Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.layer0.utils / src / org / simantics / layer0 / utils / predicates / Disjunction.java

diff --git a/bundles/org.simantics.layer0.utils/src/org/simantics/layer0/utils/predicates/Disjunction.java b/bundles/org.simantics.layer0.utils/src/org/simantics/layer0/utils/predicates/Disjunction.java
new file mode 100644 (file)
index 0000000..5edb02a
--- /dev/null
+++ b/bundles/org.simantics.layer0.utils/src/org/simantics/layer0/utils/predicates/Disjunction.java
@@ -0,0 +1,124 @@
+/*******************************************************************************\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.layer0.utils.predicates;\r
+\r
+import java.util.Arrays;\r
+import java.util.Collection;\r
+import java.util.Collections;\r
+import java.util.HashSet;\r
+import java.util.Iterator;\r
+import java.util.Set;\r
+\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.WriteGraph;\r
+import org.simantics.db.exception.DatabaseException;\r
+\r
+public class Disjunction extends UnaryPredicate {\r
+\r
+       Collection<IUnaryPredicate> predicates;\r
+\r
+       public Disjunction(Collection<IUnaryPredicate> predicates) {\r
+               this.predicates = predicates;\r
+       }\r
+       \r
+       public Disjunction(IUnaryPredicate ... predicates) {\r
+           this(Arrays.asList(predicates));\r
+       }\r
+\r
+       @Override\r
+       public Collection<Resource> getResources(ReadGraph g) throws DatabaseException {\r
+               Iterator<IUnaryPredicate> it = predicates.iterator();\r
+               \r
+               while(it.hasNext()) {\r
+                       Collection<Resource> result = it.next().getResources(g);\r
+                       if(!result.isEmpty()) {\r
+                               while(it.hasNext()) {\r
+                                       Collection<Resource> temp = it.next().getResources(g);\r
+                                       if(!temp.isEmpty()) {\r
+                                               Set<Resource> merged = new HashSet<Resource>(result.size() + temp.size());\r
+                                               merged.addAll(result);\r
+                                               merged.addAll(temp);\r
+                                               while(it.hasNext())\r
+                                                       merged.addAll(it.next().getResources(g));\r
+                                               return merged;\r
+                                       }\r
+                               }\r
+                               return result;\r
+                       }\r
+               }\r
+               return Collections.emptyList();\r
+       }\r
+    \r
+       @Override\r
+       public boolean has(ReadGraph g, Resource resource) throws DatabaseException {\r
+               for(IUnaryPredicate pred : predicates)\r
+                       if(pred.has(g, resource))\r
+                               return true;\r
+               return false;\r
+       }\r
+\r
+       @Override\r
+       public boolean supportsUnboundedQuery() {               \r
+               for(IUnaryPredicate pred : predicates)\r
+                       if(!pred.supportsUnboundedQuery())\r
+                               return false;\r
+               return true;\r
+       }\r
+\r
+       @Override\r
+       public void add(WriteGraph g, Resource r) {\r
+               throw new UnsupportedOperationException();\r
+       }\r
+\r
+       @Override\r
+       public void remove(WriteGraph g, Resource r) {\r
+               throw new UnsupportedOperationException();\r
+       }\r
+\r
+       @Override\r
+       public boolean supportsAddition() {\r
+               return false;\r
+       }\r
+\r
+       @Override\r
+       public boolean supportsRemoval() {              \r
+               return false;\r
+       }\r
+\r
+       @Override\r
+       public int hashCode() {\r
+               final int prime = 31;\r
+               int result = 1;\r
+               result = prime * result\r
+                               + ((predicates == null) ? 0 : predicates.hashCode());\r
+               return result;\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
+               Disjunction other = (Disjunction) obj;\r
+               if (predicates == null) {\r
+                       if (other.predicates != null)\r
+                               return false;\r
+               } else if (!predicates.equals(other.predicates))\r
+                       return false;\r
+               return true;\r
+       }       \r
+       \r
+}\r