remove unused CrateSearchService

sql/src/main/java/io/crate/action/sql/query/LuceneSortGenerator.java

@@ -0,0 +1,57 @@
+/*
+ * Licensed to CRATE Technology GmbH ("Crate") under one or more contributor
+ * license agreements.  See the NOTICE file distributed with this work for
+ * additional information regarding copyright ownership.  Crate licenses
+ * this file to you 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.
+ *
+ * However, if you have executed another commercial license agreement
+ * with Crate these terms will supersede the license and you may use the
+ * software solely pursuant to the terms of the relevant commercial agreement.
+ */
+
+package io.crate.action.sql.query;
+
+import io.crate.analyze.OrderBy;
+import io.crate.operation.collect.CollectInputSymbolVisitor;
+import io.crate.operation.reference.doc.lucene.LuceneCollectorExpression;
+import io.crate.planner.symbol.Symbol;
+import org.apache.lucene.search.Sort;
+import org.apache.lucene.search.SortField;
+import org.elasticsearch.search.internal.SearchContext;
+
+import javax.annotation.Nullable;
+import java.util.List;
+
+public class LuceneSortGenerator {
+
+    @Nullable
+    private static Sort generateLuceneSort(SearchContext context,
+                                           List<Symbol> symbols,
+                                           boolean[] reverseFlags,
+                                           Boolean[] nullsFirst,
+                                           SortSymbolVisitor sortSymbolVisitor) {
+        if (symbols.isEmpty()) {
+            return null;
+        }
+        SortField[] sortFields = sortSymbolVisitor.generateSortFields(symbols, context, reverseFlags, nullsFirst);
+        return new Sort(sortFields);
+    }
+
+    @Nullable
+    public static Sort generateLuceneSort(SearchContext context,
+                                     OrderBy orderBy,
+                                     CollectInputSymbolVisitor<LuceneCollectorExpression<?>> inputSymbolVisitor) {
+        SortSymbolVisitor sortSymbolVisitor = new SortSymbolVisitor(inputSymbolVisitor);
+        return generateLuceneSort(context, orderBy.orderBySymbols(), orderBy.reverseFlags(), orderBy.nullsFirst(), sortSymbolVisitor);
+    }
+}