Java tutorial
/* * Copyright 2019 ThoughtWorks, Inc. * * 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.thoughtworks.go.apiv4.agents.representers; import com.google.gson.JsonArray; import com.google.gson.JsonElement; import com.thoughtworks.go.api.util.HaltApiResponses; import com.thoughtworks.go.util.TriState; import org.apache.commons.lang3.StringUtils; import java.util.*; abstract class UpdateRequestRepresenter { static List<String> extractToList(Optional<JsonArray> arrayOptional) { final List<String> treeSet = new ArrayList<>(); if (arrayOptional.isPresent()) { for (JsonElement jsonElement : arrayOptional.get()) { treeSet.add(jsonElement.getAsString()); } } return treeSet; } static String toCommaSeparatedString(JsonArray jsonArray) { if (jsonArray == null) { return null; } final Set<String> list = new TreeSet<>(); for (JsonElement jsonElement : jsonArray) { list.add(jsonElement.getAsString()); } return String.join(",", list); } static TriState toTriState(String agentConfigState) { if (StringUtils.isBlank(agentConfigState)) { return TriState.UNSET; } else if (StringUtils.equalsIgnoreCase(agentConfigState, "enabled")) { return TriState.TRUE; } else if (StringUtils.equalsIgnoreCase(agentConfigState, "disabled")) { return TriState.FALSE; } else { throw HaltApiResponses.haltBecauseOfReason( "The value of `agent_config_state` can be one of `Enabled`, `Disabled` or null."); } } }