Add entity Airport

core/src/main/java/cz/muni/fi/pa165/core/data/domain/Airport.java

+package cz.muni.fi.pa165.core.data.domain;
+
+import cz.muni.fi.pa165.core.data.domain.common.DomainEntity;
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.FetchType;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.Table;
+import jakarta.persistence.Transient;
+import jakarta.validation.constraints.Size;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import lombok.NonNull;
+
+import java.util.Objects;
+
+@Entity
+@Table(name = "airports")
+@Data
+@NoArgsConstructor
+public class Airport extends DomainEntity {
+
+    @Column(nullable = false, unique = true)
+    private @NonNull String name;
+
+    @Column(nullable = false, unique = true)
+    @Size(min = 3, max = 3)
+    private @NonNull String code;
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "city_id")
+    private City city;
+
+    private @Transient GpsLocation gpsLocation;
+
+    // TODO: arrivingFlights --  Flight - Airport relationship, add to toString()
+
+    // TODO: departingFlights -- Flight - Airport relationship, add to toString()
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (!(o instanceof Airport airport)) {
+            return false;
+        }
+        return getName().equals(airport.getName())
+                && getCode().equals(airport.getCode());
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(getName(), getCode());
+    }
+
+    @Override
+    public String toString() {
+        return "Airport{" +
+                "name='" + name + '\'' +
+                ", code='" + code + '\'' +
+                ", city=" + city.getName() +
+                ", gpsLocation=" + gpsLocation +
+                '}';
+    }
+}