# Class RelationTypeSupport

java.lang.Object
javax.management.relation.RelationTypeSupport

All Implemented Interfaces:
  `Serializable, RelationType`

public class RelationTypeSupport extends Object implements RelationType
A RelationTypeSupport object implements the RelationType interface.

It represents a relation type, providing role information for each role expected to be supported in every relation of that type.

A relation type includes a relation type name and a list of role infos (represented by RoleInfo objects).

A relation type has to be declared in the Relation Service:

- either using the createRelationType() method, where a RelationTypeSupport object will be created and kept in the Relation Service

- either using the addRelationType() method where the user has to create an object implementing the RelationType interface, and this object will be used as representing a relation type in the Relation Service.

The serialVersionUID of this class is `4611072955724144607L`.

Since:
  1.5
See Also:
  - Serialized Form

- ## Constructor Summary

  Constructors
  Modifier
  Constructor
  Description
  `protected`
  `RelationTypeSupport(String relationTypeName)`
  Constructor to be used for subclasses.
  ``
  `RelationTypeSupport(String relationTypeName, RoleInfo[] roleInfoArray)`
  Constructor where all role definitions are dynamically created and passed as parameter.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `protected void`
  `addRoleInfo(RoleInfo roleInfo)`
  Add a role info.
  `String`
  `getRelationTypeName()`
  Returns the relation type name.
  `RoleInfo`
  `getRoleInfo(String roleInfoName)`
  Returns the role info (RoleInfo object) for the given role info name (null if not found).
  `List<RoleInfo>`
  `getRoleInfos()`
  Returns the list of role definitions (ArrayList of RoleInfo objects).

  ### Methods declared in class Object

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

- ## Constructor Details

  - ### RelationTypeSupport

    public RelationTypeSupport(String relationTypeName, RoleInfo[] roleInfoArray) throws IllegalArgumentException, InvalidRelationTypeException
    Constructor where all role definitions are dynamically created and passed as parameter.
    Parameters:
      `relationTypeName` - Name of relation type
      `roleInfoArray` - List of role definitions (RoleInfo objects)
    Throws:
      `IllegalArgumentException` - if null parameter
      `InvalidRelationTypeException` - if:

      - the same name has been used for two different roles

      - no role info provided

      - one null role info provided

  - ### RelationTypeSupport

    protected RelationTypeSupport(String relationTypeName)
    Constructor to be used for subclasses.
    Parameters:
      `relationTypeName` - Name of relation type.
    Throws:
      `IllegalArgumentException` - if null parameter.

- ## Method Details

  - ### getRelationTypeName

    public String getRelationTypeName()
    Returns the relation type name.
    Specified by:
      `getRelationTypeName` in interface `RelationType`
    Returns:
      the relation type name.

  - ### getRoleInfos

    public List<RoleInfo> getRoleInfos()
    Returns the list of role definitions (ArrayList of RoleInfo objects).
    Specified by:
      `getRoleInfos` in interface `RelationType`
    Returns:
      an `ArrayList` of `RoleInfo`.

  - ### getRoleInfo

    public RoleInfo getRoleInfo(String roleInfoName) throws IllegalArgumentException, RoleInfoNotFoundException
    Returns the role info (RoleInfo object) for the given role info name (null if not found).
    Specified by:
      `getRoleInfo` in interface `RelationType`
    Parameters:
      `roleInfoName` - role info name
    Returns:
      RoleInfo object providing role definition does not exist
    Throws:
      `IllegalArgumentException` - if null parameter
      `RoleInfoNotFoundException` - if no role info with that name in relation type.

  - ### addRoleInfo

    protected void addRoleInfo(RoleInfo roleInfo) throws IllegalArgumentException, InvalidRelationTypeException
    Add a role info. This method of course should not be used after the creation of the relation type, because updating it would invalidate that the relations created associated to that type still conform to it. Can throw a RuntimeException if trying to update a relation type declared in the Relation Service.
    Parameters:
      `roleInfo` - role info to be added.
    Throws:
      `IllegalArgumentException` - if null parameter.
      `InvalidRelationTypeException` - if there is already a role info in current relation type with the same name.