io.doov.core.dsl.mapping

Class TypeConverters

java.lang.Object

io.doov.core.dsl.mapping.TypeConverters

public class TypeConverters
extends java.lang.Object

Factory methods of TypeConverters

Constructor Summary

Constructors

Constructor and Description
TypeConverters()

Method Summary

Modifier and Type	Method and Description
static <I> TypeConverter<I,java.lang.String>	asString(TypeAdapterRegistry typeAdapters) Convert the value in type I to String using TypeAdapter registry
static <I,J,O> BiTypeConverter<I,J,O>	biConverter(java.util.function.BiFunction<I,J,O> converter, I nullIn, J nullIn2, java.lang.String description) 2-to-1 converter with compensation values for null inputs.
static <I,J,O> BiTypeConverter<I,J,O>	biConverter(java.util.function.BiFunction<I,J,O> converter, O nullCase, java.lang.String description) 2-to-1 converter with null calse.
static <I,J,O> BiTypeConverter<I,J,O>	biConverter(java.util.function.BiFunction<java.util.Optional<I>,java.util.Optional<J>,O> converter, java.lang.String description) 2-to-1 converter with optional types
static <I,O> TypeConverter<I,O>	converter(java.util.function.Function<I,O> converter, O nullCase, java.lang.String description) 1-to-1 converter with null case.
static <I,O> TypeConverter<I,O>	converter(java.util.function.Function<I,O> converter, java.lang.String description) 1-to-1 converter
static NaryTypeConverter<java.lang.Integer>	counter(java.lang.String description) Counts the non-null fields
static <O,T extends DslField<O> & FieldInfo> TypeConverter<java.lang.String,O>	fromString(T fieldInfo, TypeAdapterRegistry typeAdapters) Convert String to I using TypeAdapter registry
static <O> NaryTypeConverter<O>	nConverter(java.util.function.BiFunction<FieldModel,java.util.List<DslField<?>>,O> function, java.lang.String description) N-to-1 converter.

Methods inherited from class java.lang.Object

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

Constructor Detail

TypeConverters

public TypeConverters()

Method Detail

converter

public static <I,O> TypeConverter<I,O> converter(java.util.function.Function<I,O> converter,
                                                 java.lang.String description)

1-to-1 converter

Type Parameters:

I - input type

O - output type

Parameters:

converter - converter function

description - text description

Returns:

type converter

asString

public static <I> TypeConverter<I,java.lang.String> asString(TypeAdapterRegistry typeAdapters)

Convert the value in type I to String using TypeAdapter registry

Type Parameters:

I - input type

Parameters:

typeAdapters - type adapter registry

Returns:

type converter that returns String representation of the value, null when the value is null, type converter throws IllegalStateException when no type adapters accepts to convert value.

fromString

public static <O,T extends DslField<O> & FieldInfo> TypeConverter<java.lang.String,O> fromString(T fieldInfo,
                                                                                                 TypeAdapterRegistry typeAdapters)

Convert String to I using TypeAdapter registry

Type Parameters:

O - output type

T - field type to lookup the type adapter

Parameters:

fieldInfo - field of the

typeAdapters - type adapter registry

Returns:

type converter that returns the object value from String representation.

Throws:

java.lang.IllegalStateException - if no type adapter is found for the given field

converter

public static <I,O> TypeConverter<I,O> converter(java.util.function.Function<I,O> converter,
                                                 O nullCase,
                                                 java.lang.String description)

1-to-1 converter with null case. Converter returns the nullCase value when the input is null.

Type Parameters:

I - input type

O - output type

Parameters:

converter - converter function

nullCase - value to return when the input is null

description - text description

Returns:

type converter

biConverter

public static <I,J,O> BiTypeConverter<I,J,O> biConverter(java.util.function.BiFunction<java.util.Optional<I>,java.util.Optional<J>,O> converter,
                                                         java.lang.String description)

2-to-1 converter with optional types

Type Parameters:

I - first input type

J - second input type

O - output type

Parameters:

converter - converter function with optional types as input

description - text description

Returns:

type converter

biConverter

public static <I,J,O> BiTypeConverter<I,J,O> biConverter(java.util.function.BiFunction<I,J,O> converter,
                                                         O nullCase,
                                                         java.lang.String description)

2-to-1 converter with null calse. Converter returns nullCase value when both inputs are null.

Type Parameters:

I - first input type

J - second input type

O - output type

Parameters:

converter - converter function

nullCase - value to return when inputs are null

description - text description

Returns:

type converter

biConverter

public static <I,J,O> BiTypeConverter<I,J,O> biConverter(java.util.function.BiFunction<I,J,O> converter,
                                                         I nullIn,
                                                         J nullIn2,
                                                         java.lang.String description)

2-to-1 converter with compensation values for null inputs. Converter function will receive the corresponding nullIn value when the input is null.

Type Parameters:

I - first input type

J - second input type

O - output type

Parameters:

converter - converter function

nullIn - compensation value for first input

nullIn2 - compensation value for second input

description - text description

Returns:

type converter

nConverter

public static <O> NaryTypeConverter<O> nConverter(java.util.function.BiFunction<FieldModel,java.util.List<DslField<?>>,O> function,
                                                  java.lang.String description)

N-to-1 converter. Converter function takes FieldModel and a list of DslField and returns the output value

Type Parameters:

O - output type

Parameters:

function - converter function

description - text description

Returns:

type converter

counter

public static NaryTypeConverter<java.lang.Integer> counter(java.lang.String description)

Counts the non-null fields

Parameters:

description - text description

Returns:

type converter