Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.browsing.ui.model / src / org / simantics / browsing / ui / model / tests / InstanceOfTest.java

diff --git a/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/tests/InstanceOfTest.java b/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/tests/InstanceOfTest.java
new file mode 100644 (file)
index 0000000..a2c78ad
--- /dev/null
+++ b/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/tests/InstanceOfTest.java
@@ -0,0 +1,70 @@
+package org.simantics.browsing.ui.model.tests;\r
+\r
+import org.eclipse.core.runtime.Platform;\r
+import org.osgi.framework.Bundle;\r
+import org.simantics.databoard.Bindings;\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.viewpoint.ontology.ViewpointResource;\r
+\r
+/**\r
+ * A visual contribution rule test that checks whether the input content is an\r
+ * instance of a Java class. The class is specified by identifying the source\r
+ * bundle and the class name.\r
+ * \r
+ * @author Tuukka Lehtonen\r
+ */\r
+public class InstanceOfTest implements Test {\r
+\r
+    String   bundleName;\r
+    String   className;\r
+    Class<?> clazz;\r
+    boolean  failed;\r
+\r
+    public InstanceOfTest(String bundle, String className) {\r
+        this.bundleName = bundle;\r
+        this.className = className;\r
+    }\r
+\r
+    public InstanceOfTest(ReadGraph graph, Resource test) throws DatabaseException {\r
+        ViewpointResource VP = ViewpointResource.getInstance(graph);\r
+        this.bundleName = graph.getRelatedValue(test, VP.InstanceOfTest_bundleName, Bindings.STRING);\r
+        this.className = graph.getRelatedValue(test, VP.InstanceOfTest_className, Bindings.STRING);\r
+    }\r
+\r
+    private Class<?> resolveClass() {\r
+        if (failed)\r
+            return null;\r
+        if (clazz != null)\r
+            return clazz;\r
+        Bundle b = Platform.getBundle(bundleName);\r
+        if (b == null) {\r
+            System.err.println(getClass() + " could not resolve class " + className + ", bundle " + bundleName + " not found in platform");\r
+            failed = true;\r
+            return null;\r
+        }\r
+        try {\r
+            this.clazz = b.loadClass(className);\r
+            return clazz;\r
+        } catch (ClassNotFoundException e) {\r
+            System.err.println(getClass() + " could not resolve class " + className + ", from bundle " + bundleName);\r
+            failed = true;\r
+            return null;\r
+        }\r
+    }\r
+\r
+    @Override\r
+    public boolean isCompatible(Class<?> contentType) {\r
+        Class<?> clazz = resolveClass();\r
+        return clazz != null && clazz.equals(contentType);\r
+    }\r
+\r
+    @Override\r
+    public boolean test(ReadGraph graph, Object content)\r
+            throws DatabaseException {\r
+        Class<?> clazz = resolveClass();\r
+        return clazz != null && clazz.isInstance(content);\r
+    }\r
+\r
+}\r