Package org.gcube.informationsystem.discovery.knowledge

Class ClassInformation

java.lang.Object

org.gcube.informationsystem.discovery.knowledge.ClassInformation

All Implemented Interfaces:

NodeInformation<Class<Element>>, TypeInformation<Class<Element>>

public class ClassInformation
extends Object
implements TypeInformation<Class<Element>>

An implementation of TypeInformation for Class<Element> objects.

This class provides methods to extract type information, such as identifiers and parent-child relationships, from Java Class objects representing Information System elements.

Author:

Luca Frosini (ISTI - CNR)

Constructor Summary

Constructors

Constructor	Description
ClassInformation()

Method Summary

Modifier and Type	Method	Description
AccessType	getAccessType(Class<Element> clz)	Returns the AccessType of the given element.
String	getIdentifier(Class<Element> clz)	Returns a unique identifier for the given element.
List<String>	getParentIdentifiers(Class<Element> root, Class<Element> clz)	Returns the identifiers of the parents of the given element, in the order that decides precedence among them.
Class<Element>	getRoot(AccessType accessType)	Returns the root element for a given AccessType.

Methods inherited from class java.lang.Object

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

Constructor Detail

ClassInformation

public ClassInformation()

Method Detail

getIdentifier

public String getIdentifier(Class<Element> clz)

Returns a unique identifier for the given element.

Specified by:

getIdentifier in interface NodeInformation<Class<Element>>

Parameters:

clz - The element.

Returns:

The unique identifier.

getParentIdentifiers

public List<String> getParentIdentifiers(Class<Element> root,
                                         Class<Element> clz)

Returns the identifiers of the parents of the given element, in the order that decides precedence among them.

A List because the order is read: Dag.addNode(Object) takes the first parent when the DAG does not allow multiple inheritance, so which one comes first decides where the node is attached. A Set would leave that to the implementation's choice of collection.

Specified by:

getParentIdentifiers in interface NodeInformation<Class<Element>>

Parameters:

root - The root element of the DAG.

clz - The element.

Returns:

The parent identifiers, most significant first.

getAccessType

public AccessType getAccessType(Class<Element> clz)

Returns the AccessType of the given element.

Specified by:

getAccessType in interface TypeInformation<Class<Element>>

Parameters:

clz - The element.

Returns:

The access type.

getRoot

public Class<Element> getRoot(AccessType accessType)

Returns the root element for a given AccessType.

Specified by:

getRoot in interface TypeInformation<Class<Element>>

Parameters:

accessType - The access type.

Returns:

The root element.