Add step maneuver modifier constants (#1142)

Co-authored-by: Kyle Madsen <>

Author: kmadsen

services-directions-models/src/main/java/com/mapbox/api/directions/v5/models/BannerText.java

@@ -71,6 +71,7 @@ public static Builder builder() {
    * @since 3.0.0
    */
   @Nullable
+  @ManeuverModifier.Type
   public abstract String modifier();
 
 

services-directions-models/src/main/java/com/mapbox/api/directions/v5/models/BannerView.java

@@ -70,6 +70,7 @@ public static Builder builder() {
    * @since 5.0.0
    */
   @Nullable
+  @ManeuverModifier.Type
   public abstract String modifier();
 
   /**

services-directions-models/src/main/java/com/mapbox/api/directions/v5/models/ManeuverModifier.java

@@ -0,0 +1,89 @@
+package com.mapbox.api.directions.v5.models;
+
+import androidx.annotation.StringDef;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+/**
+ * Constants for the {@link StepManeuver#modifier()}.
+ *
+ * @since 5.2.0
+ */
+public final class ManeuverModifier {
+
+  /**
+   * Indicates "uturn" maneuver modifier.
+   *
+   * @since 5.2.0
+   */
+  public static final String UTURN = "uturn";
+
+  /**
+   * Indicates "sharp right" maneuver modifier.
+   *
+   * @since 5.2.0
+   */
+  public static final String SHARP_RIGHT = "sharp right";
+
+  /**
+   * Indicates "right" maneuver modifier.
+   *
+   * @since 5.2.0
+   */
+  public static final String RIGHT = "right";
+
+  /**
+   * Indicates "slight right" maneuver modifier.
+   *
+   * @since 5.2.0
+   */
+  public static final String SLIGHT_RIGHT = "slight right";
+
+  /**
+   * Indicates "straight" maneuver modifier.
+   *
+   * @since 5.2.0
+   */
+  public static final String STRAIGHT = "straight";
+
+  /**
+   * Indicates "slight left" maneuver modifier.
+   *
+   * @since 5.2.0
+   */
+  public static final String SLIGHT_LEFT = "slight left";
+
+  /**
+   * Indicates "left" maneuver modifier.
+   *
+   * @since 5.2.0
+   */
+  public static final String LEFT = "left";
+
+  /**
+   * Indicates "sharp left" maneuver modifier.
+   *
+   * @since 5.2.0
+   */
+  public static final String SHARP_LEFT = "sharp left";
+
+  /**
+   * Representation of ManeuverModifier in form of logical types.
+   *
+   * @since 5.2.0
+   */
+  @Retention(RetentionPolicy.SOURCE)
+  @StringDef({
+          ManeuverModifier.UTURN,
+          ManeuverModifier.SHARP_RIGHT,
+          ManeuverModifier.RIGHT,
+          ManeuverModifier.SLIGHT_RIGHT,
+          ManeuverModifier.STRAIGHT,
+          ManeuverModifier.SLIGHT_LEFT,
+          ManeuverModifier.LEFT,
+          ManeuverModifier.SHARP_LEFT
+  })
+  @interface Type {
+  }
+}

services-directions-models/src/main/java/com/mapbox/api/directions/v5/models/StepManeuver.java

@@ -393,7 +393,7 @@ public abstract Builder bearingAfter(
      * @return this builder for chaining options together
      * @since 3.0.0
      */
-    public abstract Builder modifier(@Nullable String modifier);
+    public abstract Builder modifier(@Nullable @ManeuverModifier.Type String modifier);
 
     /**
      * An optional integer indicating number of the exit to take. If exit is undefined the

services-directions-models/src/test/java/com/mapbox/api/directions/v5/models/StepManeuverTest.java

@@ -38,7 +38,7 @@ public void testToFromJson2() {
     StepManeuver stepManeuver = StepManeuver.builder()
       .rawLocation(new double[]{13.424671, 52.508812})
       .type("turn")
-      .modifier("left")
+      .modifier(ManeuverModifier.LEFT)
       .bearingBefore(299.0)
       .bearingAfter(202.0)
       .instruction("Turn left onto Adalbertstraße")