mirror of
https://github.com/yacy/yacy_search_server.git
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248077d3f0
git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@1 6c8d7289-2bf4-0310-a012-ef5d649a1542
323 lines
12 KiB
Java
323 lines
12 KiB
Java
// plasmaIndexEntry.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, 2004
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// last major change: 01.06.2004
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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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/*
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This class defines the structures of an index entry
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*/
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package de.anomic.plasma;
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import java.net.*;
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import java.util.*;
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import de.anomic.yacy.*;
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import de.anomic.server.*;
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public class plasmaWordIndexEntry {
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// an wordEntry can be filled in either of two ways:
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// by the discrete values of the entry
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// or by the encoded entry-string
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// the size of a word hash
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public static final int wordHashLength = yacySeedDB.commonHashLength; // 12
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// the size of the index entry attributes
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public static final int attrSpaceShort = 12;
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public static final int attrSpaceLong = 18;
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// the associated hash
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private String urlHash;
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// discrete values
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private int count; // words in file
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private int posintext; // first position of the word in text as number of word; 0=unknown or irrelevant position
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private int posinphrase; // position within a phrase of the word
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private 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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private int age; // calculated by using last-modified
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private int quality; // result of a heuristic on the source file
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private String language; // essentially the country code (the TLD as heuristic), two letters lowercase only
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private char doctype; // type of source
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private char localflag; // indicates if the index was created locally
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// some doctypes:
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public static final char DT_PDFPS = 'p';
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public static final char DT_TEXT = 't';
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public static final char DT_HTML = 'h';
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public static final char DT_DOC = 'd';
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public static final char DT_IMAGE = 'i';
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public static final char DT_MOVIE = 'm';
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public static final char DT_FLASH = 'f';
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public static final char DT_SHARE = 's';
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public static final char DT_UNKNOWN = 'u';
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// local flag attributes
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public static final char LT_LOCAL = 'L';
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public static final char LT_GLOBAL = 'G';
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// encoded discrete values
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private String code;
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// create a word hash
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public static String word2hash(String word) {
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return serverCodings.encodeMD5B64(word.toLowerCase(), true).substring(0, wordHashLength);
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}
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// doctype calculation
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public static char docType(String path) {
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char doctype = DT_UNKNOWN;
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if (path.endsWith(".gif")) doctype = DT_IMAGE;
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if (path.endsWith(".jpg")) doctype = DT_IMAGE;
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if (path.endsWith(".jpeg")) doctype = DT_IMAGE;
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if (path.endsWith(".png")) doctype = DT_IMAGE;
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if (path.endsWith(".html")) doctype = DT_HTML;
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if (path.endsWith(".txt")) doctype = DT_TEXT;
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if (path.endsWith(".doc")) doctype = DT_DOC;
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if (path.endsWith(".rtf")) doctype = DT_DOC;
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if (path.endsWith(".pdf")) doctype = DT_PDFPS;
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if (path.endsWith(".ps")) doctype = DT_PDFPS;
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if (path.endsWith(".avi")) doctype = DT_MOVIE;
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if (path.endsWith(".mov")) doctype = DT_MOVIE;
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if (path.endsWith(".qt")) doctype = DT_MOVIE;
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if (path.endsWith(".mpg")) doctype = DT_MOVIE;
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if (path.endsWith(".md5")) doctype = DT_SHARE;
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if (path.endsWith(".mpeg")) doctype = DT_MOVIE;
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if (path.endsWith(".asf")) doctype = DT_FLASH;
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return doctype;
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}
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// language calculation
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public static String language(URL url) {
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String host = url.getHost();
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int pos = host.lastIndexOf(".");
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String language = "uk";
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if ((pos > 0) && (host.length() - pos == 3)) language = host.substring(pos + 1).toLowerCase();
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return language;
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}
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// the class instantiation can only be done by a plasmaStore method
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// therefore they are all public
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public plasmaWordIndexEntry(String urlHash, int count, int posintext, int posinphrase, int posofphraseint, int virtualage, int quality, String language, char doctype, boolean local) {
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// ** hier fehlt noch als Attribut: <Wortposition im Text>, damit 'nearby' getrackt werden kann **
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if ((language == null) || (language.length() != plasmaCrawlLURL.urlLanguageLength)) language = "uk";
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this.urlHash = urlHash;
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this.count = count;
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this.posintext = posintext;
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this.posinphrase = posinphrase;
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this.posofphrase = posofphrase;
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this.age = virtualage;
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this.quality = quality;
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this.language = language;
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this.doctype = doctype;
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this.code = null;
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this.localflag = (local) ? LT_LOCAL : LT_GLOBAL;
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}
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public plasmaWordIndexEntry(String urlHash, String code) {
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// the code is not parsed but used later on
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this.urlHash = urlHash;
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this.count = 0;
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this.posintext = 0;
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this.posinphrase = 0;
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this.posofphrase = 0;
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this.age = 0;
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this.quality = 0;
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this.language = "uk";
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this.doctype = 'u';
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this.code = code;
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this.localflag = LT_LOCAL;
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}
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public plasmaWordIndexEntry(String external) {
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// parse external form
