yacy_search_server/source/de/anomic/data/bookmarksDB.java
allo e6c2f700b1 public Tagview
IMPORTANT: Fix for new(empty) Tags when adding/editing bookmarks.

git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@1651 6c8d7289-2bf4-0310-a012-ef5d649a1542
2006-02-15 14:35:30 +00:00

862 lines
30 KiB
Java

//bookmarksDB.java
//-------------------------------------
//part of YACY
//(C) by Michael Peter Christen; mc@anomic.de
//first published on http://www.anomic.de
//Frankfurt, Germany, 2004
//
//This file ist contributed by Alexander Schier
//
//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
//
//Using this software in any meaning (reading, learning, copying, compiling,
//running) means that you agree that the Author(s) is (are) not responsible
//for cost, loss of data or any harm that may be caused directly or indirectly
//by usage of this softare or this documentation. The usage of this software
//is on your own risk. The installation and usage (starting/running) of this
//software may allow other people or application to access your computer and
//any attached devices and is highly dependent on the configuration of the
//software which must be done by the user of the software; the author(s) is
//(are) also not responsible for proper configuration and usage of the
//software, even if provoked by documentation provided together with
//the software.
//
//Any changes to this file according to the GPL as documented in the file
//gpl.txt aside this file in the shipment you received can be done to the
//lines that follows this copyright notice here, but changes must not be
//done inside the copyright notive above. A re-distribution must contain
//the intact and unchanged copyright notice.
//Contributions and changes to the program code must be marked as such.
package de.anomic.data;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Comparator;
import java.util.Date;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Map;
import java.util.TreeSet;
import java.util.Vector;
import javax.xml.parsers.FactoryConfigurationError;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
import de.anomic.kelondro.kelondroDyn;
import de.anomic.kelondro.kelondroException;
import de.anomic.kelondro.kelondroMap;
import de.anomic.plasma.plasmaURL;
import de.anomic.plasma.plasmaWordIndexEntry;
import de.anomic.server.logging.serverLog;
public class bookmarksDB {
kelondroMap tagsTable;
kelondroMap bookmarksTable;
kelondroMap datesTable;
public static String tagHash(String tagName){
return plasmaWordIndexEntry.word2hash(tagName.toLowerCase());
}
public static String dateToiso8601(Date date){
return new SimpleDateFormat("yyyy-MM-dd").format(date)+"T"+(new SimpleDateFormat("HH:mm:ss")).format(date)+"Z";
}
public static Date iso8601ToDate(String iso8601){
String[] tmp=iso8601.split("T");
String day=tmp[0];
String time=tmp[1];
if(time.length()>8){
time=time.substring(0,8);
}
try {
Calendar date=Calendar.getInstance();
Calendar date2=Calendar.getInstance();
date.setTime(new SimpleDateFormat("yyyy-MM-dd").parse(day));
date2.setTime(new SimpleDateFormat("HH:mm:ss").parse(time));
date.set(Calendar.HOUR_OF_DAY, date2.get(Calendar.HOUR_OF_DAY));
date.set(Calendar.MINUTE, date2.get(Calendar.MINUTE));
date.set(Calendar.SECOND, date2.get(Calendar.SECOND));
return date.getTime();
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return new Date();
}
public bookmarksDB(File bookmarksFile, File tagsFile, File datesFile, int bufferkb){
//bookmarks
//check if database exists
if(bookmarksFile.exists()){
try {
//open it
this.bookmarksTable=new kelondroMap(new kelondroDyn(bookmarksFile, 1024*bufferkb, '_'));
