Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
AggregationGroupId |
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| 1.4;1.4 | ||||
AggregationGroupId$Builder |
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| 1.4;1.4 |
1 | /* | |
2 | * #%L | |
3 | * AggregationGroupId.java - mongodb-async-driver - Allanbank Consulting, Inc. | |
4 | * %% | |
5 | * Copyright (C) 2011 - 2014 Allanbank Consulting, Inc. | |
6 | * %% | |
7 | * Licensed under the Apache License, Version 2.0 (the "License"); | |
8 | * you may not use this file except in compliance with the License. | |
9 | * You may obtain a copy of the License at | |
10 | * | |
11 | * http://www.apache.org/licenses/LICENSE-2.0 | |
12 | * | |
13 | * Unless required by applicable law or agreed to in writing, software | |
14 | * distributed under the License is distributed on an "AS IS" BASIS, | |
15 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
16 | * See the License for the specific language governing permissions and | |
17 | * limitations under the License. | |
18 | * #L% | |
19 | */ | |
20 | ||
21 | package com.allanbank.mongodb.builder; | |
22 | ||
23 | import com.allanbank.mongodb.bson.DocumentAssignable; | |
24 | import com.allanbank.mongodb.bson.Element; | |
25 | import com.allanbank.mongodb.bson.builder.impl.AbstractBuilder; | |
26 | import com.allanbank.mongodb.bson.builder.impl.DocumentBuilderImpl; | |
27 | import com.allanbank.mongodb.bson.element.DocumentElement; | |
28 | import com.allanbank.mongodb.bson.element.StringElement; | |
29 | ||
30 | /** | |
31 | * AggregationGroupId holds the information for the <tt>_id</tt> field in an | |
32 | * aggregate command's | |
33 | * {@link Aggregate.Builder#group(AggregationGroupId, AggregationGroupField...) | |
34 | * $group} pipeline operator. | |
35 | * | |
36 | * @see <a href= | |
37 | * "http://docs.mongodb.org/manual/reference/aggregation/#_S_group">MongoDB | |
38 | * Aggregate Command $group Operator</a> | |
39 | * @api.yes This class is part of the driver's API. Public and protected members | |
40 | * will be deprecated for at least 1 non-bugfix release (version | |
41 | * numbers are <major>.<minor>.<bugfix>) before being | |
42 | * removed or modified. | |
43 | * @copyright 2012-2013, Allanbank Consulting, Inc., All Rights Reserved | |
44 | */ | |
45 | public class AggregationGroupId { | |
46 | ||
47 | /** | |
48 | * Constructs a {@link AggregationGroupId} with a constant value. | |
49 | * | |
50 | * @param value | |
51 | * The value of the _id. | |
52 | * @return The AggregationGroupId with a constant value. | |
53 | * @see <a href= | |
54 | * "http://docs.mongodb.org/manual/reference/aggregation/#_S_group">MongoDB | |
55 | * Aggregate Command $group Operator</a> | |
56 | */ | |
57 | public static AggregationGroupId constantId(final String value) { | |
58 | 1 | return new AggregationGroupId(value); |
59 | } | |
60 | ||
61 | /** | |
62 | * Creates a builder to construct a complex _id value for the group. | |
63 | * | |
64 | * @return The builder for the aggregation $group's id. | |
65 | * @see <a href= | |
66 | * "http://docs.mongodb.org/manual/reference/aggregation/#_S_group">MongoDB | |
67 | * Aggregate Command $group Operator</a> | |
68 | */ | |
69 | public static AggregationGroupId.Builder id() { | |
70 | 5 | return new AggregationGroupId.Builder(); |
71 | } | |
72 | ||
73 | /** | |
74 | * Constructs a {@link AggregationGroupId} with a value from a single field | |
75 | * in the source documents. | |
76 | * | |
77 | * @param fieldRef | |
78 | * The field name in the source documents to use in constructing | |
79 | * the _id of the group'd documents. If the <tt>fieldRef</tt> | |
80 | * does not start with a '$' then one will be added. | |
81 | * @return The AggregationGroupId with a single field value reference (which | |
82 | * may resolve to a complex sub-document). | |
83 | * @see <a href= | |
84 | * "http://docs.mongodb.org/manual/reference/aggregation/#_S_group">MongoDB | |
85 | * Aggregate Command $group Operator</a> | |
86 | */ | |
87 | public static AggregationGroupId id(final String fieldRef) { | |
