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Piotr Bugara
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#37 Added tests for add operation which add field if it doesn't exist or it is equal to null. Added examples in README.md
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‎README.md

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@@ -27,6 +27,7 @@ Its features are:
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* {de,}serialization of JSON Patch and JSON Merge Patch instances with Jackson;
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* full support for RFC 6902 operations, including `test`;
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* JSON "diff" (RFC 6902 only) with operation factorization.
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* support for `JsonPointer` and `JsonPath`
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## Versions
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@@ -264,6 +265,129 @@ final JsonNode patched = patch.apply(orig);
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}
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```
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<br />
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### Add if not exists
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It's possible to add element to JsonNode if it does not exist using JsonPath expressions [see more examples of JsonPath](#jsonpath-examples)
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* Add `color` field to `bicycle` object if it doesn't exist
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`{ "op": "add", "path": "$.store.bicycle[?([email protected])].color", "value": "red" }`
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Before:
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```json
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{
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"store": {
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"bicycle": {
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"price": 19.95
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}
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}
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}
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```
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After:
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```json
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{
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"store": {
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"bicycle": {
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"price": 19.95,
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"color": "red"
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}
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}
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}
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```
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* Add value for `color` field to `bicycle` object if it is equal to `null`
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`{ "op": "add", "path": "$.store.bicycle[?(@.color == null)].color", "value": "red" }`
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Before:
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```json
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{
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"store": {
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"bicycle": {
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"price": 19.95,
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"color": null
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}
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}
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}
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```
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After:
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```json
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{
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"store": {
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"bicycle": {
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"price": 19.95,
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"color": "red"
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}
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}
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}
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```
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* Add field `pages` to `book` array if `book` does not contain this field, or it is equal to `null`
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`{ "op": "add", "path": "$..book[?([email protected] || @.pages == null)].pages", "value": 250 }`
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Before:
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```json
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{
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"store": {
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"book": [
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{
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"category": "reference",
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"author": "Nigel Rees",
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"title": "Sayings of the Century",
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"price": 8.95
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},
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{
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"category": "fiction",
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"author": "Herman Melville",
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"title": "Moby Dick",
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"isbn": "0-553-21311-3",
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"price": 8.99,
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"pages": null
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},
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{
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"category": "fiction",
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"author": "J.R.R. Tolkien",
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"title": "The Lord of the Rings",
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"isbn": "0-395-19395-8",
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"price": 22.99,
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"pages": 100
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}
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]
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}
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}
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```
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After:
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```json
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{
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"store": {
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"book": [
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{
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"category": "reference",
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"author": "Nigel Rees",
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"title": "Sayings of the Century",
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"price": 8.95,
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"pages": 250
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},
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{
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"category": "fiction",
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"author": "Herman Melville",
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"title": "Moby Dick",
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"isbn": "0-553-21311-3",
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"price": 8.99,
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"pages": 250
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},
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{
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"category": "fiction",
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"author": "J.R.R. Tolkien",
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"title": "The Lord of the Rings",
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"isbn": "0-395-19395-8",
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"price": 22.99,
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"pages": 100
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}
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]
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}
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}
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```
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### Remove operation
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* Remove element with name `a`

‎src/test/resources/jsonpatch/add.json

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@@ -1478,6 +1478,221 @@
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},
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"expensive": 10
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}
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},
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{
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"op": { "op": "add", "path": "$.store.bicycle[?([email protected])].color", "value": "red" },
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"node":
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{
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"store": {
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"bicycle": {
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"price": 19.95
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}
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},
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"expensive": 10
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},
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"expected":
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{
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"store": {
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"bicycle": {
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"color": "red",
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"price": 19.95
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}
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},
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"expensive": 10
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}
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},
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{
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"op": { "op": "add", "path": "$.store.bicycle[?(@.color == null)].color", "value": "red" },
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"node":
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{
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"store": {
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"bicycle": {
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"price": 19.95,
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"color": null
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}
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},
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"expensive": 10
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},
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"expected":
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{
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"store": {
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"bicycle": {
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"color": "red",
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"price": 19.95
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}
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},
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"expensive": 10
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}
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},
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{
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"op": { "op": "add", "path": "$.store.bicycle[?([email protected])].color", "value": "red" },
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"node":
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{
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"store": {
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"bicycle": {
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"color": "green",
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"price": 19.95
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}
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}
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},
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"expected":
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{
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"store": {
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"bicycle": {
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"color": "green",
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"price": 19.95
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}
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}
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}
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},
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{
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"op": { "op": "add", "path": "$..book[?([email protected] || @.pages == null)].pages", "value": 250 },
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"node":
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{
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"store": {
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"book": [
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{
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"category": "reference",
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"author": "Nigel Rees",
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"title": "Sayings of the Century",
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"price": 8.95
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},
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{
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"category": "fiction",
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"author": "Herman Melville",
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"title": "Moby Dick",
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"isbn": "0-553-21311-3",
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"price": 8.99,
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"pages": null
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},
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{
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"category": "fiction",
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"author": "J.R.R. Tolkien",
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"title": "The Lord of the Rings",
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"isbn": "0-395-19395-8",
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"price": 22.99,
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"pages": 100
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}
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],
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"bicycle": {
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"color": "red",
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"price": 19.95
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}
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},
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"expensive": 10
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},
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"expected":
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{
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"store": {
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"book": [
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{
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"category": "reference",
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"author": "Nigel Rees",
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"title": "Sayings of the Century",
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"price": 8.95,
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"pages": 250
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},
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{
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"category": "fiction",
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"author": "Herman Melville",
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"title": "Moby Dick",
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"isbn": "0-553-21311-3",
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"price": 8.99,
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"pages": 250
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},
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{
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"category": "fiction",
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"author": "J.R.R. Tolkien",
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"title": "The Lord of the Rings",
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"isbn": "0-395-19395-8",
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"price": 22.99,
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"pages": 100
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}
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],
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"bicycle": {
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"color": "red",
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"price": 19.95
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}
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},
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"expensive": 10
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}
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},
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{
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"op": { "op": "add", "path": "$..book[?([email protected])].pages", "value": 250 },
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"node":
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{
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"store": {
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"book": [
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{
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"category": "reference",
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"author": "Nigel Rees",
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"title": "Sayings of the Century",
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"price": 8.95
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},
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{
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"category": "fiction",
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"author": "Herman Melville",
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"title": "Moby Dick",
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"isbn": "0-553-21311-3",
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"price": 8.99,
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"pages": null
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},
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{
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"category": "fiction",
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"author": "J.R.R. Tolkien",
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"title": "The Lord of the Rings",
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"isbn": "0-395-19395-8",
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"price": 22.99,
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"pages": 100
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}
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],
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"bicycle": {
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"color": "red",
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"price": 19.95
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}
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},
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"expensive": 10
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},
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"expected":
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{
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"store": {
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"book": [
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{
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"category": "reference",
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"author": "Nigel Rees",
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"title": "Sayings of the Century",
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"price": 8.95,
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"pages": 250
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},
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{
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"category": "fiction",
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"author": "Herman Melville",
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"title": "Moby Dick",
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"isbn": "0-553-21311-3",
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"price": 8.99,
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"pages": null
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},
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{
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"category": "fiction",
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"author": "J.R.R. Tolkien",
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"title": "The Lord of the Rings",
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"isbn": "0-395-19395-8",
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"price": 22.99,
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"pages": 100
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}
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],
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"bicycle": {
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"color": "red",
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"price": 19.95
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}
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},
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"expensive": 10
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}
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}
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]
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}

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