} catch (IOException e) {
//database reset :-((
bookmarksFile.delete();
bookmarksFile.getParentFile().mkdirs();
//urlHash is 12 bytes long
this.bookmarksTable = new kelondroMap(new kelondroDyn(bookmarksFile, bufferkb * 1024, 12, 256, '_', true));
}
}else{
//new database
bookmarksFile.getParentFile().mkdirs();
this.bookmarksTable = new kelondroMap(new kelondroDyn(bookmarksFile, bufferkb * 1024, 12, 256, '_', true));
}
//tags
//check if database exists
if(tagsFile.exists()){
try {
//open it
this.tagsTable=new kelondroMap(new kelondroDyn(tagsFile, 1024*bufferkb, '_'));
} catch (IOException e) {
//reset database
tagsFile.delete();
tagsFile.getParentFile().mkdirs();
// max. 128 byte long tags
this.tagsTable = new kelondroMap(new kelondroDyn(tagsFile, bufferkb * 1024, 12, 256, '_', true));
rebuildTags();
}
}else{
//new database
tagsFile.getParentFile().mkdirs();
this.tagsTable = new kelondroMap(new kelondroDyn(tagsFile, bufferkb * 1024, 12, 256, '_', true));
rebuildTags();
}
// dates
//check if database exists
if(datesFile.exists()){
try {
//open it
this.datesTable=new kelondroMap(new kelondroDyn(datesFile, 1024*bufferkb, '_'));
} catch (IOException e) {
//reset database
datesFile.delete();
datesFile.getParentFile().mkdirs();
//YYYY-MM-DDTHH:mm:ssZ = 20 byte. currently used: YYYY-MM-DD = 10 bytes
this.datesTable = new kelondroMap(new kelondroDyn(datesFile, bufferkb * 1024, 20, 256, '_', true));
rebuildDates();
}
}else{
//new database
datesFile.getParentFile().mkdirs();
this.datesTable = new kelondroMap(new kelondroDyn(datesFile, bufferkb * 1024, 20, 256, '_', true));
rebuildDates();
}
}
public void close(){
try {
bookmarksTable.close();
} catch (IOException e) {}
try {
tagsTable.close();
} catch (IOException e) {}
try {
datesTable.close();
} catch (IOException e) {}
}
public int bookmarksSize(){
return bookmarksTable.size();
}
public int tagsSize(){
return tagsTable.size();
}
/**
* Store a Bookmark in the Bookmarkstable
* @param bookmark the bookmark to store/update in the bookmarksTable
*/
public void setBookmarksTable(Bookmark bookmark){
try {
bookmarksDB.this.bookmarksTable.set(bookmark.getUrlHash(), bookmark.mem);
} catch (IOException e) {}
}
/**
* store a Tag in the tagsDB or remove an empty tag
* @param tag the tagobject to be stored/removed
*/
public void setTagsTable(Tag tag){
try {
if(tag.size() >0){
bookmarksDB.this.tagsTable.set(tag.getTagHash(), tag.mem);
}else{
bookmarksDB.this.tagsTable.remove(tag.getTagHash());
}
} catch (IOException e) {}
}
public String addTag(Tag tag){
try {
tagsTable.set(tag.getTagName(), tag.mem);
return tag.getTagName();
} catch (IOException e) {
return null;
}
}
public void rebuildTags(){
serverLog.logInfo("BOOKMARKS", "rebuilding tags.db from bookmarks.db...");
Iterator it=bookmarkIterator(true);
Bookmark bookmark;
Tag tag;
String[] tags;
while(it.hasNext()){
bookmark=(Bookmark) it.next();
tags = bookmark.getTags().split(",");
tag=null;
for(int i=0;i<tags.length;i++){
tag=getTag(tagHash(tags[i]));
if(tag==null){
tag=new Tag(tags[i]);
}
tag.add(bookmark.getUrlHash());
setTagsTable(tag);
}
}
serverLog.logInfo("BOOKMARKS", "Rebuilt "+tagsTable.size()+" tags using your "+bookmarksTable.size()+" bookmarks.");
}
public void rebuildDates(){
serverLog.logInfo("BOOKMARKS", "rebuilding dates.db from bookmarks.db...");
Iterator it=bookmarkIterator(true);
Bookmark bookmark;
String date;
bookmarksDate bmDate;
while(it.hasNext()){
bookmark=(Bookmark) it.next();
date = (new SimpleDateFormat("yyyy-MM-dd")).format(new Date(bookmark.getTimeStamp()));
bmDate=getDate(date);
if(bmDate==null){
bmDate=new bookmarksDate(date);
}
bmDate.add(bookmark.getUrlHash());
bmDate.setDatesTable();
