java.lang.Object
- org.tsugi.basiclti.ContentItem

```
public class ContentItem
extends Object
```

Field Summary

Fields
Modifier and Type	Field	Description
`static String`	`ACCEPT_MEDIA_TYPES`
`static String`	`ACCEPT_MULTIPLE`
`static String`	`BAD_CONTENT_MESSAGE`
`static String`	`BAD_DATA_MESSAGE`
`static String`	`CONTENT_ITEMS`
`static String`	`CUSTOM`
`static String`	`ICON`
`static String`	`LINEITEM`
`static String`	`MEDIA_ALL`
`static String`	`MEDIA_CC`
`static String`	`MEDIA_CC_1_1`
`static String`	`MEDIA_CC_1_2`
`static String`	`MEDIA_CC_1_3`
`static String`	`MEDIA_LTILINKITEM`
`static String`	`NO_CONTENT_ITEMS`
`static String`	`NO_DATA_MESSAGE`
`static String`	`NO_GRAPH_MESSAGE`
`static String`	`SCORE_CONSTRAINTS`
`static String`	`SCORE_CONSTRAINTS_EXTRA_CREDIT_MAXIMUM`
`static String`	`SCORE_CONSTRAINTS_NORMAL_MAXIMUM`
`static String`	`SCORE_CONSTRAINTS_TOTAL_MAXIMUM`
`static String`	`TEXT`
`static String`	`TITLE`
`static String`	`TYPE_CONTENTITEM`
`static String`	`TYPE_FILEITEM`
`static String`	`TYPE_IMPORTITEM`
`static String`	`TYPE_LTILINKITEM`
`static String`	`URL`

Constructor Summary

Constructors
Constructor Description

ContentItem(HttpServletRequest req)
We check for the fields essential for the class to operate here.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static String`	`buildLaunch(String contentLaunch, String contentReturn, Properties contentData)`	Build up a ContentItem launch URL from a base url, return url and extra data
`String`	`getBaseString()`	Return the base string
`org.json.simple.JSONObject`	`getContentItem()`	Retrieve the parsed tool_proxy
`Properties`	`getDataProperties()`	Get the data properties from the incoming request
`String`	`getErrorMessage()`	Return the error message
`org.json.simple.JSONArray`	`getGraph()`	Retrieve the @graph from the content item
`org.json.simple.JSONObject`	`getItemOfType(String itemType)`	Retrieve a particular type from the graph
`static Double`	`getScoreMaximum(org.json.simple.JSONObject lineItem)`	Get the maximum score from a lineItem This logic is to produce the DeepLink equivalent of maxScore from a Content Item
`String`	`toString()`	Return a string
`boolean`	`validate(String oauth_consumer_key, String oauth_secret, String URL)`	Validate the incoming request

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Field Detail
  - ACCEPT_MEDIA_TYPES
```
public static final String ACCEPT_MEDIA_TYPES
```
    See Also:
    
    Constant Field Values
  - MEDIA_LTILINKITEM
```
public static String MEDIA_LTILINKITEM
```
  - MEDIA_ALL
```
public static String MEDIA_ALL
```
  - ACCEPT_MULTIPLE
```
public static String ACCEPT_MULTIPLE
```
  - MEDIA_CC_1_1
```
public static final String MEDIA_CC_1_1
```
    See Also:
    
    Constant Field Values
  - MEDIA_CC_1_2
```
public static final String MEDIA_CC_1_2
```
    See Also:
    
    Constant Field Values
  - MEDIA_CC_1_3
```
public static final String MEDIA_CC_1_3
```
    See Also:
    
    Constant Field Values
  - MEDIA_CC
```
public static final String MEDIA_CC
```
    See Also:
    
    Constant Field Values
  - TYPE_LTILINKITEM
```
public static final String TYPE_LTILINKITEM
```
    See Also:
    
    Constant Field Values
  - TYPE_CONTENTITEM
```
public static final String TYPE_CONTENTITEM
```
    See Also:
    
    Constant Field Values
  - TYPE_FILEITEM
```
public static final String TYPE_FILEITEM
```
    See Also:
    
    Constant Field Values
  - TYPE_IMPORTITEM
```
public static final String TYPE_IMPORTITEM
```
    See Also:
    
    Constant Field Values
  - TITLE
```
public static final String TITLE
```
    See Also:
    
    Constant Field Values
  - TEXT
```
public static final String TEXT
```
    See Also:
    
    Constant Field Values
  - URL
```
public static final String URL
```
    See Also:
    
    Constant Field Values
  - LINEITEM
```
public static final String LINEITEM
```
    See Also:
    
    Constant Field Values
  - SCORE_CONSTRAINTS
```
public static final String SCORE_CONSTRAINTS
```
    See Also:
    
