de.fh_mannheim.mm.dms.framework
Class ContentManager

java.lang.Object
  de.fh_mannheim.mm.dms.framework.ConnectionManager
      de.fh_mannheim.mm.dms.framework.ContentConnectionManager
          de.fh_mannheim.mm.dms.framework.ContentManager

All Implemented Interfaces:

ISearchManager

public class ContentManager

extends ContentConnectionManager

implements ISearchManager

ContentManager loads extracted text to the database and stems the keywords. To search the documentbase, the function searchQuery() is used.

Version:

$Revision: 1.54 $

Author:

Jan Löffler, mail@jlsoft.de

Field Summary

static int	BOOLEAN_AND Public declarations for weights for boolean values
static int	BOOLEAN_NOT
static int	BOOLEAN_OR
static double	MIN_RELEVANCY Minimum relevance
static int	PRIORITY_META Factor for metainformation

Fields inherited from class de.fh_mannheim.mm.dms.framework.ContentConnectionManager

MAX_RESULTS

Constructor Summary

ContentManager(Config cfg, UploadManager uplMgr, StopwordManager stwdMgr)
Constructor.

Method Summary

boolean	addContent(java.lang.String strText, int nID) Add new content.
boolean	addIndex(int nFileID, int nKeywordID, int nFrequency) Adds a document-keyword-pair to the index database.
boolean	addIndexList(int nFileID, java.util.ArrayList aKeywords) Adds a list with document-keyword-pairs to the index database.
boolean	addKeyword(java.lang.String strKeyword) Adds a keyword to the keyword database.
boolean	addKeyword(java.lang.String strKeyword, int nFrequency) Adds a keyword to the keyword database.
boolean	addKeywordList(java.util.ArrayList aKeywords) Adds a list with keywords to the keyword database.
int	addLanguage(Upload upload, StopwordList aStopwords) Adds a the language to the upload by comparing the stopwords.
boolean	addMetaIndexList(int nFileID, java.util.ArrayList aKeywords) Adds a list with document-keyword-pairs to the index database.
boolean	addPreparedQueryWord(java.lang.String strWord, int nBoolType, int nLanguage, int nUserID) Prepare the querystring for request.
boolean	addQueryWord(java.lang.String strWord, double dWeight, int nUserID) Adds a query keyword to the query database.
boolean	addQueryWord(java.lang.String strWord, int nUserID) Adds a query keyword to the query database.
boolean	addUpload(Upload upload) Extract the plaintext from a given document.
void	adjustWeights() Adjust the weights.
boolean	clearQuery(int nUserID) Clear the querystring for request.
static java.lang.StringBuffer	convertText(java.lang.String strPlaintext) Remove umlaute and convert to lowercase.
void	cutOffWords(java.util.ArrayList aWords) Remove all words with frequency 1.
boolean	deleteContent(int nID) Deletes content of a file.
boolean	deleteIndex() Delete all keywords.
boolean	deleteIndex(int nFileID) Delete all keywords from a file.
int	getIndexNum() Counts all index pairs.
int	getKeyword(java.lang.String strKeyword) Get keyword.
int	getKeywordNum() Counts all keywords.
java.util.ArrayList	getKeywords(int nUploadID, int nLimit) Get all keywords of a given document.
double	getLastCompressionRate() Returns the compressionrate of the last file.
int	indexMetaInformation(Upload upload) Index metainformation of upload.
int	indexText(java.lang.StringBuffer strText, Upload upload) Remove stopwords of a string and index keywords.
int	indexTextFile(Upload upload) Extract the plaintext from a text document.
void	optimize() Optimize tables.
SearchResultList	searchQuery(Query query) Prepare the querystring for request.
void	showMessage(java.lang.String strMessage) Show a message.
void	showMessage(java.lang.String strMessage, boolean bShowTime) Show a message.
void	showMessage(java.lang.String strMessage, boolean bShowTime, boolean bNewLine) Show a message.
static java.util.ArrayList	sort(java.lang.String[] strList) Sort list.
java.util.ArrayList	stemWordList(java.util.ArrayList aWords, int nLanguage) Creates a new list with all words stemmed.

