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Ramachandran Nellaiyappan
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[feat] #7 geojson data modeling added for LineString
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‎src/main/java/com/github/nramc/dev/journey/api/geojson/LineString.java‎

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package com.github.nramc.dev.journey.api.geojson;
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import com.fasterxml.jackson.annotation.JsonCreator;
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import com.github.nramc.dev.journey.api.geojson.types.GeoJsonType;
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import com.github.nramc.dev.journey.api.geojson.types.Position;
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import lombok.EqualsAndHashCode;
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import lombok.Getter;
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import lombok.ToString;
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import java.util.Collections;
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import java.util.List;
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@Getter
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@ToString
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@EqualsAndHashCode(callSuper = false)
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public final class LineString extends Geometry {
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private final List<Position> coordinates;
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public LineString(List<Position> coordinates) {
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super(GeoJsonType.LINE_STRING);
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if (coordinates.size() < 2) {
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throw new IllegalArgumentException("Invalid coordinates. Minimum 2 positions required");
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}
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this.coordinates = Collections.unmodifiableList(coordinates);
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}
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@JsonCreator
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public static LineString of(GeoJsonType type, List<Position> coordinates) {
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if (type != GeoJsonType.LINE_STRING) {
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throw new IllegalArgumentException(String.format("Invalid type. expected[%s] got:[%s]",
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GeoJsonType.LINE_STRING.getType(), type.getType()));
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}
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return new LineString(coordinates);
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}
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public static LineString of(List<Position> coordinates) {
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return of(GeoJsonType.LINE_STRING, coordinates);
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}
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}

