This is an example how to make it easier to response the extensions from the OsiamController

ExtensionMap

import org.osiam.resources.scim.ExtensionFieldType;

import java.util.HashMap;
import java.util.Map;

public class ExtensionMap {

    private String urn;

    private Map<String, String> namedTypePairs = new HashMap<>();

    public ExtensionMap(String urn) {
        this.urn = urn;
    }

    public String getUrn() {
        return urn;
    }

    public void setUrn(String urn) {
        this.urn = urn;
    }

    public Map<String, String> getNamedTypePairs() {
        return namedTypePairs;
    }

    public void setNamedTypePairs(Map<String, String> namedTypePairs) {
        this.namedTypePairs = namedTypePairs;
    }

    public void addPair(String fieldName, ExtensionFieldType type) {
        namedTypePairs.put(fieldName, type.getName());
    }
}

OsiamController#getExtensions

public List<ExtensionMap> getExtensions() {
    List<Extension> extensions = fromEntity(dao.getAllExtensions());
    final List<ExtensionMap> extensionMaps = new ArrayList<>();
    for(Extension extension : extensions) {
        final ExtensionMap extensionMap = new ExtensionMap(extension.getUrn());
        for(Map.Entry<String, Extension.Field> fieldEntry : extension.getFields().entrySet()){
            final String field = fieldEntry.getKey();
            final ExtensionFieldType type = fieldEntry.getValue().getType();
            extensionMap.addPair(field, type);
        }
        extensionMaps.add(extensionMap);
    }
    return extensionMaps;
}