PersistentProperty (Spring Data Core 2.3.0.RELEASE API)

All Known Implementing Classes:

AbstractPersistentProperty, AnnotationBasedPersistentProperty
```
public interface PersistentProperty<P extends PersistentProperty<P>>
```
Author:

Graeme Rocher, Jon Brisbin, Oliver Gierke, Mark Paluch, Jens Schauder

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method and Description
`<A extends Annotation> A`	`findAnnotation(Class<A> annotationType)` Looks up the annotation of the given type on the `PersistentProperty`.
`<A extends Annotation> A`	`findPropertyOrOwnerAnnotation(Class<A> annotationType)` Looks up the annotation of the given type on the property and the owning type if no annotation can be found on it.
`default <T> PersistentPropertyAccessor<T>`	`getAccessorForOwner(T owner)` Returns a `PersistentPropertyAccessor` for the current property's owning value.
`Class<?>`	`getActualType()` Returns the actual type of the property.
`Association<P>`	`getAssociation()`
`Class<?>`	`getAssociationTargetType()` Return the type the property refers to in case it's an association.
`Class<?>`	`getComponentType()` Returns the component type of the type if it is a `Collection`.
`Field`	`getField()`
`Method`	`getGetter()` Returns the getter method to access the property value if available.
`Class<?>`	`getMapValueType()` Returns the type of the values if the property is a `Map`.
`String`	`getName()` The name of the property
`PersistentEntity<?,P>`	`getOwner()` Returns the `PersistentEntity` owning the current `PersistentProperty`.
`Iterable<? extends TypeInformation<?>>`	`getPersistentEntityTypes()` Returns the `TypeInformation` if the property references a `PersistentEntity`.
`Class<?>`	`getRawType()` Returns the raw type as it's pulled from from the reflected property.
`default <A extends Annotation> A`	`getRequiredAnnotation(Class<A> annotationType)` Looks up the annotation of the given type on the `PersistentProperty`.
`default Association<P>`	`getRequiredAssociation()` Get the `Association` of this property.
`default Field`	`getRequiredField()`
`default Method`	`getRequiredGetter()`
`default Method`	`getRequiredSetter()`
`default Method`	`getRequiredWither()`
`Method`	`getSetter()` Returns the setter method to set a property value.
`String`	`getSpelExpression()`
`Class<?>`	`getType()` The type of the property
`TypeInformation<?>`	`getTypeInformation()` Returns the `TypeInformation` of the property.
`Method`	`getWither()` Returns the with `Method` to set a property value on a new object instance.
`default boolean`	`hasActualTypeAnnotation(Class<? extends Annotation> annotationType)` Returns whether the actual type of the property carries the given annotation.
`boolean`	`isAnnotationPresent(Class<? extends Annotation> annotationType)` Returns whether the `PersistentProperty` has an annotation of the given type.
`boolean`	`isArray()` Returns whether the property is an array.
`boolean`	`isAssociation()` Returns whether the property is an `Association`.
`boolean`	`isCollectionLike()` Returns whether the property is a `Collection`, `Iterable` or an array.
`boolean`	`isEntity()` Returns whether the type of the `PersistentProperty` is actually to be regarded as `PersistentEntity` in turn.
`boolean`	`isIdProperty()` Returns whether the property is a potential identifier property of the owning `PersistentEntity`.
`boolean`	`isImmutable()` Returns whether the current property is immutable, i.e. if there is no setter or the backing `Field` is `final`.
`boolean`	`isMap()` Returns whether the property is a `Map`.
`boolean`	`isTransient()` Returns whether the property is transient.
`boolean`	`isVersionProperty()` Returns whether the current property is a potential version property of the owning `PersistentEntity`.
`boolean`	`isWritable()` Returns whether the current property is writable, i.e. if the value held for it shall be written to the data store.
`boolean`	`usePropertyAccess()` Returns whether property access shall be used for reading the property value.

- Method Detail
  - getOwner
```
PersistentEntity<?,P> getOwner()
```
    Returns the PersistentEntity owning the current PersistentProperty.
    
    Returns:
    
    never null.
  - getName
```
String getName()
```
    The name of the property
    
    Returns:
    
    The property name
  - getType
```
Class<?> getType()
```
    The type of the property
    
    Returns:
    
    The property type
  - getTypeInformation
```
TypeInformation<?> getTypeInformation()
```
    Returns the TypeInformation of the property.
    
