Sithara Punnassery | 9306e6b | 2017-02-06 15:38:19 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2016-present Open Networking Laboratory |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package org.onosproject.config.model; |
| 18 | |
| 19 | import static org.onosproject.config.model.ModelConstants.NON_KEY_LEAF; |
| 20 | |
| 21 | /** |
| 22 | * Abstraction of an entity which represents leaf data tree node. |
| 23 | */ |
| 24 | public final class LeafNode extends DataNode { |
| 25 | |
| 26 | /** |
| 27 | * Leaf node value. |
| 28 | */ |
| 29 | private Object value; |
| 30 | |
| 31 | /** |
| 32 | * Returns value contained in leaf node. |
| 33 | * |
| 34 | * @return value contained in leaf node |
| 35 | */ |
| 36 | public Object value() { |
| 37 | return value; |
| 38 | } |
| 39 | |
| 40 | /** |
| 41 | * Returns value as string, for usage in serializers. |
| 42 | * |
| 43 | * @return string representation of value |
| 44 | */ |
| 45 | public String asString() { |
| 46 | return String.valueOf(value); |
| 47 | } |
| 48 | |
| 49 | /** |
| 50 | * Creates an instance of leaf node. |
| 51 | * |
| 52 | * @param builder leaf node builder |
| 53 | */ |
| 54 | public LeafNode(Builder builder) { |
| 55 | super(builder); |
| 56 | value = builder.value; |
| 57 | } |
| 58 | |
| 59 | /** |
| 60 | * Returns data node builder instance. |
| 61 | * |
| 62 | * @param name name of node |
| 63 | * @param nameSpace namespace of node |
| 64 | * @return data node builder instance |
| 65 | */ |
| 66 | public static Builder builder(String name, String nameSpace) { |
| 67 | return new Builder(name, nameSpace); |
| 68 | } |
| 69 | |
| 70 | /** |
| 71 | * Returns data node copy builder. |
| 72 | * |
| 73 | * @return data node copy builder |
| 74 | */ |
| 75 | @Override |
| 76 | public Builder copyBuilder() { |
| 77 | return new Builder(this); |
| 78 | } |
| 79 | |
| 80 | /** |
| 81 | * Builder with get and set functions to build leaf node, |
| 82 | * builder will be used both to create leaf node from scratch or from a |
| 83 | * given leaf node. |
| 84 | */ |
| 85 | public static final class Builder extends DataNode.Builder<Builder> { |
| 86 | |
| 87 | /** |
| 88 | * Leaf node value. |
| 89 | */ |
| 90 | private Object value; |
| 91 | |
| 92 | public Builder() { |
| 93 | } |
| 94 | |
| 95 | /** |
| 96 | * Creates an instance of data node builder. |
| 97 | * |
| 98 | * @param name name of node |
| 99 | * @param namespace namespace of node |
| 100 | */ |
| 101 | public Builder(String name, String namespace) { |
| 102 | keyBuilder = NodeKey.builder().schemaId(name, namespace); |
| 103 | } |
| 104 | |
| 105 | /** |
| 106 | * Creates an instance of leaf node copy builder. |
| 107 | * |
| 108 | * @param node old leaf node |
| 109 | */ |
| 110 | public Builder(LeafNode node) { |
| 111 | super(node); |
| 112 | value = node.value; |
| 113 | } |
| 114 | |
| 115 | /** |
| 116 | * Sets value of leaf node builder. |
| 117 | * |
| 118 | * @param value value |
| 119 | * @return leaf node builder |
| 120 | */ |
| 121 | public Builder value(Object value) { |
| 122 | this.value = value; |
| 123 | return this; |
| 124 | } |
| 125 | |
| 126 | @Override |
| 127 | public InnerNode.Builder createChildBuilder(String name, String nameSpace) { |
| 128 | throw new IllegalStateException("leaf node can't have a child " + |
| 129 | "node"); |
| 130 | } |
| 131 | |
| 132 | @Override |
| 133 | public LeafNode.Builder createChildBuilder(String name, String nameSpace, |
| 134 | Object value) { |
| 135 | throw new IllegalStateException("leaf node can't have a child " + |
| 136 | "node"); |
| 137 | } |
| 138 | |
| 139 | @Override |
| 140 | public InnerNode.Builder deleteChild(NodeKey key) { |
| 141 | throw new IllegalStateException("leaf node can't have a child " + |
| 142 | "node"); |
| 143 | } |
| 144 | |
| 145 | @Override |
| 146 | public InnerNode.Builder getChildBuilder(NodeKey key) { |
| 147 | throw new IllegalStateException("leaf node can't have a child " + |
| 148 | "node"); |
| 149 | } |
| 150 | |
| 151 | |
| 152 | @Override |
| 153 | public InnerNode.Builder addKeyLeaf(String name, String nameSpace, Object val) { |
| 154 | throw new IllegalStateException("leaf node can't have a key " + |
| 155 | "leaves node"); |
| 156 | } |
| 157 | |
| 158 | @Override |
| 159 | public Builder addLeafListValue(Object val) { |
| 160 | LeafListKey.LeafListKeyBuilder leafListKeyBuilder; |
| 161 | if (!(keyBuilder instanceof LeafListKey.LeafListKeyBuilder)) { |
| 162 | if (keyBuilder instanceof ListKey.ListKeyBuilder) { |
| 163 | throw new ModelException(NON_KEY_LEAF); |
| 164 | } |
| 165 | |
| 166 | leafListKeyBuilder = new LeafListKey.LeafListKeyBuilder(); |
| 167 | NodeKey key = keyBuilder.build(); |
| 168 | leafListKeyBuilder.schemaId(key.schemaId()); |
| 169 | } else { |
| 170 | leafListKeyBuilder = (LeafListKey.LeafListKeyBuilder) keyBuilder; |
| 171 | } |
| 172 | |
| 173 | leafListKeyBuilder.value(val); |
| 174 | keyBuilder = leafListKeyBuilder; |
| 175 | return this; |
| 176 | } |
| 177 | |
| 178 | /** |
| 179 | * Builds a leaf node object. |
| 180 | * |
| 181 | * @return leaf node |
| 182 | */ |
| 183 | @Override |
| 184 | public LeafNode build() { |
| 185 | if (type == null) { |
| 186 | throw new IllegalStateException("node should have a type."); |
| 187 | } |
| 188 | if (key == null) { |
| 189 | key = keyBuilder.build(); |
| 190 | } |
| 191 | return new LeafNode(this); |
| 192 | } |
| 193 | } |
| 194 | } |