1 files changed, 77 insertions, 0 deletions

diff --git a/subprojects/viatra-runtime-localsearch/src/main/java/tools/refinery/viatra/runtime/localsearch/operations/check/InequalityCheck.java b/subprojects/viatra-runtime-localsearch/src/main/java/tools/refinery/viatra/runtime/localsearch/operations/check/InequalityCheck.java
new file mode 100644
index 00000000..3f30c3c4
--- /dev/null
+++ b/subprojects/viatra-runtime-localsearch/src/main/java/tools/refinery/viatra/runtime/localsearch/operations/check/InequalityCheck.java
@@ -0,0 +1,77 @@
+/*******************************************************************************
+ * Copyright (c) 2010-2013, Zoltan Ujhelyi, Istvan Rath and Daniel Varro
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v. 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-v20.html.
+ * 
+ * SPDX-License-Identifier: EPL-2.0
+ *******************************************************************************/
+package tools.refinery.viatra.runtime.localsearch.operations.check;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.function.Function;
+
+import tools.refinery.viatra.runtime.localsearch.MatchingFrame;
+import tools.refinery.viatra.runtime.localsearch.exceptions.LocalSearchException;
+import tools.refinery.viatra.runtime.localsearch.matcher.ISearchContext;
+import tools.refinery.viatra.runtime.localsearch.operations.CheckOperationExecutor;
+import tools.refinery.viatra.runtime.localsearch.operations.ISearchOperation;
+
+/**
+ * @author Zoltan Ujhelyi
+ * @noextend This class is not intended to be subclassed by clients.
+ */
+public class InequalityCheck implements ISearchOperation {
+
+    private class Executor extends CheckOperationExecutor {
+        
+        @Override
+        protected boolean check(MatchingFrame frame, ISearchContext context) {
+            Object source = frame.getValue(sourceLocation);
+            Object target = frame.getValue(targetLocation);
+            if (source == null) {
+                throw new LocalSearchException("Source not bound.");
+            }
+            if (target == null) {
+                throw new LocalSearchException("Target not bound");
+            }
+            return !source.equals(target);
+        }
+        
+        @Override
+        public ISearchOperation getOperation() {
+            return InequalityCheck.this;
+        }
+    }
+    
+    int sourceLocation;
+    int targetLocation;
+
+    public InequalityCheck(int sourceLocation, int targetLocation) {
+        super();
+        this.sourceLocation = sourceLocation;
+        this.targetLocation = targetLocation;
+    }
+    
+    @Override
+    public ISearchOperationExecutor createExecutor() {
+        return new Executor();
+    }
+    
+    @Override
+    public String toString() {
+        return toString(Object::toString);
+    }
+    
+    @Override
+    public String toString(Function<Integer, String> variableMapping) {
+        return "check     "+variableMapping.apply(sourceLocation)+" != "+variableMapping.apply(targetLocation);
+    }
+
+    @Override
+    public List<Integer> getVariablePositions() {
+        return Arrays.asList(sourceLocation, targetLocation);
+    }
+
+}