Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.browsing.ui.model / src / org / simantics / browsing / ui / model / children / CompositeChildRule.java

diff --git a/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/children/CompositeChildRule.java b/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/children/CompositeChildRule.java
new file mode 100644 (file)
index 0000000..dec7b58
--- /dev/null
+++ b/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/children/CompositeChildRule.java
@@ -0,0 +1,70 @@
+/*******************************************************************************\r
+ * Copyright (c) 2010, 2011 Association for Decentralized Information Management in\r
+ * 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.children;\r
+\r
+import java.util.ArrayList;\r
+import java.util.Collection;\r
+import java.util.Collections;\r
+import java.util.List;\r
+\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.common.utils.OrderedSetUtils;\r
+import org.simantics.db.exception.DatabaseException;\r
+\r
+public class CompositeChildRule implements ChildRule {    \r
+    List<ChildRule> childRules;\r
+    \r
+    public CompositeChildRule(List<ChildRule> childRules) {\r
+        this.childRules = childRules;\r
+    }\r
+    \r
+    public CompositeChildRule(ReadGraph graph, Resource orderedSet) throws DatabaseException {\r
+        List<Resource> childRuleResources = OrderedSetUtils.toList(graph, orderedSet);\r
+        childRules = new ArrayList<ChildRule>(childRuleResources.size());\r
+        for(Resource childRuleResource : childRuleResources)\r
+            childRules.add(graph.adapt(childRuleResource, ChildRule.class));\r
+    }\r
+    \r
+    @Override\r
+    public Collection<?> getChildren(ReadGraph graph, Object parent) throws DatabaseException {\r
+        Collection<Object> result = Collections.singleton(parent);\r
+        for(int i=0;i<childRules.size();++i) {\r
+            ChildRule rule = childRules.get(i);\r
+            ArrayList<Object> children = new ArrayList<Object>();\r
+            for(Object r : result)\r
+                children.addAll(rule.getChildren(graph, r));\r
+            result = children;\r
+        }\r
+        return result;\r
+    }\r
+    \r
+    @Override\r
+    public Collection<?> getParents(ReadGraph graph, Object child) throws DatabaseException {\r
+        Collection<Object> result = Collections.singleton(child);\r
+        for(int i=childRules.size()-1;i>=0;--i) {\r
+            ChildRule rule = childRules.get(i);\r
+            ArrayList<Object> parents = new ArrayList<Object>();\r
+            for(Object r : result)\r
+                parents.addAll(rule.getParents(graph, r));\r
+            result = parents;\r
+        }\r
+        return result;\r
+    }\r
+\r
+    @Override\r
+    public boolean isCompatible(Class<?> contentType) {\r
+        if(childRules.isEmpty())\r
+           return true; \r
+        return childRules.get(0).isCompatible(contentType);\r
+    }\r
+}\r