junitutils
Class LineIterator

java.lang.Object
  junitutils.LineIterator

All Implemented Interfaces:

java.util.Iterator

public class LineIterator

extends java.lang.Object

implements java.util.Iterator

This is a utility class that is an iterator over the lines produced by reading a file. It is used in particular by various JUnit tests.

Author:

David R. Cok

Field Summary

private java.lang.String	nextLine The next value to be returned by the iterator.
private java.io.BufferedReader	r A reader that reads lines from the file.

Constructor Summary

LineIterator(java.lang.String filename)
Starts an iterator reading from the given external process.

Method Summary

boolean	hasNext() Per a standard iterator, returns true if there is another value waiting.
java.lang.Object	next() Per a standard iterator, returns the next value - and throws java.util.NoSuchElementException if the list has been exhausted (hasNext() returns false).
void	remove() This operation will throw an exception, as there is no need for remove in this context.

Methods inherited from class java.lang.Object

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

Field Detail

r

private java.io.BufferedReader r

A reader that reads lines from the file.

nextLine

private java.lang.String nextLine

The next value to be returned by the iterator. We read ahead one so that we know the value of hasNext() when asked.

Constructor Detail

LineIterator

public LineIterator(java.lang.String filename)
             throws java.io.IOException

Starts an iterator reading from the given external process.

Parameters:

filename - The name of the file to be read

Method Detail

hasNext

public boolean hasNext()
                throws java.lang.Error

Per a standard iterator, returns true if there is another value waiting.

Specified by:

hasNext in interface java.util.Iterator

Throws:

java.lang.Error

next

public java.lang.Object next()
                      throws java.util.NoSuchElementException,
                             java.lang.Error

Per a standard iterator, returns the next value - and throws java.util.NoSuchElementException if the list has been exhausted (hasNext() returns false).

Specified by:

next in interface java.util.Iterator

Throws:

java.util.NoSuchElementException

java.lang.Error

remove

public void remove()
            throws java.lang.UnsupportedOperationException

This operation will throw an exception, as there is no need for remove in this context.

Specified by:

remove in interface java.util.Iterator

Throws:

java.lang.UnsupportedOperationException