Best way to save a WMS layer after loading it

[Anthra]

Hi,

I load some layers from WMS server and I use the technic of WMSLayerManager (Getting capabilities and then call a factory to make a layer of it).

This works fine but I'm at a point where I want to make these layers persistent between two usages of my application.

I was wondering if there is a way already defined to save a layer (converting properties needed under an xml or something like that). If not, what should be saved? Only capabilities?

For now I'm just saving layer name and server URI but then I need network to get all capabilities. The problem is that I want these layers to work offline using cache and I can't build the layer without all capabilities.

So can you give me some advice or way of research for me to make the job?

Thanks in advance,

Anthra

[nlneilson]

Take one of the WMS layers in the SDK and modify it for the data you want.
It's a bit complicated to code just starting.

The data needs to be installed in your cache Also their is a read and write location, usually the same but the write is checked first then the read, if the data is not found then it will hit a server.

Start with a layer that works.

[Anthra]

Thanks for your advices.

After some further investigations and test I can generate the XML, at least partially doing this:

WMSCapabilities wmsc = defaultListModel.get(i).getCaps();
AVList params = defaultListModel.get(i).getParams();
                    
String[] formatOrderPreference = new String[]
{
    "image/dds", "image/png", "image/jpeg"
};
AVList configParams = DataConfigurationUtils.getWMSLayerConfigParams(wmsc, formatOrderPreference, params);

Document doc = WMSTiledImageLayer.createTiledImageLayerConfigDocument(configParams);
try {
    printDocument(doc, System.out);
} catch (IOException ex) {
    ...
} catch (TransformerException ex) {
    ...
}

That produce the following document:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<Layer layerType="TiledImageLayer" version="1">
    <DisplayName>Ortofotografía Rigurosa Color de Andalucía 2008-2009</DisplayName>
    <DatasetName>OCA10_2009</DatasetName>
    <DataCacheName>www.ideandalucia.es\_wms_ortofoto2009\OCA10_2009</DataCacheName>
    <Service serviceName="OGC:WMS">
        <URL>http://www.ideandalucia.es/wms/ortofoto2009?service=wms&amp;</URL>
    </Service>
    <Sector>
        <SouthWest>
            <LatLon latitude="35.9471" longitude="-7.58724" units="degrees"/>
        </SouthWest>
        <NorthEast>
            <LatLon latitude="38.7485" longitude="-1.60187" units="degrees"/>
        </NorthEast>
    </Sector>
    <ImageFormat>image/jpeg</ImageFormat>
</Layer>

I've not tested yet to use this document, I'll give you update of progress.

[tag]

TiledImageLayer implements Restorable. Will that help you?

[Anthra]

I didn't think about that, I'll give it a try. Thx tag.

For the begin of solution I gave, that's not fully correct, for example layer name is stored in DatasetName so when rebuilding the layer and when the request is build the layername is not found.

[Anthra]

It works like a charm! I never did take a look a this mechanism, that is simple and powerful! Thanks a lot for your help.