git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@893 6c8d7289-2bf4-0310-a012-ef5d649a1542pull/1/head
orbiter
20 years ago
parent
579b22d8ff
commit
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// plasmaSearchEvent.java
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// -----------------------
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// part of YACY
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// (C) by Michael Peter Christen; mc@anomic.de
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// first published on http://www.anomic.de
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// Frankfurt, Germany, 2005
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// Created: 10.10.2005
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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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//
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// Using this software in any meaning (reading, learning, copying, compiling,
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// running) means that you agree that the Author(s) is (are) not responsible
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// for cost, loss of data or any harm that may be caused directly or indirectly
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// by usage of this softare or this documentation. The usage of this software
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// is on your own risk. The installation and usage (starting/running) of this
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// software may allow other people or application to access your computer and
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// any attached devices and is highly dependent on the configuration of the
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// software which must be done by the user of the software; the author(s) is
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// (are) also not responsible for proper configuration and usage of the
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// software, even if provoked by documentation provided together with
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// the software.
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//
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// Any changes to this file according to the GPL as documented in the file
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// gpl.txt aside this file in the shipment you received can be done to the
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// lines that follows this copyright notice here, but changes must not be
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// done inside the copyright notive above. A re-distribution must contain
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// the intact and unchanged copyright notice.
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// Contributions and changes to the program code must be marked as such.
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package de.anomic.plasma;
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public final class plasmaSearchEvent {
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public plasmaSearchEvent() {
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}
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}
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// plasmaSearchResult.java
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// -----------------------
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// part of YACY
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// (C) by Michael Peter Christen; mc@anomic.de
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// first published on http://www.anomic.de
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// Frankfurt, Germany, 2005
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// Created: 10.10.2005
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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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//
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// Using this software in any meaning (reading, learning, copying, compiling,
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// running) means that you agree that the Author(s) is (are) not responsible
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// for cost, loss of data or any harm that may be caused directly or indirectly
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// by usage of this softare or this documentation. The usage of this software
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// is on your own risk. The installation and usage (starting/running) of this
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// software may allow other people or application to access your computer and
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// any attached devices and is highly dependent on the configuration of the
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// software which must be done by the user of the software; the author(s) is
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// (are) also not responsible for proper configuration and usage of the
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// software, even if provoked by documentation provided together with
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// the software.
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//
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// Any changes to this file according to the GPL as documented in the file
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// gpl.txt aside this file in the shipment you received can be done to the
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// lines that follows this copyright notice here, but changes must not be
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// done inside the copyright notive above. A re-distribution must contain
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// the intact and unchanged copyright notice.
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// Contributions and changes to the program code must be marked as such.
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package de.anomic.plasma;
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import java.util.TreeMap;
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import java.util.Set;
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import java.util.HashSet;
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import java.util.ArrayList;
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import java.util.Iterator;
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import java.net.URL;
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import de.anomic.kelondro.kelondroMScoreCluster;
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import de.anomic.server.serverCodings;
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public final class plasmaSearchResult {
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public static final char O_QUALITY = 'q';
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public static final char O_AGE = 'a';
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public static final String splitrex = " |/|\\(|\\)|-|\\:|_|\\.|,|\\?|!|'|" + '"';
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private TreeMap pageAcc; // key = order hash; value = plasmaLURL.entry
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private kelondroMScoreCluster ref; // reference score computation for the commonSense heuristic
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private Set searchhashes; // hashes that are searched here
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private Set stopwords; // words that are excluded from the commonSense heuristic
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private char[] order; // order of heuristics
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private ArrayList results; // this is a buffer for plasmaWordIndexEntry + plasmaCrawlLURL.entry - objects
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public plasmaSearchResult(Set searchhashes, Set stopwords, char[] order) {
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this.pageAcc = new TreeMap();
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ref = new kelondroMScoreCluster();
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this.searchhashes = searchhashes;
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this.stopwords = stopwords;
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this.order = order;
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this.results = new ArrayList();
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}
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public plasmaSearchResult cloneSmart() {
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// clones only the top structure
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plasmaSearchResult theClone = new plasmaSearchResult(this.searchhashes, this.stopwords, this.order);
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theClone.pageAcc = (TreeMap) this.pageAcc.clone();
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theClone.ref = this.ref;
