Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.browsing.ui.graph.impl / src / org / simantics / browsing / ui / graph / impl / EnumerationVariableModifier2.java

diff --git a/bundles/org.simantics.browsing.ui.graph.impl/src/org/simantics/browsing/ui/graph/impl/EnumerationVariableModifier2.java b/bundles/org.simantics.browsing.ui.graph.impl/src/org/simantics/browsing/ui/graph/impl/EnumerationVariableModifier2.java
new file mode 100644 (file)
index 0000000..18fd778
--- /dev/null
+++ b/bundles/org.simantics.browsing.ui.graph.impl/src/org/simantics/browsing/ui/graph/impl/EnumerationVariableModifier2.java
@@ -0,0 +1,158 @@
+/*******************************************************************************\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.graph.impl;\r
+\r
+import java.util.ArrayList;\r
+import java.util.Collections;\r
+import java.util.HashSet;\r
+import java.util.List;\r
+import java.util.Set;\r
+\r
+import org.simantics.browsing.ui.content.Labeler.EnumerationModifier;\r
+import org.simantics.databoard.Bindings;\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.RequestProcessor;\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.Session;\r
+import org.simantics.db.UndoContext;\r
+import org.simantics.db.VirtualGraph;\r
+import org.simantics.db.WriteGraph;\r
+import org.simantics.db.common.request.ObjectsWithType;\r
+import org.simantics.db.common.request.WriteRequest;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.db.layer0.variable.Variable;\r
+import org.simantics.db.layer0.variable.Variables;\r
+import org.simantics.db.request.Read;\r
+import org.simantics.layer0.Layer0;\r
+import org.simantics.utils.datastructures.Callback;\r
+import org.simantics.utils.ui.ErrorLogger;\r
+\r
+/**\r
+ * @author Tuukka Lehtonen\r
+ */\r
+public class EnumerationVariableModifier2 implements EnumerationModifier {\r
+\r
+    protected final Session      session;\r
+    protected final UndoContext  undoContext;\r
+    protected final Variable     variable;\r
+    protected final Set<String> allowedValues;\r
+    protected final String       defaultValue;\r
+\r
+    protected Throwable        modifierFailed;\r
+\r
+    public EnumerationVariableModifier2(RequestProcessor processor, UndoContext undoContext, Variable variable) {\r
+\r
+       this.session = processor.getSession();\r
+        this.undoContext = undoContext;\r
+        this.variable = variable;\r
+        this.allowedValues = computeAllowedValues(processor, variable);\r
+        this.defaultValue = computeDefaultValue(processor, variable);\r
+        \r
+    }\r
+\r
+    protected String computeDefaultValue(RequestProcessor processor, final Variable variable) {\r
+        try {\r
+           return processor.syncRequest(new Read<String>() {\r
+                @Override\r
+                public String perform(ReadGraph graph) throws DatabaseException {\r
+                       return variable.getPossiblePropertyValue(graph, Variables.LABEL);\r
+                }\r
+            });\r
+        } catch (DatabaseException e) {\r
+            return "";\r
+        }\r
+    }\r
+    \r
+    protected Set<String> computeAllowedValues(RequestProcessor processor, final Variable variable) {\r
+        try {\r
+           return processor.syncRequest(new Read<Set<String>>() {\r
+                @Override\r
+                public Set<String> perform(ReadGraph graph) throws DatabaseException {\r
+\r
+                       Layer0 L0 = Layer0.getInstance(graph);\r
+                       Set<String> result = new HashSet<String>();\r
+                       Resource literal = variable.getPossibleRepresents(graph);\r
+                       Resource type = graph.getSingleObject(literal, L0.PartOf);\r
+                       for(Resource lit : graph.syncRequest(new ObjectsWithType(type, L0.ConsistsOf, type))) {\r
+                               String label = graph.getPossibleRelatedValue(lit, L0.HasLabel);\r
+                               if(label == null) label = graph.getRelatedValue(lit, L0.HasName);\r
+                               result.add(label);\r
+                       }\r
+                       return result;\r
+                       \r
+                }\r
+            });\r
+        } catch (DatabaseException e) {\r
+            return Collections.emptySet();\r
+        }\r
+    }\r
+\r
+    public class Write extends WriteRequest {\r
+\r
+        final private Variable variable;\r
+        final private String label;\r
+\r
+        public Write(Variable variable, String label) {\r
+            super((VirtualGraph)null);\r
+            this.variable = variable;\r
+            this.label = label;\r
+        }\r
+\r
+        @Override\r
+        public void perform(WriteGraph graph) throws DatabaseException {\r
+               variable.setValue(graph, label, Bindings.STRING);\r
+        }\r
+\r
+    }\r
+    \r
+    protected void doModify(final String label) {\r
+        session.asyncRequest(new Write(variable, label),\r
+                new Callback<DatabaseException>() {\r
+            @Override\r
+            public void run(DatabaseException parameter) {\r
+                if (parameter != null)\r
+                    ErrorLogger.defaultLogError(parameter);\r
+            }\r
+        });\r
+    }\r
+\r
+    @Override\r
+    public String getValue() {\r
+        return defaultValue;\r
+    }\r
+\r
+    @Override\r
+    public String isValid(String label) {\r
+        if (modifierFailed != null)\r
+            return "Could not resolve validator for this value, modification denied. Reason: "\r
+            + modifierFailed.getMessage();\r
+        // Validity should already be enforced by the editing UI for\r
+        // enumerations.\r
+        return null;\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
+    @Override\r
+    public List<String> getValues() {\r
+       ArrayList<String> result = new ArrayList<String>();\r
+       result.addAll(allowedValues);\r
+       return result;\r
+    }\r
+\r
+};\r