com.google.gson.internal.Streams Java Examples

public static Event parseEvent(byte[] event) {
  //parse the event payload and remove the type attribute
  JsonReader jsonReader =  new JsonReader(new InputStreamReader(new ByteArrayInputStream(event)));
  JsonElement jsonElement = Streams.parse(jsonReader);
  JsonElement labelJsonElement = jsonElement.getAsJsonObject().remove(TYPE_FIELD);

  if (labelJsonElement == null) {
    throw new IllegalArgumentException("Event does not define a type field: " + new String(event));
  }

  //convert json to POJO, based on the type attribute
  switch (labelJsonElement.getAsString()) {
    case "watermark":
      return gson.fromJson(jsonElement, WatermarkEvent.class);
    case "trip":
      return gson.fromJson(jsonElement, TripEvent.class);
    default:
      throw new IllegalArgumentException("Found unsupported event type: " + labelJsonElement.getAsString());
  }
}
 

public void toJson(JsonElement jsonElement, JsonWriter writer) throws JsonIOException {
    boolean oldLenient = writer.isLenient();
    writer.setLenient(true);
    boolean oldHtmlSafe = writer.isHtmlSafe();
    writer.setHtmlSafe(this.htmlSafe);
    boolean oldSerializeNulls = writer.getSerializeNulls();
    writer.setSerializeNulls(this.serializeNulls);
    try {
        Streams.write(jsonElement, writer);
        writer.setLenient(oldLenient);
        writer.setHtmlSafe(oldHtmlSafe);
        writer.setSerializeNulls(oldSerializeNulls);
    } catch (Throwable e) {
        throw new JsonIOException(e);
    } catch (Throwable th) {
        writer.setLenient(oldLenient);
        writer.setHtmlSafe(oldHtmlSafe);
        writer.setSerializeNulls(oldSerializeNulls);
    }
}
 

public static Event parseEvent(byte[] event) {
  //parse the event payload and remove the type attribute
  JsonReader jsonReader =  new JsonReader(new InputStreamReader(new ByteArrayInputStream(event)));
  JsonElement jsonElement = Streams.parse(jsonReader);
  JsonElement labelJsonElement = jsonElement.getAsJsonObject().remove(TYPE_FIELD);

  if (labelJsonElement == null) {
    throw new IllegalArgumentException("Event does not define a type field: " + new String(event));
  }

  //convert json to POJO, based on the type attribute
  switch (labelJsonElement.getAsString()) {
    case "watermark":
      return gson.fromJson(jsonElement, WatermarkEvent.class);
    case "trip":
      return gson.fromJson(jsonElement, TripEvent.class);
    default:
      throw new IllegalArgumentException("Found unsupported event type: " + labelJsonElement.getAsString());
  }
}
 

public String toString()
{
    String s;
    try
    {
        StringWriter stringwriter = new StringWriter();
        JsonWriter jsonwriter = new JsonWriter(stringwriter);
        jsonwriter.setLenient(true);
        Streams.write(this, jsonwriter);
        s = stringwriter.toString();
    }
    catch (IOException ioexception)
    {
        throw new AssertionError(ioexception);
    }
    return s;
}
 

public void write(JsonWriter jsonwriter, Object obj)
{
    if (a == null)
    {
        a().write(jsonwriter, obj);
        return;
    }
    if (obj == null)
    {
        jsonwriter.nullValue();
        return;
    } else
    {
        Streams.write(a.serialize(obj, d.getType(), c.c), jsonwriter);
        return;
    }
}
 

public void testReadWriteTwoObjects() throws Exception {
  Gson gson = new Gson();
  CharArrayWriter writer = new CharArrayWriter();
  BagOfPrimitives expectedOne = new BagOfPrimitives(1, 1, true, "one");
  writer.write(gson.toJson(expectedOne).toCharArray());
  BagOfPrimitives expectedTwo = new BagOfPrimitives(2, 2, false, "two");
  writer.write(gson.toJson(expectedTwo).toCharArray());
  CharArrayReader reader = new CharArrayReader(writer.toCharArray());

  JsonReader parser = new JsonReader(reader);
  parser.setLenient(true);
  JsonElement element1 = Streams.parse(parser);
  JsonElement element2 = Streams.parse(parser);
  BagOfPrimitives actualOne = gson.fromJson(element1, BagOfPrimitives.class);
  assertEquals("one", actualOne.stringValue);
  BagOfPrimitives actualTwo = gson.fromJson(element2, BagOfPrimitives.class);
  assertEquals("two", actualTwo.stringValue);
}
 