}
serverLog.logInfo("BOOKMARKS", "Rebuilt "+datesTable.size()+" dates using your "+bookmarksTable.size()+" bookmarks.");
}
public Tag getTag(String hash){
Map map;
try {
map = tagsTable.get(hash);
if(map==null) return null;
return new Tag(hash, map);
} catch (IOException e) {
return null;
}
}
public bookmarksDate getDate(String date){
Map map;
try {
map=datesTable.get(date);
if(map==null) return new bookmarksDate(date);
return new bookmarksDate(date, map);
} catch (IOException e) {
return null;
}
}
public boolean renameTag(String oldName, String newName){
String tagHash=tagHash(oldName);
Tag tag=getTag(tagHash);
if (tag != null) {
Vector urlHashes = tag.getUrlHashes();
try {
tagsTable.remove(tagHash(oldName));
} catch (IOException e) {
}
tag=new Tag(tagHash(newName), tag.mem);
tag.tagHash = tagHash(newName);
setTagsTable(tag);
Iterator it = urlHashes.iterator();
Bookmark bookmark;
Vector tags;
while (it.hasNext()) {
bookmark = getBookmark((String) it.next());
tags = listManager.string2vector(bookmark.getTags());
tags.remove(oldName); //this will fail, if upper/lowercase is not matching
tags.add(newName);
bookmark.setTags(tags, true);
setBookmarksTable(bookmark);
}
return true;
}
return false;
}
public void removeTag(String tagName){
try {
tagsTable.remove(tagName);
} catch (IOException e) {}
}
public String addBookmark(Bookmark bookmark){
try {
bookmarksTable.set(bookmark.getUrlHash(), bookmark.mem);
return bookmark.getUrlHash();
} catch (IOException e) {
return null;
}
}
public Bookmark getBookmark(String urlHash){
Map map;
try {
map = bookmarksTable.get(urlHash);
if(map==null) return null;
return new Bookmark(urlHash, map);
} catch (IOException e) {
return null;
}
}
public Iterator getBookmarksIterator(boolean priv){
TreeSet set=new TreeSet(new bookmarkComparator());
Iterator it=bookmarkIterator(true);
Bookmark bm;
while(it.hasNext()){
bm=(Bookmark)it.next();
if(priv || bm.getPublic()){
set.add(bm.getUrlHash());
}
}
return set.iterator();
}
public Iterator getBookmarksIterator(String tagName, boolean priv){
TreeSet set=new TreeSet(new bookmarkComparator());
String tagHash=tagHash(tagName);
Tag tag=getTag(tagHash);
Vector hashes=new Vector();
if(tag != null){
hashes=getTag(tagHash).getUrlHashes();
}
if(priv){
set.addAll(hashes);
}else{
Iterator it=hashes.iterator();
Bookmark bm;
while(it.hasNext()){
bm=getBookmark((String) it.next());
if(bm.getPublic()){
set.add(bm.getUrlHash());
}
}
}
return set.iterator();
}
public Iterator getTagIterator(boolean priv){
TreeSet set=new TreeSet(new tagComparator());
Iterator it=tagIterator(true);
Tag tag;
while(it.hasNext()){
tag=(Tag) it.next();
if(!priv ||tag.hasPublicItems()){
set.add(tag);
}
}
return set.iterator();
}
public boolean removeBookmark(String urlHash){
Bookmark bookmark = getBookmark(urlHash);
if(bookmark == null) return false; //does not exist
String[] tags = bookmark.getTags().split(",");
bookmarksDB.Tag tag=null;
for(int i=0;i<tags.length;i++){
tag=getTag(tagHash(tags[i]));
if(tag !=null){
tag.delete(urlHash);
setTagsTable(tag);
}
}
try {
bookmarksTable.remove(urlHash);
return true;
} catch (IOException e) {
return false;
}
}
public Bookmark createBookmark(String url){
return new Bookmark(url);
}
public Iterator tagIterator(boolean up){
try {
return new tagIterator(up);
} catch (IOException e) {
return new HashSet().iterator();
}
}
public Iterator bookmarkIterator(boolean up){
try {
return new bookmarkIterator(up);
} catch (IOException e) {
return new HashSet().iterator();
}
}
public void addBookmark(String url, String title, Vector tags){
}
public void importFromXML(String input, boolean isPublic){
SAXParser parser;
try {
