package org.geoserver.web.crs;
import java.awt.image.RenderedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Locale;
import javax.imageio.ImageIO;
import org.apache.wicket.markup.html.WebResource;
import org.apache.wicket.util.resource.IResourceStream;
import org.apache.wicket.util.resource.ResourceStreamNotFoundException;
import org.apache.wicket.util.value.ValueMap;
import org.opengis.referencing.crs.CoordinateReferenceSystem;
import com.vividsolutions.jts.geom.Envelope;
/**
* A wicket resource that acts as a mini WMS to generate a map for a
* {@link CoordinateReferenceSystem CRS}'s area of validity.
* <p>
* This resource expects the following parameters in order to generate the area of validity map:
* <ul>
* <li>WIDTH
* <li>HEIGHT
* <li>BBOX
* </ul>
* </p>
*
* @author Gabriel Roldan
*/
public class TestResource extends WebResource {
private static final long serialVersionUID = 1L;
private final CoordinateReferenceSystem crs;
public TestResource(CoordinateReferenceSystem crs) {
this.crs = crs;
}
@Override
public IResourceStream getResourceStream() {
ValueMap parameters = getParameters();
int width = parameters.getInt("WIDTH", 400);
int height = parameters.getInt("HEIGHT", 200);
String bboxStr = parameters.getString("BBOX");
ByteArrayOutputStream output = null;
if (bboxStr != null) {
try {
CRSAreaOfValidityMapBuilder builder = new CRSAreaOfValidityMapBuilder(width, height);
Envelope envelope = parseEnvelope(bboxStr);
RenderedImage image = builder.createMapFor(crs, envelope);
output = new ByteArrayOutputStream();
ImageIO.write(image, "PNG", output);
} catch (Exception e) {
output = null;
e.printStackTrace();
}
}
final byte[] byteArray = output == null ? null : output.toByteArray();
return new ByteArrayResourceStream(byteArray);
}
private Envelope parseEnvelope(String bboxStr) {
String[] split = bboxStr.split(",");
double minx = Double.valueOf(split[0]);
double miny = Double.valueOf(split[1]);
double maxx = Double.valueOf(split[2]);
double maxy = Double.valueOf(split[3]);
return new Envelope(minx, maxx, miny, maxy);
}
private static class ByteArrayResourceStream implements IResourceStream {
private static final long serialVersionUID = 1L;
private final byte[] content;
public ByteArrayResourceStream(final byte[] content) {
this.content = content;
}
public void setLocale(Locale arg0) {
}
public long length() {
return 0;
}
public Locale getLocale() {
return null;
}
public InputStream getInputStream() throws ResourceStreamNotFoundException {
if (content == null) {
throw new ResourceStreamNotFoundException();
}
return new ByteArrayInputStream(content);
}
public String getContentType() {
return "image/png";
}
public void close() throws IOException {
}
public org.apache.wicket.util.time.Time lastModifiedTime() {
return null;
}
}
}