@Override
public R read(JsonReader in) throws IOException {
  JsonElement element = Streams.parse(in);
  if (element.isJsonNull()) {
    return readNull();
  }
  JsonObject jsonObject = element.getAsJsonObject();

  if (this.typeToken.getRawType() == Optional.class) {
    if (jsonObject.has(OBJECT_TYPE)) {
      return (R) Optional.of(readValue(jsonObject, null));
    } else if (jsonObject.entrySet().isEmpty()) {
      return (R) Optional.absent();
    } else {
      throw new IOException("No class found for Optional value.");
    }
  }
  return this.readValue(jsonObject, this.typeToken);
}
 

/**
 * Writes the JSON for {@code jsonElement} to {@code writer}.
 * @throws JsonIOException if there was a problem writing to the writer
 */
public void toJson(JsonElement jsonElement, JsonWriter writer) throws JsonIOException {
  boolean oldLenient = writer.isLenient();
  writer.setLenient(true);
  boolean oldHtmlSafe = writer.isHtmlSafe();
  writer.setHtmlSafe(htmlSafe);
  boolean oldSerializeNulls = writer.getSerializeNulls();
  writer.setSerializeNulls(serializeNulls);
  try {
    Streams.write(jsonElement, writer);
  } catch (IOException e) {
    throw new JsonIOException(e);
  } finally {
    writer.setLenient(oldLenient);
    writer.setHtmlSafe(oldHtmlSafe);
    writer.setSerializeNulls(oldSerializeNulls);
  }
}
 

public String getJsapiTicket(boolean forceRefresh) throws WxErrorException {
  if (forceRefresh) {
    wxCpConfigStorage.expireJsapiTicket();
  }
  if (wxCpConfigStorage.isJsapiTicketExpired()) {
    synchronized (globalJsapiTicketRefreshLock) {
      if (wxCpConfigStorage.isJsapiTicketExpired()) {
        String url = "https://qyapi.weixin.qq.com/cgi-bin/get_jsapi_ticket";
        String responseContent = execute(new SimpleGetRequestExecutor(), url, null);
        JsonElement tmpJsonElement = Streams.parse(new JsonReader(new StringReader(responseContent)));
        JsonObject tmpJsonObject = tmpJsonElement.getAsJsonObject();
        String jsapiTicket = tmpJsonObject.get("ticket").getAsString();
        int expiresInSeconds = tmpJsonObject.get("expires_in").getAsInt();
        wxCpConfigStorage.updateJsapiTicket(jsapiTicket, expiresInSeconds);
      }
    }
  }
  return wxCpConfigStorage.getJsapiTicket();
}
 

@Override
public List<WxCpUser> userList(Integer departId, Boolean fetchChild, Integer status) throws WxErrorException {
  String url = "https://qyapi.weixin.qq.com/cgi-bin/user/list?department_id=" + departId;
  String params = "";
  if (fetchChild != null) {
    params += "&fetch_child=" + (fetchChild ? "1" : "0");
  }
  if (status != null) {
    params += "&status=" + status;
  } else {
    params += "&status=0";
  }

  String responseContent = get(url, params);
  JsonElement tmpJsonElement = Streams.parse(new JsonReader(new StringReader(responseContent)));
  return WxCpGsonBuilder.INSTANCE.create()
      .fromJson(
          tmpJsonElement.getAsJsonObject().get("userlist"),
          new TypeToken<List<WxCpUser>>() { }.getType()
      );
}
 

@Override
public List<WxCpUser> departGetUsers(Integer departId, Boolean fetchChild, Integer status) throws WxErrorException {
  String url = "https://qyapi.weixin.qq.com/cgi-bin/user/simplelist?department_id=" + departId;
  String params = "";
  if (fetchChild != null) {
    params += "&fetch_child=" + (fetchChild ? "1" : "0");
  }
  if (status != null) {
    params += "&status=" + status;
  } else {
    params += "&status=0";
  }

  String responseContent = get(url, params);
  JsonElement tmpJsonElement = Streams.parse(new JsonReader(new StringReader(responseContent)));
  return WxCpGsonBuilder.INSTANCE.create()
      .fromJson(
          tmpJsonElement.getAsJsonObject().get("userlist"),
          new TypeToken<List<WxCpUser>>() { }.getType()
      );
}
 

