*) Classes to handle import of lists (especially blacklists) from XML files, not used yet, but will be used soon.
git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@5780 6c8d7289-2bf4-0310-a012-ef5d649a1542pull/1/head
low012
16 years ago
parent
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commit
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// XmlBlacklistImporter.java
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// -------------------------------------
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// part of YACY
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//
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// (C) 2009 by Marc Nause
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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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// 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 de.anomic.data.list;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.LinkedList;
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import java.util.List;
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import java.util.Map;
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/**
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* This class is used to store content and properties of several blacklists.
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*/
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public class ListAccumulator {
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private final Map<String,Integer> names = new HashMap<String,Integer>();
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private final List<List<String>> entries = new ArrayList<List<String>>();
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private final List<Map<String,String>> properties = new ArrayList<Map<String,String>>();
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private int listCount = 0;
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private List<String> currentEntries;
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private Map<String,String> currentProperties;
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/**
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* Adds a new list if a list by that name does not exist yet.
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* @param name The name of the list to be added.
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* @return True if the new list has been added, else false (if list by name exists already).
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*/
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public boolean addList(final String name) {
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boolean ret = false;
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if (!names.containsKey(name)) {
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names.put(name, listCount);
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entries.add(new LinkedList<String>());
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properties.add(new HashMap<String,String>());
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currentEntries = entries.get(listCount);
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currentProperties = properties.get(listCount);
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listCount++;
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ret = true;
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}
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return ret;
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}
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/**
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* Adds a new entry to a list identified by a given name.
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* @param name The name of the list the entry is to be added to.
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* @param entry The new entry.
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* @return True if the entry has been added, else false (if list does not exists).
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*/
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public boolean addEntry(final String list, final String entry) {
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boolean ret = false;
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if (names.containsKey(list)) {
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entries.get(names.get(list)).add(entry);
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ret = true;
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}
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return ret;
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}
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/**
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* Adds a new entry to the list which has been added as the latest.
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* @param entry The new entry.
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* @return True if the entry has been added, else false (if no list has been added yet).
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*/
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public boolean addEntryToCurrent(final String entry) {
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boolean ret = false;
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if (currentEntries != null) {
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currentEntries.add(entry);
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ret = true;
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}
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return ret;
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}
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/**
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* Adds a new property to a list identified by a given name.
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* @param list The name of the list.
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* @param property The name of the property.
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* @param value The value of the property.
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* @return True if the property has been added, else false (if list does not exists).
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*/
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public boolean addProperty(final String list, final String property, final String value) {
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boolean ret = false;
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if (names.containsKey(list)) {
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properties.get(names.get(list)).put(property, value);
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ret = true;
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}
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return ret;
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}
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/**
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* Adds a new property to the list which has been added as the latest.
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* @param list The name of the list.
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* @param property The name of the property.
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* @param value The value of the property.
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* @return True if the property has been added, else false (if no list has been added yet).
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*/
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public boolean addPropertyToCurrent(final String property, final String value) {
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boolean ret = false;
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if (currentProperties != null) {
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currentProperties.put(property, value);
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ret = true;
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}
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return ret;
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}
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/**
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* Returns a {@link List} which contains all the {@link List Lists} of entries.
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* @return list of lists.
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*/
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public List<List<String>> getEntryLists() {
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return entries;
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}
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/**
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* Returns a {@link List} which contains all the {@link Maps} of entries.
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* @return
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*/
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public List<Map<String,String>> getPropertyMaps() {
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return properties;
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}
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}
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@ -0,0 +1,176 @@
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// XmlBlacklistImporter.java
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// -------------------------------------
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// part of YACY
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//
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// (C) 2009 by Marc Nause
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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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// 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 de.anomic.data.list;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.Reader;
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import org.apache.xerces.parsers.SAXParser;
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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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/**
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* This class provides methods to import blacklists from an XML file (see
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* http://www.yacy-websuche.de/wiki/index.php/Dev:APIblacklists
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* for examples) and to return this data as a {@link ListAccumulator} object.
