You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
496 lines
23 KiB
496 lines
23 KiB
/**
|
|
* Condenser.java
|
|
* Copyright 2004 by Michael Peter Christen, mc@yacy.net, Frankfurt am Main, Germany
|
|
* First released 09.01.2004 at http://yacy.net
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with this program in the file lgpl21.txt
|
|
* If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
package net.yacy.document;
|
|
|
|
import java.io.ByteArrayInputStream;
|
|
import java.io.File;
|
|
import java.io.FileInputStream;
|
|
import java.io.FileNotFoundException;
|
|
import java.io.IOException;
|
|
import java.io.InputStream;
|
|
import java.io.UnsupportedEncodingException;
|
|
import java.text.NumberFormat;
|
|
import java.util.HashMap;
|
|
import java.util.HashSet;
|
|
import java.util.Iterator;
|
|
import java.util.Locale;
|
|
import java.util.Map;
|
|
import java.util.Properties;
|
|
import java.util.Set;
|
|
import java.util.SortedSet;
|
|
import java.util.TreeMap;
|
|
|
|
|
|
import net.yacy.cora.document.MultiProtocolURI;
|
|
import net.yacy.cora.document.UTF8;
|
|
import net.yacy.document.language.Identificator;
|
|
import net.yacy.document.parser.html.ImageEntry;
|
|
import net.yacy.kelondro.data.word.Word;
|
|
import net.yacy.kelondro.data.word.WordReferenceRow;
|
|
import net.yacy.kelondro.logging.Log;
|
|
import net.yacy.kelondro.order.Bitfield;
|
|
import net.yacy.kelondro.util.SetTools;
|
|
|
|
|
|
public final class Condenser {
|
|
|
|
// this is the page analysis class
|
|
public final static boolean pseudostemming = false; // switch for removal of words that appear in shortened form
|
|
public final static int wordminsize = 2;
|
|
public final static int wordcut = 2;
|
|
|
|
// category flags that show how the page can be distinguished in different interest groups
|
|
public static final int flag_cat_indexof = 0; // a directory listing page (i.e. containing 'index of')
|
|
public static final int flag_cat_opencontent = 1; // open source, any free stuff
|
|
public static final int flag_cat_business = 2; // web shops, marketing, trade
|
|
public static final int flag_cat_stockfinance = 3; // stock exchange (quotes), finance, economy
|
|
public static final int flag_cat_health = 4; // health
|
|
public static final int flag_cat_sport = 5; // any sport, cars etc.
|
|
public static final int flag_cat_lifestyle = 6; // travel, lifestyle
|
|
public static final int flag_cat_politics = 7; // politics
|
|
public static final int flag_cat_news = 8; // blogs, news pages
|
|
public static final int flag_cat_children = 9; // toys, childrens education, help for parents
|
|
public static final int flag_cat_entertainment = 10; // boulevard, entertainment, cultural content
|
|
public static final int flag_cat_knowledge = 11; // science, school stuff, help for homework
|
|
public static final int flag_cat_computer = 12; // any computer related stuff, networks, operation systems
|
|
public static final int flag_cat_p2p = 13; // p2p support, file-sharing archives etc.
