2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2019 Nordix Foundation.
4 * ================================================================================
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
17 * SPDX-License-Identifier: Apache-2.0
18 * ============LICENSE_END=========================================================
20 package org.onap.ccsdk.cds.blueprintsprocessor
22 import com.fasterxml.jackson.databind.JsonNode
23 import com.fasterxml.jackson.databind.ObjectMapper
24 import com.fasterxml.jackson.databind.node.ContainerNode
25 import com.fasterxml.jackson.databind.node.MissingNode
26 import com.fasterxml.jackson.databind.node.ObjectNode
27 import com.schibsted.spt.data.jslt.Parser
29 class JsonNormalizer {
33 fun getNormalizer(mapper: ObjectMapper, jsltSpec: JsonNode): (String) -> String {
34 if (jsltSpec is MissingNode) {
38 val input = mapper.readTree(s)
39 val expandedJstlSpec = expandJstlSpec(jsltSpec)
40 val jslt = Parser.compileString(expandedJstlSpec)
41 val output = jslt.apply(input)
47 * Creates an extended JSTL spec by appending the "*: ." wildcard pattern to every inner JSON object, and
48 * removing the extra quotes added by the standard YAML/JSON converters on fields prefixed by "?".
50 * @param jstlSpec the JSTL spec as a structured JSON object.
51 * @return the string representation of the extended JSTL spec.
53 private fun expandJstlSpec(jstlSpec: JsonNode): String {
54 val extendedJstlSpec = updateObjectNodes(jstlSpec, "*", ".")
55 return extendedJstlSpec.toString()
56 // Handle the "?" as a prefix to literal/non-quoted values
57 .replace("\"\\?([^\"]+)\"".toRegex(), "$1")
58 // Also, remove the quotes added by Jackson for key and value of the wildcard matcher
59 .replace("\"([.*])\"".toRegex(), "$1")
63 * Expands a structured JSON object, by adding the given key and value to every nested ObjectNode.
65 * @param jsonNode the root node.
66 * @param fieldName the fixed field name.
67 * @param fieldValue the fixed field value.
69 private fun updateObjectNodes(jsonNode: JsonNode, fieldName: String, fieldValue: String): JsonNode {
70 if (jsonNode is ContainerNode<*>) {
71 (jsonNode as? ObjectNode)?.put(fieldName, fieldValue)
72 jsonNode.forEach { child ->
73 updateObjectNodes(child, fieldName, fieldValue)