public interface
DoubleDataLayout
A DataLayout that converts data stored in a buffer to doubles.
See Also
Public Methods
| abstract DoubleDataBuffer |
applyTo(S buffer)
Apply this layout to the provided buffer.
|
| abstract double |
readDouble(S buffer, long index)
Reads
n = scale() buffer values at the given index and return them as a double. |
| abstract Double |
readObject(S buffer, long index)
Reads
n = scale() values from the buffer at the given index and return them as a single
value in the user type. |
| abstract void |
writeDouble(S buffer, double value, long index)
Writes a double into the buffer at the given index after converting it to the buffer type.
|
| abstract void |
writeObject(S buffer, Double value, long index)
|
Inherited Methods
Public Methods
public abstract DoubleDataBuffer applyTo (S buffer)
Apply this layout to the provided buffer.
The returned DataBuffer instance is simply a wrapper to the original buffer and does
not have a backing storage of his own.
Parameters
| buffer | the target buffer to apply this layout to |
|---|
Returns
- a buffer with this layout
public abstract double readDouble (S buffer, long index)
Reads n = scale() buffer values at the given index and return them as a double.
Parameters
| buffer | the buffer to read from |
|---|---|
| index | position of the buffer to read in the buffer |
Returns
- the double value
See Also
public abstract Double readObject (S buffer, long index)
Reads n = scale() values from the buffer at the given index and return them as a single
value in the user type.
It is the responsibility of the implementors of this interface to read the value to be
converted from the given buffer, using the most appropriate method. For example, for a layout
that converting a single long to a BigInteger,
@Override
public BigInteger readObject(LongDataBuffer buffer, long index) {
return BigInteger.valueOf(buffer.getLong(index));
}
If a single user value scales over more than one buffer values, index indicates the
starting position of the sequence to be read from the buffer.Parameters
| buffer | the buffer to read from |
|---|---|
| index | position of the buffer to read in the buffer |
Returns
- the converted value
public abstract void writeDouble (S buffer, double value, long index)
Writes a double into the buffer at the given index after converting it to the buffer type.
Parameters
| buffer | the buffer to write to |
|---|---|
| value | the double to convert and write |
| index | index in the buffer where the converted value should be written |