|
|
public static final int flag_cat_sex = 14; // sexual content
|
|
public static final int flag_cat_spam = 15; // pages that anybody would consider as not interesting
|
|
public static final int flag_cat_linux = 16; // pages about linux software
|
|
public static final int flag_cat_macos = 17; // pages about macintosh, apple computers and the mac os
|
|
public static final int flag_cat_windows = 18; // pages about windows os and software
|
|
public static final int flag_cat_osreserve = 19; // reserve
|
|
public static final int flag_cat_hasimage = 20; // the page refers to (at least one) images
|
|
public static final int flag_cat_hasaudio = 21; // the page refers to (at least one) audio file
|
|
public static final int flag_cat_hasvideo = 22; // the page refers to (at least one) videos
|
|
public static final int flag_cat_hasapp = 23; // the page refers to (at least one) application file
|
|
|
|
private final static int numlength = 5;
|
|
private final static NumberFormat intStringFormatter = NumberFormat.getIntegerInstance();
|
|
static {
|
|
intStringFormatter.setMinimumIntegerDigits(numlength);
|
|
intStringFormatter.setMaximumIntegerDigits(numlength);
|
|
}
|
|
|
|
//private Properties analysis;
|
|
private Map<String, Word> words; // a string (the words) to (indexWord) - relation
|
|
|
|
//public int RESULT_NUMB_TEXT_BYTES = -1;
|
|
public int RESULT_NUMB_WORDS = -1;
|
|
public int RESULT_DIFF_WORDS = -1;
|
|
public int RESULT_NUMB_SENTENCES = -1;
|
|
public int RESULT_DIFF_SENTENCES = -1;
|
|
public Bitfield RESULT_FLAGS = new Bitfield(4);
|
|
private Identificator languageIdentificator;
|
|
|
|
public Condenser(
|
|
final Document document,
|
|
final boolean indexText,
|
|
final boolean indexMedia,
|
|
final WordCache meaningLib
|
|
) {
|
|
// if addMedia == true, then all the media links are also parsed and added to the words
|
|
// added media words are flagged with the appropriate media flag
|
|
this.words = new HashMap<String, Word>();
|
|
this.RESULT_FLAGS = new Bitfield(4);
|
|
|
|
// construct flag set for document
|
|
if (!document.getImages().isEmpty()) RESULT_FLAGS.set(flag_cat_hasimage, true);
|
|
if (!document.getAudiolinks().isEmpty()) RESULT_FLAGS.set(flag_cat_hasaudio, true);
|
|
if (!document.getVideolinks().isEmpty()) RESULT_FLAGS.set(flag_cat_hasvideo, true);
|
|
if (!document.getApplinks().isEmpty()) RESULT_FLAGS.set(flag_cat_hasapp, true);
|
|
|
|
this.languageIdentificator = new Identificator();
|
|
|
|
|
|
Map.Entry<MultiProtocolURI, String> entry;
|
|
if (indexText) {
|
|
assert document.getText() != null : document.dc_identifier();
|
|
createCondensement(document.getText(), meaningLib);
|
|
// the phrase counter:
|
|
// phrase 0 are words taken from the URL
|
|
// phrase 1 is the MainTitle
|
|
// phrase 2 is <not used>
|
|
// phrase 3 is the Document Abstract
|
|
// phrase 4 is the Document Author
|
|
// phrase 5 is the Document Publisher
|
|
// phrase 6 are the tags specified in document
|
|
// phrase 10 and above are the section headlines/titles (88 possible)
|
|
// phrase 98 is taken from the embedded anchor/hyperlinks description (REMOVED!)
|
|
// phrase 99 is taken from the media Link url and anchor description
|
|
// phrase 100 and above are lines from the text
|
|
|
|
insertTextToWords(document.dc_title(), 1, WordReferenceRow.flag_app_dc_title, RESULT_FLAGS, true, meaningLib);
|
|
insertTextToWords(document.dc_description(), 3, WordReferenceRow.flag_app_dc_description, RESULT_FLAGS, true, meaningLib);
|
|
insertTextToWords(document.dc_creator(), 4, WordReferenceRow.flag_app_dc_creator, RESULT_FLAGS, true, meaningLib);
|
|
insertTextToWords(document.dc_publisher(), 5, WordReferenceRow.flag_app_dc_creator, RESULT_FLAGS, true, meaningLib);
|
|
insertTextToWords(document.dc_subject(' '), 6, WordReferenceRow.flag_app_dc_description, RESULT_FLAGS, true, meaningLib);
|
|
// missing: tags!
