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