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theClone.results = this.results;
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return theClone;
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}
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public int sizeOrdered() {
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return pageAcc.size();
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}
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public int sizeFetched() {
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return results.size();
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}
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public boolean hasMoreElements() {
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return pageAcc.size() > 0;
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}
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public plasmaCrawlLURL.Entry nextElement() {
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Object top = pageAcc.lastKey();
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return (plasmaCrawlLURL.Entry) pageAcc.remove(top);
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}
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protected void addResult(plasmaWordIndexEntry indexEntry, plasmaCrawlLURL.Entry page) {
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// this does 3 things:
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// 1. simply store indexEntry and page to a cache
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// 2. calculate references and store them to cache
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// 2. add reference to reference sorting table
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// take out relevant information for reference computation
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URL url = page.url();
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String descr = page.descr();
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if ((url == null) || (descr == null)) return;
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String[] urlcomps = url.toString().split(splitrex); // word components of the url
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String[] descrcomps = descr.split(splitrex); // words in the description
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// store everything
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Object[] resultVector = new Object[] {indexEntry, page, urlcomps, descrcomps};
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results.add(resultVector);
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// add references
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addScoreFiltered(urlcomps);
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addScoreFiltered(descrcomps);
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}
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protected void sortResults() {
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// finally sort the results
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// create a commonSense - set that represents a set of words that is
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// treated as 'typical' for this search request
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Object[] references = getReferences(16);
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Set commonSense = new HashSet();
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for (int i = 0; i < references.length; i++) commonSense.add((String) references[i]);
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Object[] resultVector;
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plasmaWordIndexEntry indexEntry;
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plasmaCrawlLURL.Entry page;
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String[] urlcomps;
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String[] descrcomps;
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long ranking;
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long inc = 4096 * 4096;
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String queryhash;
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for (int i = 0; i < results.size(); i++) {
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// take out values from result array
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resultVector = (Object[]) results.get(i);
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indexEntry = (plasmaWordIndexEntry) resultVector[0];
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page = (plasmaCrawlLURL.Entry) resultVector[1];
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urlcomps = (String[]) resultVector[2];
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descrcomps = (String[]) resultVector[3];
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// apply pre-calculated order attributes
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ranking = 0;
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if (order[0] == O_QUALITY) ranking = 4096 * indexEntry.getQuality();
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else if (order[0] == O_AGE) ranking = 4096 * indexEntry.getVirtualAge();
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if (order[1] == O_QUALITY) ranking += indexEntry.getQuality();
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else if (order[1] == O_AGE) ranking += indexEntry.getVirtualAge();
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// apply 'common-sense' heuristic using references
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for (int j = 0; j < urlcomps.length; j++) if (commonSense.contains(urlcomps[j])) ranking += inc;
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for (int j = 0; j < descrcomps.length; j++) if (commonSense.contains(descrcomps[j])) ranking += inc;
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// apply query-in-result matching
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Set urlcomph = plasmaSearchQuery.words2hashes(urlcomps);
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Set descrcomph = plasmaSearchQuery.words2hashes(descrcomps);
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Iterator shi = searchhashes.iterator();
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while (shi.hasNext()) {
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queryhash = (String) shi.next();
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if (urlcomph.contains(queryhash)) ranking += 10 * inc;
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if (descrcomph.contains(queryhash)) ranking += 100 * inc;
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}
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// insert value
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//System.out.println("Ranking " + ranking + " for URL " + url.toString());
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pageAcc.put(serverCodings.encodeHex(ranking, 16) + indexEntry.getUrlHash(), page);
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}
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// flush memory
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results = null;
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}
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public Object[] getReferences(int count) {
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// create a list of words that had been computed by statistics over all
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// words that appeared in the url or the description of all urls
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return ref.getScores(count, false, 2, Integer.MAX_VALUE);
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}
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public void addScoreFiltered(String[] words) {
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String word;
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for (int i = 0; i < words.length; i++) {
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word = words[i].toLowerCase();
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if ((word.length() > 2) &&
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(!(stopwords.contains(word))) &&
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("http_html_php_ftp_www_com_org_net_gov_edu_index_home_page_for_usage_the_and_".indexOf(word) < 0) &&
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(!(searchhashes.contains(plasmaWordIndexEntry.word2hash(word)))))
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ref.incScore(word);
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}
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}
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private void printSplitLog(String x, String[] y) {
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String s = "";
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for (int i = 0; i < y.length; i++) s = s + ", " + y[i];
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if (s.length() > 0) s = s.substring(2);
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System.out.println("Split '" + x + "' = {" + s + "}");
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}
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}
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