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Removing JSON elements with Jackson [BAEL-6511] (#14291) 

* Removing JSON elements with Jackson [BAEL-6511]

This commit adds a test class for removing JSON elements using the Jackson library.

* Removing JSON elements with Jackson [BAEL-6511]

This PR adds a test class for removing JSON elements using the Jackson library.
This commit is contained in:
Mo Helmy 2023-06-27 03:26:45 +03:00 committed by GitHub
parent c67171f37d
commit 5e3bf803f4
1 changed files with 48 additions and 0 deletions
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48
jackson-modules/jackson-core/src/test/java/com/baeldung/jackson/jsonnode/RemoveJsonElementsUnitTest.java Normal file
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package com.baeldung.jackson.jsonnode;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.node.ObjectNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.JsonNode;
import org.junit.jupiter.api.Assertions;
import java.util.Iterator;
import org.junit.Test;
public class RemoveJsonElementsUnitTest {
@Test
public void given_JsonData_whenUsingJackson_thenRemoveElementByKey() throws JsonProcessingException {
String json = "{\"name\": \"John\", \"age\": 30, \"city\": \"New York\"}";
ObjectMapper objectMapper = new ObjectMapper();
JsonNode jsonNode = objectMapper.readTree(json);
ObjectNode object = (ObjectNode) jsonNode;
object.remove("age");
String updatedJson = objectMapper.writeValueAsString(object);
Assertions.assertEquals("{\"name\":\"John\",\"city\":\"New York\"}", updatedJson);
}
@Test
public void given_JsonData_whenUsingJackson_thenRemoveElementsByCondition() throws JsonProcessingException {
String json = "{\"name\": \"John\", \"age\": 30, \"city\": \"New York\"}";
ObjectMapper objectMapper = new ObjectMapper();
JsonNode jsonNode = objectMapper.readTree(json);
Iterator<JsonNode> elements = jsonNode.elements();
while (elements.hasNext()) {
JsonNode element = elements.next();
if (element.isNumber() && element.asInt() == 30) {
elements.remove();
}
}
String updatedJson = objectMapper.writeValueAsString(jsonNode);
Assertions.assertEquals("{\"name\":\"John\",\"city\":\"New York\"}", updatedJson);
}
@Test
public void given_JsonData_whenUsingJackson_thenRemoveElementFromNestedStructure() throws JsonProcessingException {
String json = "{\"name\": \"John\", \"details\": {\"age\": 30, \"city\": \"New York\"}}";
ObjectMapper objectMapper = new ObjectMapper();
JsonNode jsonNode = objectMapper.readTree(json);
JsonNode detailsNode = jsonNode.path("details");
((ObjectNode) detailsNode).remove("age");
String updatedJson = objectMapper.writeValueAsString(jsonNode);
Assertions.assertEquals("{\"name\":\"John\",\"details\":{\"city\":\"New York\"}}", updatedJson);
}
}