http://stackoverflow.com/questions/7477712/sending-email-using-jsp/7478027#7478027
https://www.java.net/node/703177
-Djava.net.preferIPv4Stack=true
Thursday, June 26, 2014
Tuesday, June 24, 2014
Android Tutorial
android-hello-world-example-how-to-develop-android-apps.html
http://examples.javacodegeeks.com/android/core/android-debugging-on-a-real-device/
http://www.javacodegeeks.com/2010/10/android-full-application-tutorial.html
http://www.javacodegeeks.com/2011/06/android-game-development-tutorials.html
http://examples.javacodegeeks.com/android/core/build-android-application-package-file-apk-using-eclipse-ide/
http://examples.javacodegeeks.com/android/core/provider/android-contacts-example/
http://examples.javacodegeeks.com/android/core/content/broadcastreceiver/android-broadcast-receivers-example/
http://examples.javacodegeeks.com/android/core/content/contentprovider/android-content-provider-example/
http://www.javacodegeeks.com/2013/09/android-app-developmentweather-app-with-forecast.html
Thursday, June 12, 2014
Searching in PDF and other file formats
http://tika.apache.org/
http://www.programming-free.com/2012/11/simple-word-search-in-pdf-files-using.html
http://www.blog.computergodzilla.com/2012/12/apache-lucene-how-to-index-doc-pdf-and.html
http://www.blog.computergodzilla.com/2012/12/apache-lucene-how-to-parse-texts-from_30.html
http://kalanir.blogspot.sg/2008/07/extracting-text-from-xml-documents-for.html
http://www.programming-free.com/2012/11/simple-word-search-in-pdf-files-using.html
http://www.blog.computergodzilla.com/2012/12/apache-lucene-how-to-index-doc-pdf-and.html
http://www.blog.computergodzilla.com/2012/12/apache-lucene-how-to-parse-texts-from_30.html
http://kalanir.blogspot.sg/2008/07/extracting-text-from-xml-documents-for.html
Netbeans Platform with FX
http://netbeans.dzone.com/javafx-2-in-netbeans-rcp
http://www.aljoscha-rittner.de/blog/archive/2011/03/04/javafxdev-netbeans-platform-with-javafx-2-0ea/
http://www.aljoscha-rittner.de/blog/archive/2011/03/04/javafxdev-netbeans-platform-with-javafx-2-0ea/
Wednesday, June 11, 2014
Apache Lucene: TableSearcher.java (updated for Lucene v4.8)
TableSearcher.java
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package javaapplication3;
/**
* Copyright 2005 The Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
import org.apache.lucene.analysis.Analyzer;
//import org.apache.lucene.analysis.WhitespaceAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.queryparser.classic.MultiFieldQueryParser;
//import org.apache.lucene.search.Hits;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.store.RAMDirectory;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableModel;
import java.util.ArrayList;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.index.IndexWriterConfig.OpenMode;
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.search.TopDocs;
import org.apache.lucene.util.Version;
/**
* This is a TableModel that encapsulates Lucene search logic within a
* TableModel implementation. It is implemented as a TableModel decorator,
* similar to the TableSorter demo from Sun that decorates a TableModel and
* provides sorting functionality. The benefit of this architecture is that you
* can decorate any TableModel implementation with this searching table model --
* making it easy to add searching functionaliy to existing JTables -- or making
* new search capable table lucene.
*
*
* This decorator works by holding a reference to a decorated ot inner
* TableModel. All data is stored within that table model, not this table model.
* Rather, this table model simply manages links to data in the inner table
* model according to the search. All methods on TableSearcher forward to the
* inner table model with subtle filtering or alteration according to the search
* criteria.
*
*
* Using the table model:
*
* Pass the TableModel you want to decorate in at the constructor. When the
* TableModel initializes, it displays all search results. Call the search
* method with any valid Lucene search String and the data will be filtered by
* the search string. Users can always clear the search at any time by searching
* with an empty string. Additionally, you can add a button calling the
* clearSearch() method.
