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Class PREDATOR.ADT.PolygonObject 

java.lang.Object
   |
   +----PREDATOR.ADT.DataObject
           |
           +----PREDATOR.ADT.PolygonObject
public class PolygonObject
extends DataObject
implements CachingObject, DisplayObject
Encapsulates all in-memory data regarding an polygon ADT object.

See Also:
ADT_polygon

Constructor Index

o PolygonObject()

Method Index

o callback(URL, ADTMetaInfo)
Performs a callback to the server, using the given URL.
o display(ADTMetaInfo)
Displays an object indepently.
o getMessage()
Callback objects have the option of supplying a byte string containing additional information about the callback.
o requiresCallback(ADTMetaInfo)
Determines if this object has a handle on the "full value", or if a callback or deserialization is necessary.
o toString(ADTMetaInfo)
Prints the value of the polygon

Constructors

o PolygonObject 
 public PolygonObject()

Methods

o toString 
 public String toString(ADTMetaInfo MetaInfo)
Prints the value of the polygon

Parameters:
MetaInfo - The meta-info for this object
Returns:
A string holding the value of the polygon
Overrides:
toString in class DataObject
o getMessage 
 public byte[] getMessage()
Callback objects have the option of supplying a byte string containing additional information about the callback. For instance, an image object might specify one of many stored resolutions.

Returns:
A binary message
o callback 
 public void callback(URL CallbackURL,
                      ADTMetaInfo MetaInfo)
Performs a callback to the server, using the given URL. The URL may be opened as a stream, if desired. The contents of the URL will be determined by what the server-side ADT writes out in the ServiceCallback() function (in types.h).

Parameters:
CallbackURL - The URL of the callback object
MetaInfo - The meta-info for this object
o requiresCallback 
 public boolean requiresCallback(ADTMetaInfo MetaInfo)
Determines if this object has a handle on the "full value", or if a callback or deserialization is necessary.

Parameters:
MetaInfo - The meta-info for this object
Returns:
true if this object does not have its "full value" available
o display 
 public void display(ADTMetaInfo MetaInfo) throws RequiresCallbackException
Displays an object indepently. Implementations of this function should be non-blocking for best performance. (For instance, an image should be displayed in an independent frame and execution should proceed while the frame is still open.)

Parameters:
MetaInfo - The meta-info for this object
Throws: RequiresCallbackException
when a callback is required before a display can be made 
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