1 package org.simantics.browsing.ui.model.browsecontexts;
3 import java.util.Collection;
5 import org.simantics.browsing.ui.BuiltinKeys;
6 import org.simantics.browsing.ui.NodeContext;
7 import org.simantics.browsing.ui.model.actions.ActionBrowseContext;
8 import org.simantics.db.ReadGraph;
9 import org.simantics.db.Resource;
10 import org.simantics.db.common.request.PossibleIndexRoot;
11 import org.simantics.db.common.request.UnaryRead;
12 import org.simantics.db.exception.DatabaseException;
13 import org.simantics.db.layer0.variable.Variable;
15 public class ResolveActionBrowseContext extends UnaryRead<NodeContext,ActionBrowseContext> {
17 public ResolveActionBrowseContext(NodeContext parameter) {
21 private Resource getPossibleResource(ReadGraph graph) throws DatabaseException {
22 Object input = parameter.getConstant(BuiltinKeys.INPUT);
23 if(input instanceof Resource) return (Resource)input;
24 else if (input instanceof Variable) return ((Variable)input).getPossibleRepresents(graph);
28 private String getPossibleUIContext() {
29 return parameter.getConstant(BuiltinKeys.UI_CONTEXT);
33 public ActionBrowseContext perform(ReadGraph graph) throws DatabaseException {
35 Resource resource = getPossibleResource(graph);
36 if(resource == null) return null;
38 Resource indexRoot = graph.syncRequest(new PossibleIndexRoot(resource));
39 if(indexRoot == null) return null;
41 Collection<Resource> contexts = graph.syncRequest(new ContributedActionBrowseContexts(indexRoot, resource, getPossibleUIContext()));
43 if(contexts.isEmpty()) return null;
45 return graph.syncRequest(new ActionBrowseContextRequest(contexts));