ByteArrayInputStream is=new ByteArrayInputStream(input.getBytes());
parser = SAXParserFactory.newInstance().newSAXParser();
xmlImportHandler handler=new xmlImportHandler(isPublic);
parser.parse(is, handler);
} catch (ParserConfigurationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SAXException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (FactoryConfigurationError e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public class xmlImportHandler extends DefaultHandler{
boolean importPublic;
public xmlImportHandler(boolean isPublic){
importPublic=isPublic;
}
public void startElement(String uri, String localName, String qName, Attributes attributes) {
if (qName.equals("post")) {
String url=attributes.getValue("href");
if(url.equals("")){
return;
}
Bookmark bm = new Bookmark(url);
String tagsString=attributes.getValue("tag").replace(' ', ',');
String title=attributes.getValue("description");
String description=attributes.getValue("extended");
String time=attributes.getValue("time");
Vector tags=new Vector();
if(title != null){
bm.setProperty(Bookmark.BOOKMARK_TITLE, title);
}
if(tagsString!=null){
tags = listManager.string2vector(tagsString);
}
bm.setTags(tags, true);
if(time != null){
bm.setTimeStamp(iso8601ToDate(time).getTime());
}
if(description!=null){
bm.setProperty(Bookmark.BOOKMARK_DESCRIPTION, description);
}
bm.setPublic(importPublic);
setBookmarksTable(bm);
}
}
}
/**
* Subclass, which stores an Tag
*
*/
public class Tag{
public static final String URL_HASHES="urlHashes";
public static final String TAG_NAME="tagName";
private String tagHash;
private Map mem;
public Tag(String hash, Map map){
tagHash=hash;
mem=map;
}
public Tag(String name, Vector entries){
tagHash=tagHash(name);
mem=new HashMap();
mem.put(URL_HASHES, listManager.vector2string(entries));
mem.put(TAG_NAME, name);
}
public Tag(String name){
tagHash=tagHash(name);
mem=new HashMap();
mem.put(URL_HASHES, "");
mem.put(TAG_NAME, name);
}
/**
* get the lowercase Tagname
*/
public String getTagName(){
/*if(this.mem.containsKey(TAG_NAME)){
return (String) this.mem.get(TAG_NAME);
}
return "";*/
return getFriendlyName().toLowerCase();
}
public String getTagHash(){
return tagHash;
}
/**
* get tag name, with all uppercase chars.
* @return
*/
public String getFriendlyName(){
/*if(this.mem.containsKey(TAG_FRIENDLY_NAME)){
return (String) this.mem.get(TAG_FRIENDLY_NAME);
}
return getTagName();*/
if(this.mem.containsKey(TAG_NAME)){
return (String) this.mem.get(TAG_NAME);
}
return "notagname";
}
public Vector getUrlHashes(){
return listManager.string2vector((String)this.mem.get(URL_HASHES));
}
public boolean hasPublicItems(){
Iterator it=getBookmarksIterator(this.getTagName(), false);
if(it.hasNext()){
return true;
}
return false;
}
public void add(String urlHash){
String urlHashes = (String)mem.get(URL_HASHES);
Vector list;
if(urlHashes != null && !urlHashes.equals("")){
list=listManager.string2vector(urlHashes);
}else{
list=new Vector();
}
if(!list.contains(urlHash) && !urlHash.equals("")){
list.add(urlHash);
}
this.mem.put(URL_HASHES, listManager.vector2string(list));
/*if(urlHashes!=null && !urlHashes.equals("") ){
if(urlHashes.indexOf(urlHash) <0){
this.mem.put(URL_HASHES, urlHashes+","+urlHash);
}
}else{
this.mem.put(URL_HASHES, urlHash);
}*/
}
public void delete(String urlHash){
Vector list=listManager.string2vector((String) this.mem.get(URL_HASHES));
if(list.contains(urlHash)){
list.remove(urlHash);
}
this.mem.put(URL_HASHES, listManager.vector2string(list));
}
public int size(){
return listManager.string2vector(((String)this.mem.get(URL_HASHES))).size();
}
}
public class bookmarksDate{
