| /* |
| * 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.arrow.vector.complex; |
| |
| import java.util.Arrays; |
| |
| /** |
| * Utility methods for state machines based on enums. |
| */ |
| public class StateTool { |
| private StateTool() {} |
| |
| static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(StateTool.class); |
| |
| /** |
| * Verifies <code>currentState</code> is in one of <code>expectedStates</code>, |
| * throws an IllegalArgumentException if it isn't. |
| */ |
| public static <T extends Enum<?>> void check(T currentState, T... expectedStates) { |
| for (T s : expectedStates) { |
| if (s == currentState) { |
| return; |
| } |
| } |
| throw new IllegalArgumentException(String.format("Expected to be in one of these states %s but was actually in " + |
| "state %s", Arrays.toString(expectedStates), currentState)); |
| } |
| |
| } |