Top Description Inners Fields Constructors Methods
org.springframework.core.convert.support

pack-priv final Class ObjectToOptionalConverter

extends Object
implements ConditionalGenericConverter
Class Inheritance
All Implemented Interfaces
org.springframework.core.convert.converter.ConditionalGenericConverter, org.springframework.core.convert.converter.ConditionalConverter, org.springframework.core.convert.converter.GenericConverter
Imports
java.lang.reflect.Array, java.util.Collection, .LinkedHashSet, .Optional, .Set, org.springframework.core.convert.ConversionService, .TypeDescriptor, org.springframework.core.convert.converter.ConditionalGenericConverter, org.springframework.lang.Nullable
Convert an Object to java.util.Optional<T> if necessary using the ConversionService to convert the source Object to the generic type of Optional when known.
Authors
Rossen Stoyanchev, Juergen Hoeller
Since
4.1

Nested and Inner Type Summary

Modifier and TypeClass and Description
private static class
ObjectToOptionalConverter.GenericTypeDescriptor

Field Summary

Modifier and TypeField and Description
private final ConversionService
conversionService

Constructor Summary

AccessConstructor and Description
public
ObjectToOptionalConverter(ConversionService conversionService)

Method Summary

Modifier and TypeMethod and Description
public Object
convert(Object
the source object to convert (may be null)
source, TypeDescriptor
the type descriptor of the field we are converting from
sourceType, TypeDescriptor
the type descriptor of the field we are converting to
targetType)

Implements org.springframework.core.convert.converter.GenericConverter.convert.

Convert the source object to the targetType described by the TypeDescriptor.

public Set<GenericConverter.ConvertiblePair>
getConvertibleTypes()

Implements org.springframework.core.convert.converter.GenericConverter.getConvertibleTypes.

Return the source and target types that this converter can convert between.

public boolean
matches(TypeDescriptor
the type descriptor of the field we are converting from
sourceType, TypeDescriptor
the type descriptor of the field we are converting to
targetType)

Implements org.springframework.core.convert.converter.ConditionalConverter.matches.

Should the conversion from sourceType to targetType currently under consideration be selected?

Inherited from java.lang.Object:
cloneequalsfinalizegetClasshashCodenotifynotifyAlltoStringwaitwaitwait

Field Detail

conversionServiceback to summary
private final ConversionService conversionService

Constructor Detail

ObjectToOptionalConverterback to summary
public ObjectToOptionalConverter(ConversionService conversionService)

Method Detail

convertback to summary
public Object convert(Object source, TypeDescriptor sourceType, TypeDescriptor targetType)

Implements org.springframework.core.convert.converter.GenericConverter.convert.

Doc from org.springframework.core.convert.converter.GenericConverter.convert.

Convert the source object to the targetType described by the TypeDescriptor.

Parameters
source:Object

the source object to convert (may be null)

sourceType:TypeDescriptor

the type descriptor of the field we are converting from

targetType:TypeDescriptor

the type descriptor of the field we are converting to

Returns:Object

the converted object

Annotations
@Override
getConvertibleTypesback to summary
public Set<GenericConverter.ConvertiblePair> getConvertibleTypes()

Implements org.springframework.core.convert.converter.GenericConverter.getConvertibleTypes.

Doc from org.springframework.core.convert.converter.GenericConverter.getConvertibleTypes.

Return the source and target types that this converter can convert between.

Each entry is a convertible source-to-target type pair.

For conditional converters this method may return null to indicate all source-to-target pairs should be considered.

Annotations
@Override
matchesback to summary
public boolean matches(TypeDescriptor sourceType, TypeDescriptor targetType)

Implements org.springframework.core.convert.converter.ConditionalConverter.matches.

Doc from org.springframework.core.convert.converter.ConditionalConverter.matches.

Should the conversion from sourceType to targetType currently under consideration be selected?

Parameters
sourceType:TypeDescriptor

the type descriptor of the field we are converting from

targetType:TypeDescriptor

the type descriptor of the field we are converting to

Returns:boolean

true if conversion should be performed, false otherwise

Annotations
@Override
org.springframework.core.convert.support back to summary

private Class ObjectToOptionalConverter.GenericTypeDescriptor

extends TypeDescriptor
Class Inheritance
Annotations
@SuppressWarnings:serial

Constructor Summary

AccessConstructor and Description
public
GenericTypeDescriptor(TypeDescriptor typeDescriptor)

Method Summary

Inherited from org.springframework.core.convert.TypeDescriptor:
arraycollectionelementTypeDescriptorequalsforObjectgetAnnotationgetAnnotationsgetElementTypeDescriptorgetMapKeyTypeDescriptorgetMapKeyTypeDescriptorgetMapValueTypeDescriptorgetMapValueTypeDescriptorgetNamegetObjectTypegetResolvableTypegetSourcegetTypehasAnnotationhashCodeisArrayisAssignableToisCollectionisMapisPrimitivemapnarrownestednestednestednestedtoStringupcastvalueOf

Constructor Detail

GenericTypeDescriptorback to summary
public GenericTypeDescriptor(TypeDescriptor typeDescriptor)