Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
Bulk |
|
| 2.2;2.2 | ||||
Bulk$1 |
|
| 2.2;2.2 | ||||
Bulk$1$1 |
|
| 2.2;2.2 |
1 | /** | |
2 | * Copyright (c) 2013-2017, jcabi.com | |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: 1) Redistributions of source code must retain the above | |
8 | * copyright notice, this list of conditions and the following | |
9 | * disclaimer. 2) Redistributions in binary form must reproduce the above | |
10 | * copyright notice, this list of conditions and the following | |
11 | * disclaimer in the documentation and/or other materials provided | |
12 | * with the distribution. 3) Neither the name of the jcabi.com nor | |
13 | * the names of its contributors may be used to endorse or promote | |
14 | * products derived from this software without specific prior written | |
15 | * permission. | |
16 | * | |
17 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
18 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT | |
19 | * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND | |
20 | * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL | |
21 | * THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, | |
22 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
23 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
24 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
25 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
26 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
27 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
28 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
29 | */ | |
30 | package com.jcabi.github; | |
31 | ||
32 | import java.lang.reflect.InvocationHandler; | |
33 | import java.lang.reflect.InvocationTargetException; | |
34 | import java.lang.reflect.Method; | |
35 | import java.lang.reflect.Proxy; | |
36 | import java.util.Iterator; | |
37 | import javax.json.JsonObject; | |
38 | import lombok.EqualsAndHashCode; | |
39 | ||
40 | /** | |
41 | * Bulk items, with pre-saved JSON. | |
42 | * | |
43 | * <p>This class should be used as a decorator for object obtained | |
44 | * from Github, when you want to keep their JSON values in memory. For | |
45 | * example: | |
46 | * | |
47 | * <pre> Iterable<Issue> issues = repo.issues().iterate( | |
48 | * new HashMap<String, String>() | |
49 | * ); | |
50 | * for (Issue issue : issues) { | |
51 | * System.out.println(new Issue.Smart(issue).title()); | |
52 | * }</pre> | |
53 | * | |
54 | * <p>Let's say, there are 50 issues in Github's repo. This code will | |
55 | * make 52 HTTP requests to Github. The first one will fetch the first | |
56 | * 30 issues in JSON array. Then, for every one of them, in order | |
57 | * to retrieve issue title a separate HTTP request will be made. Then, | |
58 | * one more page will be fetched, with 20 issues. And again, 20 new | |
59 | * HTTP requests to get their titles. | |
60 | * | |
61 | * <p>Class {@code Bulk} helps us to reduce the amount of this extra work: | |
62 | * | |
63 | * <pre> Iterable<Issue> issues = new Bulk<Issue>( | |
64 | * repo.issues().iterate( | |
65 | * new HashMap<String, String>() | |
66 | * ) | |
67 | * );</pre> | |
68 | * | |
69 | * <p>Now, there will be just two HTTP requests. | |
70 | * | |
71 | * @author Yegor Bugayenko (yegor@tpc2.com) | |
72 | * @version $Id: 6db3339b902ff2aaa71820c94cb3c701141bec7b $ | |
73 | * @since 0.4 | |
74 | * @param <T> Type of iterable objects | |
75 | * @see <a href="http://developer.github.com/v3/#pagination">Pagination</a> | |
76 | */ | |
77 | 0 | @EqualsAndHashCode(of = "origin") |
78 | public final class Bulk<T extends JsonReadable> implements Iterable<T> { | |
79 | ||
80 | /** | |
81 | * Original iterable. | |
82 | */ | |
83 | private final transient Iterable<T> origin; | |
84 | ||
85 | /** | |
86 | * Public ctor. | |
87 | * @param items Items original | |
88 | * @checkstyle AnonInnerLength (50 lines) | |
89 | */ | |
90 | @SuppressWarnings("unchecked") | |
91 | 2 | public Bulk(final Iterable<T> items) { |
92 | 2 | if (items instanceof RtPagination) { |
93 | 1 | final RtPagination<T> page = RtPagination.class.cast(items); |
94 | 1 | final RtValuePagination.Mapping<T, JsonObject> mapping = |
95 | 1 | page.mapping(); |
96 | 1 | this.origin = new RtPagination<T>( |
97 | 1 | page.request(), |
98 | 2 | new RtValuePagination.Mapping<T, JsonObject>() { |
99 | @Override | |
100 | public T map(final JsonObject object) { | |
101 | 1 | final T item = mapping.map(object); |
102 | 1 | return (T) Proxy.newProxyInstance( |
103 | 1 | Thread.currentThread().getContextClassLoader(), |
104 | 1 | item.getClass().getInterfaces(), |
105 | 1 | new InvocationHandler() { |
106 | @Override | |
107 | @SuppressWarnings("PMD.UseVarargs") | |
108 | public Object invoke(final Object proxy, | |
109 | final Method method, final Object[] args) { | |
110 | final Object result; | |
111 | 2 | if ("json".equals(method.getName())) { |
112 | 1 | result = object; |
113 | } else { | |
114 | try { | |
115 | 1 | result = method.invoke(item, args); |
116 | 0 | } catch ( |
117 | final IllegalAccessException ex | |
118 | ) { | |
119 | 0 | throw new IllegalStateException(ex); |
120 | 0 | } catch ( |
121 | final InvocationTargetException ex | |
122 | ) { | |
123 | 0 | throw new IllegalStateException(ex); |
124 | 1 | } |
125 | } | |
126 | 2 | return result; |
127 | } | |
128 | } | |
129 | ); | |
130 | } | |
131 | } | |
132 | ); | |
133 | 1 | } else { |
134 | 1 | this.origin = items; |
135 | } | |
136 | 2 | } |
137 | ||
138 | @Override | |
139 | public String toString() { | |
140 | 0 | return this.origin.toString(); |
141 | } | |
142 | ||
143 | @Override | |
144 | public Iterator<T> iterator() { | |
145 | 2 | return this.origin.iterator(); |
146 | } | |
147 | ||
148 | } |