public String getJsapiTicket(boolean forceRefresh) throws WxErrorException {
  if (forceRefresh) {
    wxMpConfigStorage.expireJsapiTicket();
  }
  if (wxMpConfigStorage.isJsapiTicketExpired()) {
    synchronized (globalJsapiTicketRefreshLock) {
      if (wxMpConfigStorage.isJsapiTicketExpired()) {
        String url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi";
        String responseContent = execute(new SimpleGetRequestExecutor(), url, null);
        JsonElement tmpJsonElement = Streams.parse(new JsonReader(new StringReader(responseContent)));
        JsonObject tmpJsonObject = tmpJsonElement.getAsJsonObject();
        String jsapiTicket = tmpJsonObject.get("ticket").getAsString();
        int expiresInSeconds = tmpJsonObject.get("expires_in").getAsInt();
        wxMpConfigStorage.updateJsapiTicket(jsapiTicket, expiresInSeconds);
      }
    }
  }
  return wxMpConfigStorage.getJsapiTicket();
}
 

public static String json2str(JsonElement json, Boolean pretty) {
   try {
       StringWriter stringWriter = new StringWriter(1024);
        JsonWriter jsonWriter = new JsonWriter(stringWriter);
        if ( pretty!=null && pretty ) {
            jsonWriter.setIndent("  ");
        }
        jsonWriter.setLenient(true);
        Streams.write(json, jsonWriter);
        return stringWriter.toString();
   }catch(Throwable t) {
       return json.toString();
   }
}
 

public void toJson(Object src, Type typeOfSrc, Appendable writer) throws JsonIOException {
    try {
        toJson(src, typeOfSrc, newJsonWriter(Streams.writerForAppendable(writer)));
    } catch (Throwable e) {
        throw new JsonIOException(e);
    }
}
 

public void toJson(JsonElement jsonElement, Appendable writer) throws JsonIOException {
    try {
        toJson(jsonElement, newJsonWriter(Streams.writerForAppendable(writer)));
    } catch (IOException e) {
        throw new RuntimeException(e);
    }
}
 

public T read(JsonReader in) throws IOException {
    if (this.deserializer == null) {
        return delegate().read(in);
    }
    JsonElement value = Streams.parse(in);
    if (value.isJsonNull()) {
        return null;
    }
    return this.deserializer.deserialize(value, this.typeToken.getType(), this.gson.deserializationContext);
}
 

public void write(JsonWriter out, T value) throws IOException {
    if (this.serializer == null) {
        delegate().write(out, value);
    } else if (value == null) {
        out.nullValue();
    } else {
        Streams.write(this.serializer.serialize(value, this.typeToken.getType(), this.gson.serializationContext), out);
    }
}
 

public String toString() {
    try {
        StringWriter stringWriter = new StringWriter();
        JsonWriter jsonWriter = new JsonWriter(stringWriter);
        jsonWriter.setLenient(true);
        Streams.write(this, jsonWriter);
        return stringWriter.toString();
    } catch (IOException e) {
        throw new AssertionError(e);
    }
}
 

@Override
public <R> TypeAdapter<R> create(Gson gson, TypeToken<R> type) {
  if (type.getRawType() != baseType) {
    return null;
  }

  return new TypeAdapter<R>() {
    @Override public R read(JsonReader in) throws IOException {
      JsonElement jsonElement = Streams.parse(in);
      JsonElement labelJsonElement = jsonElement.getAsJsonObject().remove(typeFieldName);
      if (labelJsonElement == null) {
        throw new JsonParseException("cannot deserialize " + baseType
            + " because it does not define a field named " + typeFieldName);
      }
      String label = labelJsonElement.getAsString();
      
      try {
        String subclassName = baseType.getName() + "$" + label.replaceAll("\\s", "");
        Class<?> subclass = Class.forName(subclassName);
        @SuppressWarnings("unchecked")
        TypeAdapter<R> delegate = (TypeAdapter<R>) gson.getDelegateAdapter(
            InnerClassTypeAdapterFactory.this, TypeToken.get(subclass));
        if (delegate == null) {
          throw new JsonParseException("cannot deserialize " + baseType + " subtype named "
              + label);
        }
        return delegate.fromJsonTree(jsonElement);
      } catch (ClassNotFoundException e) {
        throw new JsonParseException("cannot deserialize " + baseType + " subtype named "
            + label);
      }
    }

    @Override public void write(JsonWriter out, R value) throws IOException {
      throw new NotImplementedException("Write not implemented for InnerClassTypeAdapter");
    }
  }.nullSafe();
}
 

public static void writeJsonToFile(JsonObject object, File file) {
	try (JsonWriter writer = new JsonWriter(Files.newWriter(file, Charset.defaultCharset()))) {
		Streams.write(object, writer);
	} catch (IOException e) {
		Wizardry.LOGGER.error("    > SOMETHING WENT WRONG! Could not create or write to file! Customizations to recipes and modules will be reset every time you load the game!");
		e.printStackTrace();
	}
}
 