‎src/test/java/com/github/nramc/dev/journey/api/geojson/LineStringTest.java‎

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package com.github.nramc.dev.journey.api.geojson;
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import com.github.nramc.dev.journey.api.geojson.types.GeoJsonType;
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import com.github.nramc.dev.journey.api.geojson.types.Position;
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import org.junit.jupiter.api.Test;
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import org.junit.jupiter.params.ParameterizedTest;
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import org.junit.jupiter.params.provider.ValueSource;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.boot.test.autoconfigure.json.JsonTest;
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import org.springframework.boot.test.json.JacksonTester;
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import org.springframework.boot.test.json.JsonContent;
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import java.io.IOException;
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import java.util.List;
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import static org.assertj.core.api.Assertions.assertThat;
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import static org.junit.jupiter.api.Assertions.assertThrows;
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@JsonTest
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class LineStringTest {
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@Autowired
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JacksonTester<LineString> jacksonTester;
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@Test
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void deserialization_withLongitudeAndLatitude() throws IOException {
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String json = """
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{
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"type": "LineString",
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"coordinates": [
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[100.0, 0.0],
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[101.0, 1.0]
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]
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}
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""";
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LineString object = jacksonTester.parseObject(json);
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assertThat(object).isNotNull()
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.satisfies(obj -> assertThat(obj.getType()).isEqualTo(GeoJsonType.LINE_STRING.getType()))
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.extracting(LineString::getCoordinates).asList().isNotEmpty()
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.hasSize(2)
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.containsExactly(Position.of(100.0, 0.0), Position.of(101.0, 1.0));
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}
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@Test
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void deserialization_withLongitudeAndLatitudeAndAltitude() throws IOException {
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String json = """
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{
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"type": "LineString",
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"coordinates": [
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[100.0, 0.0, 45.0],
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[101.0, 1.0, 45.0]
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]
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}
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""";
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LineString object = jacksonTester.parseObject(json);
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assertThat(object).isNotNull()
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.satisfies(obj -> assertThat(obj.getType()).isEqualTo(GeoJsonType.LINE_STRING.getType()))
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.extracting(LineString::getCoordinates).asList().isNotEmpty()
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.hasSize(2)
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.containsExactly(Position.of(100.0, 0.0, 45.0), Position.of(101.0, 1.0, 45.0));
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}
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@Test
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void deserialization_withLongitudeAndLatitudeAndAltitude_andWithManyCoordinates() throws IOException {
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String json = """
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{
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"type": "LineString",
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"coordinates": [
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[100.0, 51.0, 45.0],
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[101.0, 52.0, 45.0],
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[102.0, 53.0, 45.0],
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[103.0, 54.0, 45.0],
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[104.0, 55.0, 45.0],
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[105.0, 56.0, 45.0],
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[106.0, 57.0, 45.0],
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[107.0, 58.0, 45.0],
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[108.0, 59.0, 45.0],
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[109.0, 60.0, 45.0],
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[110.0, 61.0, 45.0]
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]
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}
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""";
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LineString object = jacksonTester.parseObject(json);
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assertThat(object).isNotNull()
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.satisfies(obj -> assertThat(obj.getType()).isEqualTo(GeoJsonType.LINE_STRING.getType()))
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.extracting(LineString::getCoordinates).asList().isNotEmpty()
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.hasSize(11)
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.containsExactly(
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Position.of(100.0, 51.0, 45.0),
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Position.of(101.0, 52.0, 45.0),
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Position.of(102.0, 53.0, 45.0),
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Position.of(103.0, 54.0, 45.0),
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Position.of(104.0, 55.0, 45.0),
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Position.of(105.0, 56.0, 45.0),
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Position.of(106.0, 57.0, 45.0),
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Position.of(107.0, 58.0, 45.0),
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Position.of(108.0, 59.0, 45.0),
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Position.of(109.0, 60.0, 45.0),
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Position.of(110.0, 61.0, 45.0)
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);
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}
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@ParameterizedTest
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@ValueSource(strings = {
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"""
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{
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"type": "invalidType",
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"coordinates": [
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[100.0, 0.0, 45.0],
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[101.0, 1.0, 45.0]
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]
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}
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""", """
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{
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"type": "LineString",
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"coordinates": [
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[190.0, 0.0, 45.0],
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[101.0, 1.0, 45.0]
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]
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}
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""", """
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{
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"type": "LineString",
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"coordinates": [
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[90.0, 91.0, 45.0],
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[101.0, 1.0, 45.0]
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]
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}
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""", """
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{
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"type": "LineString",
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"coordinates": [
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[90.0, 45.0, 45.0]
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]
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}
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""", """
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{
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"type": "LineString",
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"coordinates": [
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[190.0, 90.0, 45.0],
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[101.0, 1.0, 45.0]
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]
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}
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""", """
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{
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"type": "LineString",
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"coordinates": [
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[90.0, 90.0, 45.0],
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[101.0, -91.0, 45.0]
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]
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}
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"""
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})
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void deserialization_withInvalidContent(String json) {
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assertThrows(Exception.class, () -> jacksonTester.parseObject(json));
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}
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@Test
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void serialisation_withCoordinates_shouldThrowError() {
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assertThrows(Exception.class, () -> new LineString(List.of()));
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}
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@Test
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void serialisation_withOneCoordinates_shouldThrowError() {
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assertThrows(Exception.class, () -> new LineString(List.of(Position.of(180, 90))));
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}
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@Test
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void serialisation_withValidCoordinates_shouldBeSuccess() throws IOException {
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LineString lineString = new LineString(List.of(Position.of(180, 90), Position.of(-180, -90)));
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JsonContent<LineString> jsonContent = jacksonTester.write(lineString);
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assertThat(jsonContent).isEqualToJson("""
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{
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"type": "LineString",
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"coordinates": [
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[180.0, 90.0],
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[-180.0, -90.0]
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]
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}
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""");
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}
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@Test
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void serialisation_withValidCoordinates_andAltitude_shouldBeSuccess() throws IOException {
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LineString lineString = new LineString(List.of(Position.of(180, 90, 45), Position.of(-180, -90, 45)));
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JsonContent<LineString> jsonContent = jacksonTester.write(lineString);
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assertThat(jsonContent).isEqualToJson("""
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{
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"type": "LineString",
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"coordinates": [
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[180.0, 90.0, 45.0],
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[-180.0, -90.0, 45.0]
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]
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}
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""");
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}
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}

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