public static final String URL_HASHES="urlHashes";
private Map mem;
String date;
public bookmarksDate(String mydate){
date=mydate;
mem=new HashMap();
mem.put(URL_HASHES, "");
}
public bookmarksDate(String mydate, Map map){
date=mydate;
mem=map;
}
public bookmarksDate(String mydate, Vector entries){
date=mydate;
mem=new HashMap();
mem.put(URL_HASHES, listManager.vector2string(entries));
}
public void add(String urlHash){
String urlHashes = (String)mem.get(URL_HASHES);
Vector list;
if(urlHashes != null && !urlHashes.equals("")){
list=listManager.string2vector(urlHashes);
}else{
list=new Vector();
}
if(!list.contains(urlHash) && !urlHash.equals("")){
list.add(urlHash);
}
this.mem.put(URL_HASHES, listManager.vector2string(list));
/*if(urlHashes!=null && !urlHashes.equals("") ){
if(urlHashes.indexOf(urlHash) <0){
this.mem.put(URL_HASHES, urlHashes+","+urlHash);
}
}else{
this.mem.put(URL_HASHES, urlHash);
}*/
}
public void delete(String urlHash){
Vector list=listManager.string2vector((String) this.mem.get(URL_HASHES));
if(list.contains(urlHash)){
list.remove(urlHash);
}
this.mem.put(URL_HASHES, listManager.vector2string(list));
}
public void setDatesTable(){
try {
if(this.size() >0){
bookmarksDB.this.datesTable.set(getDateString(), mem);
}else{
bookmarksDB.this.datesTable.remove(getDateString());
}
} catch (IOException e) {}
}
public String getDateString(){
return date;
}
public int size(){
return listManager.string2vector(((String)this.mem.get(URL_HASHES))).size();
}
}
/**
* Subclass, which stores the bookmark
*
*/
public class Bookmark{
public static final String BOOKMARK_URL="bookmarkUrl";
public static final String BOOKMARK_TITLE="bookmarkTitle";
public static final String BOOKMARK_DESCRIPTION="bookmarkDesc";
public static final String BOOKMARK_TAGS="bookmarkTags";
public static final String BOOKMARK_PUBLIC="bookmarkPublic";
public static final String BOOKMARK_TIMESTAMP="bookmarkTimestamp";
private String urlHash;
private Map mem;
public Bookmark(String urlHash, Map map){
this.urlHash=urlHash;
this.mem=map;
}
public Bookmark(String url){
if(!url.toLowerCase().startsWith("http://")){
url="http://"+url;
}
this.urlHash=plasmaURL.urlHash(url);
mem=new HashMap();
mem.put(BOOKMARK_URL, url);
try {
Map oldmap= bookmarksTable.get(this.urlHash);
if(oldmap != null && oldmap.containsKey(BOOKMARK_TIMESTAMP)){
mem.put(BOOKMARK_TIMESTAMP, oldmap.get(BOOKMARK_TIMESTAMP)); //preserve timestamp on edit
}else{
mem.put(BOOKMARK_TIMESTAMP, String.valueOf(System.currentTimeMillis()));
}
bookmarksDate bmDate=getDate((String) mem.get(BOOKMARK_TIMESTAMP));
bmDate.add(this.urlHash);
bmDate.setDatesTable();
removeBookmark(this.urlHash); //prevent empty tags
} catch (IOException e) {
//entry not yet present (normal case)
mem.put(BOOKMARK_TIMESTAMP, String.valueOf(System.currentTimeMillis()));
}
}
public Bookmark(String urlHash, URL url){
this.urlHash=urlHash;
mem=new HashMap();
mem.put(BOOKMARK_URL, url.toString());
}
public Bookmark(String urlHash, String url){
this.urlHash=urlHash;
mem=new HashMap();
mem.put(BOOKMARK_URL, url);
}
public String getUrlHash(){
return urlHash;
}
public String getUrl(){
return (String) this.mem.get(BOOKMARK_URL);
}
public String getTags(){
if(this.mem.containsKey(BOOKMARK_TAGS)){
return (String)this.mem.get(BOOKMARK_TAGS);
}
return "";
}
public Vector getTagsVector(){
return listManager.string2vector(this.getTags());
}
public String getDescription(){
if(this.mem.containsKey(BOOKMARK_DESCRIPTION)){
return (String) this.mem.get(BOOKMARK_DESCRIPTION);
}
return "";
}
public String getTitle(){
if(this.mem.containsKey(BOOKMARK_TITLE)){
return (String) this.mem.get(BOOKMARK_TITLE);
}
return (String) this.mem.get(BOOKMARK_URL);
