topic Re: Non-deprecated way to access IRaster in Java SOE? in ArcObjects SDK Questions

Non-deprecated way to access IRaster in Java SOE?

EricRussell — Wed, 10 Apr 2013 00:41:26 GMT

As far as I can tell, the only way to get an IRaster from an IMapServerDataAccess in a Java Server Object Extension is to create a new com.esri.arcgis.datasourcesraster.Raster, like this:

[indent]
IMapServerDataAccess dataAccess = (IMapServerDataAccess)mapServer;
return new Raster(dataAccess.getDataSource(mapServer.getDefaultMapName(), 0));
[/indent]

This works, but the one-argument constructor for Raster is deprecated. Is there a non-deprecated way to get the data source as an IRaster?

Re: Non-deprecated way to access IRaster in Java SOE?

LeoDonahue — Wed, 10 Apr 2013 13:46:21 GMT

Hey Eric,

The IMapServerDataAccess Interface docs indicate that getDataSource(String mapName, int layerID) returns one of the following:

Get Data Source
This function allows fine-grained object access to a FeatureLayer, a RasterLayer or a StandaloneTable by returning IFeatureClass, IRaster or ITable respectively. If the layer or standalone table has any joins, the returned object will not contain the joined portion. In addition any field visibility or field alias set to the layer in the source map document will be ignored as it returns the underlying data source.

And, the Raster class docs indicate that even though the method you used is deprecated, that you can simply cast the object to Raster.

Re: Non-deprecated way to access IRaster in Java SOE?

EricRussell — Wed, 10 Apr 2013 14:10:10 GMT

Hi Leo,

The documentation certainly seems to indicate that the result of getDataSource can be cast directly to an IRaster or IFeatureClass, but that's actually not the case. The getDataSource method returns a com.esri.arcgis.interop.RemoteObjRef, which can't be cast to an IRaster or IFeatureClass. You have to wrap in in a call to new FeatureClass(Object) or new Raster(Object). This isn't in the documentation, but it is in the sample code.

Eric

Re: Non-deprecated way to access IRaster in Java SOE?

LeoDonahue — Wed, 10 Apr 2013 14:26:19 GMT

Just so I can compare apples to apples, what is your layer 0? A mosaic? A raster catalog? Something else?

Re: Non-deprecated way to access IRaster in Java SOE?

EricRussell — Wed, 10 Apr 2013 16:27:06 GMT

It's just a regular raster layer, displaying an 8-bit unsigned file geodatabase raster dataset of flow direction data.

Re: Non-deprecated way to access IRaster in Java SOE?

LeoDonahue — Sat, 11 Dec 2021 13:45:15 GMT

Ok, if regular Raster layer, then can't you do this:

RasterLayer rl = (RasterLayer) mapServer.getLayer("Layers", 0);
System.out.println(rl.getSpatialReference().getName());
System.out.println(rl.getFilePath());

Re: Non-deprecated way to access IRaster in Java SOE?

EricRussell — Thu, 11 Apr 2013 00:27:30 GMT

That may work. I'll give it a try when I'm back in the office tomorrow. But I was under the impression that you can't use the getLayer method from an SOE at all as of 10.1, because it's not supported on optimized map services (see, for example, http://blogs.esri.com/esri/arcgis/2010/11/12/accessing-optimized-map-services-with-server-object-extensions/ and http://blogs.esri.com/esri/arcgis/2011/11/15/whats-new-for-java-server-object-extension-builders/).

Re: Non-deprecated way to access IRaster in Java SOE?

LeoDonahue — Thu, 11 Apr 2013 13:28:10 GMT

But I was under the impression that you can't use the getLayer method from an SOE at all as of 10.1, because it's not supported on optimized map services

Did you tell anyone in the original post you were using 10.1 with optimized map services? No.

I was going to remind you where to go from IRasterLayer, but it doesn't matter now.

A Raster can be created in three ways:
1. Get from a RasterLayer using IRasterLayer::Raster
2. Create from a raster dataset using either :IRasterDataset::CreateDefaultRaster or IRasterDataset2::CreateFullRaster
3. Cocreate a Raster and append raster bands using IRasterBandCollection interface.

Re: Non-deprecated way to access IRaster in Java SOE?

EricRussell — Thu, 11 Apr 2013 14:26:32 GMT

Sorry, I thought it was implied by the fact that I was using IMapServerDataAccess. As of 10.1, all map services are optimized map services, so you have to use IMapServerDataAccess to access map data from an SOE.

Just to be sure, I tried using getLayer(String,int) and it fails with an AutomationException (no such interface supported).

Thanks,
Eric

Re: Non-deprecated way to access IRaster in Java SOE?

LeoDonahue — Thu, 11 Apr 2013 15:54:27 GMT

Well, I'm out of options. Not being on 10.1 doesn't help me help you either.

Since the 10.1 samples show this:

  FeatureClass fc = new FeatureClass(this.mapServerDataAccess.getDataSource(mapName, layerId));

It stands to reason that one could do this... I guess not though.

 IRaster raster = this.mapServerDataAccess.getDataSource(mapName, layerId);

If getDataSource on IMapServerDataAccess doesn't do this,

This function allows fine-grained object access to a FeatureLayer, a RasterLayer or a StandaloneTable by returning IFeatureClass, IRaster or ITable respectively.

then maybe we need to report it?