// LibraryProvider.java
// (C) 2009 by Michael Peter Christen; mc@yacy.net, Frankfurt a. M., Germany
// first published 01.10.2009 on http://yacy.net
//
// This is a part of YaCy
//
// $LastChangedDate$
// $LastChangedRevision$
// $LastChangedBy$
//
// LICENSE
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
package de.anomic.data;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.TreeSet;
public class LibraryProvider {
private static final String path_to_source_dictionaries = "source";
private static final String path_to_did_you_mean_dictionaries = "didyoumean";
public static DidYouMeanLibrary dymLib = new DidYouMeanLibrary(null);
public static OpenGeoDB geoDB = new OpenGeoDB(null);
public static File dictSource = null;
public static File dictRoot = null;
/**
* initialize the LibraryProvider as static class.
* This assigns default paths, and initializes the dictionary classes
* Additionally, if default dictionaries are given in the source path,
* they are translated into the input format inside the DATA/DICTIONARIES directory
*
* @param pathToSource
* @param pathToDICTIONARIES
*/
public static void initialize(File rootPath) {
dictSource = new File(rootPath, path_to_source_dictionaries);
if (!dictSource.exists()) dictSource.mkdirs();
dictRoot = rootPath;
// initialize libraries
integrateDeReWo();
initDidYouMean();
integrateOpenGeoDB();
}
public static void integrateOpenGeoDB() {
File ogdb = new File(dictSource, "opengeodb-0.2.5a-UTF8-sql.gz");
if (ogdb.exists()) {
geoDB = new OpenGeoDB(ogdb);
return;
}
ogdb = new File(dictSource, "opengeodb-02513_2007-10-02.sql.gz");
if (ogdb.exists()) {
geoDB = new OpenGeoDB(ogdb);
return;
}
ogdb = new File(dictSource, "opengeodb-02513_2007-10-02.sql");
if (ogdb.exists()) {
geoDB = new OpenGeoDB(ogdb);
return;
}
}
public static void initDidYouMean() {
File dymDict = new File(dictRoot, path_to_did_you_mean_dictionaries);
if (!dymDict.exists()) dymDict.mkdirs();
dymLib = new DidYouMeanLibrary(dymDict);
}
public static void integrateDeReWo() {
// translate input files (once..)
File dymDict = new File(dictRoot, path_to_did_you_mean_dictionaries);
if (!dymDict.exists()) dymDict.mkdirs();
File pathToSource = new File(dictRoot, path_to_source_dictionaries);
File derewoInput = new File(pathToSource, "derewo-v-30000g-2007-12-31-0.1.txt");
File derewoOutput = new File(dymDict, "derewo-v-30000g-2007-12-31-0.1.words");
if (!derewoOutput.exists() && derewoInput.exists()) {
// create the translation of the derewo file (which is easy in this case)
ArrayList<String> derewo = loadDeReWo(derewoInput, true);
try {
writeWords(derewoOutput, derewo);
} catch (IOException e) {
e.printStackTrace();
}
}
}
/*
private static ArrayList<String> loadList(final File file, String comment, boolean toLowerCase) {
final ArrayList<String> list = new ArrayList<String>();
if (!file.exists()) return list;
BufferedReader reader = null;
try {
reader = new BufferedReader(new InputStreamReader(new FileInputStream(file)));
String line;
while ((line = reader.readLine()) != null) {
line = line.trim();
if ((line.length() > 0) && (!(line.startsWith(comment)))) {
list.add((toLowerCase) ? line.trim().toLowerCase() : line.trim());
}
}
reader.close();
} catch (final IOException e) {
e.printStackTrace();
} finally {
if (reader != null) try { reader.close(); } catch (final Exception e) {}
}
return list;
}
*/
private static Set<String> sortUnique(List<String> list) {
TreeSet<String> s = new TreeSet<String>();
for (String t: list) s.add(t);
return s;
}
private static void writeWords(File f, ArrayList<String> list) throws IOException {
Set<String> s = sortUnique(list);
PrintWriter w = new PrintWriter(new BufferedWriter(new FileWriter(f)));
for (String t: s) w.println(t);
w.close();
}
private static ArrayList<String> loadDeReWo(final File file, boolean toLowerCase) {
final ArrayList<String> list = new ArrayList<String>();
BufferedReader reader = null;
try {
reader = new BufferedReader(new InputStreamReader(new FileInputStream(file), "UTF-8"));
String line;
// read until text starts
while ((line = reader.readLine()) != null) {
if (line.startsWith("-----")) break;
}
// read empty line
line = reader.readLine();
// read lines
int p;
int c;
while ((line = reader.readLine()) != null) {
line = line.trim();
p = line.indexOf("\t");
if (p > 0) {
c = Integer.parseInt(line.substring(p + 1));
if (c < 1) continue;
list.add((toLowerCase) ? line.substring(0, p).trim().toLowerCase() : line.substring(0, p).trim());
}
}
reader.close();
} catch (final IOException e) {
e.printStackTrace();
} finally {
if (reader != null) try { reader.close(); } catch (final Exception e) {}
}
return list;
}
public static void main(String[] args) {
File here = new File("dummy").getParentFile();
initialize(new File(here, "DATA/DICTIONARIES"));
System.out.println("dymDict-size = " + dymLib.size());
Set<String> r = dymLib.recommend("da");
for (String s: r) {
System.out.println("$ " + s);
}
System.out.println("recommendations: " + r.size());
}
}