Class Search

Object

Search

public class Search
extends Object

Search class will prepare the necessary data structures for searching and then execute provided queries.

Field Summary

Fields

Modifier and Type	Field and Description
static List<Page>	pageList Parsed pages.
private String	pageListFile Page List File Path
static List<Result>	resultSet List of Results.
static List<Word>	wordList List of Word objects.
private String	wordListFile Word List File Path

Constructor Summary

Constructors

Constructor and Description
Search(String wordListFile, String pageListFile) Constructor for Search should load word list and page list from object files specified.

Method Summary

Modifier and Type	Method and Description
List<Result>	executeQuery(String query) Execute a query over the built tables and return an ArrayList of Result objects.
void	nullCheck() Utility method to check if we have not read in our lists from file.
void	setup(String wordListFile, String pageListFile) Read in word and page table Objects from files.
void	sort() Method to sort our ArrayList of Results by their score.

Methods inherited from class Object

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

Field Detail

pageList

public static List<Page> pageList

Parsed pages. We will read in the list we made in the Crawler class and save it to this global static variable.

wordList

public static List<Word> wordList

List of Word objects. We will read in the list we made in the Crawler class and save it to this global static variable.

resultSet

public static List<Result> resultSet

List of Results. This will be shared by the threads. This list must be designed to be resilient to double counting by competing threads. Take a look at the Synchronizing Lists section of the handout for information on how to handle this.

wordListFile

private String wordListFile

Word List File Path

pageListFile

private String pageListFile

Page List File Path

Constructor Detail

Search

public Search(String wordListFile,
              String pageListFile)

Constructor for Search should load word list and page list from object files specified.

Parameters:

wordListFile - path to the serialized word list file

pageListFile - path to the serialized page list file

Method Detail

setup

public void setup(String wordListFile,
                  String pageListFile)

Read in word and page table Objects from files.

Parameters:

wordListFile - path to the serialized word list file

pageListFile - path to the serialized page list file

executeQuery

public List<Result> executeQuery(String query)

Execute a query over the built tables and return an ArrayList of Result objects.

Parameters:

query - query to execute

Returns:

ArrayList of results.

nullCheck

public void nullCheck()

Utility method to check if we have not read in our lists from file. If we haven't, call the setup() method.

sort

public void sort()

Method to sort our ArrayList of Results by their score. Since the Result List is global, we don't need to pass it as a parameter or return it - we can simply access it within the method.