public double getPixelSize() {
// default is 0 after initialization,
// so if it is not 0, that means it was already calculated
if (0d == this.pixelSize && null != this.mapSource && null != this.mapSource.getChildren()) {
try {
for (Iterator<MapSource> iterator = this.mapSource.getChildren(); iterator.hasNext(); ) {
MapGenerator gen = null;
MapSource ms = iterator.next();
if (null != ms && null != (gen = ms.getMapGenerator())) {
double d = gen.getPixelSize();
if (0d == this.pixelSize || d < this.pixelSize) this.pixelSize = d;
}
}
} catch (Exception e) {
Logging.logger().fine(e.getMessage());
}
}
return this.pixelSize;
}
public Sector getBBox() {
if (null != this.coverage) return this.coverage;
this.coverage = Sector.EMPTY_SECTOR;
MapSource myMapSource = this.mapSource;
for (Iterator<MapSource> iterator = myMapSource.getChildren(); iterator.hasNext(); ) {
MapSource ms = iterator.next();
try {
MapGenerator gen = (null != ms) ? ms.getMapGenerator() : null;
if (null != gen) {
Sector bbox = gen.getBBox();
if (null != bbox) this.coverage = Sector.union(this.coverage, bbox);
}
} catch (Exception e) {
Logging.logger()
.severe(
"CompoundImageryGenerator:getBBox: undefined coverage of child map source"
+ ms.getName());
}
}
return this.coverage;
}
public ImageFormatter serviceRequest(IMapRequest req) throws IOException, WMSServiceException {
int reqWidth = 512;
int reqHeight = 512;
this.threadId = Thread.currentThread().getId();
MapSource myMapSource = CompoundImageryGenerator.this.mapSource;
Logging.logger()
.info("START CompoundServiceInstance :: serviceRequest( " + myMapSource.getName() + ")");
try {
Integer bgColor = CompoundImageryGenerator.DEFAULT_MISSING_DATA_COLOR;
String bgColorStr = req.getBGColor();
if (bgColorStr != null && 0 < bgColorStr.length()) {
try {
bgColor = Integer.parseInt(bgColorStr, 16);
} catch (NumberFormatException ex) {
Logging.logger()
.severe("Unable to parse BGCOLOR in get imagery request: " + ex.getMessage());
bgColor = CompoundImageryGenerator.DEFAULT_MISSING_DATA_COLOR;
}
} else
Logging.logger()
.severe(
"BGCOLOR was not specified in the getImagery request: using default " + bgColor);
req.setBGColor(bgColor.toString());
reqWidth = (req.getWidth() > 0) ? req.getWidth() : 512;
req.setWidth(reqWidth);
reqHeight = (req.getHeight() > 0) ? req.getHeight() : 512;
req.setHeight(reqHeight);
Sector reqSector =
Sector.fromDegrees(
req.getBBoxYMin(), req.getBBoxYMax(), req.getBBoxXMin(), req.getBBoxXMax());
double reqPixelSize = reqSector.getDeltaLatDegrees() / reqHeight;
MapSource reqMapSource = null;
for (Iterator<MapSource> iterator = myMapSource.getChildren(); iterator.hasNext(); ) {
MapSource ms = iterator.next();
MapGenerator gen = (null != ms) ? ms.getMapGenerator() : null;
if (null == gen) {
Logging.logger()
.severe("child mapSource `" + ms.getName() + "` has no associated map generator!");
continue;
}
Sector bbox = gen.getBBox();
Logging.logger()
.info(
"found child mapSource `" + ms.getName() + "` with generator: " + gen.toString());
if (!reqSector.intersects(bbox)) {
Logging.logger()
.info(
"child mapSource`"
+ ms.getName()
+ "`: out of coverage, skipping"
+ bbox.toString());
continue;
}
double genPixelSize = gen.getPixelSize();
reqMapSource =
ms; // assumes layers are configured in order according to resolutions from low to
// high
Logging.logger()
.info(
"Comparing texel sizes: req = "
+ reqPixelSize
+ " , layer's = "
+ gen.getPixelSize());
if (reqPixelSize >= genPixelSize) {
// satisfactory generator found
break;
}
}
ImageFormatter fmt = null;
if (null != reqMapSource) {
try {
MapGenerator gen = reqMapSource.getMapGenerator();
Logging.logger()
.info(
"`"
+ reqMapSource.getName()
+ "` is executing request; req texel size = "
+ reqPixelSize
+ " where layer's texel size = "
+ gen.getPixelSize());
fmt = gen.getServiceInstance().serviceRequest(req);
} catch (Exception ex) {
Logging.logger().severe("Error while accessing a child mapSource: " + ex.getMessage());
}
}
if (null == fmt) {
Logging.logger().info("CompoundImageryGenerator will return an empty transparent image");
fmt = createEmptyImage(req.getWidth(), req.getHeight(), new Color(bgColor));
}
return fmt;
} catch (Exception ex) {
String msg = Logging.getMessage("WMS.RequestFailed", ex.getMessage());
Logging.logger().log(java.util.logging.Level.SEVERE, msg, ex);
throw new WMSServiceException(msg);
}
}