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294 lines
11 KiB
294 lines
11 KiB
// YMarkXBELImporter.java
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// (C) 2011 by Stefan Foerster, sof@gmx.de, Norderstedt, Germany
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// first published 2010 on http://yacy.net
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//
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// This is a part of YaCy, a peer-to-peer based web search engine
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//
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// $LastChangedDate$
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// $LastChangedRevision$
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// $LastChangedBy$
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//
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// LICENSE
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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.ymark;
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import java.text.ParseException;
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import java.util.HashMap;
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import java.util.HashSet;
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import net.yacy.cora.util.ConcurrentLog;
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import org.xml.sax.Attributes;
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import org.xml.sax.InputSource;
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import org.xml.sax.SAXException;
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import org.xml.sax.XMLReader;
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import org.xml.sax.helpers.DefaultHandler;
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import org.xml.sax.helpers.XMLReaderFactory;
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public class YMarkXBELImporter extends YMarkImporter {
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// Statics
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public static String IMPORTER = "XBEL";
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public static enum XBEL {
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NOTHING (""),
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XBEL ("<xbel"),
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TITLE ("<title"),
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DESC ("<desc"),
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BOOKMARK ("<bookmark"),
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FOLDER ("<folder"),
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SEPARATOR ("<separator"),
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ALIAS ("<alias"),
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INFO ("<info"),
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METADATA ("<metadata");
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private static StringBuilder buffer = new StringBuilder(25);
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private String tag;
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private XBEL(String t) {
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this.tag = t;
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}
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public String tag() {
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return this.toString().toLowerCase();
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}
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public String endTag(boolean empty) {
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buffer.setLength(0);
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buffer.append(tag);
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if(empty) {
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buffer.append('/');
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} else {
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buffer.insert(1, '/');
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}
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buffer.append('>');
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return buffer.toString();
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}
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public String startTag(boolean att) {
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buffer.setLength(0);
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buffer.append(tag);
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if(!att)
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buffer.append('>');
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return buffer.toString();
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}
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}
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// Importer Variables
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private final XMLReader xmlReader;
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public YMarkXBELImporter (final MonitoredReader bmk_file, final int queueSize, final String targetFolder, final String sourceFolder) throws SAXException {
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super(bmk_file, queueSize, targetFolder, sourceFolder);
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setImporter(IMPORTER);
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this.xmlReader = XMLReaderFactory.createXMLReader();
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this.xmlReader.setFeature(XML_NAMESPACE_PREFIXES, false);
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this.xmlReader.setFeature(XML_NAMESPACES, false);
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this.xmlReader.setFeature(XML_VALIDATION, false);
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this.xmlReader.setContentHandler(new XBELParser());
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}
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public YMarkXBELImporter (final MonitoredReader bmk_file, final int queueSize, final String targetFolder) throws SAXException {
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this(bmk_file, queueSize, "", targetFolder);
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}
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public void parse() throws Exception {
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xmlReader.parse(new InputSource(bmk_file));
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}
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public class XBELParser extends DefaultHandler {
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// Parser Variables
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private final StringBuilder folderstring;
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private final HashMap<String,YMarkEntry> bmkRef;
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private final HashSet<YMarkEntry> aliasRef;
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private final StringBuilder buffer;
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private final StringBuilder folder;
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private YMarkEntry bmk;
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private YMarkEntry ref;
