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%2Ftests%2FInstanceOfTest.java;fp=bundles%2Forg.simantics.browsing.ui.model%2Fsrc%2Forg%2Fsimantics%2Fbrowsing%2Fui%2Fmodel%2Ftests%2FInstanceOfTest.java;h=a2c78aded73df959735f9b825cafa885579e4f4c;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/tests/InstanceOfTest.java b/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/tests/InstanceOfTest.java
new file mode 100644
index 000000000..a2c78aded
--- /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;
+
+import org.eclipse.core.runtime.Platform;
+import org.osgi.framework.Bundle;
+import org.simantics.databoard.Bindings;
+import org.simantics.db.ReadGraph;
+import org.simantics.db.Resource;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.viewpoint.ontology.ViewpointResource;
+
+/**
+ * A visual contribution rule test that checks whether the input content is an
+ * instance of a Java class. The class is specified by identifying the source
+ * bundle and the class name.
+ * 
+ * @author Tuukka Lehtonen
+ */
+public class InstanceOfTest implements Test {
+
+    String   bundleName;
+    String   className;
+    Class<?> clazz;
+    boolean  failed;
+
+    public InstanceOfTest(String bundle, String className) {
+        this.bundleName = bundle;
+        this.className = className;
+    }
+
+    public InstanceOfTest(ReadGraph graph, Resource test) throws DatabaseException {
+        ViewpointResource VP = ViewpointResource.getInstance(graph);
+        this.bundleName = graph.getRelatedValue(test, VP.InstanceOfTest_bundleName, Bindings.STRING);
+        this.className = graph.getRelatedValue(test, VP.InstanceOfTest_className, Bindings.STRING);
+    }
+
+    private Class<?> resolveClass() {
+        if (failed)
+            return null;
+        if (clazz != null)
+            return clazz;
+        Bundle b = Platform.getBundle(bundleName);
+        if (b == null) {
+            System.err.println(getClass() + " could not resolve class " + className + ", bundle " + bundleName + " not found in platform");
+            failed = true;
+            return null;
+        }
+        try {
+            this.clazz = b.loadClass(className);
+            return clazz;
+        } catch (ClassNotFoundException e) {
+            System.err.println(getClass() + " could not resolve class " + className + ", from bundle " + bundleName);
+            failed = true;
+            return null;
+        }
+    }
+
+    @Override
+    public boolean isCompatible(Class<?> contentType) {
+        Class<?> clazz = resolveClass();
+        return clazz != null && clazz.equals(contentType);
+    }
+
+    @Override
+    public boolean test(ReadGraph graph, Object content)
+            throws DatabaseException {
+        Class<?> clazz = resolveClass();
+        return clazz != null && clazz.isInstance(content);
+    }
+
+}