Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.diagram / src / org / simantics / diagram / flag / FlagPropertyTester.java

diff --git a/bundles/org.simantics.diagram/src/org/simantics/diagram/flag/FlagPropertyTester.java b/bundles/org.simantics.diagram/src/org/simantics/diagram/flag/FlagPropertyTester.java
new file mode 100644 (file)
index 0000000..67b5808
--- /dev/null
+++ b/bundles/org.simantics.diagram/src/org/simantics/diagram/flag/FlagPropertyTester.java
@@ -0,0 +1,120 @@
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ *     VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.diagram.flag;\r
+\r
+import org.eclipse.core.expressions.PropertyTester;\r
+import org.simantics.DatabaseJob;\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.Session;\r
+import org.simantics.db.common.request.UniqueRead;\r
+import org.simantics.db.common.utils.RequestUtil;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.ui.SimanticsUI;\r
+import org.simantics.ui.utils.ResourceAdaptionUtils;\r
+\r
+/**\r
+ * An Eclipse property tester for flag elements.\r
+ * \r
+ * @author Tuukka Lehtonen\r
+ */\r
+public class FlagPropertyTester extends PropertyTester {\r
+\r
+    /**\r
+     * Tests if the received flag resource is connected to a counterpart.\r
+     * Default expected value is true.\r
+     */\r
+    private static final String CONNECTED = "connected";\r
+\r
+    /**\r
+     * Tests if the received flag resource is connected to a counterpart.\r
+     * Default expected value is true.\r
+     */\r
+    private static final String LOCALLY_CONNECTED = "locallyConnected";\r
+\r
+    /**\r
+     * Tests if the received flag resource is marked as an external flag.\r
+     */\r
+    private static final String EXTERNAL = "external";\r
+\r
+    /**\r
+     * Tests if the received flag resource is a merged flag with more than 1\r
+     * counterpart.\r
+     */\r
+    private static final String MERGED = "merged";\r
+\r
+    @Override\r
+    public boolean test(Object receiver, final String property, final Object[] args, final Object expectedValue) {\r
+        final Resource resource = ResourceAdaptionUtils.toSingleResource(receiver);\r
+        if (resource == null)\r
+            return false;\r
+\r
+        Session session = SimanticsUI.peekSession();\r
+        if (session == null)\r
+            return false;\r
+\r
+        if (DatabaseJob.inProgress())\r
+            return false;\r
+\r
+        try {\r
+            return RequestUtil.trySyncRequest(\r
+                    session,\r
+                    SimanticsUI.UI_THREAD_REQUEST_START_TIMEOUT,\r
+                    SimanticsUI.UI_THREAD_REQUEST_EXECUTION_TIMEOUT,\r
+                    false,\r
+                    new UniqueRead<Boolean>() {\r
+                @Override\r
+                public Boolean perform(ReadGraph g) throws DatabaseException {\r
+                    return Boolean.valueOf(doTest(g, resource, property, args, expectedValue));\r
+                }\r
+            });\r
+        } catch (DatabaseException | InterruptedException e) {\r
+            // Purposefully not logging these exceptions, there might be way too\r
+            // many even under normal circumstances.\r
+            // TODO: add debug tracing options controlling the printing of these exceptions\r
+            return false;\r
+        }\r
+    }\r
+\r
+    private boolean doTest(ReadGraph graph, Resource resource, String property, Object[] args, Object expectedValue) throws DatabaseException {\r
+        if (EXTERNAL.equals(property)) {\r
+            boolean expected = parseBoolean(expectedValue, true);\r
+            boolean ext = FlagUtil.isExternal(graph, resource);\r
+            return ext ? expected : expected;\r
+        } else if (CONNECTED.equals(property)) {\r
+            boolean expected = parseBoolean(expectedValue, true);\r
+            boolean isConnected = \r
+                FlagUtil.countCounterparts(graph, resource) > 0 ||\r
+                FlagUtil.isLifted(graph, resource);\r
+            return isConnected == expected;\r
+        } else if (LOCALLY_CONNECTED.equals(property)) {\r
+            boolean expected = parseBoolean(expectedValue, true);\r
+            boolean isLocallyConnected = \r
+                FlagUtil.isJoinedInSingleDiagram(graph, resource);\r
+            return isLocallyConnected == expected;\r
+        } else if (MERGED.equals(property)) {\r
+            boolean expected = parseBoolean(expectedValue, true);\r
+            boolean isMerged = FlagUtil.countCounterparts(graph, resource) > 1;\r
+            return isMerged == expected;\r
+        }\r
+        return false;\r
+    }\r
+\r
+    boolean parseBoolean(Object value, boolean defaultValue) {\r
+        if (value instanceof Boolean)\r
+            return (Boolean) value;\r
+        if (value instanceof String)\r
+            return Boolean.parseBoolean((String) value);\r
+        return defaultValue;\r
+    }\r
+\r
+}\r