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private XBEL outer_state; // BOOKMARK, FOLDER, NOTHING
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private XBEL inner_state; // DESC, TITLE, INFO, ALIAS, (METADATA), NOTHING
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private boolean parse_value;
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public XBELParser() {
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this.folderstring = new StringBuilder(YMarkTables.BUFFER_LENGTH);
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this.folderstring.append(targetFolder);
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this.bmk = new YMarkEntry();
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this.bmkRef = new HashMap<String,YMarkEntry>();
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this.aliasRef = new HashSet<YMarkEntry>();
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this.buffer = new StringBuilder();
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this.folder = new StringBuilder(YMarkTables.BUFFER_LENGTH);
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this.folder.append(targetFolder);
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}
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public void endDocument() throws SAXException {
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// put alias references in the bookmark queue to ensure that folders get updated
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// we do that at endDocument to ensure all referenced bookmarks already exist
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bookmarks.addAll(this.aliasRef);
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this.aliasRef.clear();
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this.bmkRef.clear();
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}
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public void startElement(final String uri, final String name, String tag, final Attributes atts) throws SAXException {
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YMarkDate date = new YMarkDate();
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if (tag == null) return;
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tag = tag.toLowerCase();
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if (XBEL.BOOKMARK.tag().equals(tag)) {
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this.bmk = new YMarkEntry();
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this.bmk.put(YMarkEntry.BOOKMARK.URL.key(), atts.getValue(uri, YMarkEntry.BOOKMARK.URL.xbel_attrb()));
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//TODO: include a dynamic loop over all annotation tags
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this.bmk.put(YMarkEntry.BOOKMARK.TAGS.key(), atts.getValue(uri, YMarkEntry.BOOKMARK.TAGS.xbel_attrb()));
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this.bmk.put(YMarkEntry.BOOKMARK.PUBLIC.key(), atts.getValue(uri, YMarkEntry.BOOKMARK.PUBLIC.xbel_attrb()));
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this.bmk.put(YMarkEntry.BOOKMARK.VISITS.key(), atts.getValue(uri, YMarkEntry.BOOKMARK.VISITS.xbel_attrb()));
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try {
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date.parseISO8601(atts.getValue(uri, YMarkEntry.BOOKMARK.DATE_ADDED.xbel_attrb()));
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} catch (final ParseException e) {
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// TODO: exception handling
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}
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this.bmk.put(YMarkEntry.BOOKMARK.DATE_ADDED.key(), date.toString());
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try {
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date.parseISO8601(atts.getValue(uri, YMarkEntry.BOOKMARK.DATE_VISITED.xbel_attrb()));
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} catch (final ParseException e) {
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// TODO: exception handling
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}
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this.bmk.put(YMarkEntry.BOOKMARK.DATE_VISITED.key(), date.toString());
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try {
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date.parseISO8601(atts.getValue(uri, YMarkEntry.BOOKMARK.DATE_MODIFIED.xbel_attrb()));
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} catch (final ParseException e) {
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// TODO: exception handling
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}
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this.bmk.put(YMarkEntry.BOOKMARK.DATE_MODIFIED.key(), date.toString());
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UpdateBmkRef(atts.getValue(uri, YMarkEntry.BOOKMARKS_ID), true);
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this.outer_state = XBEL.BOOKMARK;
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this.inner_state = XBEL.NOTHING;
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this.parse_value = false;
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} else if(XBEL.FOLDER.tag().equals(tag)) {
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this.outer_state = XBEL.FOLDER;
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this.inner_state = XBEL.NOTHING;
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} else if (XBEL.DESC.tag().equals(tag)) {
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this.inner_state = XBEL.DESC;
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this.parse_value = true;
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} else if (XBEL.TITLE.tag().equals(tag)) {
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this.inner_state = XBEL.TITLE;
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this.parse_value = true;
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} else if (XBEL.INFO.tag().equals(tag)) {
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this.inner_state = XBEL.INFO;
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this.parse_value = false;
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} else if (XBEL.METADATA.tag().equals(tag)) {
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// Support for old YaCy BookmarksDB XBEL Metadata (non valid XBEL)
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if(this.outer_state == XBEL.BOOKMARK) {
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final boolean isMozillaShortcutURL = atts.getValue(uri, "owner").equals("Mozilla") && !atts.getValue(uri, "ShortcutURL").isEmpty();
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final boolean isYacyPublic = atts.getValue(uri, "owner").equals("YaCy") && !atts.getValue(uri, "public").isEmpty();
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if(isMozillaShortcutURL)
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this.bmk.put(YMarkEntry.BOOKMARK.TAGS.key(), YMarkUtil.cleanTagsString(atts.getValue(uri, "ShortcutURL")));
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if(isYacyPublic)
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this.bmk.put(YMarkEntry.BOOKMARK.PUBLIC.key(), atts.getValue(uri, "public"));
