1 files changed, 49 insertions, 0 deletions

diff --git a/subprojects/viatra-runtime-rete/src/main/java/tools/refinery/viatra/runtime/rete/matcher/DRedReteBackendFactory.java b/subprojects/viatra-runtime-rete/src/main/java/tools/refinery/viatra/runtime/rete/matcher/DRedReteBackendFactory.java
new file mode 100644
index 00000000..83e86fe6
--- /dev/null
+++ b/subprojects/viatra-runtime-rete/src/main/java/tools/refinery/viatra/runtime/rete/matcher/DRedReteBackendFactory.java
@@ -0,0 +1,49 @@
+/*******************************************************************************
+ * Copyright (c) 2010-2019, Tamas Szabo, 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.rete.matcher;
+
+import tools.refinery.viatra.runtime.matchers.backend.IQueryBackend;
+import tools.refinery.viatra.runtime.matchers.context.IQueryBackendContext;
+
+/**
+ * A {@link ReteBackendFactory} implementation that creates {@link ReteEngine}s that use delete and re-derive
+ * evaluation.
+ * 
+ * @author Tamas Szabo
+ * @since 2.2
+ */
+public class DRedReteBackendFactory extends ReteBackendFactory {
+
+    public static final DRedReteBackendFactory INSTANCE = new DRedReteBackendFactory();
+
+    @Override
+    public IQueryBackend create(IQueryBackendContext context) {
+        return create(context, true, null);
+    }
+
+    @Override
+    public int hashCode() {
+        return DRedReteBackendFactory.class.hashCode();
+    }
+
+    @Override
+    public boolean equals(final Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (!(obj instanceof DRedReteBackendFactory)) {
+            return false;
+        }
+        return true;
+    }
+
+}