private static void doProcessing() throws GeoAlgorithmExecutionException, IOException {
final GridCoverage2D gc = openRasterLayer("c:/dem.asc");
final GTRasterLayer raster = new GTRasterLayer();
raster.create(gc);
final FeatureSource fs = openShapefile("c:/poly.shp");
final GTVectorLayer vector = new GTVectorLayer();
vector.create(fs);
final ClipGridAlgorithm alg = new ClipGridAlgorithm();
final ParametersSet params = alg.getParameters();
params.getParameter(ClipGridAlgorithm.INPUT).setParameterValue(raster);
params.getParameter(ClipGridAlgorithm.POLYGONS).setParameterValue(vector);
final OutputObjectsSet outputs = alg.getOutputObjects();
final Output twi = outputs.getOutput(ClipGridAlgorithm.RESULT);
twi.setOutputChannel(new FileOutputChannel("c:/clipped.tif"));
alg.execute(null, m_OutputFactory);
}
/**
* Returns the help associated with a given geoalgorithm as a html-formatted string
*
* @param alg the geoalgorithm
* @param sFilename the filename where help for the passed algorithm is stored
* @return a html-formatted string with help for the given algorithm
*/
public static String getHelpAsHTMLCode(final GeoAlgorithm alg, final String sFilename) {
HelpElement element;
final ArrayList list = open(sFilename);
HashMap elements;
final String sPath =
"file:///" + sFilename.substring(0, sFilename.lastIndexOf(File.separator)) + File.separator;
if (list != null) {
elements = createMap(list);
} else {
elements = new HashMap();
}
final HTMLDoc doc = new HTMLDoc();
doc.open(alg.getName());
doc.addHeader(Sextante.getText(alg.getName()), 1);
doc.addHeader(Sextante.getText("Description"), 2);
element = (HelpElement) elements.get("DESCRIPTION");
if (element != null) {
doc.addParagraph(element.getTextAsFormattedHTML());
for (int j = 0; j < element.getImages().size(); j++) {
final ImageAndDescription iad = (ImageAndDescription) element.getImages().get(j);
doc.addImageAndDescription(sPath + iad.getFilename(), iad.getDescription());
}
}
doc.addHeader(Sextante.getText("Parameters"), 2);
final ParametersSet params = alg.getParameters();
doc.startUnorderedList();
for (int i = 0; i < params.getNumberOfParameters(); i++) {
final Parameter param = params.getParameter(i);
String sParam = param.getParameterDescription();
sParam = "<b>" + sParam + "[" + getParameterTypeName(param) + "]: </b>";
element = (HelpElement) elements.get(param.getParameterName());
if (element != null) {
sParam = sParam + element.getTextAsFormattedHTML();
}
doc.addListElement(sParam);
if (element != null) {
for (int j = 0; j < element.getImages().size(); j++) {
final ImageAndDescription iad = (ImageAndDescription) element.getImages().get(j);
doc.addImageAndDescription(sPath + iad.getFilename(), iad.getDescription());
}
}
}
doc.closeUnorderedList();
doc.addHeader(Sextante.getText("Outputs"), 2);
element = (HelpElement) elements.get("OUTPUT_DESCRIPTION");
if (element != null) {
doc.addParagraph(element.getTextAsFormattedHTML());
for (int j = 0; j < element.getImages().size(); j++) {
final ImageAndDescription iad = (ImageAndDescription) element.getImages().get(j);
doc.addImageAndDescription(sPath + iad.getFilename(), iad.getDescription());
}
}
doc.startUnorderedList();
final OutputObjectsSet oo = alg.getOutputObjects();
String sOutputType = "";
for (int i = 0; i < oo.getOutputObjectsCount(); i++) {
final Output out = oo.getOutput(i);
String sOutput = out.getDescription();
if (out instanceof OutputRasterLayer) {
sOutputType = Sextante.getText("Raster_Layer");
} else if (out instanceof Output3DRasterLayer) {
sOutputType = Sextante.getText("3D_Raster_layer");
} else if (out instanceof OutputVectorLayer) {
sOutputType = Sextante.getText("Vector_Layer");
final OutputVectorLayer ovl = (OutputVectorLayer) out;
switch (ovl.getShapeType()) {
case OutputVectorLayer.SHAPE_TYPE_UNDEFINED:
default:
sOutputType = sOutputType + " - " + Sextante.getText("Any_type");
break;
case OutputVectorLayer.SHAPE_TYPE_LINE:
sOutputType = sOutputType + " - " + Sextante.getText("Line");
break;
case OutputVectorLayer.SHAPE_TYPE_POLYGON:
sOutputType = sOutputType + " - " + Sextante.getText("Polygon");
break;
case OutputVectorLayer.SHAPE_TYPE_POINT:
sOutputType = sOutputType + " - " + Sextante.getText("Point");
break;
}
} else if (out instanceof OutputTable) {
sOutputType = Sextante.getText("Table");
} else if (out instanceof OutputChart) {
sOutputType = Sextante.getText("graph-chart");
} else if (out instanceof OutputText) {
sOutputType = Sextante.getText("Text");
} else if (out instanceof OutputNumericalValue) {
sOutputType = Sextante.getText("Numerical_value");
}
sOutput = "<b>" + sOutput + "[" + sOutputType + "]: </b>";
