--- /dev/null
+/*******************************************************************************\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.instructions;\r
+\r
+import gnu.trove.map.hash.TIntIntHashMap;\r
+import gnu.trove.set.hash.TIntHashSet;\r
+\r
+import java.util.Arrays;\r
+\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.WriteGraph;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.layer0.utils.triggers.IModification;\r
+import org.simantics.mapping.IContextualModification;\r
+import org.simantics.mapping.constraint.instructions.IInstruction;\r
+\r
+public class ClaimRuleInstruction implements IRuleInstruction {\r
+\r
+ IInstruction instruction; \r
+ IRuleInstruction continuation;\r
+ \r
+ public ClaimRuleInstruction(IInstruction instruction,\r
+ IRuleInstruction continuation) {\r
+ this.instruction = instruction;\r
+ this.continuation = continuation;\r
+ }\r
+\r
+ public ClaimRuleInstruction(IInstruction instruction) {\r
+ this(instruction, null);\r
+ }\r
+ \r
+ @Override\r
+ public IModification execute(ReadGraph g, Object[] bindings) throws DatabaseException {\r
+ final IContextualModification modi = instruction.claim(g, bindings);\r
+ if(modi != null) {\r
+ final Object[] curBindings = Arrays.copyOf(bindings, bindings.length);\r
+ return new IModification() {\r
+\r
+ @Override\r
+ public void perform(WriteGraph g) throws DatabaseException {\r
+ modi.perform(g, curBindings);\r
+ if(continuation != null) {\r
+ IModification modi2 = continuation.execute(g, curBindings);\r
+ if(modi2 != null)\r
+ modi2.perform(g);\r
+ }\r
+ }\r
+ \r
+ };\r
+ }\r
+ if(continuation != null)\r
+ return continuation.execute(g, bindings);\r
+ return null;\r
+ }\r
+ \r
+ @Override\r
+ public void doExecute(WriteGraph g, Object[] bindings) throws DatabaseException {\r
+ instruction.doClaim(g, bindings);\r
+ }\r
+ \r
+ @Override\r
+ public void collectVariables(TIntHashSet reads, TIntHashSet writes) {\r
+ instruction.collectVariables(reads, writes);\r
+ if(continuation != null)\r
+ continuation.collectVariables(reads, writes);\r
+ }\r
+\r
+ @Override\r
+ public void mapVariables(TIntIntHashMap map) {\r
+ instruction.mapVariables(map);\r
+ if(continuation != null)\r
+ continuation.mapVariables(map);\r
+ }\r
+ @Override\r
+ public void toString(StringBuilder b, int indent) {\r
+ b.append("claim ");\r
+ instruction.toString(b, indent+1);\r
+ if(continuation != null) {\r
+ b.append('\n');\r
+ for(int i=0;i<indent;++i)\r
+ b.append(INDENTATION);\r
+ b.append("and ");\r
+ continuation.toString(b, indent+1);\r
+ }\r
+ }\r
+}\r