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}
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} else if (XBEL.ALIAS.tag().equals(tag)) {
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final String r = atts.getValue(uri, YMarkEntry.BOOKMARKS_REF);
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UpdateBmkRef(r, false);
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this.aliasRef.add(this.bmkRef.get(r));
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}
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else {
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this.outer_state = XBEL.NOTHING;
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this.inner_state = XBEL.NOTHING;
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this.parse_value = false;
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}
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}
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public void endElement(final String uri, final String name, String tag) {
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if (tag == null) return;
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tag = tag.toLowerCase();
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if(XBEL.BOOKMARK.tag().equals(tag)) {
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// write bookmark
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if (!this.bmk.isEmpty()) {
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this.bmk.put(YMarkEntry.BOOKMARK.FOLDERS.key(), this.folder.toString());
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try {
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bookmarks.put(this.bmk);
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bmk = new YMarkEntry();
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} catch (final InterruptedException e) {
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ConcurrentLog.logException(e);
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}
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}
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this.outer_state = XBEL.FOLDER;
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} else if (XBEL.FOLDER.tag().equals(tag)) {
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// go up one folder
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//TODO: get rid of .toString.equals()
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if(!this.folder.toString().equals(targetFolder)) {
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folder.setLength(folder.lastIndexOf(YMarkUtil.FOLDERS_SEPARATOR));
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}
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this.outer_state = XBEL.FOLDER;
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} else if (XBEL.INFO.tag().equals(tag)) {
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this.inner_state = XBEL.NOTHING;
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} else if (XBEL.METADATA.tag().equals(tag)) {
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this.inner_state = XBEL.INFO;
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}
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}
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public void characters(final char ch[], final int start, final int length) {
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// TODO move string processing to endElement as characters() could be called more than once per tag
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if (parse_value) {
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buffer.append(ch, start, length);
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switch(outer_state) {
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case BOOKMARK:
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switch(inner_state) {
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case DESC:
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this.bmk.put(YMarkEntry.BOOKMARK.DESC.key(), buffer.toString().trim());
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break;
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case TITLE:
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this.bmk.put(YMarkEntry.BOOKMARK.TITLE.key(), buffer.toString().trim());
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break;
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default:
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break;
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}
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break;
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case FOLDER:
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switch(inner_state) {
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case DESC:
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break;
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case TITLE:
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this.folder.append(YMarkUtil.FOLDERS_SEPARATOR);
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this.folder.append(this.buffer);
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break;
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default:
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break;
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}
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break;
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default:
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break;
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}
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this.buffer.setLength(0);
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this.parse_value = false;
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}
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}
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private void UpdateBmkRef(final String id, final boolean url) {
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this.folderstring.setLength(0);
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if(this.bmkRef.containsKey(id)) {
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this.folderstring.append(this.bmkRef.get(id).get(YMarkEntry.BOOKMARK.FOLDERS.key()));
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this.folderstring.append(',');
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this.ref = this.bmkRef.get(id);
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} else {
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this.ref = new YMarkEntry();
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}
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this.folderstring.append(this.folder);
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if(url)
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this.ref.put(YMarkEntry.BOOKMARK.URL.key(), this.bmk.get(YMarkEntry.BOOKMARK.URL.key()));
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this.ref.put(YMarkEntry.BOOKMARK.FOLDERS.key(), this.folderstring.toString());
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this.bmkRef.put(id, ref);
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}
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}
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}
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