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// listManager.java
// -------------------------------------
// part of YACY
//
// (C) 2005, 2006 by Alexander Schier
// (C) 2007 by Bjoern 'Fuchs' Krombholz; fox.box@gmail.com
//
// last change: $LastChangedDate$ by $LastChangedBy$
// $LastChangedRevision$
//
// 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.File;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import java.util.Vector;
import java.util.regex.Pattern;
import net.yacy.kelondro.util.FileUtils;
import net.yacy.repository.Blacklist.BlacklistType;
import net.yacy.repository.BlacklistFile;
import net.yacy.search.Switchboard;
import net.yacy.search.query.SearchEventCache;
// The Naming of the functions is a bit strange...
public class ListManager {
private final static Pattern commaPattern = Pattern.compile(",");
public static Switchboard switchboard = null;
public static File listsPath = null;
/**
* Get ListSet from configuration file and return it as a unified Set.
*
* <b>Meaning of ListSet</b>: There are various "lists" in YaCy which are
* actually disjunct (pairwise unequal) sets which themselves can be seperated
* into different subsets. E.g., there can be more than one blacklist of a type.
* A ListSet is the set of all those "lists" (subsets) of an equal type.
*
* @param setName name of the ListSet
* @return a ListSet from configuration file
*/
public static Set<String> getListSet(final String setName) {
return string2set(switchboard.getConfig(setName, ""));
}
/**
* Removes an element from a ListSet and updates the configuration file
* accordingly. If the element doesn't exist, then nothing will be changed.
*
* @param setName name of the ListSet.
* @param listName name of the element to remove from the ListSet.
*/
public static void removeFromListSet(final String setName, final String listName) {
final Set<String> listSet = getListSet(setName);
if (!listSet.isEmpty()) {
listSet.remove(listName);
switchboard.setConfig(setName, collection2string(listSet));
}
}
/**
* Adds an element to an existing ListSet. If the ListSet doesn't exist yet,
* a new one will be added. If the ListSet already contains an identical element,
* then nothing happens.
*
* The new list will be written to the configuartion file.
*
* @param setName
* @param newListName
*/
public static void updateListSet(final String setName, final String newListName) {
final Set<String> listSet = getListSet(setName);
listSet.add(newListName);
switchboard.setConfig(setName, collection2string(listSet));
}
/**
* @param setName ListSet in which to search for an element.
* @param listName the element to search for.
* @return <code>true</code> if the ListSet "setName" contains an element
* "listName", <code>false</code> otherwise.
*/
public static boolean listSetContains(final String setName, final String listName) {
return getListSet(setName).contains(listName);
}
//================general Lists==================
public static String getListString(final String filename, final boolean withcomments) {
return FileUtils.getListString(new File(listsPath ,filename), withcomments);
}
//================Helper functions for collection conversion==================
/**
* Simple conversion of a Collection of Strings to a comma separated String.
* If the implementing Collection subclass guaranties an order of its elements,
* the substrings of the result will have the same order.
*
* @param col a Collection of Strings.
* @return String with elements from set separated by comma.
*/
public static String collection2string(final Collection<String> col){
final StringBuilder str = new StringBuilder(col.size() * 40);
if (col != null && !col.isEmpty()) {
final Iterator<String> it = col.iterator();
str.append(it.next());
while(it.hasNext()) {
if (str.length() > 0) str.append(',');
str.append(it.next());
}
}
return str.toString();
}
/**
* @see listManager#string2vector(String)
*/
public static ArrayList<String> string2arraylist(final String string){
ArrayList<String> list;
if (string != null && string.length() > 0) {
list = new ArrayList<String>(Arrays.asList(commaPattern.split(string, 0)));
} else {
list = new ArrayList<String>();
}
return list;
}
/**
* Simple conversion of a comma separated list to a unified Set.
*
* @param string list of comma separated Strings
* @return resulting Set or empty Set if string is <code>null</code>
*/
public static Set<String> string2set(final String string){
HashSet<String> set;
if (string != null) {
set = new HashSet<String>(Arrays.asList(commaPattern.split(string, 0)));
} else {
set = new HashSet<String>();
}
return set;
}
/**
* Simple conversion of a comma separated list to a Vector containing
* the order of the substrings.
*
* @param string list of comma separated Strings
* @return resulting Vector or empty Vector if string is <code>null</code>
*/
public static Vector<String> string2vector(final String string){
Vector<String> v;
if (string != null) {
v = new Vector<String>(Arrays.asList(commaPattern.split(string, 0)));
} else {
v = new Vector<String>();
}
return v;
}
//=============Blacklist specific================
/**
* Load or reload all active Blacklists
*/
public static void reloadBlacklists(){
final List<BlacklistFile> blacklistFiles = new ArrayList<BlacklistFile>(BlacklistType.values().length);
for (final BlacklistType supportedBlacklistType : BlacklistType.values()) {
final BlacklistFile blFile = new BlacklistFile(
switchboard.getConfig(
supportedBlacklistType.toString() + ".BlackLists", switchboard.getConfig("BlackLists.DefaultList", "url.default.black")),
supportedBlacklistType);
blacklistFiles.add(blFile);
}
Switchboard.urlBlacklist.loadList(
blacklistFiles.toArray(new BlacklistFile[blacklistFiles.size()]),
"/");
SearchEventCache.cleanupEvents(true);
// switchboard.urlBlacklist.clear();
// if (f != "") switchboard.urlBlacklist.loadLists("black", f, "/");
}
}
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