/* * 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 com.facebook.presto.sql.planner.assertions; import static com.google.common.base.MoreObjects.toStringHelper; import static java.util.Objects.requireNonNull; final class AliasPair { final String left; final String right; AliasPair(String left, String right) { this.left = requireNonNull(left, "left is null"); this.right = requireNonNull(right, "right is null"); } @Override public String toString() { return toStringHelper(this) .add("left", left) .add("right", right) .toString(); } }