view
Class PolygonFactory

java.lang.Object
  view.PolygonFactory

public class PolygonFactory
extends Object

This class opens and reads the file stated in its constructor call and tries to convert one-line entries into Polygons. A one-line entry is converted into a Polygon via this method:

• Ignore lines starting with '#'
• Construct a StringTokenizer out of the read line.
• Count the number of items: Only even numbers can be accepted.
• Step-by-step convert the tokens into integer pairs.
• If all conversions have been successful, construct a Polygon from the gained pairs.

See Also:

StringTokenizer

Nested Class Summary

(package private) class	PolygonFactory.UnitTester For testing the PolygonFactory class.
(package private) class	PolygonFactory.UnitTester2 Extends the tests.

Field Summary

Polygon[]

Shape

Constructor Summary

PolygonFactory()

PolygonFactory(File config)
Constructs a new PolygonFactory.

Method Summary

static void

main(String[] arg) For testing purposes only.

Methods inherited from class java.lang.Object

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

Field Detail

Shape

public Polygon[] Shape

Constructor Detail

PolygonFactory

public PolygonFactory()

PolygonFactory

public PolygonFactory(File config)

Constructs a new PolygonFactory. On construct, the config file is opened and read. The Polygons are fed into the Shape variable as they are found in the file.

Method Detail

main

public static void main(String[] arg)

For testing purposes only. A new PolygonFactory is constructed from the first command line argument and piped through to a tester unit. Overriding this testing units provide a way to implement various tests on the outer class without enlarging its bytesize.