Support for @JsonTypeInfo(use=Id.CLASS) (refs #189)

Author: vojtechhabarta

typescript-generator-core/src/main/java/cz/habarta/typescript/generator/parser/Jackson2Parser.java

@@ -121,7 +121,7 @@ private BeanModel parseBean(SourceType<Class<?>> sourceClass) {
         } else if (isSupported(parentJsonTypeInfo = getAnnotationRecursive(sourceClass.type, JsonTypeInfo.class))) {
             // this is child class
             discriminantProperty = getDiscriminantPropertyName(parentJsonTypeInfo);
-            discriminantLiteral = getTypeName(sourceClass.type);
+            discriminantLiteral = getTypeName(parentJsonTypeInfo, sourceClass.type);
         } else {
             // not part of explicit hierarchy
             discriminantProperty = null;
@@ -172,7 +172,11 @@ private String getDiscriminantPropertyName(JsonTypeInfo jsonTypeInfo) {
                 : jsonTypeInfo.property();
     }
 
-    private String getTypeName(final Class<?> cls) {
+    private String getTypeName(JsonTypeInfo parentJsonTypeInfo, final Class<?> cls) {
+        // Id.CLASS
+        if (parentJsonTypeInfo.use() == JsonTypeInfo.Id.CLASS) {
+            return cls.getName();
+        }
         // find @JsonTypeName recursively
         final JsonTypeName jsonTypeName = getAnnotationRecursive(cls, JsonTypeName.class);
         if (jsonTypeName != null && !jsonTypeName.value().isEmpty()) {

typescript-generator-core/src/test/java/cz/habarta/typescript/generator/TaggedUnionsTest.java

@@ -4,6 +4,7 @@
 import com.fasterxml.jackson.annotation.JsonSubTypes;
 import com.fasterxml.jackson.annotation.JsonTypeInfo;
 import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.databind.ObjectMapper;
 import java.util.List;
 import org.junit.Assert;
 import org.junit.Test;
@@ -120,6 +121,23 @@ private static interface DiamondC extends DiamondB1, DiamondB2 {
         public String getC();
     }
 
+    @JsonTypeInfo(use=JsonTypeInfo.Id.CLASS, include=JsonTypeInfo.As.PROPERTY, property="@class")
+    @JsonSubTypes({
+        @JsonSubTypes.Type(DieselCar.class),
+        @JsonSubTypes.Type(ElectricCar.class),
+    })
+    private static class Car {
+        public String name;
+    }
+
+    private static class DieselCar extends Car {
+        public double fuelTankCapacityInLiters;
+    }
+
+    private static class ElectricCar extends Car {
+        public double batteryCapacityInKWh;
+    }
+
     @Test
     public void testTaggedUnions() {
         final Settings settings = TestUtils.settings();
@@ -295,4 +313,39 @@ public void testTaggedUnionsWithDiamond() {
         Assert.assertEquals(expected, output);
     }
 
+    @Test
+    public void testIdClass() {
+        final Settings settings = TestUtils.settings();
+        final String output = new TypeScriptGenerator(settings).generateTypeScript(Input.from(Car.class));
+        System.out.println(output);
+        final String expected = (
+                "\n" +
+                "interface Car {\n" +
+                "    '@class': 'cz.habarta.typescript.generator.TaggedUnionsTest$DieselCar' | 'cz.habarta.typescript.generator.TaggedUnionsTest$ElectricCar';\n" +
+                "    name: string;\n" +
+                "}\n" +
+                "\n" +
+                "interface DieselCar extends Car {\n" +
+                "    '@class': 'cz.habarta.typescript.generator.TaggedUnionsTest$DieselCar';\n" +
+                "    fuelTankCapacityInLiters: number;\n" +
+                "}\n" +
+                "\n" +
+                "interface ElectricCar extends Car {\n" +
+                "    '@class': 'cz.habarta.typescript.generator.TaggedUnionsTest$ElectricCar';\n" +
+                "    batteryCapacityInKWh: number;\n" +
+                "}\n" +
+                "\n" +
+                "type CarUnion = DieselCar | ElectricCar;\n" +
+                ""
+                ).replace('\'', '"');
+        Assert.assertEquals(expected, output);
+    }
+
+    public static void main(String[] args) throws Exception {
+        final ElectricCar electricCar = new ElectricCar();
+        electricCar.name = "Tesla";
+        electricCar.batteryCapacityInKWh = 75;  // kWh
+        System.out.println(new ObjectMapper().writeValueAsString(electricCar));
+    }
+
 }