1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.devacfr.maven.skins.reflow.snippet;
20
21 import java.util.ArrayList;
22
23 import org.jsoup.internal.StringUtil;
24
25 /**
26 * @author Christophe Friederich
27 * @version 2.4
28 */
29 public class Components extends ArrayList<Component<?>> {
30
31 /** */
32 private static final long serialVersionUID = 1L;
33
34 /** */
35 private static final Components EMPTY = new Components();
36
37 /** */
38 public static Components empty() {
39 return EMPTY;
40 }
41
42 /**
43 *
44 */
45 public Components() {
46 }
47
48 /**
49 * @return
50 */
51 public String html() {
52 final StringBuilder sb = StringUtil.borrowBuilder();
53 for (final Component<?> component : this) {
54 if (sb.length() != 0) {
55 sb.append("\n");
56 }
57 final String html = component.getHtml();
58 if (html != null) {
59 sb.append(html);
60 }
61 }
62 return StringUtil.releaseBuilder(sb);
63 }
64
65 /**
66 * Get the first matched element.
67 *
68 * @return The first matched component, or <code>null</code> if contents is empty.
69 */
70 public Component<?> first() {
71 return isEmpty() ? null : get(0);
72 }
73
74 /**
75 * Get the last matched component.
76 *
77 * @return The last matched component, or <code>null</code> if contents is empty.
78 */
79 public Component<?> last() {
80 return isEmpty() ? null : get(size() - 1);
81 }
82 }