Preliminary support for purely Variable based dynamic issue sources

[simantics/platform.git] / bundles / org.simantics.issues.ui / src / org / simantics / issues / ui / DynamicIssueSourceHierarchyRule.java

diff --git a/bundles/org.simantics.issues.ui/src/org/simantics/issues/ui/DynamicIssueSourceHierarchyRule.java b/bundles/org.simantics.issues.ui/src/org/simantics/issues/ui/DynamicIssueSourceHierarchyRule.java
new file mode 100644 (file)
index 0000000..0e61209
--- /dev/null
+++ b/bundles/org.simantics.issues.ui/src/org/simantics/issues/ui/DynamicIssueSourceHierarchyRule.java
@@ -0,0 +1,34 @@
+package org.simantics.issues.ui;
+
+import java.util.Collection;
+import java.util.Collections;
+
+import org.simantics.browsing.ui.model.children.ChildRule;
+import org.simantics.db.ReadGraph;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.db.layer0.variable.Variable;
+
+/**
+ * @author Tuukka Lehtonen
+ * @since 1.27
+ */
+public class DynamicIssueSourceHierarchyRule implements ChildRule {
+
+    @Override
+    public boolean isCompatible(Class<?> contentType) {
+        return contentType.equals(Variable.class);
+    }
+
+    @Override
+    public Collection<?> getChildren(ReadGraph graph, Object parent) throws DatabaseException {
+        Variable v = (Variable) parent;
+        return v.getChildren(graph);
+    }
+
+    @Override
+    public Collection<?> getParents(ReadGraph graph, Object child) throws DatabaseException {
+        Variable parent = ((Variable)child).getParent(graph);
+        return parent != null ? Collections.singleton(parent) : Collections.emptyList();
+    }
+
+}