| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
| AggregationGroupId |
|
| 1.4;1.4 | ||||
| AggregationGroupId$Builder |
|
| 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 | } |