Java tutorial
/* * Copyright 2016-2018 the original author or authors. * * 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.kazuki43zoo.apistub.domain.model; import org.apache.commons.lang3.StringUtils; import java.util.Arrays; import java.util.List; import java.util.stream.Collectors; public enum KeyGeneratingStrategy { ALL { @Override public String generate(List<Object> keys) { if (keys == null || keys.isEmpty()) { return null; } return join(keys); } }; public static final String KEY_DELIMITER = "/"; public static List<String> split(String keys) { return Arrays.asList(StringUtils.splitByWholeSeparatorPreserveAllTokens(keys, KEY_DELIMITER)); } public static <T> String join(List<T> keys) { return keys.stream().map(e -> e == null ? "" : e.toString()).collect(Collectors.joining(KEY_DELIMITER)); } public abstract String generate(List<Object> values); }