chengfan | c58d4be | 2016-09-20 10:33:12 +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.protocol.restconf.server.utils.parser.json; |
| 18 | |
| 19 | import com.fasterxml.jackson.databind.JsonNode; |
| 20 | import com.fasterxml.jackson.databind.node.ArrayNode; |
| 21 | import com.fasterxml.jackson.databind.node.JsonNodeType; |
| 22 | import org.onosproject.protocol.restconf.server.utils.exceptions.JsonParseException; |
| 23 | import org.onosproject.protocol.restconf.server.utils.parser.api.JsonListener; |
chengfan | 7b2a60b | 2016-10-08 20:27:15 +0800 | [diff] [blame] | 24 | import org.onosproject.protocol.restconf.server.utils.parser.api.NormalizedYangNode; |
chengfan | c58d4be | 2016-09-20 10:33:12 +0800 | [diff] [blame] | 25 | import org.onosproject.yms.ydt.YdtBuilder; |
| 26 | import org.onosproject.yms.ydt.YdtContext; |
| 27 | import org.slf4j.Logger; |
| 28 | |
chengfan | c58d4be | 2016-09-20 10:33:12 +0800 | [diff] [blame] | 29 | import java.util.Iterator; |
Vidyashree Rama | c1fa708 | 2016-11-14 19:33:13 +0530 | [diff] [blame] | 30 | import java.util.LinkedHashSet; |
chengfan | c58d4be | 2016-09-20 10:33:12 +0800 | [diff] [blame] | 31 | import java.util.Set; |
chengfan | 7b2a60b | 2016-10-08 20:27:15 +0800 | [diff] [blame] | 32 | import java.util.Stack; |
chengfan | c58d4be | 2016-09-20 10:33:12 +0800 | [diff] [blame] | 33 | |
| 34 | import static com.fasterxml.jackson.databind.node.JsonNodeType.ARRAY; |
| 35 | import static com.google.common.base.Strings.isNullOrEmpty; |
chengfan | 7b2a60b | 2016-10-08 20:27:15 +0800 | [diff] [blame] | 36 | import static org.onosproject.protocol.restconf.server.utils.parser.json.ParserUtils.buildNormalizedNode; |
chengfan | c58d4be | 2016-09-20 10:33:12 +0800 | [diff] [blame] | 37 | import static org.onosproject.yms.ydt.YdtType.MULTI_INSTANCE_NODE; |
| 38 | import static org.onosproject.yms.ydt.YdtType.SINGLE_INSTANCE_NODE; |
| 39 | import static org.slf4j.LoggerFactory.getLogger; |
| 40 | |
| 41 | /** |
| 42 | * Represents default implementation of codec JSON listener. |
| 43 | */ |
| 44 | public class JsonToYdtListener implements JsonListener { |
| 45 | |
| 46 | private static final String INPUT_FIELD_NAME = "input"; |
| 47 | private static final String COLON = ":"; |
| 48 | private static final int INPUT_FIELD_LENGTH = 2; |
| 49 | private static final String E_UNSUP_TYPE = "Unsupported node type %s " + |
| 50 | "field name is %s fieldName"; |
Henry Yu | dc747af | 2016-11-16 13:29:54 -0500 | [diff] [blame^] | 51 | private static final String EMPTY_STRING = "null"; |
chengfan | c58d4be | 2016-09-20 10:33:12 +0800 | [diff] [blame] | 52 | |
| 53 | private Logger log = getLogger(getClass()); |
| 54 | |
| 55 | private YdtBuilder ydtBuilder; |
chengfan | 7b2a60b | 2016-10-08 20:27:15 +0800 | [diff] [blame] | 56 | private NormalizedYangNode defaultMultiInsNode; |
| 57 | private Stack<NormalizedYangNode> nameStack = new Stack<>(); |
chengfan | c58d4be | 2016-09-20 10:33:12 +0800 | [diff] [blame] | 58 | private YdtContext rpcModule; |