*
*/
public class TableSearcher extends AbstractTableModel {
/**
* The inner table model we are decorating
*/
protected TableModel tableModel;
/**
* This listener is used to register this class as a listener to the
* decorated table model for update events
*/
private TableModelListener tableModelListener;
/**
* these keeps reference to the decorated table model for data only rows
* that match the search criteria are linked
*/
private ArrayList rowToModelIndex = new ArrayList();
//Lucene stuff.
/**
* In memory lucene index
*/
private RAMDirectory directory;
/**
* Cached lucene analyzer
*/
private Analyzer analyzer;
/**
* Links between this table model and the decorated table model are
* maintained through links based on row number. This is a key constant to
* denote "row number" for indexing
*/
private static final String ROW_NUMBER = "ROW_NUMBER";
/**
* Cache the current search String. Also used internally to key whether
* there is an active search running or not. i.e. if searchString is null,
* there is no active search.
*/
private String searchString = null;
/**
* @param tableModel The table model to decorate
*/
public TableSearcher(TableModel tableModel) {
// analyzer = new WhitespaceAnalyzer();
analyzer = new StandardAnalyzer(Version.LUCENE_48);
tableModelListener = new TableModelHandler();
setTableModel(tableModel);
tableModel.addTableModelListener(tableModelListener);
clearSearchingState();
}
/**
*
* @return The inner table model this table model is decorating
*/
public TableModel getTableModel() {
return tableModel;
}
/**
* Set the table model used by this table model
*
* @param tableModel The new table model to decorate
*/
public void setTableModel(TableModel tableModel) {
//remove listeners if there...
if (this.tableModel != null) {
this.tableModel.removeTableModelListener(tableModelListener);
}
this.tableModel = tableModel;
if (this.tableModel != null) {
this.tableModel.addTableModelListener(tableModelListener);
}
//recalculate the links between this table model and
//the inner table model since the decorated model just changed
reindex();
// let all listeners know the table has changed
fireTableStructureChanged();
}
/**
* Reset the search results and links to the decorated (inner) table model
* from this table model.
*/
private void reindex() {
try {
// recreate the RAMDirectory
directory = new RAMDirectory();
Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_48);
IndexWriterConfig iwc = new IndexWriterConfig(Version.LUCENE_48, analyzer);
boolean create = true;
if (create) {
// Create a new index in the directory, removing any
// previously indexed documents:
iwc.setOpenMode(OpenMode.CREATE);
} else {
// Add new documents to an existing index:
iwc.setOpenMode(OpenMode.CREATE_OR_APPEND);
}
// Optional: for better indexing performance, if you
// are indexing many documents, increase the RAM
// buffer. But if you do this, increase the max heap
// size to the JVM (eg add -Xmx512m or -Xmx1g):
//
// iwc.setRAMBufferSizeMB(256.0);
IndexWriter writer = new IndexWriter(directory, iwc);
// indexDocs(writer, docDir);
// iterate through all rows
for (int row = 0; row < tableModel.getRowCount(); row++) {
//for each row make a new document
Document document = new Document();
//add the row number of this row in the decorated table model
//this will allow us to retrive the results later
//and map this table model's row to a row in the decorated
//table model
document.add(new Field(ROW_NUMBER, "" + row, Field.Store.YES, Field.Index.ANALYZED));
//iterate through all columns
//index the value keyed by the column name
//NOTE: there could be a problem with using column names with spaces
for (int column = 0; column < tableModel.getColumnCount(); column++) {
String columnName = tableModel.getColumnName(column);
String columnValue = String.valueOf(tableModel.getValueAt(row, column)).toLowerCase();
document.add(new Field(columnName, columnValue, Field.Store.YES, Field.Index.ANALYZED));
}
writer.addDocument(document);
}
// writer.optimize();
writer.close();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* @return The current lucene analyzer
*/
public Analyzer getAnalyzer() {
return analyzer;
}
/**
* @param analyzer The new analyzer to use
*/
public void setAnalyzer(Analyzer analyzer) {
this.analyzer = analyzer;
//reindex from the model with the new analyzer
reindex();
//rerun the search if there is an active search
if (isSearching()) {
search(searchString);
}
}
/**
* Run a new search.