    Constant Field Values
  - SCORE_CONSTRAINTS_NORMAL_MAXIMUM
```
public static final String SCORE_CONSTRAINTS_NORMAL_MAXIMUM
```
    See Also:
    
    Constant Field Values
  - SCORE_CONSTRAINTS_EXTRA_CREDIT_MAXIMUM
```
public static final String SCORE_CONSTRAINTS_EXTRA_CREDIT_MAXIMUM
```
    See Also:
    
    Constant Field Values
  - SCORE_CONSTRAINTS_TOTAL_MAXIMUM
```
public static final String SCORE_CONSTRAINTS_TOTAL_MAXIMUM
```
    See Also:
    
    Constant Field Values
  - CUSTOM
```
public static final String CUSTOM
```
    See Also:
    
    Constant Field Values
  - ICON
```
public static final String ICON
```
    See Also:
    
    Constant Field Values
  - CONTENT_ITEMS
```
public static final String CONTENT_ITEMS
```
    See Also:
    
    Constant Field Values
  - NO_CONTENT_ITEMS
```
public static final String NO_CONTENT_ITEMS
```
    See Also:
    
    Constant Field Values
  - BAD_CONTENT_MESSAGE
```
public static final String BAD_CONTENT_MESSAGE
```
    See Also:
    
    Constant Field Values
  - NO_DATA_MESSAGE
```
public static final String NO_DATA_MESSAGE
```
    See Also:
    
    Constant Field Values
  - NO_GRAPH_MESSAGE
```
public static final String NO_GRAPH_MESSAGE
```
    See Also:
    
    Constant Field Values
  - BAD_DATA_MESSAGE
```
public static final String BAD_DATA_MESSAGE
```
    See Also:
    
    Constant Field Values
- Constructor Detail
  - ContentItem
```
public ContentItem(HttpServletRequest req)
```
    We check for the fields essential for the class to operate here.
- Method Detail
  - validate
```
public boolean validate(String oauth_consumer_key,
                        String oauth_secret,
                        String URL)
```
    Validate the incoming request
    
    Parameters:
    
    URL - The URL of the incoming request. If this in null, the URL is taken from the request object. Sometimes the request object can be misleading when sitting behind a load balancer or some kind of proxy.
  - toString
```
public String toString()
```
    Return a string
    
    Overrides:
    
    toString in class Object
  - getContentItem
```
public org.json.simple.JSONObject getContentItem()
```
    Retrieve the parsed tool_proxy
  - getGraph
```
public org.json.simple.JSONArray getGraph()
```
    Retrieve the @graph from the content item
  - getItemOfType
```
public org.json.simple.JSONObject getItemOfType(String itemType)
```
    Retrieve a particular type from the graph
    
    Parameters:
    
    String - messageType - Which item type you are looking for
  - getDataProperties
```
public Properties getDataProperties()
```
    Get the data properties from the incoming request
  - getBaseString
```
public String getBaseString()
```
    Return the base string
  - getErrorMessage
```
public String getErrorMessage()
```
    Return the error message
  - buildLaunch
```
public static String buildLaunch(String contentLaunch,
                                 String contentReturn,
                                 Properties contentData)
```
    Build up a ContentItem launch URL from a base url, return url and extra data
  - getScoreMaximum
```
public static Double getScoreMaximum(org.json.simple.JSONObject lineItem)
```
    Get the maximum score from a lineItem This logic is to produce the DeepLink equivalent of maxScore from a Content Item

Class ContentItem

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

ACCEPT_MEDIA_TYPES

MEDIA_LTILINKITEM

MEDIA_ALL

ACCEPT_MULTIPLE

MEDIA_CC_1_1

MEDIA_CC_1_2

MEDIA_CC_1_3

MEDIA_CC

TYPE_LTILINKITEM

TYPE_CONTENTITEM

TYPE_FILEITEM

TYPE_IMPORTITEM

TITLE

TEXT

URL

LINEITEM

SCORE_CONSTRAINTS

SCORE_CONSTRAINTS_NORMAL_MAXIMUM

SCORE_CONSTRAINTS_EXTRA_CREDIT_MAXIMUM

SCORE_CONSTRAINTS_TOTAL_MAXIMUM

CUSTOM

ICON

CONTENT_ITEMS

NO_CONTENT_ITEMS

BAD_CONTENT_MESSAGE

NO_DATA_MESSAGE

NO_GRAPH_MESSAGE

BAD_DATA_MESSAGE

Constructor Detail

ContentItem

Method Detail

validate

toString

getContentItem

getGraph

getItemOfType

getDataProperties

getBaseString

getErrorMessage

buildLaunch

getScoreMaximum