/*
Copyright 2008-2010 Gephi
Authors : Mathieu Bastian <mathieu.bastian@gephi.org>, Sebastien Heymann <sebastien.heymann@gephi.org>
Website : http://www.gephi.org
This file is part of Gephi.
DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
Copyright 2011 Gephi Consortium. All rights reserved.
The contents of this file are subject to the terms of either the GNU
General Public License Version 3 only ("GPL") or the Common
Development and Distribution License("CDDL") (collectively, the
"License"). You may not use this file except in compliance with the
License. You can obtain a copy of the License at
http://gephi.org/about/legal/license-notice/
or /cddl-1.0.txt and /gpl-3.0.txt. See the License for the
specific language governing permissions and limitations under the
License. When distributing the software, include this License Header
Notice in each file and include the License files at
/cddl-1.0.txt and /gpl-3.0.txt. If applicable, add the following below the
License Header, with the fields enclosed by brackets [] replaced by
your own identifying information:
"Portions Copyrighted [year] [name of copyright owner]"
If you wish your version of this file to be governed by only the CDDL
or only the GPL Version 3, indicate your decision by adding
"[Contributor] elects to include this software in this distribution
under the [CDDL or GPL Version 3] license." If you do not indicate a
single choice of license, a recipient has the option to distribute
your version of this file under either the CDDL, the GPL Version 3 or
to extend the choice of license to its licensees as provided above.
However, if you add GPL Version 3 code and therefore, elected the GPL
Version 3 license, then the option applies only if the new code is
made subject to such option by the copyright holder.
Contributor(s):
Portions Copyrighted 2011 Gephi Consortium.
*/
package org.gephi.io.importer.plugin.file;
import java.io.LineNumberReader;
import java.io.Reader;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.gephi.io.importer.api.ContainerLoader;
import org.gephi.io.importer.api.EdgeDraft;
import org.gephi.io.importer.api.ImportUtils;
import org.gephi.io.importer.api.NodeDraft;
import org.gephi.io.importer.api.Report;
import org.gephi.io.importer.spi.FileImporter;
import org.gephi.utils.longtask.spi.LongTask;
import org.gephi.utils.progress.Progress;
import org.gephi.utils.progress.ProgressTicket;
/**
*
* @author Mathieu Bastian, Sebastien Heymann
*/
public class ImporterCSV implements FileImporter, LongTask {
//Architecture
private Reader reader;
private ContainerLoader container;
private Report report;
private ProgressTicket progressTicket;
private boolean cancel = false;
@Override
public boolean execute(ContainerLoader container) {
this.container = container;
this.report = new Report();
LineNumberReader lineReader = ImportUtils.getTextReader(reader);
try {
importData(lineReader);
} catch (Exception e) {
throw new RuntimeException(e);
}
return !cancel;
}
private void importData(LineNumberReader reader) throws Exception {
Progress.start(progressTicket); //Progress
List<String> lines = new ArrayList<String>();
for (; reader.ready();) {
String line = reader.readLine();
if (line != null && !line.isEmpty()) {
lines.add(line);
}
}
Progress.switchToDeterminate(progressTicket, lines.size());
//Magix regex
Pattern pattern = Pattern.compile("(?<=(?:,|;|\\s|^)\")(.*?)(?=(?<=(?:[^\\\\]))\",|;|\"\\s|\"$)|(?<=(?:,|;|\\s|^)')(.*?)(?=(?<=(?:[^\\\\]))',|;|'\\s|'$)|(?<=(?:,|;|\\s|^))(?=[^'\"])(.*?)(?=(?:,|;|\\s|$))|(?<=,|;)($)");
if (lines.get(0).startsWith(";")) { //Matrix
//Fill the Labels array
String line0 = lines.get(0);
line0 = line0.substring(1, line0.length());
lines.remove(0);
Matcher m = pattern.matcher(line0); //Remove the first ";"
List<String> labels = new ArrayList<String>();
while (m.find()) {
int start = m.start();
int end = m.end();
if (start != end) {
String data = line0.substring(start, end);
data = data.trim();
if (!data.isEmpty() && !data.toLowerCase().equals("null")) {
labels.add(data);
}
}
}
int size = lines.size();
if (size != labels.size()) {
throw new Exception("Inconsistent number of matrix lines compared to the number of labels.");
}
for (int i = 0; i < size; i++) {
if (cancel) {
return;
}
String line = lines.get(i);
m = pattern.matcher(line);
int count = -1;
String sourceID = "";
while (m.find()) {
int start = m.start();
int end = m.end();
if (start != end) {
String data = line.substring(start, end);
data = data.trim();
if (!data.isEmpty() && !data.toLowerCase().equals("null")) {
if (count == -1) {
sourceID = data;
addNode(sourceID, labels.get(i));
} else if (!data.equals("0")) {
//Create Edge
addEdge(sourceID, labels.get(count), Float.parseFloat(data));
}
}
}
count++;
}
Progress.progress(progressTicket); //Progress
}
} else { //Edge or Adjacency list
Matcher m;
for (String line : lines) {
if (cancel) {
return;
}
m = pattern.matcher(line);
int count = 0;
String sourceID = "";
while (m.find()) {
int start = m.start();
int end = m.end();
if (start != end) {
String data = line.substring(start, end);
data = data.trim();
if (!data.isEmpty() && !data.toLowerCase().equals("null")) {
if (count == 0) {
sourceID = data;
addNode(sourceID, data);
} else {
//Create Edge
addEdge(sourceID, data);
}
}
}
count++;
}
Progress.progress(progressTicket); //Progress
}
}
}
private void addNode(String id, String label) {
NodeDraft node;
if (!container.nodeExists(id)) {
node = container.factory().newNodeDraft(id);
node.setLabel(label);
container.addNode(node);
}
}
private void addEdge(String source, String target) {
addEdge(source, target, 1);
}
private void addEdge(String source, String target, float weight) {
NodeDraft sourceNode;
if (!container.nodeExists(source)) {
sourceNode = container.factory().newNodeDraft(source);
container.addNode(sourceNode);
} else {
sourceNode = container.getNode(source);
}
NodeDraft targetNode;
if (!container.nodeExists(target)) {
targetNode = container.factory().newNodeDraft(target);
container.addNode(targetNode);
} else {
targetNode = container.getNode(target);
}
EdgeDraft edge = container.factory().newEdgeDraft();
edge.setSource(sourceNode);
edge.setTarget(targetNode);
edge.setWeight(weight);
container.addEdge(edge);
}
@Override
public void setReader(Reader reader) {
this.reader = reader;
}
@Override
public ContainerLoader getContainer() {
return container;
}
@Override
public Report getReport() {
return report;
}
@Override
public boolean cancel() {
cancel = true;
return true;
}
@Override
public void setProgressTicket(ProgressTicket progressTicket) {
this.progressTicket = progressTicket;
}
}