@Override
public void setNonNullParameter(PreparedStatement ps, int i, JsonElement parameter, JdbcType jdbcType) throws SQLException {
    try {
        StringWriter sw = new StringWriter();
        JsonWriter jsonWriter = new JsonWriter(sw);
        jsonWriter.setLenient(false);
        Streams.write(parameter, jsonWriter);
        ps.setString(i, sw.toString());
    } catch (IOException ex) {
        throw new RuntimeException(ex.getMessage(), ex);
    }
}
 

public void toJson(JsonElement jsonelement, Appendable appendable)
{
    try
    {
        toJson(jsonelement, a(Streams.writerForAppendable(appendable)));
        return;
    }
    catch (IOException ioexception)
    {
        throw new RuntimeException(ioexception);
    }
}
 

public void toJson(Object obj, Type type, Appendable appendable)
{
    try
    {
        toJson(obj, type, a(Streams.writerForAppendable(appendable)));
        return;
    }
    catch (IOException ioexception)
    {
        throw new JsonIOException(ioexception);
    }
}
 

public Object read(JsonReader jsonreader)
{
    if (b == null)
    {
        return a().read(jsonreader);
    }
    JsonElement jsonelement = Streams.parse(jsonreader);
    if (jsonelement.isJsonNull())
    {
        return null;
    } else
    {
        return b.deserialize(jsonelement, d.getType(), c.b);
    }
}
 

/**
 * Writes out the equivalent JSON for a tree of {@link JsonElement}s.
 *
 * @param jsonElement root of a tree of {@link JsonElement}s
 * @param writer Writer to which the Json representation needs to be written
 * @throws JsonIOException if there was a problem writing to the writer
 * @since 1.4
 */
public void toJson(JsonElement jsonElement, Appendable writer) throws JsonIOException {
  try {
    JsonWriter jsonWriter = newJsonWriter(Streams.writerForAppendable(writer));
    toJson(jsonElement, jsonWriter);
  } catch (IOException e) {
    throw new JsonIOException(e);
  }
}
 

@Override public T read(JsonReader in) throws IOException {
  if (deserializer == null) {
    return delegate().read(in);
  }
  JsonElement value = Streams.parse(in);
  if (value.isJsonNull()) {
    return null;
  }
  return deserializer.deserialize(value, typeToken.getType(), context);
}
 

@Override public void write(JsonWriter out, T value) throws IOException {
  if (serializer == null) {
    delegate().write(out, value);
    return;
  }
  if (value == null) {
    out.nullValue();
    return;
  }
  JsonElement tree = serializer.serialize(value, typeToken.getType(), context);
  Streams.write(tree, out);
}
 

/**
 * Returns a String representation of this element.
 */
@Override
public String toString() {
  try {
    StringWriter stringWriter = new StringWriter();
    JsonWriter jsonWriter = new JsonWriter(stringWriter);
    jsonWriter.setLenient(true);
    Streams.write(this, jsonWriter);
    return stringWriter.toString();
  } catch (IOException e) {
    throw new AssertionError(e);
  }
}
 

@Override
public void write(final JsonWriter out, final T value) throws IOException {
    final JsonElement element = delegate.toJsonTree(value);
    final JsonObject object = element.getAsJsonObject();

    final URI problemType = URITypeAdapter.TYPE.fromJsonTree(object.remove("type"));
    object.add("type", URITypeAdapter.TYPE.toJsonTree(problemType));

    if (value instanceof AbstractThrowableProblem) {
        flattenParameters(object);
    }

    if (value instanceof Throwable) {
        // Get rid of unwanted fields.
        object.remove("detailMessage");
        object.remove("suppressedExceptions");
        object.remove("stackTrace");

        if (stackTraces) {
            object.add("stacktrace", gson.getAdapter(String[].class)
                    .toJsonTree(stream(((Throwable) value).getStackTrace())
                            .map(Object::toString)
                            .toArray(String[]::new)));
        }
    }

    Streams.write(element, out);
}
 

private <S> void writeObject(S value, JsonWriter out) throws IOException {
  if (value != null) {
    JsonObject jsonObject = new JsonObject();
    jsonObject.add(OBJECT_TYPE, new JsonPrimitive(value.getClass().getName()));
    TypeAdapter<S> delegate =
        (TypeAdapter<S>) this.gson.getDelegateAdapter(this.factory, TypeToken.get(value.getClass()));
    jsonObject.add(OBJECT_DATA, delegate.toJsonTree(value));
    Streams.write(jsonObject, out);
  } else {
    out.nullValue();
  }
}