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git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@2149 6c8d7289-2bf4-0310-a012-ef5d649a1542
154 lines
9.0 KiB
Java
154 lines
9.0 KiB
Java
// indexbstractEntry.java
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// (C) 2006 by Michael Peter Christen; mc@anomic.de, Frankfurt a. M., Germany
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// first published 20.05.2006 on http://www.anomic.de
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//
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// This is a part of YaCy, a peer-to-peer based web search engine
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//
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// $LastChangedDate: 2006-04-02 22:40:07 +0200 (So, 02 Apr 2006) $
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// $LastChangedRevision: 1986 $
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// $LastChangedBy: orbiter $
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//
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// LICENSE
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package de.anomic.index;
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import de.anomic.plasma.plasmaWordIndex;
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public abstract class indexAbstractEntry implements indexEntry {
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// the associated hash
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protected String urlHash;
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// discrete values
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protected int hitcount; // number of this words in file
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protected int wordcount; // number of all words in the file
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protected int phrasecount; // number of all phrases in the file
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protected int posintext; // first position of the word in text as number of word; 0=unknown or irrelevant position
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protected int posinphrase; // position within a phrase of the word
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protected int posofphrase; // position of the phrase in the text as count of sentences; 0=unknown; 1=path; 2=keywords; 3=headline; >4: in text
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protected int worddistance;// distance between the words, only used if the index is artificial (from a conjunction)
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protected long lastModified;// calculated by using last-modified
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protected int quality; // result of a heuristic on the source file
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protected byte[] language; // essentially the country code (the TLD as heuristic), two letters lowercase only
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protected char doctype; // type of source
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protected char localflag; // indicates if the index was created locally
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public abstract Object clone();
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public abstract String toEncodedStringForm();
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public abstract byte[] toEncodedByteArrayForm();
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public abstract String toPropertyForm();
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public void combineDistance(indexEntry oe) {
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this.worddistance = this.worddistance + ((indexAbstractEntry) oe).worddistance + Math.abs(this.posintext - ((indexAbstractEntry) oe).posintext);
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this.posintext = Math.min(this.posintext, ((indexAbstractEntry) oe).posintext);
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if (this.posofphrase != ((indexAbstractEntry) oe).posofphrase) this.posinphrase = 0; // (unknown)
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this.posofphrase = Math.min(this.posofphrase, ((indexAbstractEntry) oe).posofphrase);
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this.wordcount = (this.wordcount + ((indexAbstractEntry) oe).wordcount) / 2;
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}
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public void min(indexEntry other) {
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if (this.hitcount > ((indexAbstractEntry) other).hitcount) this.hitcount = ((indexAbstractEntry) other).hitcount;
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if (this.wordcount > ((indexAbstractEntry) other).wordcount) this.wordcount = ((indexAbstractEntry) other).wordcount;
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if (this.phrasecount > ((indexAbstractEntry) other).phrasecount) this.phrasecount = ((indexAbstractEntry) other).phrasecount;
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if (this.posintext > ((indexAbstractEntry) other).posintext) this.posintext = ((indexAbstractEntry) other).posintext;
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if (this.posinphrase > ((indexAbstractEntry) other).posinphrase) this.posinphrase = ((indexAbstractEntry) other).posinphrase;
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if (this.posofphrase > ((indexAbstractEntry) other).posofphrase) this.posofphrase = ((indexAbstractEntry) other).posofphrase;
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if (this.worddistance > ((indexAbstractEntry) other).worddistance) this.worddistance = ((indexAbstractEntry) other).worddistance;
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if (this.lastModified > ((indexAbstractEntry) other).lastModified) this.lastModified = ((indexAbstractEntry) other).lastModified;
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if (this.quality > ((indexAbstractEntry) other).quality) this.quality = ((indexAbstractEntry) other).quality;
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}
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public void max(indexEntry other) {
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if (this.hitcount < ((indexAbstractEntry) other).hitcount) this.hitcount = ((indexAbstractEntry) other).hitcount;
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if (this.wordcount < ((indexAbstractEntry) other).wordcount) this.wordcount = ((indexAbstractEntry) other).wordcount;
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if (this.phrasecount < ((indexAbstractEntry) other).phrasecount) this.phrasecount = ((indexAbstractEntry) other).phrasecount;
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if (this.posintext < ((indexAbstractEntry) other).posintext) this.posintext = ((indexAbstractEntry) other).posintext;
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if (this.posinphrase < ((indexAbstractEntry) other).posinphrase) this.posinphrase = ((indexAbstractEntry) other).posinphrase;
