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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.test.json;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.node.ObjectNode;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
/**
* Formats a {@link JsonNode} to a normalized JSON string, see {@link JsonTestHelper}.
*
* @author hakonhall
*/
class JsonNodeFormatter {
private final JsonBuilder builder;
/** See {@link JsonTestHelper}. */
static String toNormalizedJson(JsonNode jsonNode, boolean compact) {
JsonNodeFormatter formatter = new JsonNodeFormatter(compact);
formatter.appendValue(jsonNode);
return formatter.toString();
}
private JsonNodeFormatter(boolean compact) {
builder = compact ? JsonBuilder.forCompactJson() : JsonBuilder.forMultiLineJson(2);
}
private void appendValue(JsonNode jsonNode) {
switch (jsonNode.getNodeType()) {
case OBJECT -> {
ObjectNode objectNode = (ObjectNode) jsonNode;
ArrayList<String> fieldNames = new ArrayList<>();
objectNode.fieldNames().forEachRemaining(fieldNames::add);
Collections.sort(fieldNames);
if (fieldNames.isEmpty()) {
builder.append("{}");
} else {
boolean firstIteration = true;
for (var fieldName : fieldNames) {
if (firstIteration) {
builder.appendLineAndIndent("{", +1);
firstIteration = false;
} else {
builder.appendLineAndIndent(",");
}
builder.appendStringValue(fieldName);
builder.appendColon();
appendValue(objectNode.get(fieldName));
}
builder.newLineIndentAndAppend(-1, "}");
}
}
case ARRAY -> {
Iterator<JsonNode> elements = jsonNode.elements();
if (elements.hasNext()) {
builder.appendLineAndIndent("[", +1);
appendValue(elements.next());
while (elements.hasNext()) {
builder.appendLineAndIndent(",");
appendValue(elements.next());
}
builder.newLineIndentAndAppend(-1, "]");
} else {
builder.append("[]");
}
}
case BOOLEAN, NUMBER, NULL -> builder.append(jsonNode.asText());
case STRING -> builder.appendStringValue(jsonNode.asText());
case BINARY, MISSING, POJO -> throw new IllegalStateException(jsonNode.getNodeType().toString());
}
}
@Override
public String toString() { return builder.toString(); }
}
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