serializing java.sql.Timestamp returns wrong value at deserialization.

[prateek sharma]

Hi all,

Serializing java.sql.Timestamp is returning wrong value at the time of deserialization.

My use case is very simple. I have one pojo which has few properties and one property of type java.sql.Timestamp. I am setting today's date(i.e. 29-Jan-2014) in this field.

I am using RuntimeSchema to serialize object and I am using GraphIOUtil.writeTo(...) method to serialize this object.

Problem is that when I deserialize it, the resultant object has that timestamp field populated with a date of 3-Jan-1970. :(

Please help.

Thanks,

Pratz

[David Yu]

Note sure why that's happending.  Perhaps the internal field is transient.

You can instead use delegates (more efficient for these scalar types).

See https://code.google.com/p/protostuff/wiki/Delegate

Here's the code:

    public static final Delegate<Timestamp> TIMESTAMP_DELEGATE = new Delegate<Timestamp>()

    {

        public FieldType getFieldType()

        {

            return FieldType.FIXED64;

        }

        public Class<?> typeClass()

        {

            return Timestamp.class;

        }

        

        public Timestamp readFrom(Input input) throws IOException

        {

            return new Timestamp(input.readFixed64());

        }

        public void writeTo(Output output, int number, Timestamp value, boolean repeated)

                throws IOException

        {

            output.writeFixed64(number, value.getTime(), repeated);

        }

        public void transfer(Pipe pipe, Input input, Output output, int number, 

                boolean repeated) throws IOException

        {

            output.writeFixed64(number, input.readFixed64(), repeated);

        }

    };

 

Thanks,

Pratz

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[prateek sharma]

Bingo... It worked. :) But why not to make it by default configuration in protostuff itself. I am using protostuff 1.0.7.

Thanks,

Pratz

[David Yu]

On Fri, Jan 31, 2014 at 8:31 PM, prateek sharma <meprat...@gmail.com> wrote:

Bingo... It worked. :)

Great. 

But why not to make it by default configuration in protostuff itself.

There are too many jdk classes (java.util.*, java.sql.*, javax.*, etc) for them to be included in the core.

A separated module (delegates) is the best place for them.

As a reference, the built-in scalar types, other than String/byte[]/primitive types, are java.util.Date, BigDecimal and BigInteger.

I am using protostuff 1.0.7.

Thanks,

Pratz

On Wednesday, 29 January 2014 18:15:46 UTC+5:30, prateek sharma wrote:

Hi all,

Serializing java.sql.Timestamp is returning wrong value at the time of deserialization.

My use case is very simple. I have one pojo which has few properties and one property of type java.sql.Timestamp. I am setting today's date(i.e. 29-Jan-2014) in this field.

I am using RuntimeSchema to serialize object and I am using GraphIOUtil.writeTo(...) method to serialize this object.

Problem is that when I deserialize it, the resultant object has that timestamp field populated with a date of 3-Jan-1970. :(

Please help.

Thanks,

Pratz

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