MVStore Datatype Example

[Paul Fraser]

Hi,

Can anyone point me to a simple example of custom serializer implementing MVStore datatype.

I have found the JackRabbit ValueDatatType but it seems to be very specialized.

Or alternatively, how to code this :-

 public class MyClazz implements DataType {

private String name;

private Integer size;

private boolean running = false;

private Set<String> persons;

private ArrayList<Long> accountIds;

 

    

    public MyClazz() {

     }

 

    @Override

    public int compare(Object arg0, Object arg1) {

        // TODO Auto-generated method stub

        return 0;

    }

    @Override

    public int getMemory(Object arg0) {

        // TODO Auto-generated method stub

        return 0;

    }

    @Override

    public Object read(ByteBuffer buf) {

         return null;

    }

    @Override

    public void read(ByteBuffer buf, Object[] arg1, int arg2, boolean arg3) {

       }

    @Override

    public void write(WriteBuffer arg0, Object arg1) {

     }

    @Override

    public void write(WriteBuffer arg0, Object[] arg1, int arg2, boolean arg3) {

     }

}

An example in the documentation would be a great help.

Thanks,

Paul Fraser

[Noel Grandin]

reading the code of the interface itself:

https://github.com/h2database/h2database/blob/master/h2/src/main/org/h2/mvstore/type/DataType.java

and an example like this:

https://github.com/h2database/h2database/blob/master/h2/src/main/org/h2/mvstore/type/StringDataType.java

​

[Paul F Fraser]

Hi Noel,
>
> https://github.com/h2database/h2database/blob/master/h2/src/main/org/h2/mvstore/type/DataType.java
>
Already done that. ^^^

> and an example like this:
> https://github.com/h2database/h2database/blob/master/h2/src/main/org/h2/mvstore/type/StringDataType.java
>

Just the clue I needed ^^^

Thanks,

Paul Fraser