defining schema for Tuple in java.

[chethan]

Hi,

I have written a UDF which will return Tuple and i am giving Tuple to
another command, but that function expects schema for that Tuple.

i have got the sample but schema is not defining, below is the sample.

public Schema outputSchema(Schema input) {
        try{
            Schema tupleSchema = new Schema();
            tupleSchema.add(input.getField(4));
            tupleSchema.add(input.getField(3));
            tupleSchema.add(input.getField(2));
            tupleSchema.add(input.getField(1));
            tupleSchema.add(input.getField(0));
            System.out.println("inside schema");
            return new Schema(new
Schema.FieldSchema(getSchemaName(this.getClass().getName().toLowerCase(),
input),

  tupleSchema, DataType.TUPLE));

        }catch (Exception e){
                return null;
        }
    }

// this how i am initializing.
Tuple result = TupleFactory.getInstance().newTuple(5);

//values to the tuple are been added.
            result.set(0, 10);
            result.set(1, 20);
            result.set(2, 30);
            result.set(3, 40);
            result.set(4, 50);

I am going wrong,
so how to define schema for Tuple in java.