How to use

toJsonTree

method

in

com.google.gson.Gson

public JsonElement toJSON() {
  return GSON.toJsonTree(this);
}

public JsonElement toJSON() {
  return GSON.toJsonTree(this);
}

public JsonElement toJSON() {
  return GSON.toJsonTree(this);
}

  @Override
  public JsonElement getValueAsJson() {
    return GSON.toJsonTree(value);
  }
}

public JsonReader jsonReaderFrom(Map map) {
  try {
    return new JsonReader(GSON.toJsonTree(map).getAsJsonObject());
  } catch (Exception e) {
    throw new JsonParseException(e);
  }
}

@Test
public void shouldAppendTypeFieldWhenSerializingMaterials()
{
  CRMaterial value = customSvn;
  JsonObject jsonObject = (JsonObject)gson.toJsonTree(value);
  assertThat(jsonObject.get("type").getAsString(), is(CRSvnMaterial.TYPE_NAME));
}
@Test

@Test
public void shouldAppendTypeFieldWhenSerializingMaterials()
{
  CRMaterial value = named;
  JsonObject jsonObject = (JsonObject)gson.toJsonTree(value);
  assertThat(jsonObject.get("type").getAsString(), is(CRConfigMaterial.TYPE_NAME));
}

@Test
public void shouldAppendTypeFieldWhenSerializingMaterials()
{
  CRMaterial value = customHg;
  JsonObject jsonObject = (JsonObject)gson.toJsonTree(value);
  assertThat(jsonObject.get("type").getAsString(), is(CRHgMaterial.TYPE_NAME));
}
@Test

@Test
public void shouldAppendTypeFieldWhenSerializingMaterials()
{
  CRMaterial value = dependsOnPipeline;
  JsonObject jsonObject = (JsonObject)gson.toJsonTree(value);
  assertThat(jsonObject.get("type").getAsString(), is(CRDependencyMaterial.TYPE_NAME));
}

@Test
public void shouldAppendTypeFieldWhenSerializingNantTask()
{
  CRTask value = nantWithPath;
  JsonObject jsonObject = (JsonObject)gson.toJsonTree(value);
  assertThat(jsonObject.get("type").getAsString(), is("nant"));
}

@Test
public void shouldAppendTypeFieldWhenSerializingMaterials()
{
  CRMaterial value = pluggableGit;
  JsonObject jsonObject = (JsonObject)gson.toJsonTree(value);
  assertThat(jsonObject.get("type").getAsString(), is(CRPluggableScmMaterial.TYPE_NAME));
}
@Test

@Test
public void shouldAppendTypeFieldWhenSerializingMaterials()
{
  CRMaterial value = veryCustomGit;
  JsonObject jsonObject = (JsonObject)gson.toJsonTree(value);
  assertThat(jsonObject.get("type").getAsString(), is(CRGitMaterial.TYPE_NAME));
}
@Test

@Test
public void shouldAppendTypeFieldWhenSerializingMaterials()
{
  CRMaterial value = p4custom;
  JsonObject jsonObject = (JsonObject)gson.toJsonTree(value);
  assertThat(jsonObject.get("type").getAsString(), is(CRP4Material.TYPE_NAME));
}
@Test

@Test
public void shouldAppendTypeFieldWhenSerializingTask()
{
  CRTask value = curl;
  JsonObject jsonObject = (JsonObject)gson.toJsonTree(value);
  assertThat(jsonObject.get("type").getAsString(), is(CRPluggableTask.TYPE_NAME));
}

@Test
public void shouldAppendTypeFieldWhenSerializingMaterials()
{
  CRMaterial value = customTfs;
  JsonObject jsonObject = (JsonObject)gson.toJsonTree(value);
  assertThat(jsonObject.get("type").getAsString(), is(CRTfsMaterial.TYPE_NAME));
}
@Test

@Test
public void shouldAppendTypeFieldWhenSerializingRakeTask()
{
  CRTask value = rakeTask;
  JsonObject jsonObject = (JsonObject)gson.toJsonTree(value);
  assertThat(jsonObject.get("type").getAsString(), is("rake"));
}

@Test
public void shouldAppendTypeFieldWhenSerializingTasks()
{
  CRTask value = simpleExecWithArgs;
  JsonObject jsonObject = (JsonObject)gson.toJsonTree(value);
  assertThat(jsonObject.get("type").getAsString(), is(CRExecTask.TYPE_NAME));
}
@Test

@Test
public void shouldAppendTypeFieldWhenSerializingMaterials()
{
  CRMaterial value = packageMaterial;
  JsonObject jsonObject = (JsonObject)gson.toJsonTree(value);
  assertThat(jsonObject.get("type").getAsString(), is(CRPackageMaterial.TYPE_NAME));
}
@Test

@Test
public void shouldAppendTypeFieldWhenSerializingAntTask()
{
  CRTask value = antTask;
  JsonObject jsonObject = (JsonObject)gson.toJsonTree(value);
  assertThat(jsonObject.get("type").getAsString(), is("ant"));
}
@Test

@Test
public void shouldIgnoreWhenJsonHasUnknownElements()
{
  Map<String,T> examples = getExamples();
  for(Map.Entry<String,T> example : examples.entrySet()) {
    T value = example.getValue();
    JsonObject jsonObject = (JsonObject)gson.toJsonTree(value);
    jsonObject.add("extraProperty", new JsonPrimitive("This is not part of message type"));
    String json = gson.toJson(jsonObject);
    T deserializedValue = (T)gson.fromJson(json,value.getClass());
    assertThat(String.format("Example %s - Deserialized value should equal to value before serialization", example.getKey()),
        deserializedValue, is(value));
  }
}