|
|
final String[] titles = document.getSectionTitles();
|
|
for (int i = 0; i < titles.length; i++) {
|
|
insertTextToWords(titles[i], i + 10, WordReferenceRow.flag_app_emphasized, RESULT_FLAGS, true, meaningLib);
|
|
}
|
|
|
|
// anchors: for text indexing we add only the anchor description
|
|
// REMOVED! Reason:
|
|
// words from the anchor description should appear as normal text in the output from the parser
|
|
// to flag these words as appearance in dc_description would confuse, since the user expects such word as titles of
|
|
// pages that are shown in the search result. The words from the URLS should also not appear as part of the index, because they
|
|
// are not visible in the text and could be used to crate fake-content
|
|
/*
|
|
final Iterator<Map.Entry<yacyURL, String>> i = document.getAnchors().entrySet().iterator();
|
|
while (i.hasNext()) {
|
|
entry = i.next();
|
|
if ((entry == null) || (entry.getKey() == null)) continue;
|
|
insertTextToWords(entry.getValue(), 98, indexRWIEntry.flag_app_dc_description, RESULT_FLAGS, true);
|
|
}
|
|
*/
|
|
} else {
|
|
this.RESULT_NUMB_WORDS = 0;
|
|
this.RESULT_DIFF_WORDS = 0;
|
|
this.RESULT_NUMB_SENTENCES = 0;
|
|
this.RESULT_DIFF_SENTENCES = 0;
|
|
}
|
|
|
|
// add the URL components to the word list
|
|
insertTextToWords(document.dc_source().toNormalform(false, true), 0, WordReferenceRow.flag_app_dc_identifier, RESULT_FLAGS, false, meaningLib);
|
|
|
|
if (indexMedia) {
|
|
// add anchor descriptions: here, we also add the url components
|
|
// audio
|
|
Iterator<Map.Entry<MultiProtocolURI, String>> i = document.getAudiolinks().entrySet().iterator();
|
|
while (i.hasNext()) {
|
|
entry = i.next();
|
|
insertTextToWords(entry.getKey().toNormalform(false, false), 99, flag_cat_hasaudio, RESULT_FLAGS, false, meaningLib);
|
|
insertTextToWords(entry.getValue(), 99, flag_cat_hasaudio, RESULT_FLAGS, true, meaningLib);
|
|
}
|
|
|
|
// video
|
|
i = document.getVideolinks().entrySet().iterator();
|
|
while (i.hasNext()) {
|
|
entry = i.next();
|
|
insertTextToWords(entry.getKey().toNormalform(false, false), 99, flag_cat_hasvideo, RESULT_FLAGS, false, meaningLib);
|
|
insertTextToWords(entry.getValue(), 99, flag_cat_hasvideo, RESULT_FLAGS, true, meaningLib);
|
|
}
|
|
|
|
// applications
|
|
i = document.getApplinks().entrySet().iterator();
|
|
while (i.hasNext()) {
|
|
entry = i.next();
|
|
insertTextToWords(entry.getKey().toNormalform(false, false), 99, flag_cat_hasapp, RESULT_FLAGS, false, meaningLib);
|
|
insertTextToWords(entry.getValue(), 99, flag_cat_hasapp, RESULT_FLAGS, true, meaningLib);
|
|
}
|
|
|
|
// images
|
|
final Iterator<ImageEntry> j = document.getImages().values().iterator();
|
|
ImageEntry ientry;
|
|
while (j.hasNext()) {
|
|
ientry = j.next();
|
|
insertTextToWords(ientry.url().toNormalform(false, false), 99, flag_cat_hasimage, RESULT_FLAGS, false, meaningLib);
|
|
insertTextToWords(ientry.alt(), 99, flag_cat_hasimage, RESULT_FLAGS, true, meaningLib);
|
|
}
|
|
|
|
// finally check all words for missing flag entry
|
|
final Iterator<Map.Entry<String, Word>> k = words.entrySet().iterator();