Methods inherited from class de.fh_mannheim.mm.dms.framework.ContentConnectionManager

insertIndex, insertKeyword, insertQuery, searchQuery, searchQuery, searchQueryByLanguage, searchQueryByLanguage, updateFileWeight, updateIndexFrequency, updateIndexWeight, updateKeywordFrequency, updateKeywordWeight, updateQuery

Methods inherited from class de.fh_mannheim.mm.dms.framework.ConnectionManager

checkConnection, closeConnection, closePreparedStatement, closeResultSet, closeResultSet, commit, executeQuery, executeQueryGetBool, executeQueryGetDate, executeQueryGetDouble, executeQueryGetInt, executeQueryGetString, executeUpdate, formatBool, formatDate, formatDate, formatDouble, formatInteger, formatString, getPreparedStatement, openConnection, optimizeTable, rollback, startTransaction

Methods inherited from class java.lang.Object

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

Field Detail

BOOLEAN_AND

public static final int BOOLEAN_AND

Public declarations for weights for boolean values

See Also:

Constant Field Values

BOOLEAN_NOT

public static final int BOOLEAN_NOT

See Also:

Constant Field Values

BOOLEAN_OR

public static final int BOOLEAN_OR

See Also:

Constant Field Values

MIN_RELEVANCY

public static final double MIN_RELEVANCY

Minimum relevance

See Also:

Constant Field Values

PRIORITY_META

public static final int PRIORITY_META

Factor for metainformation

See Also:

Constant Field Values

Constructor Detail

ContentManager

public ContentManager(Config cfg,
                      UploadManager uplMgr,
                      StopwordManager stwdMgr)

Constructor.

Parameters:

cfg - Config

uplMgr - UploadManager

Method Detail

addContent

public boolean addContent(java.lang.String strText,
                          int nID)

Add new content.

Parameters:

strText -

nID - ID of file

Returns:

true, if successful

addIndex

public boolean addIndex(int nFileID,
                        int nKeywordID,
                        int nFrequency)

Adds a document-keyword-pair to the index database.

Parameters:

nFileID - Corresponding upload

nKeywordID - Corresponding keyword

nFrequency - Number of found equal keywords

Returns:

true, if successful

addIndexList

public boolean addIndexList(int nFileID,
                            java.util.ArrayList aKeywords)

Adds a list with document-keyword-pairs to the index database.

Parameters:

nFileID - Corresponding upload

aKeywords - Corresponding keywords

Returns:

true, if successful

addKeyword

public boolean addKeyword(java.lang.String strKeyword)

Adds a keyword to the keyword database.

Parameters:

strKeyword - New keyword

Returns:

true, if successful

addKeyword

public boolean addKeyword(java.lang.String strKeyword,
                          int nFrequency)

Adds a keyword to the keyword database.

Parameters:

strKeyword - New keyword

nFrequency - Frequency of keyword

Returns:

true, if successful

addKeywordList

public boolean addKeywordList(java.util.ArrayList aKeywords)

Adds a list with keywords to the keyword database.

Parameters:

aKeywords - New keyword list

Returns:

true, if successful

addLanguage

public int addLanguage(Upload upload,
                       StopwordList aStopwords)

Adds a the language to the upload by comparing the stopwords.

Parameters:

upload - Upload order

aStopwords - Stopwords within this document

Returns:

true, if successful

addMetaIndexList

public boolean addMetaIndexList(int nFileID,
                                java.util.ArrayList aKeywords)

Adds a list with document-keyword-pairs to the index database.

Parameters:

nFileID - Corresponding upload

aKeywords - Corresponding keywords

Returns:

true, if successful

addQueryWord

public boolean addQueryWord(java.lang.String strWord,
                            int nUserID)

Adds a query keyword to the query database.

Parameters:

strWord - New query-keyword

nUserID - ID of user who calls search

Returns:

true, if successful

addQueryWord

public boolean addQueryWord(java.lang.String strWord,
                            double dWeight,
                            int nUserID)

Adds a query keyword to the query database.

Parameters:

strWord - New query-keyword

dWeight - Weight

nUserID - ID of user who calls search

Returns:

true, if successful

addUpload

public boolean addUpload(Upload upload)
                  throws ParsingFailedException

Extract the plaintext from a given document.

