+/*******************************************************************************\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