*
* @param searchString Any valid lucene search string
*/
public void search(String searchString) {
//if search string is null or empty, clear the search == search all
if (searchString == null || searchString.equals("")) {
clearSearchingState();
fireTableDataChanged();
return;
}
try {
//cache search String
this.searchString = searchString;
// String index = "";
// IndexReader reader = DirectoryReader.open(FSDirectory.open(new File(index)));
// IndexSearcher is = new IndexSearcher(reader);
// :Post-Release-Update-Version.LUCENE_XY:
// Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_48);
IndexReader reader = IndexReader.open(directory);
//make a new index searcher with the in memory (RAM) index.I
IndexSearcher is = new IndexSearcher(reader);
//make an array of fields - one for each column
String[] fields = new String[tableModel.getColumnCount()];
for (int t = 0; t < tableModel.getColumnCount(); t++) {
fields[t] = tableModel.getColumnName(t);
}
//build a query based on the fields, searchString and cached analyzer
//NOTE: This is an area for improvement since the MultiFieldQueryParser
// has some weirdness.
MultiFieldQueryParser parser = new MultiFieldQueryParser(Version.LUCENE_36, fields, analyzer);
Query query = parser.parse(searchString);
//run the search
TopDocs hits = is.search(query, 10);
//reset this table model with the new results
resetSearchResults(hits);
} catch (Exception e) {
e.printStackTrace();
}
//notify all listeners that the table has been changed
fireTableStructureChanged();
}
/**
*
* @param hits The new result set to set this table to.
*/
private void resetSearchResults(TopDocs hits) {
try {
//clear our index mapping this table model rows to
//the decorated inner table model
rowToModelIndex.clear();
//iterate through the hits
//get the row number stored at the index
//that number is the row number of the decorated
//tabble model row that we are mapping to
for (int t = 0; t < hits.totalHits; t++) {
ScoreDoc document = hits.scoreDocs[t];
rowToModelIndex.add(document.doc);
}
} catch (Exception e) {
e.printStackTrace();
}
}
private int getModelRow(int row) {
return ((Integer) rowToModelIndex.get(row)).intValue();
}
/**
* Clear the currently active search Resets the complete dataset of the
* decorated table model.
*/
private void clearSearchingState() {
searchString = null;
rowToModelIndex.clear();
for (int t = 0; t < tableModel.getRowCount(); t++) {
rowToModelIndex.add(new Integer(t));
}
}
// TableModel interface methods
public int getRowCount() {
return (tableModel == null) ? 0 : rowToModelIndex.size();
}
public int getColumnCount() {
return (tableModel == null) ? 0 : tableModel.getColumnCount();
}
public String getColumnName(int column) {
return tableModel.getColumnName(column);
}
public Class getColumnClass(int column) {
return tableModel.getColumnClass(column);
}
public boolean isCellEditable(int row, int column) {
return tableModel.isCellEditable(getModelRow(row), column);
}
public Object getValueAt(int row, int column) {
return tableModel.getValueAt(getModelRow(row), column);
}
public void setValueAt(Object aValue, int row, int column) {
tableModel.setValueAt(aValue, getModelRow(row), column);
}
private boolean isSearching() {
return searchString != null;
}
private class TableModelHandler implements TableModelListener {
public void tableChanged(TableModelEvent e) {
// If we're not searching, just pass the event along.
if (!isSearching()) {
clearSearchingState();
reindex();
fireTableChanged(e);
return;
}
// Something has happened to the data that may have invalidated the search.
reindex();
search(searchString);
fireTableDataChanged();
return;
}
}
}
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