|
|
Word wprop;
|
|
Map.Entry<String, Word> we;
|
|
while (k.hasNext()) {
|
|
we = k.next();
|
|
wprop = we.getValue();
|
|
if (wprop.flags == null) {
|
|
wprop.flags = RESULT_FLAGS.clone();
|
|
words.put(we.getKey(), wprop);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
private void insertTextToWords(
|
|
final String text,
|
|
final int phrase,
|
|
final int flagpos,
|
|
final Bitfield flagstemplate,
|
|
final boolean useForLanguageIdentification,
|
|
final WordCache meaningLib) {
|
|
if (text == null) return;
|
|
String word;
|
|
Word wprop;
|
|
WordTokenizer wordenum;
|
|
try {
|
|
wordenum = new WordTokenizer(new ByteArrayInputStream(text.getBytes("UTF-8")), meaningLib);
|
|
} catch (final UnsupportedEncodingException e) {
|
|
return;
|
|
}
|
|
int pip = 0;
|
|
while (wordenum.hasMoreElements()) {
|
|
word = (wordenum.nextElement().toString()).toLowerCase(Locale.ENGLISH);
|
|
if (useForLanguageIdentification) languageIdentificator.add(word);
|
|
if (word.length() < 2) continue;
|
|
wprop = words.get(word);
|
|
if (wprop == null) wprop = new Word(0, pip, phrase);
|
|
if (wprop.flags == null) wprop.flags = flagstemplate.clone();
|
|
wprop.flags.set(flagpos, true);
|
|
words.put(word, wprop);
|
|
pip++;
|
|
this.RESULT_NUMB_WORDS++;
|
|
this.RESULT_DIFF_WORDS++;
|
|
}
|
|
}
|
|
|
|
public Condenser(final InputStream text, final WordCache meaningLib) {
|
|
this.languageIdentificator = null; // we don't need that here
|
|
// analysis = new Properties();
|
|
words = new TreeMap<String, Word>();
|
|
createCondensement(text, meaningLib);
|
|
}
|
|
|
|
public int excludeWords(final SortedSet<String> stopwords) {
|
|
// subtracts the given stopwords from the word list
|
|
// the word list shrinkes. This returns the number of shrinked words
|
|
final int oldsize = words.size();
|
|
SetTools.excludeDestructive(words, stopwords);
|
|
return oldsize - words.size();
|
|
}
|
|
|
|
public Map<String, Word> words() {
|
|
// returns the words as word/indexWord relation map
|
|
return words;
|
|
}
|
|
|
|
public String language() {
|
|
return this.languageIdentificator.getLanguage();
|
|
}
|
|
|
|
private void createCondensement(final InputStream is, final WordCache meaningLib) {
|
|
assert is != null;
|
|
final Set<String> currsentwords = new HashSet<String>();
|
|
StringBuilder sentence = new StringBuilder(100);
|
|
String word = "";
|
|
String k;
|
|
int wordlen;
|
|
Word wsp, wsp1;
|
|
Phrase psp;
|
|
int wordHandle;
|
|
int wordHandleCount = 0;
|
|
int sentenceHandleCount = 0;
|
|
int allwordcounter = 0;
|
|
int allsentencecounter = 0;
|
|
int idx;
|
|
int wordInSentenceCounter = 1;
|
|
boolean comb_indexof = false, last_last = false, last_index = false;
|
|
final Map<StringBuilder, Phrase> sentences = new HashMap<StringBuilder, Phrase>(100);
|
|
|
|
// read source
|
|
final WordTokenizer wordenum = new WordTokenizer(is, meaningLib);
|
|
while (wordenum.hasMoreElements()) {
|
|
word = (wordenum.nextElement().toString()).toLowerCase(Locale.ENGLISH); // TODO: does toLowerCase work for non ISO-8859-1 chars?
