/**
* Blocking operation to resolve into the adaptee, if available.
*
* <p>Required adaptions:
*
* <ul>
* <li>GeoResource.class - this
* <li>IGeoResourceInfo.class - getInfo( monitor ) ie about this handles contents
* <li>IService.class - service( monitor ) ie that is responsible for this GeoResource
* </ul>
*
* <p>Example Use (no casting required!):
*
* <pre>
* <code>
* IGeoResourceInfo info = resolve(IGeoResourceInfo.class);
* </code>
* </pre>
*
* <p>Recommended adaptions:
*
* <ul>
* <li>ImageDescriptor.class (for icon provided by external service)
* <li>List.class - members( monitor ) ie children of this georesource as in the wms layer case
* </ul>
*
* @param adaptee
* @param monitor
* @return instance of adaptee, or null if unavailable (IGeoResourceInfo and IService must be
* supported)
* @see IGeoResourceInfo
* @see IService
* @see IResolve#resolve(Class, IProgressMonitor)
*/
public <T> T resolve(Class<T> adaptee, IProgressMonitor monitor) throws IOException {
if (monitor == null) monitor = new NullProgressMonitor();
if (adaptee == null) {
throw new NullPointerException("No adaptor specified"); // $NON-NLS-1$
}
if (adaptee.isAssignableFrom(IGeoResourceInfo.class)) {
return adaptee.cast(getInfo(monitor));
}
if (adaptee.isAssignableFrom(IService.class)) {
return adaptee.cast(service(monitor));
}
if (adaptee.isAssignableFrom(IServiceInfo.class)) {
try {
monitor.beginTask("service info", 100); // $NON-NLS-1$
IService service = service(new SubProgressMonitor(monitor, 40));
if (service != null) {
IServiceInfo info = service.getInfo(new SubProgressMonitor(monitor, 60));
return adaptee.cast(info);
}
} finally {
monitor.done();
}
}
if (adaptee.isAssignableFrom(IGeoResource.class)) {
monitor.done();
return adaptee.cast(this);
}
if (adaptee.isAssignableFrom(getClass())) {
return adaptee.cast(this);
}
IResolveManager rm = CatalogPlugin.getDefault().getResolveManager();
if (rm.canResolve(this, adaptee)) {
return rm.resolve(this, adaptee, monitor);
}
return null; // no adapter found (check to see if ResolveAdapter is registered?)
}