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if (this.posofphrase < ((indexAbstractEntry) other).posofphrase) this.posofphrase = ((indexAbstractEntry) other).posofphrase;
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if (this.worddistance < ((indexAbstractEntry) other).worddistance) this.worddistance = ((indexAbstractEntry) other).worddistance;
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if (this.lastModified < ((indexAbstractEntry) other).lastModified) this.lastModified = ((indexAbstractEntry) other).lastModified;
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if (this.quality < ((indexAbstractEntry) other).quality) this.quality = ((indexAbstractEntry) other).quality;
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}
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public void normalize(indexEntry mi, indexEntry ma) {
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indexAbstractEntry min = (indexAbstractEntry) mi;
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indexAbstractEntry max = (indexAbstractEntry) ma;
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this.hitcount = (this.hitcount == 0) ? 0 : 1 + 255 * (this.hitcount - min.hitcount ) / (1 + max.hitcount - min.hitcount);
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this.wordcount = (this.wordcount == 0) ? 0 : 1 + 255 * (this.wordcount - min.wordcount ) / (1 + max.wordcount - min.wordcount);
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this.phrasecount = (this.phrasecount == 0) ? 0 : 1 + 255 * (this.phrasecount - min.phrasecount ) / (1 + max.phrasecount - min.phrasecount);
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this.posintext = (this.posintext == 0) ? 0 : 1 + 255 * (this.posintext - min.posintext ) / (1 + max.posintext - min.posintext);
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this.posinphrase = (this.posinphrase == 0) ? 0 : 1 + 255 * (this.posinphrase - min.posinphrase ) / (1 + max.posinphrase - min.posinphrase);
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this.posofphrase = (this.posofphrase == 0) ? 0 : 1 + 255 * (this.posofphrase - min.posofphrase ) / (1 + max.posofphrase - min.posofphrase);
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this.worddistance = (this.worddistance == 0) ? 0 : 1 + 255 * (this.worddistance - min.worddistance) / (1 + max.worddistance - min.worddistance);
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this.lastModified = (this.lastModified == 0) ? 0 : 1 + 255 * (this.lastModified - min.lastModified) / (1 + max.lastModified - min.lastModified);
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this.quality = (this.quality == 0) ? 0 : 1 + 255 * (this.quality - min.quality ) / (1 + max.quality - min.quality);
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}
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public indexEntry generateNormalized(indexEntry min, indexEntry max) {
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indexEntry e = (indexAbstractEntry) this.clone();
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e.normalize(min, max);
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return e;
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}
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public String getUrlHash() { return urlHash; }
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public int getQuality() { return quality; }
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public int getVirtualAge() { return plasmaWordIndex.microDateDays(lastModified); }
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public long getLastModified() { return lastModified; }
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public int hitcount() { return hitcount; }
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public int posintext() { return posintext; }
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public int posinphrase() { return posinphrase; }
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public int posofphrase() { return posofphrase; }
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public int worddistance() { return worddistance; }
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public int wordcount() { return wordcount; }
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public int phrasecount() { return phrasecount; }
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public String getLanguage() { return new String(language); }
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public char getType() { return doctype; }
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public boolean isLocal() { return localflag == indexEntryAttribute.LT_LOCAL; }
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public boolean isNewer(indexEntry other) {
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if (other == null) return true;
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if (this.lastModified > ((indexAbstractEntry) other).lastModified) return true;
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if (this.lastModified == ((indexAbstractEntry) other).getLastModified()) {
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if (this.quality > ((indexAbstractEntry) other).quality) return true;
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}
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return false;
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}
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public boolean isOlder(indexEntry other) {
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if (other == null) return false;
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if (this.lastModified < ((indexAbstractEntry) other).getLastModified()) return true;
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if (this.lastModified == ((indexAbstractEntry) other).getLastModified()) {
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if (this.quality < ((indexAbstractEntry) other).quality) return true;
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}
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return false;
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}
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public int domlengthNormalized() {
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return 255 * indexURL.domLengthEstimation(this.urlHash) / 30;
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}
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public static void main(String[] args) {
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// outputs the word hash to a given word
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if (args.length != 1) System.exit(0);
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System.out.println("WORDHASH: " + indexEntryAttribute.word2hash(args[0]));
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}
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}
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