org.omegahat.Environment.IO
Class BasicTaskDisplay

java.lang.Object
  |
  +--org.omegahat.Environment.IO.BasicObjectDisplay
        |
        +--org.omegahat.Environment.IO.TruncatedObjectDisplay
              |
              +--org.omegahat.Environment.IO.BasicTaskDisplay

All Implemented Interfaces:

ObjectDisplayFilter, TaskDisplayFilter

Direct Known Subclasses:

TypeTaskDisplay

public class BasicTaskDisplay

extends TruncatedObjectDisplay

implements TaskDisplayFilter

A class used as the default mechanism for displaying the result of evaluating top-level tasks on the user's terminal. This displays objects by truncating the large objects, providing the beginning and the end values.

Fields inherited from class org.omegahat.Environment.IO.TruncatedObjectDisplay

above, below

Fields inherited from class org.omegahat.Environment.IO.BasicObjectDisplay

OutputElementSeparator, stdout

Constructor Summary

BasicTaskDisplay()

BasicTaskDisplay(java.io.PrintWriter out)

BasicTaskDisplay(java.io.PrintWriter out, int low, int high)
Create a task display object associated with the given output stream and controlling the number of values displayed at the beginning and end of large objects which are truncated.

Method Summary

boolean	display(Task task) Display the result of the specified task by printing the last value of the result.
java.lang.Object	taskObject(Task task) Get the object that we will display from the task object.

Methods inherited from class org.omegahat.Environment.IO.TruncatedObjectDisplay

above, above, below, below, defaultDisplay, display, display, display, display, display, display, displayArray

Methods inherited from class org.omegahat.Environment.IO.BasicObjectDisplay

defaultDisplay, display, display, stdout, stdout, toString, toWriter, writer

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.omegahat.Environment.IO.ObjectDisplayFilter

display, display, toString, toWriter, writer

Constructor Detail

BasicTaskDisplay

public BasicTaskDisplay()

BasicTaskDisplay

public BasicTaskDisplay(java.io.PrintWriter out)

Parameters:

out - The output "device" to which the contents of the objects should be displayed. This can be a file, socket, etc.

BasicTaskDisplay

public BasicTaskDisplay(java.io.PrintWriter out,
                        int low,
                        int high)

Create a task display object associated with the given output stream and controlling the number of values displayed at the beginning and end of large objects which are truncated.

Parameters:

out - the output device to which displays are written.

low - passed to TruncatedObjectDisplay controlling how many elements to show at the beginning of the object.

high - passed to TruncatedObjectDisplay controlling how many objects to show at the end of the object.

Method Detail

display

public boolean display(Task task)

Display the result of the specified task by printing the last value of the result.

Specified by:

display in interface TaskDisplayFilter

taskObject

public java.lang.Object taskObject(Task task)

Get the object that we will display from the task object.