jodd-json/src/main/java/jodd/json/impl/KeyValueJsonSerializer.java
protected int serializeKeyValue(final JsonContext jsonContext, final Path currentPath, final Object key, final Object value, int count) {
		if ((value == null) && jsonContext.isExcludeNulls()) {
			return count;
		}

		if (key != null) {
			currentPath.push(key.toString());
		} else {
			currentPath.push(StringPool.NULL);
		}

		// check if we should include the field

		boolean include = true;

		if (value != null) {

			// + all collections are not serialized by default

			include = jsonContext.matchIgnoredPropertyTypes(value.getClass(), false, include);

			// + path queries: excludes/includes

			include = jsonContext.matchPathToQueries(include);
		}

		// done

		if (!include) {
			currentPath.pop();
			return count;
		}

		if (key == null) {
			jsonContext.pushName(null, count > 0);
		} else {
			jsonContext.pushName(key.toString(), count > 0);
		}

		jsonContext.serialize(value);

		if (jsonContext.isNamePopped()) {
			count++;
		}

		currentPath.pop();
		return count;
	}
protected int serializeKeyValue(final JsonContext jsonContext, final Path currentPath, final Object key, final Object value, int count) {
		if ((value == null) && jsonContext.isExcludeNulls()) {
			return count;
		}

		if (key != null) {
			currentPath.push(key.toString());
		} else {
			currentPath.push(StringPool.NULL);
		}

		// check if we should include the field

		boolean include = true;

		if (value != null) {

			// + all collections are not serialized by default

			include = jsonContext.matchIgnoredPropertyTypes(value.getClass(), false, include);

			// + path queries: excludes/includes

			include = jsonContext.matchPathToQueries(include);
		}

		// done

		if (!include) {
			currentPath.pop();
			return count;
		}

		if (key == null) {
			jsonContext.pushName(null, count > 0);
		} else {
			jsonContext.pushName(key.toString(), count > 0);
		}

		jsonContext.serialize(value);

		if (jsonContext.isNamePopped()) {
			count++;
		}

		currentPath.pop();
		return count;
	}
Serializes key and a value.