Package org.somda.sdc.biceps.common.storage.helper

Class MdibStorageUtil

java.lang.Object

org.somda.sdc.biceps.common.storage.helper.MdibStorageUtil

public class MdibStorageUtil
extends Object

Helper class to expose information hosted by MdibStorage.

MdibStorageUtil is used for but not limited to type-dependent data exposition.

Method Summary

Modifier and Type	Method	Description
List<MdibEntity>	exposeEntityList(Map<String,MdibEntity> entities, Collection<String> collection)	Takes a map of entities and a collection of handles and converts it to a list of entities.
<T> Optional<T>	exposeInstance(Object instance, Class<T> clazz)	Accepts an object of a certain instance and cast it to a given type.
<T,V> List<T>	exposeListOfType(Collection<V> collection, Class<T> clazz)	Accepts a collection of objects and cast it to a list of the given type.

Methods inherited from class java.lang.Object

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

Method Detail

exposeInstance

public <T> Optional<T> exposeInstance(@Nullable
                                      Object instance,
                                      Class<T> clazz)

Accepts an object of a certain instance and cast it to a given type.

Type Parameters:

T - the resulting type.

Parameters:

instance - the instance to cast.

clazz - the class that the instance is supposed to be cast to.

Returns:

a cast version of instance or Optional.empty() if instance is null or not assignable from the given type.

exposeListOfType

public <T,V> List<T> exposeListOfType(Collection<V> collection,
                                            Class<T> clazz)

Accepts a collection of objects and cast it to a list of the given type.

Type Parameters:

T - the resulting type.

V - the collection type.

Parameters:

collection - the collection with objects to cast.

clazz - the class that the collection is supposed to carry.

Returns:

a cast version of collection as list that only includes assignable objects.

exposeEntityList

public List<MdibEntity> exposeEntityList(Map<String,MdibEntity> entities,
                                         Collection<String> collection)

Takes a map of entities and a collection of handles and converts it to a list of entities.

Parameters:

entities - the entities to access.

collection - an ordered collection of handles.

Returns:

a list of entities sorted by the order of collection. Entities that cannot be found in entities are omitted from the result.