--- /dev/null
+/*******************************************************************************\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.synchronization.graph;\r
+\r
+import java.awt.geom.AffineTransform;\r
+\r
+import org.simantics.databoard.Bindings;\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.WriteGraph;\r
+import org.simantics.db.common.utils.CommonDBUtils;\r
+import org.simantics.db.common.utils.OrderedSetUtils;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.db.layer0.util.Layer0Utils;\r
+import org.simantics.diagram.stubs.DiagramResource;\r
+import org.simantics.diagram.synchronization.CopyAdvisor;\r
+import org.simantics.diagram.synchronization.IModifiableSynchronizationContext;\r
+import org.simantics.diagram.synchronization.ModificationAdapter;\r
+import org.simantics.diagram.synchronization.SynchronizationHints;\r
+import org.simantics.diagram.synchronization.graph.layer.GraphLayerManager;\r
+import org.simantics.diagram.ui.DiagramModelHints;\r
+import org.simantics.g2d.diagram.DiagramHints;\r
+import org.simantics.g2d.diagram.DiagramMutator;\r
+import org.simantics.g2d.diagram.IDiagram;\r
+import org.simantics.g2d.element.ElementHints;\r
+import org.simantics.g2d.element.ElementUtils;\r
+import org.simantics.g2d.element.IElement;\r
+import org.simantics.layer0.Layer0;\r
+\r
+/**\r
+ * @author Tuukka Lehtonen\r
+ */\r
+public class AddElement extends ModificationAdapter {\r
+\r
+ //private static final boolean DEBUG_ELEMENT_COPY = false;\r
+\r
+ IModifiableSynchronizationContext context;\r
+ IDiagram diagram;\r
+ Resource diagramResource;\r
+ IElement element;\r
+ Resource copyOf;\r
+\r
+ public AddElement(IModifiableSynchronizationContext context, IDiagram d, IElement element) {\r
+ super(ADD_NODE_PRIORITY);\r
+\r
+ assert context != null;\r
+ assert d != null;\r
+ assert element != null;\r
+\r
+ this.context = context;\r
+ this.diagram = d;\r
+ this.diagramResource = d.getHint(DiagramModelHints.KEY_DIAGRAM_RESOURCE);\r
+ assert this.diagramResource != null;\r
+ this.element = element;\r
+ this.copyOf = element.getHint(ElementHints.KEY_COPY_OF_OBJECT);\r
+ }\r
+\r
+ @Override\r
+ public void perform(WriteGraph g) throws Exception {\r
+ BasicResources br = context.get(GraphSynchronizationHints.BASIC_RESOURCES);\r
+ DiagramMutator mutator = diagram.getHint(DiagramHints.KEY_MUTATOR);\r
+ \r
+ CommonDBUtils.selectClusterSet(g, diagramResource);\r
+\r
+ // 1. Resolve the element class to instantiate the new element from.\r
+ Resource elementClass = ElementUtils.checkedAdapt(element.getElementClass(), Resource.class);\r
+\r
+ // 2. Resolve custom element writer\r
+ ElementWriter writer = element.removeHint(DiagramModelHints.KEY_ELEMENT_WRITER);\r
+ if (writer == null)\r
+ writer = g.adapt(elementClass, ElementWriter.class);\r
+\r
+ Resource resource = null;\r
+\r
+ // 3. Try to copy the element from an existing element if requested.\r
+ if (copyOf instanceof Resource) {\r
+ CopyAdvisor ca = diagram.getHint(SynchronizationHints.COPY_ADVISOR);\r
+ if (ca != null) {\r
+ Resource sourceDiagram = g.getPossibleObject(copyOf, Layer0.getInstance(g).PartOf);\r
+ resource = CopyAdvisorUtil.copy(context, g, ca, copyOf, sourceDiagram, diagramResource);\r
+ }\r
+ }\r
+\r
+ if (resource == null) {\r
+ // Copying either was not issued or couldn't be performed.\r
+ // Create target resource for the new element.\r
+ resource = g.newResource();\r
+ g.claim(resource, br.L0.InstanceOf, null, elementClass);\r
+ }\r
+\r
+ // Add comment to change set.\r
+// CommentMetadata cm = g.getMetadata(CommentMetadata.class);\r
+// g.addMetadata(cm.add("Added element " + resource));\r
+\r
+ // 4. add the new element to the diagram composite\r
+ OrderedSetUtils.add(g, diagramResource, resource);\r
+\r
+ // 4.1. Give running name to element and increment the counter attached to the diagram.\r
+ String name = claimFreshElementName(g, diagramResource, resource);\r
+ \r
+ // Add comment to change set.\r
+ Layer0Utils.addCommentMetadata(g, "Added element " + name + " " + resource + " to composite " + diagramResource);\r
+ \r
+ // 4.2. Make the diagram consist of the new element\r
+ g.claim(diagramResource, br.L0.ConsistsOf, resource);\r
+\r
+ // 5. Synchronize the transformation of the element\r
+ AffineTransform at = element.getHint(ElementHints.KEY_TRANSFORM);\r
+ if (at != null)\r
+ DiagramGraphUtil.setTransform(g, resource, at);\r
+ \r
+ // 6. Perform custom per element type synchronization to graph\r
+ writer.addToGraph(g, element, resource);\r
+\r
+ // 7. Register the newly created element resource with mutator in case\r
+ // any other modification needs to reference it later on in the mutator\r
+ // commit process.\r
+ element.setHint(ElementHints.KEY_OBJECT, resource);\r
+ mutator.register(element, resource);\r
+\r
+ // 7. Put the element on all the currently active layers if possible.\r
+ GraphLayerManager glm = context.get(GraphSynchronizationHints.GRAPH_LAYER_MANAGER);\r
+ if (glm != null) {\r
+ glm.removeFromAllLayers(g, resource);\r
+ glm.putElementOnVisibleLayers(diagram, g, resource);\r
+ }\r
+ }\r
+\r
+// String findFreshName(ReadGraph graph, Resource container) throws DatabaseException {\r
+// Set<String> children = graph.syncRequest(new UnescapedChildMapOfResource(container)).keySet();\r
+// String id;\r
+// for (int i = 0; children.contains(id = String.valueOf(i)); ++i);\r
+// return id;\r
+// }\r
+\r
+ /**\r
+ * Names the specified element on the specified diagram based on a numeric\r
+ * ascending counter attached to the diagram. The purpose of the counter is\r
+ * to optimize name generation compared to always getting the names of each\r
+ * diagram element to make sure nothing collides. This method is much faster\r
+ * but obviously there is room for error.\r
+ * \r
+ * @param graph\r
+ * @param diagram\r
+ * @param element\r
+ * @return\r
+ * @throws DatabaseException\r
+ */\r
+ public static final String claimFreshElementName(WriteGraph graph, Resource diagram, Resource element) throws DatabaseException {\r
+ Layer0 L0 = Layer0.getInstance(graph);\r
+ DiagramResource DIA = DiagramResource.getInstance(graph);\r
+ // Give running name to element and increment the counter attached to the diagram.\r
+ Long l = graph.getPossibleRelatedValue(diagram, DIA.HasModCount, Bindings.LONG);\r
+ if (l == null)\r
+ l = Long.valueOf(0L);\r
+ String name = l.toString();\r
+ graph.claimLiteral(element, L0.HasName, name, Bindings.STRING);\r
+ graph.claimLiteral(diagram, DIA.HasModCount, ++l, Bindings.LONG);\r
+ return name;\r
+ }\r
+\r
+}
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Code Review / simantics / platform.git / blobdiff