JavaFX: How to deserialize dynamically create Area Chart Series?

Question

I am adding series dynamically using list in Area Chart. I want to unwrap the series. I need this because I want to save Area Chart series data in db.

When app execute i

Answer 1

There are various ways to accomplish this. Some are faster than others. I will show you one simple way ti can be done, but please note there are several.

If speed is not a concern than I like to serialize objects into base64 text. This makes it very easy to mover around and store in DB's as text. If I was working on a project that required moving a lot of data an speed mattered, then I might not go with this approach.

1) Use Java serialization to serialize the object into a byte[].

protected byte[] convertToBytes(Object object) throws IOException {
    try (ByteArrayOutputStream bos = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(bos)) {
        out.writeObject(object);
        return bos.toByteArray();
    }
}

protected Object convertFromBytes(byte[] bytes) throws IOException, ClassNotFoundException {
    try (ByteArrayInputStream bis = new ByteArrayInputStream(bytes);
            ObjectInput in = new ObjectInputStream(bis)) {
        return in.readObject();
    }
}

These methods can be used to convert Java objects to convert objects into and out of byte[].

2) Take the byte[] from step 1 and use it to serialize into base64 text. These two methods will turn your seriesContainer into base64 String, or will turn a base64 String into seriesContainer.

public String toBase64() {
    try {
        return Base64.getEncoder().encodeToString(convertToBytes(seriesContainer));
    } catch (IOException ex) {
        throw new RuntimeException("Got exception while converting to bytes.", ex);
    }
}

public void initializeFromBase64(String b64) {
    byte[] bytes = Base64.getDecoder().decode(b64);
    try {
        this.seriesContainer = (LinkedList>) convertFromBytes(bytes);
    } catch (Exception ex) {
        throw new RuntimeException("Got exception while converting from bytes.", ex);
    }
}

3) Take the String from step 2 and put it into a DB, or read it from a DB.