Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.diagram / src / org / simantics / diagram / symbolcontribution / CompositeSymbolProviderFactory.java

diff --git a/bundles/org.simantics.diagram/src/org/simantics/diagram/symbolcontribution/CompositeSymbolProviderFactory.java b/bundles/org.simantics.diagram/src/org/simantics/diagram/symbolcontribution/CompositeSymbolProviderFactory.java
new file mode 100644 (file)
index 0000000..f27bd0b
--- /dev/null
+++ b/bundles/org.simantics.diagram/src/org/simantics/diagram/symbolcontribution/CompositeSymbolProviderFactory.java
@@ -0,0 +1,141 @@
+/*******************************************************************************\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.symbolcontribution;\r
+\r
+import java.util.ArrayList;\r
+import java.util.Collection;\r
+import java.util.HashSet;\r
+import java.util.List;\r
+import java.util.Map;\r
+import java.util.Set;\r
+import java.util.TreeMap;\r
+import java.util.TreeSet;\r
+\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.diagram.symbollibrary.ISymbolGroup;\r
+import org.simantics.utils.datastructures.MapList;\r
+import org.simantics.utils.strings.EString;\r
+\r
+/**\r
+ * @author Tuukka Lehtonen\r
+ */\r
+public class CompositeSymbolProviderFactory implements SymbolProviderFactory {\r
+\r
+    Collection<SymbolProviderFactory> factories;\r
+\r
+    public CompositeSymbolProviderFactory(Collection<SymbolProviderFactory> factories) {\r
+        if (factories == null)\r
+            throw new NullPointerException("null factories");\r
+        this.factories = factories;\r
+    }\r
+\r
+    @Override\r
+    public int hashCode() {\r
+        return factories.hashCode();\r
+    }\r
+\r
+    @Override\r
+    public boolean equals(Object obj) {\r
+        if (this == obj)\r
+            return true;\r
+        if (obj == null)\r
+            return false;\r
+        if (getClass() != obj.getClass())\r
+            return false;\r
+        CompositeSymbolProviderFactory other = (CompositeSymbolProviderFactory) obj;\r
+        return factories.equals(other.factories);\r
+    }\r
+\r
+    @Override\r
+    public ISymbolProvider create(ReadGraph graph) throws DatabaseException {\r
+        ArrayList<ISymbolProvider> providers = new ArrayList<ISymbolProvider>(factories.size());\r
+        for (SymbolProviderFactory factory : factories) {\r
+            ISymbolProvider provider = factory.create(graph);\r
+            providers.add(provider);\r
+        }\r
+        return new CompositeSymbolProvider(providers);\r
+    }\r
+\r
+    static class CompositeSymbolProvider extends AbstractSymbolProvider {\r
+\r
+        Collection<ISymbolProvider> providers;\r
+\r
+        public CompositeSymbolProvider(Collection<ISymbolProvider> providers) {\r
+            this.providers = providers;\r
+        }\r
+\r
+        @Override\r
+        public Collection<ISymbolGroup> getSymbolGroups() {\r
+            MapList<String, ISymbolGroup> groupsByName = new MapList<String, ISymbolGroup>();\r
+            Set<Object> processedIds = new HashSet<Object>();\r
+            Map<String, ISymbolGroup> groups = new TreeMap<String, ISymbolGroup>();\r
+            for(ISymbolProvider provider : providers) {\r
+                for(ISymbolGroup group : provider.getSymbolGroups()) {\r
+                    String name = group.getName();\r
+                    if (group instanceof IIdentifiedObject) {\r
+                        Object id = ((IIdentifiedObject) group).getId();\r
+                        if (!processedIds.add(id))\r
+                            continue;\r
+                    }\r
+                    groupsByName.add(name, group);\r
+                }\r
+            }\r
+            // Process groups with multiple ISymbolGroup contributions\r
+            // into CompositeSymbolGroupsand leave single ISymbolGroups as such.\r
+            for (String name : groupsByName.getKeys()) {\r
+                List<ISymbolGroup> grps = groupsByName.getValues(name);\r
+                int grpCount = grps.size();\r
+                if (grpCount == 1) {\r
+                    groups.put(name, grps.get(0));\r
+                } else if (grpCount > 1) {\r
+                    Object id = combineIdentification(grps);\r
+                    String description = combineDescriptions(grps);\r
+                    CompositeSymbolGroup cgroup = new CompositeSymbolGroup(id, name, description);\r
+                    for (ISymbolGroup grp : grps)\r
+                        cgroup.add(grp);\r
+                    groups.put(name, cgroup);\r
+                }\r
+            }\r
+            return new ArrayList<ISymbolGroup>(groups.values());\r
+        }\r
+\r
+        private Object combineIdentification(List<ISymbolGroup> grps) {\r
+            Set<Object> id = new HashSet<Object>();\r
+            for (ISymbolGroup grp : grps) {\r
+                if (grp instanceof IIdentifiedObject) { \r
+                    id.add( ((IIdentifiedObject) grp).getId() );\r
+                }\r
+            }\r
+            return id;\r
+        }\r
+\r
+        private String combineDescriptions(List<ISymbolGroup> grps) {\r
+            Set<String> descs = new TreeSet<String>();\r
+            for (ISymbolGroup grp : grps)\r
+                descs.add(grp.getDescription());\r
+            if (descs.isEmpty())\r
+                return "";\r
+            if (descs.size() == 1)\r
+                return descs.iterator().next();\r
+            return EString.implode(descs);\r
+        }\r
+\r
+        @Override\r
+        public void setListener(Runnable listener) {\r
+            for (ISymbolProvider provider : providers)\r
+                provider.setListener(listener);\r
+        }\r
+\r
+    }\r
+\r
+}\r