    Returns:
  - getPersistentEntityTypes
```
Iterable<? extends TypeInformation<?>> getPersistentEntityTypes()
```
    Returns the TypeInformation if the property references a PersistentEntity. Will return null in case it refers to a simple type. Will return Collection's component type or the Map's value type transparently.
    
    Returns:
  - getGetter
```
@Nullable
Method getGetter()
```
    Returns the getter method to access the property value if available. Might return null in case there is no getter method with a return type assignable to the actual property's type.
    
    Returns:
    
    the getter method to access the property value if available, otherwise null.
  - getRequiredGetter
```
default Method getRequiredGetter()
```
  - getSetter
```
@Nullable
Method getSetter()
```
    Returns the setter method to set a property value. Might return null in case there is no setter available.
    
    Returns:
    
    the setter method to set a property value if available, otherwise null.
  - getRequiredSetter
```
default Method getRequiredSetter()
```
  - getWither
```
@Nullable
Method getWither()
```
    Returns the with Method to set a property value on a new object instance. Might return null in case there is no with available.
    With methods are property-bound instance methods that accept a single argument of the property type creating a new object instance.
```
 class Person {
        final String id;
        final String name;

        // …

        Person withName(String name) {
                return new Person(this.id, name);
        }
 }
 
```
    Returns:
    
    the with Method to set a property value on a new object instance if available, otherwise null.
    
    Since:
    
    2.1
  - getRequiredWither
```
default Method getRequiredWither()
```
  - getField
```
@Nullable
Field getField()
```
  - getRequiredField
```
default Field getRequiredField()
```
  - getSpelExpression
```
@Nullable
String getSpelExpression()
```
    Returns:
    
    null if no expression defined.
  - getAssociation
```
@Nullable
Association<P> getAssociation()
```
    Returns:
    
    null if property is not part of an Association.
  - getRequiredAssociation
```
default Association<P> getRequiredAssociation()
```
    Get the Association of this property.
    
    Returns:
    
    never null.
    
    Throws:
    
    IllegalStateException - if not involved in an Association.
  - isEntity
```
boolean isEntity()
```
    Returns whether the type of the PersistentProperty is actually to be regarded as PersistentEntity in turn.
    
    Returns:
    
    true a PersistentEntity.
  - isIdProperty
```
boolean isIdProperty()
```
    Returns whether the property is a potential identifier property of the owning PersistentEntity. This method is mainly used by PersistentEntity implementation to discover id property candidates on PersistentEntity creation you should rather call PersistentEntity.isIdProperty(PersistentProperty) to determine whether the current property is the id property of that PersistentEntity under consideration.
    
    Returns:
    
    true if the id property.
  - isVersionProperty
```
boolean isVersionProperty()
```
    Returns whether the current property is a potential version property of the owning PersistentEntity. This method is mainly used by PersistentEntity implementation to discover version property candidates on PersistentEntity creation you should rather call PersistentEntity.isVersionProperty(PersistentProperty) to determine whether the current property is the version property of that PersistentEntity under consideration.
    
    Returns:
  - isCollectionLike
```
boolean isCollectionLike()
```
    Returns whether the property is a Collection, Iterable or an array.
    
    Returns:
  - isMap
```
boolean isMap()
```
    Returns whether the property is a Map.
    
    Returns:
  - isArray
```
boolean isArray()
```
    Returns whether the property is an array.
    
    Returns:
  - isTransient
```
boolean isTransient()
```
    Returns whether the property is transient.
    
    Returns:
  - isWritable
```
boolean isWritable()
```
    Returns whether the current property is writable, i.e. if the value held for it shall be written to the data store.
    
    Returns:
    
    Since:
    
    1.9
  - isImmutable
```
boolean isImmutable()
```
    Returns whether the current property is immutable, i.e. if there is no setter or the backing Field is final.
    
    Returns:
    
    Since:
    
    2.1
    
    See Also:
    
    Modifier.isFinal(int)
  - isAssociation
```
boolean isAssociation()
```
    Returns whether the property is an Association.
    
    Returns:
  - getComponentType
```
@Nullable
Class<?> getComponentType()
```
    Returns the component type of the type if it is a Collection. Will return the type of the key if the property is a Map.
    