chengfan | 7b2a60b | 2016-10-08 20:27:15 +0800 | [diff] [blame] | 59 | private boolean isListArray = false; |
chengfan | c58d4be | 2016-09-20 10:33:12 +0800 | [diff] [blame] | 60 | |
| 61 | /** |
| 62 | * Creates a listener for the process of a Json Object, the listener will |
| 63 | * try to transfer the JSON object to a Ydt builder. |
| 64 | * |
| 65 | * @param ydtBuilder the YDT builder to build a YDT object |
| 66 | */ |
| 67 | public JsonToYdtListener(YdtBuilder ydtBuilder) { |
| 68 | this.ydtBuilder = ydtBuilder; |
| 69 | } |
| 70 | |
| 71 | @Override |
| 72 | public void enterJsonNode(String fieldName, JsonNode node) { |
| 73 | if (isNullOrEmpty(fieldName)) { |
chengfan | 7b2a60b | 2016-10-08 20:27:15 +0800 | [diff] [blame] | 74 | if (defaultMultiInsNode != null) { |
| 75 | ydtBuilder.addChild(defaultMultiInsNode.getName(), |
| 76 | defaultMultiInsNode.getNamespace(), |
chengfan | c58d4be | 2016-09-20 10:33:12 +0800 | [diff] [blame] | 77 | MULTI_INSTANCE_NODE); |
| 78 | } |
| 79 | return; |
| 80 | } |
chengfan | 7b2a60b | 2016-10-08 20:27:15 +0800 | [diff] [blame] | 81 | NormalizedYangNode normalizedNode = buildNormalizedNode(fieldName); |
chengfan | c58d4be | 2016-09-20 10:33:12 +0800 | [diff] [blame] | 82 | JsonNodeType nodeType = node.getNodeType(); |
| 83 | switch (nodeType) { |
| 84 | case OBJECT: |
chengfan | 7b2a60b | 2016-10-08 20:27:15 +0800 | [diff] [blame] | 85 | processObjectNode(normalizedNode); |
chengfan | c58d4be | 2016-09-20 10:33:12 +0800 | [diff] [blame] | 86 | break; |
| 87 | |
| 88 | case ARRAY: |
chengfan | 7b2a60b | 2016-10-08 20:27:15 +0800 | [diff] [blame] | 89 | processArrayNode(normalizedNode, node); |
chengfan | c58d4be | 2016-09-20 10:33:12 +0800 | [diff] [blame] | 90 | break; |
| 91 | |
| 92 | //TODO for now, just process the following three node type |
| 93 | case STRING: |
| 94 | case NUMBER: |
| 95 | case BOOLEAN: |
chengfan | 7b2a60b | 2016-10-08 20:27:15 +0800 | [diff] [blame] | 96 | processLeafNode(normalizedNode, node.asText()); |
chengfan | c58d4be | 2016-09-20 10:33:12 +0800 | [diff] [blame] | 97 | break; |
| 98 | |
| 99 | case BINARY: |
| 100 | case MISSING: |
| 101 | case NULL: |
| 102 | case POJO: |
| 103 | log.debug("Unimplemented node type {}", nodeType); |
| 104 | break; |
| 105 | |
| 106 | default: |
| 107 | throw new JsonParseException(String.format(E_UNSUP_TYPE, |
| 108 | nodeType, fieldName)); |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | @Override |
| 113 | public void exitJsonNode(JsonNode jsonNode) { |
chengfan | 0c32d71 | 2016-10-11 21:03:23 +0800 | [diff] [blame] | 114 | |
| 115 | if (isListArray) { |
| 116 | isListArray = false; |
| 117 | ydtBuilder.traverseToParent(); |
chengfan | c58d4be | 2016-09-20 10:33:12 +0800 | [diff] [blame] | 118 | return; |
| 119 | } |
chengfan | 7b2a60b | 2016-10-08 20:27:15 +0800 | [diff] [blame] | 120 | |
chengfan | 0c32d71 | 2016-10-11 21:03:23 +0800 | [diff] [blame] | 121 | if (jsonNode.getNodeType() == ARRAY) { |
| 122 | //check empty before pop |
