blackboard.data.content
Class Lesson

java.lang.Object
  blackboard.data.BbObject
      blackboard.data.content.Content
          blackboard.data.content.ContentFolder
              blackboard.data.content.Lesson

All Implemented Interfaces:

Available, Aggregate, Folder, IBbObject, Positionable, java.lang.Cloneable

public class Lesson
extends ContentFolder

The Lesson class represents a list of content that is meant to be viewed in a linear, guided order. It is an aggregate, and thus has addContent() methods, the implementation of which is inherited from ContentFolder.

Since:

Bb 6.0

Version:

$Revision: #1 $ $Date: 2005/06/27 $

Nested Class Summary

Nested classes/interfaces inherited from class blackboard.data.content.Content

Content.RenderType

Field Summary

static DataType

DATA_TYPE

Fields inherited from class blackboard.data.content.Content

RESOURCE_BUNDLE

Fields inherited from class blackboard.data.BbObject

_bbAttributes

Fields inherited from interface blackboard.data.Positionable

POS_UNDEFINED

Constructor Summary

Lesson()
Default constructor for Lesson objects.

Method Summary

boolean	acceptsType(java.lang.String handler) Returns whether the Lesson may aggregate objects of the specified type.
DataType	getDataType() Returns the DataType identifier for this object.
Sequence	getSequence() Returns the Sequence for this object.

Methods inherited from class blackboard.data.content.ContentFolder

addContent, addContent, getChildren, getIsFolder, getRemoved, remove

Methods inherited from class blackboard.data.content.Content

addContentFile, getAllowGuests, getAllowObservers, getBody, getContentFiles, getContentHandler, getContentStatus, getCourseId, getEndDate, getIsAvailable, getIsDescribed, getIsFromCartridge, getIsLesson, getIsReviewable, getIsSequential, getIsTracked, getLaunchInNewWindow, getOfflineName, getOfflinePath, getParentId, getPersistentTitle, getPosition, getRemovedFiles, getRenderType, getStartDate, getTitle, getTitleColor, getUrl, printTree, removeContentFile, removeContentFile, setAllowGuests, setAllowObservers, setBody, setContentHandler, setCourseId, setEndDate, setIsAvailable, setIsDescribed, setIsFolder, setIsFromCartridge, setIsLesson, setIsReviewable, setIsSequential, setIsTracked, setLaunchInNewWindow, setOfflineName, setOfflinePath, setParentId, setPosition, setRenderType, setStartDate, setTitle, setTitleColor, setUrl, traverseContent, validate

Methods inherited from class blackboard.data.BbObject

clone, getBbAttributes, getCreatedDate, getId, getModifiedDate, persist, setCreatedDate, setId, setModifiedDate, toString

Methods inherited from class java.lang.Object

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

Field Detail

DATA_TYPE

public static final DataType DATA_TYPE

Constructor Detail

Lesson

public Lesson()

Default constructor for Lesson objects. Creates an empty lesson, with the appropriate content attributes set to appropriate defaults for a lessons (also called Learning Units).

Method Detail

acceptsType

public boolean acceptsType(java.lang.String handler)

Returns whether the Lesson may aggregate objects of the specified type. Most content types are allowed. The only types that cannot be added are:

• Folders. Type string resource/x-bb-folder
• Lessons. Type string resource/x-bb-lesson

Specified by:

acceptsType in interface Aggregate

Overrides:

acceptsType in class ContentFolder

Parameters:

handler - string conforming to the content handler identifiers

Returns:

true if the type may be aggregated.

getSequence

public Sequence getSequence()

Returns the Sequence for this object. Currently, this method is not implemented.

Specified by:

getSequence in interface Aggregate

Overrides:

getSequence in class ContentFolder

Returns:

Sequence object

getDataType

public DataType getDataType()

Returns the DataType identifier for this object. Can be used to uniquely identify the "type" of this data object.

Specified by:

getDataType in interface IBbObject

Overrides:

getDataType in class ContentFolder

Returns:

the DataType for this object