Merge pull request #39 from kris7t/partial-interpretation

Implement partial interpretation based model generation

1 files changed, 35 insertions, 0 deletions

diff --git a/subprojects/viatra-runtime/src/main/java/tools/refinery/viatra/runtime/matchers/context/IPosetComparator.java b/subprojects/viatra-runtime/src/main/java/tools/refinery/viatra/runtime/matchers/context/IPosetComparator.java
new file mode 100644
index 00000000..e2d5bcee
--- /dev/null
+++ b/subprojects/viatra-runtime/src/main/java/tools/refinery/viatra/runtime/matchers/context/IPosetComparator.java
@@ -0,0 +1,35 @@
+/*******************************************************************************
+ * Copyright (c) 2010-2016, 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.matchers.context;
+
+import tools.refinery.viatra.runtime.matchers.tuple.Tuple;
+
+/**
+ * Implementations of this interface aid the query engine with the ordering of poset elements. This information is
+ * particularly important in the delete and re-derive evaluation mode because they let the engine identify monotone
+ * change pairs.
+ * 
+ * @author Tamas Szabo
+ * @since 1.6
+ */
+public interface IPosetComparator {
+
+    /**
+     * Returns true if the 'left' tuple of poset elements is smaller or equal than the 'right' tuple of poset elements according to
+     * the partial order that this poset comparator employs. 
+     * 
+     * @param left
+     *            the left tuple of poset elements
+     * @param right
+     *            the right tuple of poset elements
+     * @return true if left is smaller or equal to right, false otherwise
+     */
+    public boolean isLessOrEqual(final Tuple left, final Tuple right);
+
+}