maiolum.plainxml.indexing
Class IndexIterator

java.lang.Object
  maiolum.plainxml.indexing.IndexIterator

All Implemented Interfaces:

java.util.Iterator

public class IndexIterator

extends java.lang.Object

implements java.util.Iterator

Parses IndexItems from BufferedReader. Parsed items can be retrieved through the Iterator methods.

Author:

Robert Novotny

Constructor Summary

IndexIterator(java.io.BufferedReader reader)
Constructs new IndexIterator over given BufferedReader.

IndexIterator(java.lang.String filename)
Constructs new IndexIterator over index specified by filename in its String parameter.

Method Summary

java.io.BufferedReader	getReader() Returns associated BufferedReader, from which will be the index read.
boolean	hasNext() Determines, whether next call of next() method will return a valid non-&null; IndexItem.
static void	main(java.lang.String[] args)
java.lang.Object	next() Retrieves next IndexItem from underlying index.
void	remove() This class does not support this method.
void	setReader(java.io.BufferedReader reader) Associates given BufferedReader with this Iterator.

Methods inherited from class java.lang.Object

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

Constructor Detail

IndexIterator

public IndexIterator(java.io.BufferedReader reader)
              throws IndexIOException

Constructs new IndexIterator over given BufferedReader. This method also reads first IndexItem and prepares it to be served in the following next() method call;

Parameters:

reader -

Throws:

IndexIOException, - if first IndexItem cannot be read from the BufferedReader.

IndexIOException

IndexIterator

public IndexIterator(java.lang.String filename)
              throws IndexIOException

Constructs new IndexIterator over index specified by filename in its String parameter. Also reads first IndexItem and prepares it to be served in the following next() method call;

Throws:

IndexIOException, - if first IndexItem cannot be read from the constructed BufferedReader.

IndexIOException

Method Detail

getReader

public java.io.BufferedReader getReader()

Returns associated BufferedReader, from which will be the index read.

setReader

public void setReader(java.io.BufferedReader reader)

Associates given BufferedReader with this Iterator.

hasNext

public boolean hasNext()

Determines, whether next call of next() method will return a valid non-&null; IndexItem. If there are no more items available, it also closes underlying BufferedReader.

Specified by:

hasNext in interface java.util.Iterator

next

public java.lang.Object next()

Retrieves next IndexItem from underlying index.

Specified by:

next in interface java.util.Iterator

Returns:

next IndexItem, or &null; if no more IndexItems are available.

remove

public void remove()

This class does not support this method.

Specified by:

remove in interface java.util.Iterator

main

public static void main(java.lang.String[] args)
                 throws java.lang.Exception

Throws:

java.lang.Exception