}
public boolean getPublic(){
if(this.mem.containsKey(BOOKMARK_PUBLIC)){
return ((String) this.mem.get(BOOKMARK_PUBLIC)).equals("public");
}else{
return false;
}
}
public void setPublic(boolean isPublic){
if(isPublic){
this.mem.put(BOOKMARK_PUBLIC, "public");
}else{
this.mem.put(BOOKMARK_PUBLIC, "private");
}
}
public void setProperty(String name, String value){
mem.put(name, value);
//setBookmarksTable();
}
public void addTag(String tag){
Vector tags;
if(!mem.containsKey(BOOKMARK_TAGS)){
tags=new Vector();
}else{
tags=(Vector)mem.get(BOOKMARK_TAGS);
}
tags.add(tag);
this.setTags(tags, true);
}
public void setTags(Vector tags){
setTags(tags, true);
}
/**
* set the Tags of the bookmark
* @param tags Vector with the tagnames
* @param local sets, whether the updated tags should be stored to tagsDB
*/
public void setTags(Vector tags, boolean local){
mem.put(BOOKMARK_TAGS, listManager.vector2string(tags));
Iterator it=tags.iterator();
while(it.hasNext()){
String tagName=(String) it.next();
Tag tag=getTag(tagHash(tagName));
if(tag == null){
tag=new Tag(tagName);
}
tag.add(getUrlHash());
if(local){
setTagsTable(tag);
}
}
}
public void setBookmarksTable(){
try {
bookmarksDB.this.bookmarksTable.set(urlHash, mem);
} catch (IOException e) {}
}
public long getTimeStamp(){
if(mem.containsKey(BOOKMARK_TIMESTAMP)){
return Long.parseLong((String)mem.get(BOOKMARK_TIMESTAMP));
}else{
return 0;
}
}
public void setTimeStamp(long timestamp){
this.mem.put(BOOKMARK_TIMESTAMP, String.valueOf(timestamp));
}
}
public class tagIterator implements Iterator{
kelondroDyn.dynKeyIterator tagIter;
bookmarksDB.Tag nextEntry;
public tagIterator(boolean up) throws IOException {
this.tagIter = bookmarksDB.this.tagsTable.keys(up, false);
this.nextEntry = null;
}
public boolean hasNext() {
try {
return this.tagIter.hasNext();
} catch (kelondroException e) {
//resetDatabase();
return false;
}
}
public Object next() {
try {
return getTag((String) this.tagIter.next());
} catch (kelondroException e) {
//resetDatabase();
return null;
}
}
public void remove() {
if (this.nextEntry != null) {
try {
Object tagName = this.nextEntry.getTagName();
if (tagName != null) removeTag((String) tagName);
} catch (kelondroException e) {
//resetDatabase();
}
}
}
}
public class bookmarkIterator implements Iterator{
kelondroDyn.dynKeyIterator bookmarkIter;
bookmarksDB.Bookmark nextEntry;
public bookmarkIterator(boolean up) throws IOException {
this.bookmarkIter = bookmarksDB.this.bookmarksTable.keys(up, false);
this.nextEntry = null;
}
public boolean hasNext() {
try {
return this.bookmarkIter.hasNext();
} catch (kelondroException e) {
//resetDatabase();
return false;
}
}
public Object next() {
try {
return getBookmark((String) this.bookmarkIter.next());
} catch (kelondroException e) {
//resetDatabase();
return null;
}
}
public void remove() {
if (this.nextEntry != null) {
try {
Object bookmarkName = this.nextEntry.getUrlHash();
if (bookmarkName != null) removeBookmark((String) bookmarkName);
} catch (kelondroException e) {
//resetDatabase();
}
}
}
}
/**
* Comparator to sort the Bookmarks with Timestamps
*/
public class bookmarkComparator implements Comparator{
public int compare(Object obj1, Object obj2){
Bookmark bm1=getBookmark((String)obj1);
Bookmark bm2=getBookmark((String)obj2);
//TODO: what happens, if there is a big difference? (to much for int)
return (new Long(bm1.getTimeStamp() - bm2.getTimeStamp())).intValue();
}
}
/**
* sorts the tag for name
*/
public class tagComparator implements Comparator{
public int compare(Object obj1, Object obj2){
return ((Tag)obj1).getTagName().compareTo(((Tag)obj2).getTagName());
}
}
}