Migrated source code from Simantics SVN

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

diff --git a/bundles/org.simantics.mapping/src/org/simantics/mapping/rule/instructions/ClaimRuleInstruction.java b/bundles/org.simantics.mapping/src/org/simantics/mapping/rule/instructions/ClaimRuleInstruction.java
new file mode 100644 (file)
index 0000000..966347e
--- /dev/null
+++ b/bundles/org.simantics.mapping/src/org/simantics/mapping/rule/instructions/ClaimRuleInstruction.java
@@ -0,0 +1,95 @@
+/*******************************************************************************\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