| /** |
| * 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.hadoop.yarn.webapp; |
| |
| import com.google.common.collect.Lists; |
| import com.google.inject.servlet.RequestScoped; |
| |
| import java.util.Iterator; |
| import java.util.List; |
| |
| /** |
| * A class to help passing around request scoped info |
| */ |
| @RequestScoped |
| public class ResponseInfo implements Iterable<ResponseInfo.Item> { |
| |
| public static class Item { |
| public final String key; |
| public final String url; |
| public final Object value; |
| public final boolean isRaw; |
| |
| Item(String key, String url, Object value, boolean isRaw) { |
| this.key = key; |
| this.url = url; |
| this.value = value; |
| this.isRaw = isRaw; |
| } |
| |
| public static Item of(String key, Object value, boolean isRaw) { |
| return new Item(key, null, value, isRaw); |
| } |
| |
| public static Item of(String key, String url, Object value) { |
| return new Item(key, url, value, false); |
| } |
| } |
| |
| final List<Item> items = Lists.newArrayList(); |
| String about = "Info"; |
| |
| // Do NOT add any constructors here, unless... |
| |
| public static ResponseInfo $about(String about) { |
| ResponseInfo info = new ResponseInfo(); |
| info.about = about; |
| return info; |
| } |
| |
| public ResponseInfo about(String about) { |
| this.about = about; |
| return this; |
| } |
| |
| public String about() { |
| return about; |
| } |
| |
| public ResponseInfo _(String key, Object value) { |
| items.add(Item.of(key, value, false)); |
| return this; |
| } |
| |
| public ResponseInfo _(String key, String url, Object anchor) { |
| items.add(Item.of(key, url, anchor)); |
| return this; |
| } |
| |
| //Value is raw HTML and shouldn't be escaped |
| public ResponseInfo _r(String key, Object value) { |
| items.add(Item.of(key, value, true)); |
| return this; |
| } |
| |
| public void clear() { |
| items.clear(); |
| } |
| |
| @Override |
| public Iterator<Item> iterator() { |
| return items.iterator(); |
| } |
| } |