| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF 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. |
| */ |
| |
| package org.apache.samza.sql.planner; |
| |
| import java.util.Map; |
| |
| import org.apache.calcite.sql.SqlCallBinding; |
| import org.apache.calcite.sql.SqlOperandCountRange; |
| import org.apache.calcite.sql.SqlOperator; |
| import org.apache.calcite.sql.type.SqlOperandCountRanges; |
| import org.apache.calcite.sql.type.SqlOperandTypeChecker; |
| import org.apache.commons.lang3.tuple.Pair; |
| |
| import com.google.common.collect.Maps; |
| |
| |
| class Checker implements SqlOperandTypeChecker { |
| private SqlOperandCountRange range; |
| |
| public static final Checker ANY_CHECKER = new Checker(); |
| private static final Map<Pair<Integer, Integer>, Checker> checkerMap = Maps.newHashMap(); |
| |
| public static Checker getChecker(int min, int max) { |
| final Pair<Integer, Integer> range = Pair.of(min, max); |
| if (checkerMap.containsKey(range)) { |
| return checkerMap.get(range); |
| } |
| |
| final Checker newChecker; |
| if (min == max) { |
| newChecker = new Checker(min); |
| } else { |
| newChecker = new Checker(min, max); |
| } |
| |
| checkerMap.put(range, newChecker); |
| return newChecker; |
| } |
| |
| private Checker(int size) { |
| range = SqlOperandCountRanges.of(size); |
| } |
| |
| private Checker(int min, int max) { |
| range = SqlOperandCountRanges.between(min, max); |
| } |
| |
| private Checker() { |
| range = SqlOperandCountRanges.any(); |
| } |
| |
| @Override |
| public boolean checkOperandTypes(SqlCallBinding callBinding, boolean throwOnFailure) { |
| return true; |
| } |
| |
| @Override |
| public SqlOperandCountRange getOperandCountRange() { |
| return range; |
| } |
| |
| @Override |
| public String getAllowedSignatures(SqlOperator op, String opName) { |
| return opName + "(Drill - Opaque)"; |
| } |
| |
| @Override |
| public Consistency getConsistency() { |
| return Consistency.NONE; |
| } |
| |
| @Override |
| public boolean isOptional(int i) { |
| return false; |
| } |
| } |