

Returns:

the expected data format in IntermediateRepresentation

targetType

public Class<T> targetType()

Description copied from interface: ContentTypeConverter

The returned type of IntermediateRepresentation

Specified by:

targetType in interface ContentTypeConverter<S,T>

Returns:

the output data format in IntermediateRepresentation