| 123 | if (nameStack.empty()) { |
| 124 | return; |
| 125 | } |
chengfan | 7b2a60b | 2016-10-08 20:27:15 +0800 | [diff] [blame] | 126 | nameStack.pop(); |
chengfan | 0c32d71 | 2016-10-11 21:03:23 +0800 | [diff] [blame] | 127 | //check empty after pop |
chengfan | 7b2a60b | 2016-10-08 20:27:15 +0800 | [diff] [blame] | 128 | if (nameStack.empty()) { |
| 129 | return; |
| 130 | } |
| 131 | defaultMultiInsNode = nameStack.get(nameStack.size() - 1); |
| 132 | return; |
| 133 | } |
chengfan | 7b2a60b | 2016-10-08 20:27:15 +0800 | [diff] [blame] | 134 | |
chengfan | c58d4be | 2016-09-20 10:33:12 +0800 | [diff] [blame] | 135 | ydtBuilder.traverseToParent(); |
chengfan | 7b2a60b | 2016-10-08 20:27:15 +0800 | [diff] [blame] | 136 | } |
chengfan | c58d4be | 2016-09-20 10:33:12 +0800 | [diff] [blame] | 137 | |
chengfan | 7b2a60b | 2016-10-08 20:27:15 +0800 | [diff] [blame] | 138 | private void processObjectNode(NormalizedYangNode node) { |
| 139 | ydtBuilder.addChild(node.getName(), node.getNamespace(), |
| 140 | SINGLE_INSTANCE_NODE); |
| 141 | } |
| 142 | |
| 143 | private void processLeafNode(NormalizedYangNode node, String value) { |
Henry Yu | dc747af | 2016-11-16 13:29:54 -0500 | [diff] [blame^] | 144 | String leafValue = value.equalsIgnoreCase(EMPTY_STRING) ? null : value; |
| 145 | ydtBuilder.addLeaf(node.getName(), node.getNamespace(), leafValue); |
chengfan | 7b2a60b | 2016-10-08 20:27:15 +0800 | [diff] [blame] | 146 | } |
| 147 | |
| 148 | private void processArrayNode(NormalizedYangNode normalizedNode, |
| 149 | JsonNode node) { |
| 150 | ArrayNode arrayNode = (ArrayNode) node; |
| 151 | if (arrayNode.size() == 0) { |
chengfan | c58d4be | 2016-09-20 10:33:12 +0800 | [diff] [blame] | 152 | return; |
| 153 | } |
Vidyashree Rama | c1fa708 | 2016-11-14 19:33:13 +0530 | [diff] [blame] | 154 | Set<String> sets = new LinkedHashSet<>(); |
chengfan | c58d4be | 2016-09-20 10:33:12 +0800 | [diff] [blame] | 155 | Iterator<JsonNode> elements = arrayNode.elements(); |
| 156 | boolean isLeafList = true; |
| 157 | while (elements.hasNext()) { |
| 158 | JsonNode element = elements.next(); |
| 159 | JsonNodeType eleType = element.getNodeType(); |
| 160 | |
| 161 | if (eleType == JsonNodeType.STRING || |
| 162 | eleType == JsonNodeType.NUMBER || |
| 163 | eleType == JsonNodeType.BOOLEAN) { |
| 164 | sets.add(element.asText()); |
| 165 | } else { |
| 166 | isLeafList = false; |
| 167 | } |
| 168 | } |
| 169 | if (isLeafList) { |
| 170 | //leaf-list |
chengfan | 7b2a60b | 2016-10-08 20:27:15 +0800 | [diff] [blame] | 171 | ydtBuilder.addLeaf(normalizedNode.getName(), |
| 172 | normalizedNode.getNamespace(), sets); |
| 173 | isListArray = true; |
chengfan | c58d4be | 2016-09-20 10:33:12 +0800 | [diff] [blame] | 174 | } else { |
chengfan | 7b2a60b | 2016-10-08 20:27:15 +0800 | [diff] [blame] | 175 | defaultMultiInsNode = normalizedNode; |
| 176 | nameStack.push(defaultMultiInsNode); |
chengfan | c58d4be | 2016-09-20 10:33:12 +0800 | [diff] [blame] | 177 | } |
| 178 | } |
| 179 | } |