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[feat] #7 geojson data modeling added for LineString
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Ramachandran Nellaiyappan committed Mar 18, 2024
1 parent 78cb173 commit 04aa3cf
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39 changes: 39 additions & 0 deletions src/main/java/com/github/nramc/dev/journey/api/geojson/LineString.java
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package com.github.nramc.dev.journey.api.geojson;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.github.nramc.dev.journey.api.geojson.types.GeoJsonType;
import com.github.nramc.dev.journey.api.geojson.types.Position;
import lombok.EqualsAndHashCode;
import lombok.Getter;
import lombok.ToString;

import java.util.Collections;
import java.util.List;

@Getter
@ToString
@EqualsAndHashCode(callSuper = false)
public final class LineString extends Geometry {
private final List<Position> coordinates;

public LineString(List<Position> coordinates) {
super(GeoJsonType.LINE_STRING);
if (coordinates.size() < 2) {
throw new IllegalArgumentException("Invalid coordinates. Minimum 2 positions required");
}
this.coordinates = Collections.unmodifiableList(coordinates);
}

@JsonCreator
public static LineString of(GeoJsonType type, List<Position> coordinates) {
if (type != GeoJsonType.LINE_STRING) {
throw new IllegalArgumentException(String.format("Invalid type. expected[%s] got:[%s]",
GeoJsonType.LINE_STRING.getType(), type.getType()));
}
return new LineString(coordinates);
}

public static LineString of(List<Position> coordinates) {
return of(GeoJsonType.LINE_STRING, coordinates);
}
}
197 changes: 197 additions & 0 deletions src/test/java/com/github/nramc/dev/journey/api/geojson/LineStringTest.java
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package com.github.nramc.dev.journey.api.geojson;

import com.github.nramc.dev.journey.api.geojson.types.GeoJsonType;
import com.github.nramc.dev.journey.api.geojson.types.Position;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.autoconfigure.json.JsonTest;
import org.springframework.boot.test.json.JacksonTester;
import org.springframework.boot.test.json.JsonContent;

import java.io.IOException;
import java.util.List;

import static org.assertj.core.api.Assertions.assertThat;
import static org.junit.jupiter.api.Assertions.assertThrows;

@JsonTest
class LineStringTest {
@Autowired
JacksonTester<LineString> jacksonTester;

@Test
void deserialization_withLongitudeAndLatitude() throws IOException {
String json = """
{
"type": "LineString",
"coordinates": [
[100.0, 0.0],
[101.0, 1.0]
]
}
""";
LineString object = jacksonTester.parseObject(json);
assertThat(object).isNotNull()
.satisfies(obj -> assertThat(obj.getType()).isEqualTo(GeoJsonType.LINE_STRING.getType()))
.extracting(LineString::getCoordinates).asList().isNotEmpty()
.hasSize(2)
.containsExactly(Position.of(100.0, 0.0), Position.of(101.0, 1.0));
}

@Test
void deserialization_withLongitudeAndLatitudeAndAltitude() throws IOException {
String json = """
{
"type": "LineString",
"coordinates": [
[100.0, 0.0, 45.0],
[101.0, 1.0, 45.0]
]
}
""";
LineString object = jacksonTester.parseObject(json);
assertThat(object).isNotNull()
.satisfies(obj -> assertThat(obj.getType()).isEqualTo(GeoJsonType.LINE_STRING.getType()))
.extracting(LineString::getCoordinates).asList().isNotEmpty()
.hasSize(2)
.containsExactly(Position.of(100.0, 0.0, 45.0), Position.of(101.0, 1.0, 45.0));
}

@Test
void deserialization_withLongitudeAndLatitudeAndAltitude_andWithManyCoordinates() throws IOException {
String json = """
{
"type": "LineString",
"coordinates": [
[100.0, 51.0, 45.0],
[101.0, 52.0, 45.0],
[102.0, 53.0, 45.0],
[103.0, 54.0, 45.0],
[104.0, 55.0, 45.0],
[105.0, 56.0, 45.0],
[106.0, 57.0, 45.0],
[107.0, 58.0, 45.0],
[108.0, 59.0, 45.0],
[109.0, 60.0, 45.0],
[110.0, 61.0, 45.0]
]
}
""";
LineString object = jacksonTester.parseObject(json);
assertThat(object).isNotNull()
.satisfies(obj -> assertThat(obj.getType()).isEqualTo(GeoJsonType.LINE_STRING.getType()))
.extracting(LineString::getCoordinates).asList().isNotEmpty()
.hasSize(11)
.containsExactly(
Position.of(100.0, 51.0, 45.0),
Position.of(101.0, 52.0, 45.0),
Position.of(102.0, 53.0, 45.0),
Position.of(103.0, 54.0, 45.0),
Position.of(104.0, 55.0, 45.0),
Position.of(105.0, 56.0, 45.0),
Position.of(106.0, 57.0, 45.0),
Position.of(107.0, 58.0, 45.0),
Position.of(108.0, 59.0, 45.0),
Position.of(109.0, 60.0, 45.0),
Position.of(110.0, 61.0, 45.0)
);
}

@ParameterizedTest
@ValueSource(strings = {
"""
{
"type": "invalidType",
"coordinates": [
[100.0, 0.0, 45.0],
[101.0, 1.0, 45.0]
]
}
""", """
{
"type": "LineString",
"coordinates": [
[190.0, 0.0, 45.0],
[101.0, 1.0, 45.0]
]
}
""", """
{
"type": "LineString",
"coordinates": [
[90.0, 91.0, 45.0],
[101.0, 1.0, 45.0]
]
}
""", """
{
"type": "LineString",
"coordinates": [
[90.0, 45.0, 45.0]
]
}
""", """
{
"type": "LineString",
"coordinates": [
[190.0, 90.0, 45.0],
[101.0, 1.0, 45.0]
]
}
""", """
{
"type": "LineString",
"coordinates": [
[90.0, 90.0, 45.0],
[101.0, -91.0, 45.0]
]
}
"""
})
void deserialization_withInvalidContent(String json) {
assertThrows(Exception.class, () -> jacksonTester.parseObject(json));
}

@Test
void serialisation_withCoordinates_shouldThrowError() {
assertThrows(Exception.class, () -> new LineString(List.of()));
}

@Test
void serialisation_withOneCoordinates_shouldThrowError() {
assertThrows(Exception.class, () -> new LineString(List.of(Position.of(180, 90))));
}

@Test
void serialisation_withValidCoordinates_shouldBeSuccess() throws IOException {
LineString lineString = new LineString(List.of(Position.of(180, 90), Position.of(-180, -90)));
JsonContent<LineString> jsonContent = jacksonTester.write(lineString);
assertThat(jsonContent).isEqualToJson("""
{
"type": "LineString",
"coordinates": [
[180.0, 90.0],
[-180.0, -90.0]
]
}
""");
}

@Test
void serialisation_withValidCoordinates_andAltitude_shouldBeSuccess() throws IOException {
LineString lineString = new LineString(List.of(Position.of(180, 90, 45), Position.of(-180, -90, 45)));
JsonContent<LineString> jsonContent = jacksonTester.write(lineString);
assertThat(jsonContent).isEqualToJson("""
{
"type": "LineString",
"coordinates": [
[180.0, 90.0, 45.0],
[-180.0, -90.0, 45.0]
]
}
""");
}

}

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