88 | 4 | if (!fieldRef.startsWith("$")) { |
89 | 3 | return new AggregationGroupId("$" + fieldRef); |
90 | } | |
91 | ||
92 | 1 | return new AggregationGroupId(fieldRef); |
93 | } | |
94 | ||
95 | /** The id element. */ | |
96 | private final Element myIdElement; | |
97 | ||
98 | /** | |
99 | * Creates a new AggregationGroupId. | |
100 | * | |
101 | * @param builder | |
102 | * The builder containing the details of the id. | |
103 | */ | |
104 | 5 | public AggregationGroupId(final DocumentAssignable builder) { |
105 | 5 | myIdElement = new DocumentElement("_id", builder.asDocument()); |
106 | 5 | } |
107 | ||
108 | /** | |
109 | * Creates a new AggregationGroupId. | |
110 | * | |
111 | * @param value | |
112 | * The value for the simple group id. | |
113 | */ | |
114 | 5 | public AggregationGroupId(final String value) { |
115 | 5 | myIdElement = new StringElement("_id", value); |
116 | 5 | } |
117 | ||
118 | /** | |
119 | * Returns the element for the group operator's id. | |
120 | * | |
121 | * @return The element for the group operator's id. | |
122 | */ | |
123 | public Element toElement() { | |
124 | 10 | return myIdElement; |
125 | } | |
126 | ||
127 | /** | |
128 | * Builder provides the ability to construct a complex | |
129 | * {@link AggregationGroupId}. | |
130 | * <p> | |
131 | * This {@link Builder} also implements the | |
132 | * {@link com.allanbank.mongodb.bson.builder.DocumentBuilder} interface to | |
133 | * allow the construction of arbitrarily complex id documents. | |
134 | * </p> | |
135 | * | |
136 | * @api.yes This class is part of the driver's API. Public and protected | |
137 | * members will be deprecated for at least 1 non-bugfix release | |
138 | * (version numbers are <major>.<minor>.<bugfix>) | |
139 | * before being removed or modified. | |
140 | * @copyright 2012-2013, Allanbank Consulting, Inc., All Rights Reserved | |
141 | */ | |
142 | public static class Builder extends DocumentBuilderImpl { | |
143 | ||
144 | /** | |
145 | * Creates a new Builder. | |
146 | */ | |
147 | public Builder() { | |
148 | 5 | super((AbstractBuilder) null); |
149 | 5 | } |
150 | ||
151 | /** | |
152 | * Adds a field reference to the id document. The output field name is | |
153 | * the same as the input field. | |
154 | * <p> | |
155 | * This method is equivalent to {@link #addField(String, String) | |
156 | * addField(<fieldRef>, <fieldRef>)} with appropriate | |
157 | * handling for the '$' prefix. | |
158 | * </p> | |
159 | * | |
160 | * @param fieldRef | |
161 | * The dotted field path for the field to use. If the | |
162 | * <tt>fieldRef</tt> does not start with a '$' then one will | |
163 | * be added. | |
164 | * @return This builder for chaining method calls. | |
165 | */ | |
166 | public Builder addField(final String fieldRef) { | |
167 | 6 | if (!fieldRef.startsWith("$")) { |
168 | 5 | add(new StringElement(fieldRef, "$" + fieldRef)); |
169 | } | |
170 | else { | |
171 | 1 | add(new StringElement(fieldRef.substring(1), fieldRef)); |
172 | } | |
173 | 6 | return this; |
174 | } | |
175 | ||
176 | /** | |
177 | * Adds a field reference to the id document. | |
178 | * | |
179 | * @param name | |
180 | * The name of the field in the id document. | |
181 | * @param fieldRef | |
182 | * The dotted field path for the field to use. If the | |
183 | * <tt>fieldRef</tt> does not start with a '$' then one will | |
184 | * be added. | |
185 | * @return This builder for chaining method calls. | |
186 | */ | |
187 | public Builder addField(final String name, final String fieldRef) { | |
188 | 4 | if (!fieldRef.startsWith("$")) { |
189 | 3 | add(new StringElement(name, "$" + fieldRef)); |
190 | } | |
191 | else { | |
192 | 1 | add(new StringElement(name, fieldRef)); |
193 | } | |
194 | 4 | return this; |
195 | } | |
196 | ||
197 | /** | |
198 | * Constructs a new {@link AggregationGroupId} object from the state of | |
199 | * the builder. | |
200 | * | |
201 | * @return The new {@link AggregationGroupId} object. | |
202 | */ | |
203 | public AggregationGroupId buildId() { | |
204 | 4 | return new AggregationGroupId(this); |
205 | } | |
206 | } | |
207 | } |