element = (HelpElement) elements.get(out.getName());
if (element != null) {
sOutput = sOutput + element.getTextAsFormattedHTML();
}
doc.addListElement(sOutput);
if (element != null) {
for (int j = 0; j < element.getImages().size(); j++) {
final ImageAndDescription iad = (ImageAndDescription) element.getImages().get(j);
doc.addImageAndDescription(sPath + iad.getFilename(), iad.getDescription());
}
}
}
doc.closeUnorderedList();
doc.addHeader(Sextante.getText("Additional_information"), 2);
element = (HelpElement) elements.get("ADDITIONAL_INFO");
if (element != null) {
doc.addParagraph(element.getTextAsFormattedHTML());
for (int j = 0; j < element.getImages().size(); j++) {
final ImageAndDescription iad = (ImageAndDescription) element.getImages().get(j);
doc.addImageAndDescription(sPath + iad.getFilename(), iad.getDescription());
}
}
doc.addHeader(Sextante.getText("Command_line"), 2);
String sText = alg.getCommandLineHelp();
sText = sText.replaceAll("\n", "<br>");
sText = sText.replace(" ", "   ");
doc.addCourierText(sText);
doc.addParagraph("");
element = (HelpElement) elements.get("EXTENSION_AUTHOR");
if (element != null) {
doc.addParagraph(
"<i>" + Sextante.getText("Algorithm_created_by") + " " + element.getText() + "</i>");
for (int j = 0; j < element.getImages().size(); j++) {
final ImageAndDescription iad = (ImageAndDescription) element.getImages().get(j);
doc.addImageAndDescription(sPath + iad.getFilename(), iad.getDescription());
}
}
element = (HelpElement) elements.get("HELP_AUTHOR");
if (element != null) {
doc.addParagraph(
"<i>" + Sextante.getText("Help_file_created_by") + " " + element.getText() + "</i>");
for (int j = 0; j < element.getImages().size(); j++) {
final ImageAndDescription iad = (ImageAndDescription) element.getImages().get(j);
doc.addImageAndDescription(sPath + iad.getFilename(), iad.getDescription());
}
}
doc.close();
return doc.getHTMLCode();
}
private static void doProcessing() throws GeoAlgorithmExecutionException, IOException {
/*
* First we need some data.
* Let's open a DEM
*/
final GridCoverage2D gc = openRasterLayer("d:\\gisdata\\dem.asc");
/*
* To use this data we need to wrap it with an object
* that implements the IRasterLayer, so SEXTANTE algorithms
* can access it.
* Since it is a Geotools object, we will use the Geotools
* wrapper class GTRasterLayer
*/
final GTRasterLayer layer = new GTRasterLayer();
layer.create(gc);
/*
* Now we will calculate contour lines from that DEM
*/
final ContourLinesAlgorithm alg = new ContourLinesAlgorithm();
final ParametersSet params = alg.getParameters();
params.getParameter(ContourLinesAlgorithm.LAYER).setParameterValue(layer);
params.getParameter(ContourLinesAlgorithm.DISTANCE).setParameterValue(new Double(100.));
params.getParameter(ContourLinesAlgorithm.MIN).setParameterValue(new Double(0.));
params.getParameter(ContourLinesAlgorithm.MAX).setParameterValue(new Double(10000.));
/*
* This algorithm will generate a new vector layer.
* We can select "where" to put the result. To do this, we
* retrieve the output container and set the output channel,
* which contains information about the destiny of the resulting
* data. The most common way of using this is setting
* a FileOutputChannel, which contains the information needed to
* put the output to a file (basically a filename).
* If we omit this, a FileOutputChannel will be used,
* using a temporary filename.
*/
final OutputObjectsSet outputs = alg.getOutputObjects();
final Output contours = outputs.getOutput(ContourLinesAlgorithm.RESULT);
contours.setOutputChannel(new FileOutputChannel("d:\\gisdata\\contours2.shp"));
/*
* Execute the algorithm. We use no task monitor,
* so we will not be able to monitor the progress
* of the execution. SEXTANTE also provides a DefaultTaskMonitor,
* which shows a simple progress bar, or you could make your
* own one, implementing the ITaskMonitor interface
*
* The execute method returns true if everything went OK, or false if it
* was canceled. Since we are not giving the user the chance to
* cancel it (there is no task monitor), we do not care about the
* return value.
*
* If something goes wrong, it will throw an exception.
*/
alg.execute(null, m_OutputFactory);
/*
* Now the result can be taken from the output container
*/
final IVectorLayer result = (IVectorLayer) contours.getOutputObject();
/*
* And now we can do with it whatever we want.
* Let's print some information to see that the layer has
* been correctly created.
* Before accesing the layer, we have to call the open() method;
*/
result.open();
System.out.println(
"This layer contains " + Integer.toString(result.getShapesCount()) + " lines.");
}