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*/
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public class XMLBlacklistImporter extends DefaultHandler {
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private ListAccumulator ba = null;
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private String currentListName = null;
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private String lastText = null;
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/**
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* Takes the input data and turns it into a {@link ListAccumulator} which can
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* be used for further processing.
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* @param input the XML data
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* @return the data from the XML
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* @throws java.io.IOException if input can't be read
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* @throws org.xml.sax.SAXException if XML can't be parsed
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*/
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public synchronized ListAccumulator parse(InputSource input) throws IOException, SAXException {
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XMLReader reader = new SAXParser();
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reader.setContentHandler(this);
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reader.parse(input);
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return ba;
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}
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/**
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* Takes the input data and turns it into a {@link ListAccumulator} which can
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* be used for further processing.
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* @param input the XML data
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* @return the data from the XML
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* @throws java.io.IOException if input can't be read
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* @throws org.xml.sax.SAXException if XML can't be parsed
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*/
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public synchronized ListAccumulator parse(Reader input) throws IOException, SAXException {
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return this.parse(new InputSource(input));
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}
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/**
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* Takes the input data and turns it into a {@link ListAccumulator} which can
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* be used for further processing.
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* @param input the XML data
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* @return the data from the XML
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* @throws java.io.IOException if input can't be read
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* @throws org.xml.sax.SAXException if XML can't be parsed
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*/
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public synchronized ListAccumulator parse(String input) throws IOException, SAXException {
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return this.parse(new InputSource(input));
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}
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/**
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* Takes the input data and turns it into a {@link ListAccumulator} which can
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* be used for further processing.
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* @param input The XML data.
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* @return The data from the XML.
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* @throws java.io.IOException if input can't be read
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* @throws org.xml.sax.SAXException if XML can't be parsed
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*/
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public synchronized ListAccumulator parse(InputStream input) throws IOException, SAXException {
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return this.parse(new InputSource(input));
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}
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/**
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* At the start of the document a new {@link ListAccumulator} is created.
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*/
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@Override
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public void startDocument() {
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ba = new ListAccumulator();
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}
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/**
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* If the <list> tag is encountered a new list will be addedto the
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* {@link ListAccumulator} and the properties of the list will be set
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* if provided in the XML.
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* @param uri The Namespace URI, or the empty string if the
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* element has no Namespace URI or if Namespace
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* processing is not being performed.
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* @param localName The local name (without prefix), or the
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* empty string if Namespace processing is not being
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* performed.
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* @param qName The qualified name (with prefix), or the
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* empty string if qualified names are not available.
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* @param attributes The attributes attached to the element. If
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* there are no attributes, it shall be an empty
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* Attributes object.
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*/
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@Override
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public void startElement(final String uri, final String localName, final String qName, final Attributes attributes) {
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if (qName.equalsIgnoreCase("list")) {
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currentListName = attributes.getValue("name");
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ba.addList(currentListName);
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int attributesLength = 0;
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if ((attributesLength = attributes.getLength()) > 1) {
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for (int i = 0; i < attributesLength; i++) {
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if (!attributes.getQName(i).equals("name")) {
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ba.addPropertyToCurrent(attributes.getQName(i), attributes.getValue(i));
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}
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}
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}
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}
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}
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/**
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* Adds a new item to the current list in the {@link ListAccumulator}.
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* @param uri The Namespace URI, or the empty string if the
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* element has no Namespace URI or if Namespace
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* processing is not being performed.
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* @param localName The local name (without prefix), or the
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* empty string if Namespace processing is not being
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* performed.
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* @param qName The qualified name (with prefix), or the
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* empty string if qualified names are not available.
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* @throws org.xml.sax.SAXException
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*/
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@Override
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public void endElement(final String uri, final String localName, final String qName) throws SAXException {
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if (qName.equalsIgnoreCase("item")) {
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ba.addEntryToCurrent(lastText);
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}
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}
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/**
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* Writes characters to a String which might be used by endElement() later.
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* @param ch The characters.
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* @param start The start position in the character array.
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* @param lengthThe number of characters to use from the character array.
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* @throws org.xml.sax.SAXException
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*/
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@Override
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public void characters(char[] ch, int start, int length) throws SAXException {
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lastText = new String(ch, start, length);
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}
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}
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