|
|
if (languageIdentificator != null) languageIdentificator.add(word);
|
|
if (word.length() < wordminsize) continue;
|
|
|
|
// distinguish punctuation and words
|
|
wordlen = word.length();
|
|
Iterator<String> it;
|
|
if ((wordlen == 1) && (SentenceReader.punctuation(word.charAt(0)))) {
|
|
// store sentence
|
|
if (sentence.length() > 0) {
|
|
// we store the punctuation symbol as first element of the sentence vector
|
|
allsentencecounter++;
|
|
sentence.insert(0, word); // append at beginning
|
|
if (sentences.containsKey(sentence)) {
|
|
// sentence already exists
|
|
psp = sentences.get(sentence);
|
|
psp.inc();
|
|
idx = psp.handle();
|
|
sentences.put(sentence, psp);
|
|
} else {
|
|
// create new sentence
|
|
idx = sentenceHandleCount++;
|
|
sentences.put(sentence, new Phrase(idx));
|
|
}
|
|
// store to the words a link to this sentence
|
|
it = currsentwords.iterator();
|
|
while (it.hasNext()) {
|
|
k = it.next();
|
|
wsp = words.get(k);
|
|
wsp.check(idx);
|
|
words.put(k, wsp); // is that necessary?
|
|
}
|
|
}
|
|
sentence = new StringBuilder(100);
|
|
currsentwords.clear();
|
|
wordInSentenceCounter = 1;
|
|
} else {
|
|
// check index.of detection
|
|
if ((last_last) && (comb_indexof) && (word.equals("modified"))) {
|
|
this.RESULT_FLAGS.set(flag_cat_indexof, true);
|
|
wordenum.pre(true); // parse lines as they come with CRLF
|
|
}
|
|
if ((last_index) && (wordminsize > 2 || (word.equals("of")))) comb_indexof = true;
|
|
last_last = word.equals("last");
|
|
last_index = word.equals("index");
|
|
|
|
// store word
|
|
allwordcounter++;
|
|
currsentwords.add(word);
|
|
if (words.containsKey(word)) {
|
|
// word already exists
|
|
wsp = words.get(word);
|
|
wordHandle = wsp.posInText;
|
|
wsp.inc();
|
|
} else {
|
|
// word does not yet exist, create new word entry
|
|
wordHandle = wordHandleCount++;
|
|
wsp = new Word(wordHandle, wordInSentenceCounter, sentences.size() + 100);
|
|
wsp.flags = RESULT_FLAGS.clone();
|
|
}
|
|
words.put(word, wsp);
|
|
// we now have the unique handle of the word, put it into the sentence:
|
|
sentence.append(intStringFormatter.format(wordHandle));
|
|
wordInSentenceCounter++;
|
|
}
|
|
}
|
|
// finish last sentence
|
|
if (sentence.length() > 0) {
|
|
allsentencecounter++;
|
|
sentence.insert(0, "."); // append at beginning
|
|
if (sentences.containsKey(sentence)) {
|
|
psp = sentences.get(sentence);
|
|
psp.inc();
|
|
sentences.put(sentence, psp);
|
|
} else {
|
|
sentences.put(sentence, new Phrase(sentenceHandleCount++));
|
|
}
|
|
}
|
|
|
|
// we reconstruct the sentence hashtable
|
|
// and order the entries by the number of the sentence
|
|
// this structure is needed to replace double occurring words in sentences
|
|
final Object[] orderedSentences = new Object[sentenceHandleCount];
|
|
String[] s;
|
|
int wc;
|
|
Object o;
|
|
final Iterator<StringBuilder> sit = sentences.keySet().iterator();
|
|
while (sit.hasNext()) {
|
|
o = sit.next();
|
|
if (o != null) {
|
|
sentence = (StringBuilder) o;
|
|
wc = (sentence.length() - 1) / numlength;
|
|
s = new String[wc + 2];
|
|
psp = sentences.get(sentence);
|
|
s[0] = intStringFormatter.format(psp.occurrences()); // number of occurrences of this sentence
