X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.browsing.ui.model%2Fsrc%2Forg%2Fsimantics%2Fbrowsing%2Fui%2Fmodel%2Fqueries%2FIsNodeContextRemovable.java;fp=bundles%2Forg.simantics.browsing.ui.model%2Fsrc%2Forg%2Fsimantics%2Fbrowsing%2Fui%2Fmodel%2Fqueries%2FIsNodeContextRemovable.java;h=5097f5194f750501699799c1dcdc900cbb821a36;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git

diff --git a/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/queries/IsNodeContextRemovable.java b/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/queries/IsNodeContextRemovable.java
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+++ b/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/queries/IsNodeContextRemovable.java
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+/*******************************************************************************
+ * Copyright (c) 2015 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     Semantum Oy - initial API and implementation
+ *******************************************************************************/
+package org.simantics.browsing.ui.model.queries;
+
+import java.util.Collections;
+
+import org.simantics.browsing.ui.BuiltinKeys;
+import org.simantics.browsing.ui.NodeContext;
+import org.simantics.browsing.ui.model.actions.ActionBrowseContext;
+import org.simantics.browsing.ui.model.browsecontexts.ActionBrowseContextRequest;
+import org.simantics.db.ReadGraph;
+import org.simantics.db.Resource;
+import org.simantics.db.common.procedure.adapter.TransientCacheAsyncListener;
+import org.simantics.db.common.request.Queries;
+import org.simantics.db.common.request.UnaryRead;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.db.layer0.adapter.Remover;
+import org.simantics.project.ontology.ProjectResource;
+
+/**
+ * @author Tuukka Lehtonen
+ * @since 1.18.1
+ */
+public class IsNodeContextRemovable extends UnaryRead<NodeContext, Boolean> {
+
+    public IsNodeContextRemovable(NodeContext context) {
+        super(context);
+    }
+
+    @Override
+    public Boolean perform(ReadGraph graph) throws DatabaseException {
+        boolean result = false;
+        try {
+            ActionBrowseContext defaultContext = graph.syncRequest(
+                    new ActionBrowseContextRequest(Collections.singleton(ProjectResource.getInstance(graph).ProjectActionContext)),
+                    TransientCacheAsyncListener.<ActionBrowseContext>instance());
+            ActionBrowseContext browseContext = ActionBrowseContext.get(graph, parameter, defaultContext);
+            if (browseContext != null && !browseContext.canRemove(graph, parameter))
+                return false;
+            result = true;
+        } catch (DatabaseException e) {
+            return false;
+        }
+
+        Object input = parameter.getConstant(BuiltinKeys.INPUT);
+        if (result && input instanceof Resource) {
+            Remover remover = graph.syncRequest(Queries.adapt((Resource) input, Remover.class, true));
+            if (remover != null)
+                return remover.canRemove(graph, null) == null;
+        }
+        return result;
+    }
+
+}