/*
* Copyright (C) 2011-2012 Dr. John Lindsay <jlindsay@uoguelph.ca>
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
package plugins;
import java.io.File;
import whitebox.geospatialfiles.ShapeFile;
import whitebox.geospatialfiles.WhiteboxRaster;
import whitebox.geospatialfiles.shapefile.attributes.DBFField;
import whitebox.geospatialfiles.shapefile.attributes.DBFWriter;
import whitebox.geospatialfiles.shapefile.ShapeType;
import whitebox.interfaces.WhiteboxPlugin;
import whitebox.interfaces.WhiteboxPluginHost;
/**
* Converts a raster dataset to a shapefile of the Point shapetype.
*
* @author Dr. John Lindsay email: jlindsay@uoguelph.ca
*/
public class RasterToVectorPoints implements WhiteboxPlugin {
private WhiteboxPluginHost myHost = null;
private String[] args;
/**
* Used to retrieve the plugin tool's name. This is a short, unique name
* containing no spaces.
*
* @return String containing plugin name.
*/
@Override
public String getName() {
return "RasterToVectorPoints";
}
/**
* Used to retrieve the plugin tool's descriptive name. This can be a longer
* name (containing spaces) and is used in the interface to list the tool.
*
* @return String containing the plugin descriptive name.
*/
@Override
public String getDescriptiveName() {
return "Raster To Vector Points";
}
/**
* Used to retrieve a short description of what the plugin tool does.
*
* @return String containing the plugin's description.
*/
@Override
public String getToolDescription() {
return "Converts a raster containing points into a vector.";
}
/**
* Used to identify which toolboxes this plugin tool should be listed in.
*
* @return Array of Strings.
*/
@Override
public String[] getToolbox() {
String[] ret = { "RasterVectorConversions" };
return ret;
}
/**
* Sets the WhiteboxPluginHost to which the plugin tool is tied. This is the
* class that the plugin will send all feedback messages, progress updates,
* and return objects.
*
* @param host The WhiteboxPluginHost that called the plugin tool.
*/
@Override
public void setPluginHost(WhiteboxPluginHost host) {
myHost = host;
}
/**
* Used to communicate feedback pop-up messages between a plugin tool and
* the main Whitebox user-interface.
*
* @param feedback String containing the text to display.
*/
private void showFeedback(String message) {
if (myHost != null) {
myHost.showFeedback(message);
} else {
System.out.println(message);
}
}
/**
* Used to communicate a return object from a plugin tool to the main
* Whitebox user-interface.
*
* @return Object, such as an output WhiteboxRaster.
*/
private void returnData(Object ret) {
if (myHost != null) {
myHost.returnData(ret);
}
}
private int previousProgress = 0;
private String previousProgressLabel = "";
/**
* Used to communicate a progress update between a plugin tool and the main
* Whitebox user interface.
*
* @param progressLabel A String to use for the progress label.
* @param progress Float containing the progress value (between 0 and 100).
*/
private void updateProgress(String progressLabel, int progress) {
if (myHost != null && ((progress != previousProgress) ||
(!progressLabel.equals(previousProgressLabel)))) {
myHost.updateProgress(progressLabel, progress);
}
previousProgress = progress;
previousProgressLabel = progressLabel;
}
/**
* Used to communicate a progress update between a plugin tool and the main
* Whitebox user interface.
*
* @param progress Float containing the progress value (between 0 and 100).
*/
private void updateProgress(int progress) {
if (myHost != null && progress != previousProgress) {
myHost.updateProgress(progress);
}
previousProgress = progress;
}
/**
* Sets the arguments (parameters) used by the plugin.
*
* @param args An array of string arguments.
*/
@Override
public void setArgs(String[] args) {
this.args = args.clone();
}
private boolean cancelOp = false;
/**
* Used to communicate a cancel operation from the Whitebox GUI.
*
* @param cancel Set to true if the plugin should be canceled.
*/
@Override
public void setCancelOp(boolean cancel) {
cancelOp = cancel;
}
private void cancelOperation() {
showFeedback("Operation cancelled.");
updateProgress("Progress: ", 0);
}
private boolean amIActive = false;
/**
* Used by the Whitebox GUI to tell if this plugin is still running.
*
* @return a boolean describing whether or not the plugin is actively being
* used.
*/
@Override
public boolean isActive() {
return amIActive;
}
/**
* Used to execute this plugin tool.
*/
@Override
public void run() {
amIActive = true;
String inputHeader;
String outputFileName;
int row, col, x, y;
double xCoord, yCoord, value;
int progress;
if (args.length <= 0) {
showFeedback("Plugin parameters have not been set.");
return;
}
inputHeader = args[0];
outputFileName = args[1];
// check to see that the inputHeader and outputHeader are not null.
if ((inputHeader == null) || (outputFileName == null)) {
showFeedback("One or more of the input parameters have not been set properly.");
return;
}
try {
WhiteboxRaster inputRaster = new WhiteboxRaster(inputHeader, "r");
int rows = inputRaster.getNumberRows();
int cols = inputRaster.getNumberColumns();
// set up the output files of the shapefile and the dbf
ShapeFile output = new ShapeFile(outputFileName, ShapeType.POINT);
DBFField fields[] = new DBFField[2];
fields[0] = new DBFField();
fields[0].setName("FID");
fields[0].setDataType(DBFField.DBFDataType.NUMERIC);
fields[0].setFieldLength(10);
fields[0].setDecimalCount(0);
fields[1] = new DBFField();
fields[1].setName("VALUE");
fields[1].setDataType(DBFField.DBFDataType.NUMERIC);
fields[1].setFieldLength(10);
fields[1].setDecimalCount(3);
String DBFName = output.getDatabaseFile();
DBFWriter writer = new DBFWriter(new File(DBFName)); /* this DBFWriter object is now in Syc Mode */
writer.setFields(fields);
int FID = 0;
for (row = 0; row < rows; row++) {
for (col = 0; col < cols; col++) {
value = inputRaster.getValue(row, col);
if (value > 0) {
FID++;
xCoord = inputRaster.getXCoordinateFromColumn(col);
yCoord = inputRaster.getYCoordinateFromRow(row);
whitebox.geospatialfiles.shapefile.Point pnt =
new whitebox.geospatialfiles.shapefile.Point(xCoord, yCoord);
output.addRecord(pnt);
Object[] rowData = new Object[2];
rowData[0] = new Double(FID);
rowData[1] = new Double(value);
writer.addRecord(rowData);
}
}
if (cancelOp) {
cancelOperation();
return;
}
progress = (int)(100f * row / (rows - 1));
updateProgress(progress);
}
output.write();
writer.write();
inputRaster.close();
// returning a header file string displays the image.
returnData(outputFileName);
} catch (OutOfMemoryError oe) {
myHost.showFeedback("An out-of-memory error has occurred during operation.");
} catch (Exception e) {
myHost.showFeedback("An error has occurred during operation. See log file for details.");
myHost.logException("Error in " + getDescriptiveName(), e);
} finally {
updateProgress("Progress: ", 0);
// tells the main application that this process is completed.
amIActive = false;
myHost.pluginComplete();
}
}
// // This method is only used during testing.
// public static void main(String[] args) {
// args = new String[3];
// args[0] = "/Users/johnlindsay/Documents/Data/tmp4.dep";
// args[1] = "/Users/johnlindsay/Documents/Data/tmp4.shp";
//
// RasterToVectorPoints rtvp = new RasterToVectorPoints();
// rtvp.setArgs(args);
// rtvp.run();
// }
}