|
|
s[1] = sentence.substring(0, 1); // the termination symbol of this sentence
|
|
for (int i = 0; i < wc; i++) {
|
|
k = sentence.substring(i * numlength + 1, (i + 1) * numlength + 1);
|
|
s[i + 2] = k;
|
|
}
|
|
orderedSentences[psp.handle()] = s;
|
|
}
|
|
}
|
|
|
|
if (pseudostemming) {
|
|
Map.Entry<String, Word> entry;
|
|
// we search for similar words and reorganize the corresponding sentences
|
|
// a word is similar, if a shortened version is equal
|
|
final Iterator<Map.Entry<String, Word>> wi = words.entrySet().iterator(); // enumerates the keys in descending order
|
|
wordsearch: while (wi.hasNext()) {
|
|
entry = wi.next();
|
|
word = entry.getKey();
|
|
wordlen = word.length();
|
|
wsp = entry.getValue();
|
|
for (int i = wordcut; i > 0; i--) {
|
|
if (wordlen > i) {
|
|
k = word.substring(0, wordlen - i);
|
|
if (words.containsKey(k)) {
|
|
// we will delete the word 'word' and repoint the
|
|
// corresponding links
|
|
// in sentences that use this word
|
|
wsp1 = words.get(k);
|
|
final Iterator<Integer> it1 = wsp.phrases(); // we iterate over all sentences that refer to this word
|
|
while (it1.hasNext()) {
|
|
idx = it1.next().intValue(); // number of a sentence
|
|
s = (String[]) orderedSentences[idx];
|
|
for (int j = 2; j < s.length; j++) {
|
|
if (s[j].equals(intStringFormatter.format(wsp.posInText)))
|
|
s[j] = intStringFormatter.format(wsp1.posInText);
|
|
}
|
|
orderedSentences[idx] = s;
|
|
}
|
|
// update word counter
|
|
wsp1.count = wsp1.count + wsp.count;
|
|
words.put(k, wsp1);
|
|
// remove current word
|
|
wi.remove();
|
|
continue wordsearch;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// store result
|
|
//this.RESULT_NUMB_TEXT_BYTES = wordenum.count();
|
|
this.RESULT_NUMB_WORDS = allwordcounter;
|
|
this.RESULT_DIFF_WORDS = wordHandleCount;
|
|
this.RESULT_NUMB_SENTENCES = allsentencecounter;
|
|
this.RESULT_DIFF_SENTENCES = sentenceHandleCount;
|
|
}
|
|
|
|
public static Map<String, Word> getWords(final String text, final WordCache meaningLib) {
|
|
// returns a word/indexWord relation map
|
|
if (text == null) return null;
|
|
ByteArrayInputStream buffer;
|
|
try {
|
|
buffer = new ByteArrayInputStream(text.getBytes("UTF-8"));
|
|
} catch (UnsupportedEncodingException e1) {
|
|
buffer = new ByteArrayInputStream(text.getBytes());
|
|
}
|
|
return new Condenser(buffer, meaningLib).words();
|
|
}
|
|
|
|
public static void main(final String[] args) {
|
|
// read a property file and convert them into configuration lines
|
|
try {
|
|
final File f = new File(args[0]);
|
|
final Properties p = new Properties();
|
|
p.load(new FileInputStream(f));
|
|
final StringBuilder sb = new StringBuilder();
|
|
sb.append("{\n");
|
|
for (int i = 0; i <= 15; i++) {
|
|
sb.append('"');
|
|
final String s = p.getProperty("keywords" + i);
|
|
final String[] l = s.split(",");
|
|
for (int j = 0; j < l.length; j++) {
|
|
sb.append(UTF8.String(Word.word2hash(l[j])));
|
|
}
|
|
if (i < 15) sb.append(",\n");
|
|
}
|
|
sb.append("}\n");
|
|
System.out.println(sb.toString());
|
|
} catch (final FileNotFoundException e) {
|
|
Log.logException(e);
|
|
} catch (final IOException e) {
|
|
Log.logException(e);
|
|
}
|
|
|
|
}
|
|
|
|
}
|