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String[] elts = external.substring(1, external.length() - 1).split(",");
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Properties pr = new Properties();
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int p;
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for (int i = 0; i < elts.length; i++) {
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pr.put(elts[i].substring(0, (p = elts[i].indexOf("="))), elts[i].substring(p + 1));
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}
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// set values
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this.urlHash = pr.getProperty("h", "");
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this.count = (int) serverCodings.enhancedCoder.decodeBase64Long(pr.getProperty("c", "A"));
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this.posintext = (int) serverCodings.enhancedCoder.decodeBase64Long(pr.getProperty("t", "__"));
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this.posinphrase = (int) serverCodings.enhancedCoder.decodeBase64Long(pr.getProperty("r", "__"));
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this.posofphrase = (int) serverCodings.enhancedCoder.decodeBase64Long(pr.getProperty("o", "__"));
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this.age = (int) serverCodings.enhancedCoder.decodeBase64Long(pr.getProperty("a", "A"));
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this.quality = (int) serverCodings.enhancedCoder.decodeBase64Long(pr.getProperty("q", "__"));
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this.language = pr.getProperty("l", "uk");
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this.doctype = pr.getProperty("d", "u").charAt(0);
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this.localflag = pr.getProperty("f", ""+LT_LOCAL).charAt(0);
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// clear code
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this.code = null;
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}
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private String b64save(long x, int l) {
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try {
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return serverCodings.enhancedCoder.encodeBase64Long(x, l);
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} catch (Exception e) {
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// if x does not fit into l
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return "________".substring(0, l);
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}
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}
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public String toEncodedForm(boolean longAttr) {
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if (code == null) {
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String shortAttr =
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b64save(quality, plasmaCrawlLURL.urlQualityLength) +
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b64save(age, 3) +
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b64save(count, 2) +
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language +
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doctype +
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localflag; // 3 + 3 + 2 + 2 + 1 + 1 = 12 bytes
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if (longAttr)
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return
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shortAttr +
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b64save(posintext, 2) +
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b64save(posinphrase, 2) +
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b64save(posofphrase, 2);
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// 12 + 3 + 2 + 2 + 1 + 1 = 12 bytes
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else
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return shortAttr;
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} else {
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return code;
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}
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}
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public String toExternalForm() {
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if (code == null) {
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return "{" +
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"h=" + urlHash +
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",q=" + b64save(quality, plasmaCrawlLURL.urlQualityLength) +
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",a=" + b64save(age, 3) +
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",c=" + b64save(count, 2) +
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",l=" + language +
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",d=" + doctype +
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",f=" + localflag +
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",t=" + b64save(posintext, 2) +
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",r=" + b64save(posinphrase, 2) +
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",o=" + b64save(posofphrase, 2) +
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"}";
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} else {
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return "{" +
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"h=" + urlHash +
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",q=" + code.substring(0, 3) +
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",a=" + code.substring(3, 6) +
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",c=" + code.substring(6, 8) +
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",l=" + code.substring(8, 10) +
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",d=" + code.charAt(10) +
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",f=" + code.charAt(11) +
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((code.length() > 12) ? (
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",t=" + code.substring(12, 14) +
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",r=" + code.substring(14, 16) +
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",o=" + code.substring(16, 18)
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) : "") +
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"}";
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}
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}
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public String getUrlHash() {
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return urlHash;
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}
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public int getQuality() {
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if (code == null) return quality;
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else return (int) serverCodings.enhancedCoder.decodeBase64Long(code.substring(0, 3));
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}
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public int getVirtualAge() {
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if (code == null) return age;
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else return (int) serverCodings.enhancedCoder.decodeBase64Long(code.substring(3, 6));
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}
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public int getCount() {
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if (code == null) return count;
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else return (int) serverCodings.enhancedCoder.decodeBase64Long(code.substring(6, 8));
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}
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public int posintext() {
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if (code == null) return posintext;
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if (code.length() >= 14)
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return (int) serverCodings.enhancedCoder.decodeBase64Long(code.substring(12, 14));
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else
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return 0;
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}
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public int posinphrase() {
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if (code == null) return posinphrase;
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if (code.length() >= 15)
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return (int) serverCodings.enhancedCoder.decodeBase64Long(code.substring(14, 16));
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else
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return 0;
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}
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public int posofphrase() {
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if (code == null) return posofphrase;
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if (code.length() >= 16)
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return (int) serverCodings.enhancedCoder.decodeBase64Long(code.substring(16, 18));
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else
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return 0;
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}
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public String getLanguage() {
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if (code == null) return language;
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else return code.substring(8, 10);
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}
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public char getType() {
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if (code == null) return doctype;
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else return code.charAt(10);
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}
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public boolean isLocal() {
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if (code == null) return localflag == LT_LOCAL;
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else return code.charAt(11) == LT_LOCAL;
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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: " + word2hash(args[0]));
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}
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}
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