X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.mapping%2Fsrc%2Forg%2Fsimantics%2Fmapping%2Fconstraint%2Finstructions%2FCombinedInstruction.java;fp=bundles%2Forg.simantics.mapping%2Fsrc%2Forg%2Fsimantics%2Fmapping%2Fconstraint%2Finstructions%2FCombinedInstruction.java;h=95134af09244d21d3c73d5af19276bfde97cac91;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git

diff --git a/bundles/org.simantics.mapping/src/org/simantics/mapping/constraint/instructions/CombinedInstruction.java b/bundles/org.simantics.mapping/src/org/simantics/mapping/constraint/instructions/CombinedInstruction.java
new file mode 100644
index 000000000..95134af09
--- /dev/null
+++ b/bundles/org.simantics.mapping/src/org/simantics/mapping/constraint/instructions/CombinedInstruction.java
@@ -0,0 +1,119 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.mapping.constraint.instructions;
+
+import gnu.trove.map.hash.TIntIntHashMap;
+import gnu.trove.set.hash.TIntHashSet;
+
+import org.simantics.db.ReadGraph;
+import org.simantics.db.WriteGraph;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.mapping.IContextualModification;
+
+public abstract class CombinedInstruction implements IInstruction {
+	IInstruction[] instructions;
+	
+	public CombinedInstruction(IInstruction... instructions) {
+		this.instructions = instructions;
+	}	
+	
+	class CompositeClaim implements IContextualModification {
+
+		IContextualModification modification;
+		int instructionId;
+		
+		public CompositeClaim(IContextualModification modification, int instructionId) {
+			this.modification = modification;
+			this.instructionId = instructionId;
+		}
+
+		@Override
+		public void perform(WriteGraph g, Object[] bindings) throws DatabaseException {
+			modification.perform(g, bindings);
+			for(int i=instructionId+1;i<instructions.length;++i)
+				instructions[i].doClaim(g, bindings);
+		}
+		
+	}
+	
+	@Override
+	public IContextualModification claim(ReadGraph g, Object[] bindings) throws DatabaseException {
+		for(int instructionId=0;instructionId<instructions.length;++instructionId) {
+			IContextualModification modification = instructions[instructionId].claim(g, bindings);
+			if(modification != null) {
+				if(instructionId==instructions.length-1)
+					return modification;
+				else 
+					return new CompositeClaim(modification, instructionId);
+			}
+		}
+		return null;
+	}
+
+	class CompositeDeny implements IContextualModification {
+
+		IContextualModification modification;
+		int instructionId;
+		
+		public CompositeDeny(IContextualModification modification, int instructionId) {
+			this.modification = modification;
+			this.instructionId = instructionId;
+		}
+
+		@Override
+		public void perform(WriteGraph g, Object[] bindings) throws DatabaseException {
+			modification.perform(g, bindings);
+			for(int i=instructionId+1;i<instructions.length;++i)
+				instructions[i].doDeny(g, bindings);
+		}
+		
+	}
+
+	@Override
+	public IContextualModification deny(ReadGraph g, Object[] bindings) throws DatabaseException {
+		for(int instructionId=0;instructionId<instructions.length;++instructionId) {
+			IContextualModification modification = instructions[instructionId].deny(g, bindings);
+			if(modification != null) {
+				if(instructionId==instructions.length-1)
+					return modification;
+				else 
+					return new CompositeDeny(modification, instructionId);
+			}
+		}
+		return null;
+	}
+
+	@Override
+	public void doClaim(WriteGraph g, Object[] bindings) throws DatabaseException {
+		for(int i=0;i<instructions.length;++i)
+			instructions[i].doClaim(g, bindings);		
+	}
+
+	@Override
+	public void doDeny(WriteGraph g, Object[] bindings) throws DatabaseException {
+		for(int i=0;i<instructions.length;++i)
+			instructions[i].doDeny(g, bindings);					
+	}
+
+	@Override
+	public void collectVariables(TIntHashSet reads, TIntHashSet writes) {
+		for(IInstruction inst : instructions)
+			inst.collectVariables(reads, writes);
+	}	
+	
+	@Override
+	public void mapVariables(TIntIntHashMap map) {
+		for(IInstruction inst : instructions)
+			inst.mapVariables(map);
+	}
+
+}