Parameters:

upload - Document, which should be parsed

Returns:

true, if successful

Throws:

ParsingFailedException - When document could not be parsed

adjustWeights

public void adjustWeights()

Adjust the weights.

convertText

public static java.lang.StringBuffer convertText(java.lang.String strPlaintext)

Remove umlaute and convert to lowercase.

Parameters:

strPlaintext - Text which should be parsed

Returns:

text with converted umlauten

deleteContent

public boolean deleteContent(int nID)

Deletes content of a file.

Parameters:

nID - ID of file

Returns:

true, if successful

deleteIndex

public boolean deleteIndex()

Delete all keywords.

Returns:

true, if successful

deleteIndex

public boolean deleteIndex(int nFileID)

Delete all keywords from a file.

Parameters:

nFileID - ID of file

Returns:

true, if successful

getIndexNum

public int getIndexNum()

Counts all index pairs.

Returns:

size of index with all pairs

getKeyword

public int getKeyword(java.lang.String strKeyword)

Get keyword.

Parameters:

strKeyword - Keyword

Returns:

id of keyword

getKeywordNum

public int getKeywordNum()

Counts all keywords.

Returns:

size of index with all keywords

getKeywords

public java.util.ArrayList getKeywords(int nUploadID,
                                       int nLimit)

Get all keywords of a given document.

Parameters:

nUploadID - ID of upload

nLimit - Limit of keywords

Returns:

list with all found records

getLastCompressionRate

public double getLastCompressionRate()

Returns the compressionrate of the last file.

Returns:

compressionrate

indexMetaInformation

public int indexMetaInformation(Upload upload)

Index metainformation of upload.

Parameters:

upload - Upload with metainformation

Returns:

number of indexed keywords

indexText

public int indexText(java.lang.StringBuffer strText,
                     Upload upload)

Remove stopwords of a string and index keywords.

Parameters:

strText - Text

upload - Upload

Returns:

number of indexed keywords

indexTextFile

public int indexTextFile(Upload upload)

Extract the plaintext from a text document.

Parameters:

upload - Upload

Returns:

number of indexed keywords

clearQuery

public boolean clearQuery(int nUserID)

Clear the querystring for request.

Parameters:

nUserID - ID of user who calls search

Returns:

true, if successful

addPreparedQueryWord

public boolean addPreparedQueryWord(java.lang.String strWord,
                                    int nBoolType,
                                    int nLanguage,
                                    int nUserID)

Prepare the querystring for request.

Parameters:

strWord - Word

nBoolType - Weight

nLanguage - Language of search

nUserID - ID of user who calls search

Returns:

true, if successfull

searchQuery

public SearchResultList searchQuery(Query query)

Prepare the querystring for request.

Specified by:

searchQuery in interface ISearchManager

Parameters:

query - Searchtext

Returns:

SearchResultList

optimize

public void optimize()

Optimize tables.

cutOffWords

public void cutOffWords(java.util.ArrayList aWords)

Remove all words with frequency 1.

Parameters:

aWords - ArrayList with words to be checked

showMessage

public void showMessage(java.lang.String strMessage)

Show a message.

Parameters:

strMessage - Message that should be displayed

showMessage

public void showMessage(java.lang.String strMessage,
                        boolean bShowTime)

Show a message.

Parameters:

strMessage - Message that should be displayed

bShowTime - Should time be displayed behind message

showMessage

public void showMessage(java.lang.String strMessage,
                        boolean bShowTime,
                        boolean bNewLine)

Show a message.

Parameters:

strMessage - Message that should be displayed

bShowTime - Should time be displayed behind message

bNewLine - Should a line break follow the text

sort

public static java.util.ArrayList sort(java.lang.String[] strList)

Sort list.

Parameters:

strList - StringList to be sorted

stemWordList

public java.util.ArrayList stemWordList(java.util.ArrayList aWords,
                                        int nLanguage)

Creates a new list with all words stemmed.

Parameters:

aWords - ArrayList with words to be stemmed

nLanguage - Language of keywords

Returns:

ArrayList with stemmed words