Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.mapping / src / org / simantics / mapping / rule / IfRule.java

diff --git a/bundles/org.simantics.mapping/src/org/simantics/mapping/rule/IfRule.java b/bundles/org.simantics.mapping/src/org/simantics/mapping/rule/IfRule.java
new file mode 100644 (file)
index 0000000..e522139
--- /dev/null
+++ b/bundles/org.simantics.mapping/src/org/simantics/mapping/rule/IfRule.java
@@ -0,0 +1,60 @@
+/*******************************************************************************\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.mapping.rule;\r
+\r
+import gnu.trove.map.hash.TObjectIntHashMap;\r
+\r
+import org.simantics.db.Resource;\r
+import org.simantics.mapping.constraint.IConstraint;\r
+import org.simantics.mapping.constraint.TooManyUnboundVariablesException;\r
+import org.simantics.mapping.constraint.instructions.IInstruction;\r
+import org.simantics.mapping.rule.instructions.IRuleInstruction;\r
+import org.simantics.mapping.rule.instructions.IfRuleInstruction;\r
+import org.simantics.utils.datastructures.persistent.ImmutableSet;\r
+\r
+public class IfRule implements IRule {\r
+\r
+       IConstraint condition;\r
+       IRule thenRule;\r
+       IRule elseRule;\r
+       \r
+       public IfRule(IConstraint condition, IRule thenRule, IRule elseRule) {\r
+               this.condition = condition;             \r
+               this.thenRule = thenRule;\r
+               this.elseRule = elseRule;\r
+       }\r
+       \r
+       public IfRule(IConstraint condition, IRule thenRule) {\r
+               this(condition, thenRule, null);\r
+       }\r
+\r
+       @Override\r
+       public ImmutableSet<Resource> binds() {\r
+               ImmutableSet<Resource> ret = condition.binds().addAll(thenRule.binds());\r
+               if(elseRule != null)\r
+                       ret = ret.addAll(elseRule.binds());\r
+               return ret;\r
+       }\r
+\r
+       @Override\r
+       public IRuleInstruction createInstruction(\r
+                       TObjectIntHashMap<Resource> variableIds,\r
+                       ImmutableSet<Resource> bound) throws TooManyUnboundVariablesException {\r
+               IInstruction conditionInstruction = \r
+                       condition.createInstruction(variableIds, bound);\r
+               bound = bound.addAll(condition.binds());\r
+               return new IfRuleInstruction(conditionInstruction, \r
+                               thenRule.createInstruction(variableIds, bound),\r
+                               elseRule == null ? null : elseRule.createInstruction(variableIds, bound));\r
+       }\r
+\r
+}\r