Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.browsing.ui.model / src / org / simantics / browsing / ui / model / modifiers / VariableModifier2.java

diff --git a/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/modifiers/VariableModifier2.java b/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/modifiers/VariableModifier2.java
new file mode 100644 (file)
index 0000000..d063790
--- /dev/null
+++ b/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/modifiers/VariableModifier2.java
@@ -0,0 +1,132 @@
+/*******************************************************************************\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.browsing.ui.model.modifiers;\r
+\r
+import org.simantics.browsing.ui.common.ErrorLogger;\r
+import org.simantics.browsing.ui.content.Labeler.Modifier;\r
+import org.simantics.databoard.Bindings;\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.RequestProcessor;\r
+import org.simantics.db.Session;\r
+import org.simantics.db.common.request.ReadRequest;\r
+import org.simantics.db.common.utils.Logger;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.db.layer0.variable.InputValidator;\r
+import org.simantics.db.layer0.variable.Variable;\r
+import org.simantics.db.layer0.variable.VariableWrite;\r
+import org.simantics.db.layer0.variable.Variables;\r
+import org.simantics.scl.runtime.function.Function1;\r
+import org.simantics.utils.datastructures.Callback;\r
+\r
+/**\r
+ * @author Tuukka Lehtonen\r
+ */\r
+public class VariableModifier2 implements Modifier {\r
+\r
+    final protected Session     session;\r
+    final protected Variable    variable;\r
+\r
+    private String              initialValue;\r
+    protected Throwable         modifierFailed;\r
+    protected InputValidator    variableInputValidator;\r
+\r
+    public VariableModifier2(RequestProcessor processor, Variable variable) {\r
+        this.variable = variable;\r
+        this.session = processor.getSession();\r
+        initializeModifier(processor);\r
+    }\r
+\r
+    protected void initializeModifier(RequestProcessor processor) {\r
+       \r
+        try {\r
+               \r
+            processor.syncRequest(new ReadRequest() {\r
+                @Override\r
+                public void run(ReadGraph graph) throws DatabaseException {\r
+                    initialValue = getInitialValue(graph);\r
+                    initializeValidator(graph, variable);\r
+                }\r
+            });\r
+            \r
+        } catch (DatabaseException e) {\r
+            Logger.defaultLogError("Modifier initialization failed, see exception for details.", e);\r
+            modifierFailed = e;\r
+        }\r
+        \r
+    }\r
+\r
+    protected void initializeValidator(ReadGraph graph, Variable var) throws DatabaseException {\r
+       \r
+//     Resource validator = variable.getPossiblePropertyValue(graph, Variables.INPUT_VALIDATOR);\r
+//     if(validator != null) {\r
+//             variableInputValidator = graph.getPossibleContextualAdapter(validator, variable, Variable.class, InputValidator.class);\r
+//     }\r
+       \r
+        final Function1<String, String> validator = variable.getPossiblePropertyValue(graph, Variables.INPUT_VALIDATOR);\r
+        if (validator != null)\r
+            variableInputValidator = new InputValidator() {\r
+                \r
+                @Override\r
+                public String isValid(Object newValue) {\r
+                    return validator.apply((String)newValue);\r
+                }\r
+            };\r
+       \r
+        \r
+    }\r
+\r
+    protected void doModify(final String label) {\r
+        session.asyncRequest(new VariableWrite(variable, label), new Callback<DatabaseException>() {\r
+            @Override\r
+            public void run(DatabaseException parameter) {\r
+                if (parameter != null)\r
+                    ErrorLogger.defaultLogError(parameter);\r
+                else\r
+                       modifySuccessful();\r
+            }\r
+        });\r
+    }\r
+\r
+    protected void modifySuccessful() {\r
+       }\r
+\r
+    protected String getInitialValue(ReadGraph graph) throws DatabaseException {\r
+       return variable.getValue(graph, Bindings.STRING);\r
+    }\r
+\r
+    @Override\r
+    public String getValue() {\r
+        return initialValue;\r
+    }\r
+\r
+    @Override\r
+    public String isValid(String label) {\r
+       \r
+        if (modifierFailed != null)\r
+            return "Could not resolve validator for this value, modification denied. Reason: " + modifierFailed.getMessage();\r
+\r
+        if (variableInputValidator != null)\r
+            return variableInputValidator.isValid(label);\r
+\r
+        return null;\r
+        \r
+    }\r
+\r
+    @Override\r
+    public final void modify(String label) {\r
+        if (modifierFailed != null)\r
+            // Should never end up here, isValid should prevent it.\r
+            throw new Error("modifier failed: " + modifierFailed.getMessage());\r
+        doModify(label);\r
+    }\r
+\r
+};\r