    Returns:
    
    the component type, the map's key type or null if neither Collection nor Map.
  - getRawType
```
Class<?> getRawType()
```
    Returns the raw type as it's pulled from from the reflected property.
    
    Returns:
    
    the raw type of the property.
  - getMapValueType
```
@Nullable
Class<?> getMapValueType()
```
    Returns the type of the values if the property is a Map.
    
    Returns:
    
    the map's value type or null if no Map
  - getActualType
```
Class<?> getActualType()
```
    Returns the actual type of the property. This will be the original property type if no generics were used, the component type for collection-like types and arrays as well as the value type for map properties.
    
    Returns:
  - findAnnotation
```
@Nullable
<A extends Annotation> A findAnnotation(Class<A> annotationType)
```
    Looks up the annotation of the given type on the PersistentProperty. Will inspect accessors and the potentially backing field and traverse accessor methods to potentially available super types.
    
    Parameters:
    
    annotationType - the annotation to look up, must not be null.
    
    Returns:
    
    the annotation of the given type. Can be null.
    
    See Also:
    
    AnnotationUtils.findAnnotation(Method, Class)
  - getRequiredAnnotation
```
default <A extends Annotation> A getRequiredAnnotation(Class<A> annotationType)
                                                throws IllegalStateException
```
    Looks up the annotation of the given type on the PersistentProperty. Will inspect accessors and the potentially backing field and traverse accessor methods to potentially available super types.
    
    Parameters:
    
    annotationType - the annotation to look up, must not be null.
    
    Returns:
    
    the annotation of the given type.
    
    Throws:
    
    IllegalStateException - if the required annotationType is not found.
    
    Since:
    
    2.0
  - findPropertyOrOwnerAnnotation
```
@Nullable
<A extends Annotation> A findPropertyOrOwnerAnnotation(Class<A> annotationType)
```
    Looks up the annotation of the given type on the property and the owning type if no annotation can be found on it. Useful to lookup annotations that can be configured on the type but overridden on an individual property.
    
    Parameters:
    
    annotationType - must not be null.
    
    Returns:
    
    the annotation of the given type. Can be null.
  - isAnnotationPresent
```
boolean isAnnotationPresent(Class<? extends Annotation> annotationType)
```
    Returns whether the PersistentProperty has an annotation of the given type.
    
    Parameters:
    
    annotationType - the annotation to lookup, must not be null.
    
    Returns:
    
    whether the PersistentProperty has an annotation of the given type.
  - usePropertyAccess
```
boolean usePropertyAccess()
```
    Returns whether property access shall be used for reading the property value. This means it will use the getter instead of field access.
    
    Returns:
  - hasActualTypeAnnotation
```
default boolean hasActualTypeAnnotation(Class<? extends Annotation> annotationType)
```
    Returns whether the actual type of the property carries the given annotation.
    
    Parameters:
    
    annotationType - must not be null.
    
    Returns:
    
    Since:
    
    2.1
    
    See Also:
    
    getActualType()
  - getAssociationTargetType
```
@Nullable
Class<?> getAssociationTargetType()
```
    Return the type the property refers to in case it's an association.
    
    Returns:
    
    the type the property refers to in case it's an association or null in case it's not an association, the target entity type is not explicitly defined (either explicitly or through the property type itself).
    
    Since:
    
    2.1
  - getAccessorForOwner
```
default <T> PersistentPropertyAccessor<T> getAccessorForOwner(T owner)
```
    Returns a PersistentPropertyAccessor for the current property's owning value.
    
    Parameters:
    
    owner - must not be null.
    
    Returns:
    
    will never be null.
    
    Since:
    
    2.3

Interface PersistentProperty<P extends PersistentProperty<P>>

Method Summary

Method Detail

getOwner

getName

getType

getTypeInformation

getPersistentEntityTypes

getGetter

getRequiredGetter

getSetter

getRequiredSetter

getWither

getRequiredWither

getField

getRequiredField

getSpelExpression

getAssociation

getRequiredAssociation

isEntity

isIdProperty

isVersionProperty

isCollectionLike

isMap

isArray

isTransient

isWritable

isImmutable

isAssociation

getComponentType

getRawType

getMapValueType

getActualType

findAnnotation

getRequiredAnnotation

findPropertyOrOwnerAnnotation

isAnnotationPresent

usePropertyAccess

hasActualTypeAnnotation

getAssociationTargetType

getAccessorForOwner