T
- - the type of the Referent object@ExperimentalApi
public abstract class Reference<T>
extends java.lang.Object
implements java.lang.Iterable<T>
Constructor and Description |
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Reference() |
Modifier and Type | Method and Description |
---|---|
static <T> Reference<T> |
collapsed(java.lang.Class objClass,
java.util.Map idProperties) |
static <T> Reference<T> |
collapsed(T obj)
create a collapse reference to the given object
|
static <T> Reference<T> |
empty(java.lang.Class<T> referrentClass)
create an empty reference to the given class
|
abstract boolean |
exists() |
abstract T |
get() |
abstract java.util.Map<java.lang.Object,java.lang.Object> |
getIdProperties()
A map of properties key by the idProperty enum in the model class for the referent object.
|
java.lang.Object |
getIdProperty(java.lang.Enum key) |
abstract boolean |
isExpanded()
indicates a reference is expanded and can be resolved to an object by calling get, or whether
the reference is collapsed and calling get will throw an exception.
|
static <T> Reference<T> |
orEmpty(Reference<T> reference,
java.lang.Class<T> referentClass) |
static <T> Reference<T> |
orEmpty(T entity,
java.lang.Class<T> referentClass) |
abstract java.lang.Class<? extends T> |
referentClass() |
static <T> Reference<T> |
to(T obj)
create an exanded reference to the referent object
|
public abstract T get() throws java.lang.IllegalStateException
java.lang.IllegalStateException
public abstract boolean exists()
public abstract boolean isExpanded()
public abstract java.util.Map<java.lang.Object,java.lang.Object> getIdProperties()
public java.lang.Object getIdProperty(java.lang.Enum key)
public abstract java.lang.Class<? extends T> referentClass()
public static <T> Reference<T> empty(java.lang.Class<T> referrentClass)
T
- referrentClass
- public static <T> Reference<T> orEmpty(Reference<T> reference, java.lang.Class<T> referentClass)
T
- reference
- referentClass
- public static <T> Reference<T> orEmpty(T entity, java.lang.Class<T> referentClass)
public static <T> Reference<T> collapsed(T obj)
obj
- public static <T> Reference<T> collapsed(java.lang.Class objClass, java.util.Map idProperties)
public static <T> Reference<T> to(T obj)
obj
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