Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.browsing.ui.model / src / org / simantics / browsing / ui / model / browsecontexts / ResolveBrowseContext.java

diff --git a/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/browsecontexts/ResolveBrowseContext.java b/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/browsecontexts/ResolveBrowseContext.java
new file mode 100644 (file)
index 0000000..480e311
--- /dev/null
+++ b/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/browsecontexts/ResolveBrowseContext.java
@@ -0,0 +1,48 @@
+package org.simantics.browsing.ui.model.browsecontexts;\r
+\r
+import java.util.Collection;\r
+\r
+import org.simantics.browsing.ui.BuiltinKeys;\r
+import org.simantics.browsing.ui.NodeContext;\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.common.request.PossibleIndexRoot;\r
+import org.simantics.db.common.request.UnaryRead;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.db.layer0.variable.Variable;\r
+\r
+public class ResolveBrowseContext extends UnaryRead<NodeContext,BrowseContext> {\r
+\r
+    public ResolveBrowseContext(NodeContext parameter) {\r
+        super(parameter);\r
+    }\r
+\r
+    private Resource getPossibleResource(ReadGraph graph) throws DatabaseException {\r
+        Object input = parameter.getConstant(BuiltinKeys.INPUT);\r
+        if(input instanceof Resource) return (Resource)input;\r
+        else if (input instanceof Variable) return ((Variable)input).getPossibleRepresents(graph);\r
+        else return null;\r
+    }\r
+    \r
+    private String getPossibleUIContext() {\r
+        return parameter.getConstant(BuiltinKeys.UI_CONTEXT);\r
+    }\r
+    \r
+    @Override\r
+    public BrowseContext perform(ReadGraph graph) throws DatabaseException {\r
+        \r
+        Resource resource = getPossibleResource(graph);\r
+        if(resource == null) return null;\r
+        \r
+        Resource indexRoot = graph.syncRequest(new PossibleIndexRoot(resource));\r
+        if(indexRoot == null) return null;\r
+        \r
+        Collection<Resource> contexts = graph.syncRequest(new ContributedBrowseContexts(indexRoot, resource, getPossibleUIContext()));\r
+        \r
+        if(contexts.isEmpty()) return null;\r
+        \r
+        return graph.syncRequest(new BrowseContextRequest(contexts));\r
+        \r
+    }\r
+\r
+}\r