NQueensSolutionCloner + remove CloneLedger

optaplanner-examples/src/main/java/org/optaplanner/examples/nqueens/optional/NQueensSolutionCloner.java

@@ -0,0 +1,49 @@
+/*
+ * Copyright 2016 Red Hat, Inc. and/or its affiliates.
+ *
+ * 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.optaplanner.examples.nqueens.optional;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.optaplanner.core.api.domain.solution.cloner.SolutionCloner;
+import org.optaplanner.examples.nqueens.domain.NQueens;
+import org.optaplanner.examples.nqueens.domain.Queen;
+
+public class NQueensSolutionCloner implements SolutionCloner<NQueens> {
+
+    @Override
+    public NQueens cloneSolution(NQueens original) {
+        NQueens clone = new NQueens();
+        clone.setId(original.getId());
+        clone.setN(original.getN());
+        clone.setColumnList(original.getColumnList());
+        clone.setRowList(original.getRowList());
+        List<Queen> queenList = original.getQueenList();
+        List<Queen> clonedQueenList = new ArrayList<Queen>(queenList.size());
+        for (Queen originalQueen : queenList) {
+            Queen cloneQueen = new Queen();
+            cloneQueen.setId(originalQueen.getId());
+            cloneQueen.setColumn(originalQueen.getColumn());
+            cloneQueen.setRow(originalQueen.getRow());
+            clonedQueenList.add(cloneQueen);
+        }
+        clone.setQueenList(clonedQueenList);
+        clone.setScore(original.getScore());
+        return clone;
+    }
+
+}