1 files changed, 59 insertions, 0 deletions
diff --git a/yang-comparator/src/main/java/org/onap/modeling/yangkit/comparator/AbstractYangStatementComparator.java b/yang-comparator/src/main/java/org/onap/modeling/yangkit/comparator/AbstractYangStatementComparator.java
new file mode 100644
index 0000000..5e3af0f
--- /dev/null
+++ b/yang-comparator/src/main/java/org/onap/modeling/yangkit/comparator/AbstractYangStatementComparator.java
@@ -0,0 +1,59 @@
+/*
+Copyright 2023 Huawei Technologies
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+ */
+
+package org.onap.modeling.yangkit.comparator;
+
+import java.util.List;
+
+import org.yangcentral.yangkit.model.api.stmt.YangStatement;
+
+
+public abstract class AbstractYangStatementComparator<T extends YangStatement> implements YangStatementComparator<T> {
+    /**
+     * constructor.
+     */
+    public AbstractYangStatementComparator() {
+    }
+
+    /**
+     * get compatibility rules.
+     *
+     * @return rules
+     */
+    public CompatibilityRules getCompatibilityRules() {
+        return CompatibilityRules.getInstance();
+    }
+
+    /**
+     * get change information.
+     *
+     * @param left  left statement
+     * @param right right statement
+     * @return list of change information.
+     */
+    protected abstract List<CompatibilityRule.ChangeInfo> getChangeInfo(T left, T right);
+
+    /**
+     * the default compatibility result.
+     *
+     * @param left       left statement
+     * @param right      right statement
+     * @param changeInfo change information
+     * @return compatibility result
+     */
+    protected abstract CompatibilityInfo defaultCompatibility(T left, T right,
+                                                              CompatibilityRule.ChangeInfo changeInfo);
+}